java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf -i ../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Octopussy.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-9f4048f [2018-10-04 12:58:20,841 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-04 12:58:20,842 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-04 12:58:20,854 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-04 12:58:20,855 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-04 12:58:20,856 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-04 12:58:20,857 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-04 12:58:20,859 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-04 12:58:20,860 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-04 12:58:20,861 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-04 12:58:20,862 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-04 12:58:20,862 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-04 12:58:20,863 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-04 12:58:20,864 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-04 12:58:20,865 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-04 12:58:20,866 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-04 12:58:20,868 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-04 12:58:20,870 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-04 12:58:20,877 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-04 12:58:20,882 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-04 12:58:20,883 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-04 12:58:20,887 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-04 12:58:20,891 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-04 12:58:20,891 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-04 12:58:20,892 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-04 12:58:20,893 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-04 12:58:20,894 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-04 12:58:20,895 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-04 12:58:20,895 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-04 12:58:20,897 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-04 12:58:20,897 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-04 12:58:20,898 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-04 12:58:20,898 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-04 12:58:20,898 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-04 12:58:20,900 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-04 12:58:20,901 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-04 12:58:20,901 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-10-04 12:58:20,924 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-04 12:58:20,924 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-04 12:58:20,925 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-04 12:58:20,925 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-04 12:58:20,926 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-04 12:58:20,926 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-04 12:58:20,927 INFO L133 SettingsManager]: * Use SBE=true [2018-10-04 12:58:20,927 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-04 12:58:20,927 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-04 12:58:20,927 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-04 12:58:20,928 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-04 12:58:20,928 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-04 12:58:20,928 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-04 12:58:20,928 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-04 12:58:20,928 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-04 12:58:20,929 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-04 12:58:20,929 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-04 12:58:20,929 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-04 12:58:20,929 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-04 12:58:20,929 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-04 12:58:20,930 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-04 12:58:20,930 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-04 12:58:20,930 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 12:58:20,930 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-04 12:58:20,930 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-04 12:58:20,931 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-04 12:58:20,931 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-04 12:58:20,931 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-04 12:58:20,931 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-04 12:58:20,932 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-04 12:58:20,932 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-10-04 12:58:20,975 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-04 12:58:20,987 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-04 12:58:20,991 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-04 12:58:20,993 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-04 12:58:20,993 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-04 12:58:20,994 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Octopussy.bpl [2018-10-04 12:58:20,994 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Octopussy.bpl' [2018-10-04 12:58:21,047 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-04 12:58:21,049 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-04 12:58:21,050 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-04 12:58:21,051 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-04 12:58:21,051 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-04 12:58:21,074 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:58:21" (1/1) ... [2018-10-04 12:58:21,086 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:58:21" (1/1) ... [2018-10-04 12:58:21,091 WARN L165 Inliner]: Program contained no entry procedure! [2018-10-04 12:58:21,091 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-10-04 12:58:21,091 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-10-04 12:58:21,094 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-04 12:58:21,094 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-04 12:58:21,095 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-04 12:58:21,095 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-04 12:58:21,106 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:58:21" (1/1) ... [2018-10-04 12:58:21,106 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:58:21" (1/1) ... [2018-10-04 12:58:21,107 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:58:21" (1/1) ... [2018-10-04 12:58:21,107 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:58:21" (1/1) ... [2018-10-04 12:58:21,109 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:58:21" (1/1) ... [2018-10-04 12:58:21,113 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:58:21" (1/1) ... [2018-10-04 12:58:21,114 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:58:21" (1/1) ... [2018-10-04 12:58:21,116 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-04 12:58:21,116 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-04 12:58:21,116 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-04 12:58:21,117 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-04 12:58:21,118 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:58:21" (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 [2018-10-04 12:58:21,189 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-10-04 12:58:21,189 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-04 12:58:21,190 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-04 12:58:21,401 INFO L338 CfgBuilder]: Using library mode [2018-10-04 12:58:21,401 INFO L202 PluginConnector]: Adding new model Octopussy.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 12:58:21 BoogieIcfgContainer [2018-10-04 12:58:21,402 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-04 12:58:21,402 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-04 12:58:21,403 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-04 12:58:21,406 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-04 12:58:21,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:58:21" (1/2) ... [2018-10-04 12:58:21,408 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ecf33b1 and model type Octopussy.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 12:58:21, skipping insertion in model container [2018-10-04 12:58:21,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 12:58:21" (2/2) ... [2018-10-04 12:58:21,410 INFO L112 eAbstractionObserver]: Analyzing ICFG Octopussy.bpl [2018-10-04 12:58:21,421 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-04 12:58:21,433 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-04 12:58:21,491 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-04 12:58:21,492 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-04 12:58:21,493 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-04 12:58:21,493 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-04 12:58:21,493 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-04 12:58:21,493 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-04 12:58:21,494 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-04 12:58:21,494 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-04 12:58:21,494 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-04 12:58:21,511 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-10-04 12:58:21,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-10-04 12:58:21,525 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:21,526 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-10-04 12:58:21,527 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:21,536 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:21,536 INFO L82 PathProgramCache]: Analyzing trace with hash 30048, now seen corresponding path program 1 times [2018-10-04 12:58:21,539 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:21,539 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:21,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:21,586 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:58:21,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:21,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:21,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:21,761 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 12:58:21,762 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-04 12:58:21,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-04 12:58:21,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-04 12:58:21,783 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:21,786 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-10-04 12:58:21,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:21,902 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2018-10-04 12:58:21,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-04 12:58:21,906 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-10-04 12:58:21,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:21,922 INFO L225 Difference]: With dead ends: 13 [2018-10-04 12:58:21,923 INFO L226 Difference]: Without dead ends: 5 [2018-10-04 12:58:21,928 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime 1 [2018-10-04 12:58:21,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-10-04 12:58:21,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-10-04 12:58:21,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-10-04 12:58:21,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-10-04 12:58:21,962 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-10-04 12:58:21,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:21,963 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-10-04 12:58:21,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-04 12:58:21,963 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-10-04 12:58:21,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-04 12:58:21,964 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:21,964 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-10-04 12:58:21,964 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:21,964 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:21,965 INFO L82 PathProgramCache]: Analyzing trace with hash 927622, now seen corresponding path program 1 times [2018-10-04 12:58:21,965 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:21,965 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:21,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:21,966 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:58:21,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:21,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:22,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:22,132 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:22,132 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 [2018-10-04 12:58:22,150 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:58:22,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:22,167 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:22,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:22,236 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:22,236 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-10-04 12:58:22,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-04 12:58:22,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-04 12:58:22,237 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:22,238 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 4 states. [2018-10-04 12:58:22,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:22,291 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-10-04 12:58:22,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-04 12:58:22,295 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-10-04 12:58:22,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:22,296 INFO L225 Difference]: With dead ends: 8 [2018-10-04 12:58:22,296 INFO L226 Difference]: Without dead ends: 6 [2018-10-04 12:58:22,297 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 2 [2018-10-04 12:58:22,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-10-04 12:58:22,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-10-04 12:58:22,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-10-04 12:58:22,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-10-04 12:58:22,301 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-10-04 12:58:22,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:22,302 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-10-04 12:58:22,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-04 12:58:22,302 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-10-04 12:58:22,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-10-04 12:58:22,302 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:22,302 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-10-04 12:58:22,303 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:22,303 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:22,303 INFO L82 PathProgramCache]: Analyzing trace with hash 28752416, now seen corresponding path program 2 times [2018-10-04 12:58:22,304 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:22,304 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:22,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:22,305 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:58:22,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:22,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:22,378 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:22,378 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:22,378 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 [2018-10-04 12:58:22,395 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:58:22,409 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:58:22,409 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:22,411 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:22,447 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:22,468 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:22,468 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-04 12:58:22,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-04 12:58:22,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-04 12:58:22,469 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:22,469 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 5 states. [2018-10-04 12:58:22,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:22,489 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-10-04 12:58:22,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 12:58:22,490 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2018-10-04 12:58:22,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:22,490 INFO L225 Difference]: With dead ends: 9 [2018-10-04 12:58:22,490 INFO L226 Difference]: Without dead ends: 7 [2018-10-04 12:58:22,491 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime 3 [2018-10-04 12:58:22,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-04 12:58:22,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-04 12:58:22,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-04 12:58:22,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-10-04 12:58:22,494 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-10-04 12:58:22,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:22,494 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-10-04 12:58:22,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-04 12:58:22,494 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-10-04 12:58:22,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-04 12:58:22,495 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:22,495 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2018-10-04 12:58:22,495 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:22,495 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:22,496 INFO L82 PathProgramCache]: Analyzing trace with hash 891321030, now seen corresponding path program 3 times [2018-10-04 12:58:22,496 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:22,496 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:22,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:22,497 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:22,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:22,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:22,604 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:22,604 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:22,604 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 [2018-10-04 12:58:22,617 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:58:22,632 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-04 12:58:22,633 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:22,634 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:22,698 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:22,718 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:22,718 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-04 12:58:22,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-04 12:58:22,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-04 12:58:22,719 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:22,719 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2018-10-04 12:58:22,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:22,738 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-10-04 12:58:22,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 12:58:22,740 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2018-10-04 12:58:22,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:22,741 INFO L225 Difference]: With dead ends: 10 [2018-10-04 12:58:22,741 INFO L226 Difference]: Without dead ends: 8 [2018-10-04 12:58:22,741 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 4 [2018-10-04 12:58:22,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-04 12:58:22,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-10-04 12:58:22,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-04 12:58:22,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-10-04 12:58:22,744 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-10-04 12:58:22,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:22,744 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-10-04 12:58:22,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-04 12:58:22,745 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-10-04 12:58:22,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-04 12:58:22,745 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:22,745 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1, 1] [2018-10-04 12:58:22,745 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:22,746 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:22,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1861144288, now seen corresponding path program 4 times [2018-10-04 12:58:22,746 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:22,746 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:22,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:22,747 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:22,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:22,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:23,042 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:23,042 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:23,042 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 [2018-10-04 12:58:23,052 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:58:23,063 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:58:23,063 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:23,064 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:23,100 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:23,121 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:23,121 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-04 12:58:23,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-04 12:58:23,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-04 12:58:23,122 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:23,122 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 7 states. [2018-10-04 12:58:23,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:23,170 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-04 12:58:23,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 12:58:23,171 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-10-04 12:58:23,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:23,172 INFO L225 Difference]: With dead ends: 11 [2018-10-04 12:58:23,172 INFO L226 Difference]: Without dead ends: 9 [2018-10-04 12:58:23,172 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 5 [2018-10-04 12:58:23,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-04 12:58:23,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-04 12:58:23,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-04 12:58:23,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-10-04 12:58:23,176 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-10-04 12:58:23,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:23,176 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-10-04 12:58:23,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-04 12:58:23,176 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-10-04 12:58:23,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-04 12:58:23,177 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:23,177 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1] [2018-10-04 12:58:23,177 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:23,178 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:23,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1860894214, now seen corresponding path program 5 times [2018-10-04 12:58:23,178 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:23,178 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:23,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:23,179 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:23,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:23,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:23,298 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:23,298 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:23,298 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 [2018-10-04 12:58:23,312 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:58:23,376 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-04 12:58:23,376 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:23,378 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:23,444 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:23,465 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:23,465 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 12:58:23,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 12:58:23,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 12:58:23,466 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:23,466 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 8 states. [2018-10-04 12:58:23,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:23,491 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-10-04 12:58:23,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 12:58:23,492 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2018-10-04 12:58:23,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:23,493 INFO L225 Difference]: With dead ends: 12 [2018-10-04 12:58:23,493 INFO L226 Difference]: Without dead ends: 10 [2018-10-04 12:58:23,494 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 6 [2018-10-04 12:58:23,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-04 12:58:23,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-04 12:58:23,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-04 12:58:23,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-10-04 12:58:23,500 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-10-04 12:58:23,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:23,501 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-10-04 12:58:23,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 12:58:23,501 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-10-04 12:58:23,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-04 12:58:23,501 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:23,501 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1, 1] [2018-10-04 12:58:23,502 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:23,502 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:23,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1853141920, now seen corresponding path program 6 times [2018-10-04 12:58:23,502 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:23,502 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:23,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:23,504 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:23,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:23,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:23,617 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:23,617 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:23,618 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 [2018-10-04 12:58:23,627 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:58:23,637 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-10-04 12:58:23,637 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:23,639 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:23,681 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:23,701 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:23,702 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 12:58:23,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 12:58:23,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 12:58:23,702 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:23,703 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 9 states. [2018-10-04 12:58:23,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:23,739 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-10-04 12:58:23,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 12:58:23,740 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2018-10-04 12:58:23,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:23,740 INFO L225 Difference]: With dead ends: 13 [2018-10-04 12:58:23,741 INFO L226 Difference]: Without dead ends: 11 [2018-10-04 12:58:23,741 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 7 [2018-10-04 12:58:23,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-04 12:58:23,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-04 12:58:23,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-04 12:58:23,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-04 12:58:23,745 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-10-04 12:58:23,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:23,746 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-04 12:58:23,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 12:58:23,746 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-04 12:58:23,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-04 12:58:23,746 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:23,747 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1, 1] [2018-10-04 12:58:23,747 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:23,747 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:23,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1612820806, now seen corresponding path program 7 times [2018-10-04 12:58:23,748 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:23,748 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:23,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:23,749 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:23,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:23,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:24,248 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:24,249 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:24,249 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 [2018-10-04 12:58:24,263 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:58:24,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:24,283 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:24,345 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:24,366 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:24,366 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 12:58:24,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 12:58:24,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 12:58:24,366 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:24,367 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-10-04 12:58:24,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:24,414 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-10-04 12:58:24,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 12:58:24,415 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2018-10-04 12:58:24,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:24,415 INFO L225 Difference]: With dead ends: 14 [2018-10-04 12:58:24,415 INFO L226 Difference]: Without dead ends: 12 [2018-10-04 12:58:24,416 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 8 [2018-10-04 12:58:24,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-04 12:58:24,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-04 12:58:24,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-04 12:58:24,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-10-04 12:58:24,419 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-10-04 12:58:24,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:24,419 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-10-04 12:58:24,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 12:58:24,419 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-10-04 12:58:24,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-04 12:58:24,420 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:24,420 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1, 1] [2018-10-04 12:58:24,420 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:24,420 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:24,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1542166432, now seen corresponding path program 8 times [2018-10-04 12:58:24,420 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:24,420 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:24,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:24,421 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:58:24,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:24,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:24,655 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:24,655 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:24,655 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:58:24,673 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:58:24,685 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:58:24,686 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:24,687 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:24,741 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:24,763 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:24,764 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 12:58:24,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 12:58:24,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 12:58:24,764 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:24,768 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 11 states. [2018-10-04 12:58:24,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:24,826 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-10-04 12:58:24,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 12:58:24,827 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2018-10-04 12:58:24,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:24,828 INFO L225 Difference]: With dead ends: 15 [2018-10-04 12:58:24,828 INFO L226 Difference]: Without dead ends: 13 [2018-10-04 12:58:24,829 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 9 [2018-10-04 12:58:24,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-04 12:58:24,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-04 12:58:24,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-04 12:58:24,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-10-04 12:58:24,832 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-10-04 12:58:24,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:24,832 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-10-04 12:58:24,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 12:58:24,832 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-10-04 12:58:24,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-04 12:58:24,833 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:24,833 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1, 1] [2018-10-04 12:58:24,833 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:24,834 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:24,834 INFO L82 PathProgramCache]: Analyzing trace with hash -562523002, now seen corresponding path program 9 times [2018-10-04 12:58:24,834 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:24,834 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:24,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:24,835 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:24,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:24,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:25,050 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:25,050 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:25,050 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:58:25,060 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:58:25,096 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-04 12:58:25,097 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:25,098 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:25,147 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:25,168 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:25,168 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-04 12:58:25,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-04 12:58:25,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-04 12:58:25,169 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:25,169 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 12 states. [2018-10-04 12:58:25,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:25,208 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-10-04 12:58:25,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-04 12:58:25,209 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2018-10-04 12:58:25,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:25,210 INFO L225 Difference]: With dead ends: 16 [2018-10-04 12:58:25,210 INFO L226 Difference]: Without dead ends: 14 [2018-10-04 12:58:25,210 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 10 [2018-10-04 12:58:25,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-04 12:58:25,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-04 12:58:25,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-04 12:58:25,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-04 12:58:25,214 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-10-04 12:58:25,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:25,215 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-04 12:58:25,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-04 12:58:25,215 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-04 12:58:25,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-04 12:58:25,215 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:25,215 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1, 1] [2018-10-04 12:58:25,216 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:25,216 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:25,216 INFO L82 PathProgramCache]: Analyzing trace with hash -258347744, now seen corresponding path program 10 times [2018-10-04 12:58:25,216 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:25,216 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:25,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:25,217 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:25,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:25,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:25,444 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:25,445 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:25,445 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:58:25,455 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:58:25,471 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:58:25,472 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:25,473 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:25,529 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:25,549 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:25,549 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-04 12:58:25,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-04 12:58:25,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-04 12:58:25,550 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:25,550 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 13 states. [2018-10-04 12:58:25,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:25,615 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-10-04 12:58:25,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-04 12:58:25,616 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 13 [2018-10-04 12:58:25,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:25,616 INFO L225 Difference]: With dead ends: 17 [2018-10-04 12:58:25,616 INFO L226 Difference]: Without dead ends: 15 [2018-10-04 12:58:25,617 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 11 [2018-10-04 12:58:25,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-04 12:58:25,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-04 12:58:25,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-04 12:58:25,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-04 12:58:25,620 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-10-04 12:58:25,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:25,620 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-04 12:58:25,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-04 12:58:25,620 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-04 12:58:25,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-04 12:58:25,621 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:25,621 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1, 1] [2018-10-04 12:58:25,621 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:25,621 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:25,622 INFO L82 PathProgramCache]: Analyzing trace with hash 581150662, now seen corresponding path program 11 times [2018-10-04 12:58:25,622 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:25,622 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:25,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:25,623 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:25,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:25,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:25,893 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:25,893 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:25,893 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:58:25,901 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:58:25,912 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-04 12:58:25,912 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:25,914 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:25,961 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:25,981 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:25,982 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-04 12:58:25,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 12:58:25,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 12:58:25,982 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:25,983 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 14 states. [2018-10-04 12:58:26,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:26,027 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-10-04 12:58:26,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-04 12:58:26,028 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-10-04 12:58:26,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:26,029 INFO L225 Difference]: With dead ends: 18 [2018-10-04 12:58:26,029 INFO L226 Difference]: Without dead ends: 16 [2018-10-04 12:58:26,029 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 12 [2018-10-04 12:58:26,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-04 12:58:26,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-04 12:58:26,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-04 12:58:26,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-10-04 12:58:26,032 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-10-04 12:58:26,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:26,033 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-10-04 12:58:26,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 12:58:26,033 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-10-04 12:58:26,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 12:58:26,034 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:26,034 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1, 1] [2018-10-04 12:58:26,034 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:26,034 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:26,034 INFO L82 PathProgramCache]: Analyzing trace with hash 835797472, now seen corresponding path program 12 times [2018-10-04 12:58:26,034 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:26,034 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:26,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:26,035 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:26,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:26,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:26,183 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:26,183 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:26,183 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 [2018-10-04 12:58:26,192 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:58:26,206 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-04 12:58:26,206 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:26,209 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:26,254 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:26,279 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:26,280 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-04 12:58:26,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-04 12:58:26,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-04 12:58:26,280 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:26,281 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 15 states. [2018-10-04 12:58:26,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:26,318 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-04 12:58:26,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-04 12:58:26,319 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-10-04 12:58:26,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:26,320 INFO L225 Difference]: With dead ends: 19 [2018-10-04 12:58:26,320 INFO L226 Difference]: Without dead ends: 17 [2018-10-04 12:58:26,321 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 13 [2018-10-04 12:58:26,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-04 12:58:26,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-04 12:58:26,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-04 12:58:26,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-04 12:58:26,326 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-10-04 12:58:26,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:26,327 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-04 12:58:26,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-04 12:58:26,327 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-04 12:58:26,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-04 12:58:26,327 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:26,327 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1, 1] [2018-10-04 12:58:26,328 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:26,328 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:26,328 INFO L82 PathProgramCache]: Analyzing trace with hash 139913990, now seen corresponding path program 13 times [2018-10-04 12:58:26,328 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:26,328 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:26,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:26,329 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:26,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:26,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:26,524 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:26,524 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:26,525 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 [2018-10-04 12:58:26,534 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:58:26,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:26,545 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:26,593 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:26,614 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:26,614 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-04 12:58:26,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-04 12:58:26,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-04 12:58:26,615 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:26,615 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 16 states. [2018-10-04 12:58:26,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:26,787 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-10-04 12:58:26,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-04 12:58:26,789 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2018-10-04 12:58:26,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:26,790 INFO L225 Difference]: With dead ends: 20 [2018-10-04 12:58:26,790 INFO L226 Difference]: Without dead ends: 18 [2018-10-04 12:58:26,790 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 14 [2018-10-04 12:58:26,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-04 12:58:26,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-04 12:58:26,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-04 12:58:26,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-04 12:58:26,794 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-10-04 12:58:26,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:26,794 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-04 12:58:26,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-04 12:58:26,794 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-04 12:58:26,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 12:58:26,795 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:26,795 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1, 1] [2018-10-04 12:58:26,795 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:26,795 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:26,795 INFO L82 PathProgramCache]: Analyzing trace with hash 42362528, now seen corresponding path program 14 times [2018-10-04 12:58:26,795 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:26,795 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:26,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:26,796 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:58:26,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:26,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:27,025 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:27,026 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:27,026 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 [2018-10-04 12:58:27,034 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:58:27,061 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:58:27,061 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:27,063 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:27,118 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:27,138 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:27,138 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-04 12:58:27,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-04 12:58:27,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-04 12:58:27,139 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:27,139 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 17 states. [2018-10-04 12:58:27,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:27,186 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-04 12:58:27,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-04 12:58:27,187 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2018-10-04 12:58:27,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:27,188 INFO L225 Difference]: With dead ends: 21 [2018-10-04 12:58:27,188 INFO L226 Difference]: Without dead ends: 19 [2018-10-04 12:58:27,188 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 15 [2018-10-04 12:58:27,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-04 12:58:27,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-04 12:58:27,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-04 12:58:27,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-04 12:58:27,192 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-10-04 12:58:27,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:27,192 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-04 12:58:27,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-04 12:58:27,193 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-04 12:58:27,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-04 12:58:27,193 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:27,193 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1, 1] [2018-10-04 12:58:27,194 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:27,194 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:27,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1313234502, now seen corresponding path program 15 times [2018-10-04 12:58:27,194 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:27,194 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:27,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:27,195 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:27,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:27,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:27,623 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:27,624 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:27,624 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 [2018-10-04 12:58:27,631 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:58:27,665 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-04 12:58:27,665 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:27,666 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:27,797 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:27,818 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:27,818 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-04 12:58:27,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-04 12:58:27,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-04 12:58:27,819 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:27,819 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 18 states. [2018-10-04 12:58:27,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:27,849 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-10-04 12:58:27,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-04 12:58:27,849 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-10-04 12:58:27,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:27,850 INFO L225 Difference]: With dead ends: 22 [2018-10-04 12:58:27,850 INFO L226 Difference]: Without dead ends: 20 [2018-10-04 12:58:27,851 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 16 [2018-10-04 12:58:27,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-04 12:58:27,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-04 12:58:27,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-04 12:58:27,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-10-04 12:58:27,854 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-10-04 12:58:27,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:27,855 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-10-04 12:58:27,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-04 12:58:27,855 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-10-04 12:58:27,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 12:58:27,855 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:27,855 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1, 1] [2018-10-04 12:58:27,856 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:27,856 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:27,856 INFO L82 PathProgramCache]: Analyzing trace with hash 2055560032, now seen corresponding path program 16 times [2018-10-04 12:58:27,856 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:27,856 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:27,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:27,857 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:27,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:27,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:28,279 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:28,280 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:28,280 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 [2018-10-04 12:58:28,288 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:58:28,319 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:58:28,320 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:28,322 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:28,493 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:28,514 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:28,514 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-04 12:58:28,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-04 12:58:28,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-04 12:58:28,515 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:28,515 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 19 states. [2018-10-04 12:58:28,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:28,588 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-04 12:58:28,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-04 12:58:28,589 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2018-10-04 12:58:28,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:28,589 INFO L225 Difference]: With dead ends: 23 [2018-10-04 12:58:28,589 INFO L226 Difference]: Without dead ends: 21 [2018-10-04 12:58:28,590 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.2s impTime 17 [2018-10-04 12:58:28,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-04 12:58:28,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-04 12:58:28,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-04 12:58:28,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-04 12:58:28,593 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-10-04 12:58:28,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:28,594 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-04 12:58:28,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-04 12:58:28,594 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-04 12:58:28,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-04 12:58:28,595 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:28,595 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1, 1] [2018-10-04 12:58:28,595 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:28,595 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:28,595 INFO L82 PathProgramCache]: Analyzing trace with hash -702152314, now seen corresponding path program 17 times [2018-10-04 12:58:28,595 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:28,596 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:28,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:28,596 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:28,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:28,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:28,920 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:28,921 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:28,921 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 [2018-10-04 12:58:28,929 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:58:28,956 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-04 12:58:28,956 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:28,959 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:29,022 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:29,043 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:29,044 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-04 12:58:29,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 12:58:29,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 12:58:29,044 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:29,044 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 20 states. [2018-10-04 12:58:29,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:29,090 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-10-04 12:58:29,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-04 12:58:29,091 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2018-10-04 12:58:29,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:29,091 INFO L225 Difference]: With dead ends: 24 [2018-10-04 12:58:29,092 INFO L226 Difference]: Without dead ends: 22 [2018-10-04 12:58:29,092 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 18 [2018-10-04 12:58:29,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-04 12:58:29,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-04 12:58:29,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-04 12:58:29,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-10-04 12:58:29,096 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-10-04 12:58:29,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:29,096 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-10-04 12:58:29,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 12:58:29,096 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-10-04 12:58:29,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-04 12:58:29,097 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:29,097 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1, 1] [2018-10-04 12:58:29,097 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:29,098 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:29,098 INFO L82 PathProgramCache]: Analyzing trace with hash -291889120, now seen corresponding path program 18 times [2018-10-04 12:58:29,098 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:29,098 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:29,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:29,099 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:29,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:29,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:29,307 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:58:29,309 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:29,309 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:29,309 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 [2018-10-04 12:58:29,320 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:58:29,450 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-04 12:58:29,450 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:29,452 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:29,698 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:29,726 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:29,726 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-04 12:58:29,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-04 12:58:29,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-04 12:58:29,727 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:29,727 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 21 states. [2018-10-04 12:58:29,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:29,770 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-04 12:58:29,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-04 12:58:29,771 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 21 [2018-10-04 12:58:29,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:29,772 INFO L225 Difference]: With dead ends: 25 [2018-10-04 12:58:29,772 INFO L226 Difference]: Without dead ends: 23 [2018-10-04 12:58:29,773 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.1s impTime 6 [2018-10-04 12:58:29,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-04 12:58:29,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-04 12:58:29,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-04 12:58:29,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-04 12:58:29,776 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-10-04 12:58:29,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:29,776 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-04 12:58:29,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-04 12:58:29,777 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-04 12:58:29,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-04 12:58:29,777 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:29,777 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1, 1] [2018-10-04 12:58:29,778 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:29,778 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:29,778 INFO L82 PathProgramCache]: Analyzing trace with hash -458631994, now seen corresponding path program 19 times [2018-10-04 12:58:29,778 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:29,778 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:29,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:29,779 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:29,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:29,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:30,054 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:58:30,074 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:30,075 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:30,075 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 [2018-10-04 12:58:30,083 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:58:30,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:30,113 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:30,179 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:30,201 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:30,201 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-04 12:58:30,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-04 12:58:30,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-04 12:58:30,201 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:30,202 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 22 states. [2018-10-04 12:58:30,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:30,305 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-10-04 12:58:30,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-04 12:58:30,306 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2018-10-04 12:58:30,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:30,307 INFO L225 Difference]: With dead ends: 26 [2018-10-04 12:58:30,307 INFO L226 Difference]: Without dead ends: 24 [2018-10-04 12:58:30,307 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 7 [2018-10-04 12:58:30,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-04 12:58:30,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-04 12:58:30,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-04 12:58:30,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-10-04 12:58:30,311 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-10-04 12:58:30,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:30,311 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-10-04 12:58:30,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-04 12:58:30,311 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-10-04 12:58:30,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-04 12:58:30,312 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:30,312 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1, 1] [2018-10-04 12:58:30,313 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:30,313 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:30,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1332693792, now seen corresponding path program 20 times [2018-10-04 12:58:30,313 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:30,313 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:30,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:30,314 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:58:30,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:30,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:30,623 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:58:30,663 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:30,663 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:30,663 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 [2018-10-04 12:58:30,673 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:58:30,705 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:58:30,705 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:30,707 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:30,860 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:30,885 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:30,885 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-04 12:58:30,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-04 12:58:30,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-04 12:58:30,886 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:30,886 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 23 states. [2018-10-04 12:58:30,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:30,922 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-04 12:58:30,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-04 12:58:30,927 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 23 [2018-10-04 12:58:30,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:30,927 INFO L225 Difference]: With dead ends: 27 [2018-10-04 12:58:30,927 INFO L226 Difference]: Without dead ends: 25 [2018-10-04 12:58:30,928 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 8 [2018-10-04 12:58:30,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-04 12:58:30,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-04 12:58:30,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-04 12:58:30,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-10-04 12:58:30,932 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-10-04 12:58:30,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:30,932 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-10-04 12:58:30,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-04 12:58:30,933 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-10-04 12:58:30,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-04 12:58:30,935 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:30,935 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1, 1] [2018-10-04 12:58:30,935 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:30,935 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:30,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1636161542, now seen corresponding path program 21 times [2018-10-04 12:58:30,935 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:30,935 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:30,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:30,936 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:30,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:30,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:31,281 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:58:31,344 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:31,344 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:31,344 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 [2018-10-04 12:58:31,353 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:58:31,373 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-04 12:58:31,373 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:31,375 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:31,425 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:31,445 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:31,446 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-04 12:58:31,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-04 12:58:31,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-04 12:58:31,446 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:31,446 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 24 states. [2018-10-04 12:58:31,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:31,489 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-10-04 12:58:31,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-04 12:58:31,492 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 24 [2018-10-04 12:58:31,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:31,493 INFO L225 Difference]: With dead ends: 28 [2018-10-04 12:58:31,493 INFO L226 Difference]: Without dead ends: 26 [2018-10-04 12:58:31,493 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 9 [2018-10-04 12:58:31,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-04 12:58:31,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-10-04 12:58:31,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-04 12:58:31,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-10-04 12:58:31,497 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-10-04 12:58:31,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:31,497 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-10-04 12:58:31,497 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-04 12:58:31,497 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-10-04 12:58:31,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-04 12:58:31,498 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:31,498 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1, 1] [2018-10-04 12:58:31,498 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:31,498 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:31,498 INFO L82 PathProgramCache]: Analyzing trace with hash -818603616, now seen corresponding path program 22 times [2018-10-04 12:58:31,498 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:31,499 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:31,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:31,499 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:31,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:31,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:31,818 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:58:31,871 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:31,871 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:31,871 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 [2018-10-04 12:58:31,879 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:58:31,893 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:58:31,893 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:31,895 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:32,015 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:32,048 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:32,048 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-04 12:58:32,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-04 12:58:32,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-04 12:58:32,049 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:32,049 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 25 states. [2018-10-04 12:58:32,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:32,377 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-04 12:58:32,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-04 12:58:32,378 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 25 [2018-10-04 12:58:32,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:32,378 INFO L225 Difference]: With dead ends: 29 [2018-10-04 12:58:32,379 INFO L226 Difference]: Without dead ends: 27 [2018-10-04 12:58:32,379 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 10 [2018-10-04 12:58:32,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-04 12:58:32,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-04 12:58:32,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-04 12:58:32,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-04 12:58:32,383 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-10-04 12:58:32,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:32,383 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-04 12:58:32,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-04 12:58:32,383 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-04 12:58:32,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-04 12:58:32,384 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:32,384 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1, 1] [2018-10-04 12:58:32,384 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:32,384 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:32,384 INFO L82 PathProgramCache]: Analyzing trace with hash 393087814, now seen corresponding path program 23 times [2018-10-04 12:58:32,385 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:32,385 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:32,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:32,385 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:32,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:32,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:32,869 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:58:32,899 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:32,900 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:32,900 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 [2018-10-04 12:58:32,907 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:58:32,925 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-04 12:58:32,926 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:32,927 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:33,018 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:33,038 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:33,039 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-04 12:58:33,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-04 12:58:33,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-04 12:58:33,039 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:33,039 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 26 states. [2018-10-04 12:58:33,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:33,071 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-10-04 12:58:33,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-04 12:58:33,075 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 26 [2018-10-04 12:58:33,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:33,075 INFO L225 Difference]: With dead ends: 30 [2018-10-04 12:58:33,075 INFO L226 Difference]: Without dead ends: 28 [2018-10-04 12:58:33,076 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 11 [2018-10-04 12:58:33,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-04 12:58:33,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-10-04 12:58:33,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 12:58:33,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-10-04 12:58:33,081 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-10-04 12:58:33,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:33,081 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-10-04 12:58:33,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-04 12:58:33,081 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-10-04 12:58:33,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-04 12:58:33,082 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:33,082 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1, 1] [2018-10-04 12:58:33,082 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:33,082 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:33,083 INFO L82 PathProgramCache]: Analyzing trace with hash -699183520, now seen corresponding path program 24 times [2018-10-04 12:58:33,083 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:33,083 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:33,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:33,084 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:33,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:33,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:33,767 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:58:33,825 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:33,825 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:33,825 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 [2018-10-04 12:58:33,832 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:58:33,859 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-04 12:58:33,859 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:33,861 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:33,989 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:34,010 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:34,010 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-04 12:58:34,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-04 12:58:34,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-04 12:58:34,011 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:34,011 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 27 states. [2018-10-04 12:58:34,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:34,068 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-04 12:58:34,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-04 12:58:34,068 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 27 [2018-10-04 12:58:34,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:34,069 INFO L225 Difference]: With dead ends: 31 [2018-10-04 12:58:34,069 INFO L226 Difference]: Without dead ends: 29 [2018-10-04 12:58:34,070 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.4s impTime 12 [2018-10-04 12:58:34,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-04 12:58:34,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-04 12:58:34,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-04 12:58:34,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-04 12:58:34,074 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-10-04 12:58:34,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:34,075 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-04 12:58:34,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-04 12:58:34,075 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-04 12:58:34,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-04 12:58:34,075 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:34,076 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1, 1] [2018-10-04 12:58:34,076 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:34,076 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:34,076 INFO L82 PathProgramCache]: Analyzing trace with hash -199856506, now seen corresponding path program 25 times [2018-10-04 12:58:34,076 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:34,077 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:34,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:34,077 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:34,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:34,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:34,352 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:58:34,485 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:34,486 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:34,486 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 [2018-10-04 12:58:34,494 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:58:34,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:34,514 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:34,565 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:34,587 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:34,587 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-04 12:58:34,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-04 12:58:34,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-04 12:58:34,588 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:34,588 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 28 states. [2018-10-04 12:58:34,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:34,648 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-10-04 12:58:34,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-04 12:58:34,649 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 28 [2018-10-04 12:58:34,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:34,649 INFO L225 Difference]: With dead ends: 32 [2018-10-04 12:58:34,649 INFO L226 Difference]: Without dead ends: 30 [2018-10-04 12:58:34,650 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 13 [2018-10-04 12:58:34,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-04 12:58:34,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-10-04 12:58:34,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 12:58:34,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-10-04 12:58:34,654 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-10-04 12:58:34,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:34,654 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-10-04 12:58:34,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-04 12:58:34,655 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-10-04 12:58:34,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-04 12:58:34,655 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:34,655 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1, 1] [2018-10-04 12:58:34,656 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:34,656 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:34,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1900588256, now seen corresponding path program 26 times [2018-10-04 12:58:34,656 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:34,656 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:34,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:34,657 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:58:34,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:34,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:34,843 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:58:34,977 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:34,977 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:34,977 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 [2018-10-04 12:58:34,984 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:58:35,002 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:58:35,003 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:35,005 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:35,102 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:35,121 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:35,122 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-04 12:58:35,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-04 12:58:35,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-04 12:58:35,122 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:35,122 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 29 states. [2018-10-04 12:58:35,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:35,252 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-04 12:58:35,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-04 12:58:35,253 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 29 [2018-10-04 12:58:35,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:35,254 INFO L225 Difference]: With dead ends: 33 [2018-10-04 12:58:35,254 INFO L226 Difference]: Without dead ends: 31 [2018-10-04 12:58:35,254 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.2s impTime 14 [2018-10-04 12:58:35,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-04 12:58:35,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-04 12:58:35,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-04 12:58:35,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-10-04 12:58:35,259 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-10-04 12:58:35,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:35,260 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-10-04 12:58:35,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-04 12:58:35,260 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-10-04 12:58:35,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-04 12:58:35,260 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:35,260 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1, 1] [2018-10-04 12:58:35,261 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:35,261 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:35,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1211302342, now seen corresponding path program 27 times [2018-10-04 12:58:35,261 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:35,261 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:35,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:35,262 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:35,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:35,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:35,513 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:58:35,610 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:35,610 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:35,610 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 [2018-10-04 12:58:35,619 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:58:35,649 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-04 12:58:35,649 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:35,651 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:35,766 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:35,786 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:35,786 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-04 12:58:35,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-04 12:58:35,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-04 12:58:35,787 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:35,787 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 30 states. [2018-10-04 12:58:35,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:35,826 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-10-04 12:58:35,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-04 12:58:35,826 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 30 [2018-10-04 12:58:35,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:35,827 INFO L225 Difference]: With dead ends: 34 [2018-10-04 12:58:35,827 INFO L226 Difference]: Without dead ends: 32 [2018-10-04 12:58:35,827 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 15 [2018-10-04 12:58:35,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-04 12:58:35,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-10-04 12:58:35,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 12:58:35,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-10-04 12:58:35,832 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-10-04 12:58:35,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:35,832 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-10-04 12:58:35,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-04 12:58:35,832 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-10-04 12:58:35,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-04 12:58:35,833 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:35,833 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1, 1] [2018-10-04 12:58:35,833 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:35,833 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:35,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1104336928, now seen corresponding path program 28 times [2018-10-04 12:58:35,834 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:35,834 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:35,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:35,834 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:35,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:35,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:36,164 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:58:36,381 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:36,382 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:36,382 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 [2018-10-04 12:58:36,396 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:58:36,418 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:58:36,418 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:36,420 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:36,493 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:36,515 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:36,515 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-04 12:58:36,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-04 12:58:36,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-04 12:58:36,515 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:36,516 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 31 states. [2018-10-04 12:58:36,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:36,570 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-10-04 12:58:36,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-04 12:58:36,571 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 31 [2018-10-04 12:58:36,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:36,572 INFO L225 Difference]: With dead ends: 35 [2018-10-04 12:58:36,572 INFO L226 Difference]: Without dead ends: 33 [2018-10-04 12:58:36,572 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.4s impTime 16 [2018-10-04 12:58:36,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-04 12:58:36,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-04 12:58:36,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-04 12:58:36,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-10-04 12:58:36,576 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-10-04 12:58:36,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:36,576 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-10-04 12:58:36,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-04 12:58:36,576 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-10-04 12:58:36,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-04 12:58:36,577 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:36,577 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1, 1] [2018-10-04 12:58:36,577 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:36,577 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:36,577 INFO L82 PathProgramCache]: Analyzing trace with hash 125289734, now seen corresponding path program 29 times [2018-10-04 12:58:36,577 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:36,578 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:36,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:36,578 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:36,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:36,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:36,830 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:58:37,041 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:37,041 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:37,041 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 [2018-10-04 12:58:37,049 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:58:37,074 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-10-04 12:58:37,074 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:37,076 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:37,138 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:37,159 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:37,159 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-04 12:58:37,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-04 12:58:37,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-04 12:58:37,160 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:37,160 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 32 states. [2018-10-04 12:58:37,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:37,208 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-10-04 12:58:37,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-04 12:58:37,209 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 32 [2018-10-04 12:58:37,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:37,209 INFO L225 Difference]: With dead ends: 36 [2018-10-04 12:58:37,210 INFO L226 Difference]: Without dead ends: 34 [2018-10-04 12:58:37,210 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.3s impTime 17 [2018-10-04 12:58:37,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-04 12:58:37,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-10-04 12:58:37,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 12:58:37,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-10-04 12:58:37,213 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-10-04 12:58:37,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:37,214 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-10-04 12:58:37,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-04 12:58:37,214 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-10-04 12:58:37,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-04 12:58:37,214 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:37,214 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1, 1] [2018-10-04 12:58:37,214 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:37,215 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:37,215 INFO L82 PathProgramCache]: Analyzing trace with hash -410989408, now seen corresponding path program 30 times [2018-10-04 12:58:37,215 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:37,215 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:37,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:37,216 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:37,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:37,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:37,837 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:58:38,100 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:38,101 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:38,101 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:58:38,110 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:58:38,133 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-10-04 12:58:38,133 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:38,135 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:38,253 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:38,274 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:38,274 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-04 12:58:38,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-04 12:58:38,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-04 12:58:38,274 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:38,275 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 33 states. [2018-10-04 12:58:38,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:38,413 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-04 12:58:38,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-04 12:58:38,413 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 33 [2018-10-04 12:58:38,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:38,414 INFO L225 Difference]: With dead ends: 37 [2018-10-04 12:58:38,414 INFO L226 Difference]: Without dead ends: 35 [2018-10-04 12:58:38,414 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.6s impTime 18 [2018-10-04 12:58:38,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-04 12:58:38,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-04 12:58:38,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-04 12:58:38,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-04 12:58:38,417 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-10-04 12:58:38,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:38,417 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-04 12:58:38,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-04 12:58:38,418 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-04 12:58:38,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-04 12:58:38,418 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:38,418 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1, 1] [2018-10-04 12:58:38,419 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:38,419 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:38,419 INFO L82 PathProgramCache]: Analyzing trace with hash 144226374, now seen corresponding path program 31 times [2018-10-04 12:58:38,419 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:38,419 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:38,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:38,420 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:38,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:38,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:38,672 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:58:38,964 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:38,965 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:38,965 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 [2018-10-04 12:58:38,973 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:58:38,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:38,995 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:39,066 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:39,086 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:39,087 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-04 12:58:39,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-04 12:58:39,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-04 12:58:39,087 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:39,088 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 34 states. [2018-10-04 12:58:39,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:39,155 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-10-04 12:58:39,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-04 12:58:39,155 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 34 [2018-10-04 12:58:39,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:39,156 INFO L225 Difference]: With dead ends: 38 [2018-10-04 12:58:39,156 INFO L226 Difference]: Without dead ends: 36 [2018-10-04 12:58:39,157 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 19 [2018-10-04 12:58:39,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-04 12:58:39,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-10-04 12:58:39,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-04 12:58:39,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-10-04 12:58:39,161 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-10-04 12:58:39,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:39,161 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-10-04 12:58:39,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-04 12:58:39,161 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-10-04 12:58:39,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-04 12:58:39,162 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:39,162 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1, 1] [2018-10-04 12:58:39,162 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:39,162 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:39,162 INFO L82 PathProgramCache]: Analyzing trace with hash 176046432, now seen corresponding path program 32 times [2018-10-04 12:58:39,162 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:39,163 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:39,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:39,163 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:58:39,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:39,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:39,456 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:58:39,637 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:39,638 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:39,638 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:58:39,645 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:58:39,665 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:58:39,665 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:39,666 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:39,742 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:39,763 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:39,763 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-04 12:58:39,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-04 12:58:39,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-04 12:58:39,764 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:39,764 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 35 states. [2018-10-04 12:58:39,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:39,804 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-10-04 12:58:39,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-04 12:58:39,804 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 35 [2018-10-04 12:58:39,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:39,805 INFO L225 Difference]: With dead ends: 39 [2018-10-04 12:58:39,805 INFO L226 Difference]: Without dead ends: 37 [2018-10-04 12:58:39,805 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 20 [2018-10-04 12:58:39,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-04 12:58:39,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-04 12:58:39,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-04 12:58:39,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-10-04 12:58:39,809 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-10-04 12:58:39,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:39,809 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-10-04 12:58:39,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-04 12:58:39,809 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-10-04 12:58:39,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-04 12:58:39,810 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:39,810 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1, 1] [2018-10-04 12:58:39,810 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:39,810 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:39,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1162468230, now seen corresponding path program 33 times [2018-10-04 12:58:39,810 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:39,811 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:39,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:39,811 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:39,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:39,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:40,141 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:58:40,514 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:40,515 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:40,515 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 [2018-10-04 12:58:40,523 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:58:40,551 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-04 12:58:40,551 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:40,553 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:40,678 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:40,697 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:40,698 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-04 12:58:40,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-04 12:58:40,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-04 12:58:40,698 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:40,698 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 36 states. [2018-10-04 12:58:40,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:40,753 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-10-04 12:58:40,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-04 12:58:40,754 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 36 [2018-10-04 12:58:40,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:40,755 INFO L225 Difference]: With dead ends: 40 [2018-10-04 12:58:40,755 INFO L226 Difference]: Without dead ends: 38 [2018-10-04 12:58:40,755 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.5s impTime 21 [2018-10-04 12:58:40,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-04 12:58:40,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-10-04 12:58:40,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-04 12:58:40,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-10-04 12:58:40,758 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-10-04 12:58:40,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:40,758 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-10-04 12:58:40,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-04 12:58:40,758 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-10-04 12:58:40,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-04 12:58:40,758 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:40,759 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1, 1] [2018-10-04 12:58:40,759 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:40,759 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:40,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1676772896, now seen corresponding path program 34 times [2018-10-04 12:58:40,759 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:40,759 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:40,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:40,760 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:40,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:40,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:41,020 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:58:41,205 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:58:41,208 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:41,208 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:41,208 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:58:41,216 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:58:41,254 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:58:41,255 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:41,256 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:41,349 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:41,371 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:41,371 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-04 12:58:41,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-04 12:58:41,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-04 12:58:41,372 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:41,372 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 37 states. [2018-10-04 12:58:41,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:41,419 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-10-04 12:58:41,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-04 12:58:41,419 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 37 [2018-10-04 12:58:41,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:41,420 INFO L225 Difference]: With dead ends: 41 [2018-10-04 12:58:41,420 INFO L226 Difference]: Without dead ends: 39 [2018-10-04 12:58:41,420 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 7 [2018-10-04 12:58:41,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-04 12:58:41,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-04 12:58:41,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-04 12:58:41,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-10-04 12:58:41,425 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-10-04 12:58:41,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:41,426 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-10-04 12:58:41,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-04 12:58:41,426 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-10-04 12:58:41,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-04 12:58:41,426 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:41,426 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1, 1] [2018-10-04 12:58:41,427 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:41,427 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:41,427 INFO L82 PathProgramCache]: Analyzing trace with hash 440348358, now seen corresponding path program 35 times [2018-10-04 12:58:41,427 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:41,427 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:41,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:41,428 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:41,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:41,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:41,620 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:58:42,030 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:58:42,065 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:42,066 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:42,066 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:58:42,074 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:58:42,098 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-04 12:58:42,098 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:42,100 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:42,187 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:42,208 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:42,208 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-04 12:58:42,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-04 12:58:42,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-04 12:58:42,208 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:42,209 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 38 states. [2018-10-04 12:58:42,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:42,287 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-10-04 12:58:42,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-04 12:58:42,287 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 38 [2018-10-04 12:58:42,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:42,288 INFO L225 Difference]: With dead ends: 42 [2018-10-04 12:58:42,288 INFO L226 Difference]: Without dead ends: 40 [2018-10-04 12:58:42,288 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.4s impTime 8 [2018-10-04 12:58:42,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-04 12:58:42,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-10-04 12:58:42,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-04 12:58:42,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-10-04 12:58:42,291 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-10-04 12:58:42,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:42,292 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-10-04 12:58:42,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-04 12:58:42,292 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-10-04 12:58:42,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-04 12:58:42,292 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:42,292 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1, 1] [2018-10-04 12:58:42,292 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:42,292 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:42,293 INFO L82 PathProgramCache]: Analyzing trace with hash 765893344, now seen corresponding path program 36 times [2018-10-04 12:58:42,293 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:42,293 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:42,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:42,293 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:42,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:42,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:42,539 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:58:43,268 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:58:43,441 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:43,441 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:43,441 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 [2018-10-04 12:58:43,448 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:58:43,478 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-04 12:58:43,478 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:43,479 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:44,525 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:44,556 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:44,556 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-04 12:58:44,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-04 12:58:44,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-04 12:58:44,557 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:44,557 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 39 states. [2018-10-04 12:58:44,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:44,712 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-04 12:58:44,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-04 12:58:44,713 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 39 [2018-10-04 12:58:44,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:44,714 INFO L225 Difference]: With dead ends: 43 [2018-10-04 12:58:44,714 INFO L226 Difference]: Without dead ends: 41 [2018-10-04 12:58:44,714 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time 0.8s impTime 9 [2018-10-04 12:58:44,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-04 12:58:44,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-04 12:58:44,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-04 12:58:44,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-10-04 12:58:44,716 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-10-04 12:58:44,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:44,716 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-10-04 12:58:44,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-04 12:58:44,716 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-10-04 12:58:44,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-04 12:58:44,717 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:44,717 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1, 1] [2018-10-04 12:58:44,717 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:44,717 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:44,717 INFO L82 PathProgramCache]: Analyzing trace with hash -2027113978, now seen corresponding path program 37 times [2018-10-04 12:58:44,717 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:44,717 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:44,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:44,718 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:44,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:44,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:44,929 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:58:45,362 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:58:45,479 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:45,479 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:45,479 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 [2018-10-04 12:58:45,486 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:58:45,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:45,528 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:45,636 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:45,655 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:45,655 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-04 12:58:45,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-04 12:58:45,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-04 12:58:45,656 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:45,656 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 40 states. [2018-10-04 12:58:45,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:45,779 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-10-04 12:58:45,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-04 12:58:45,780 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 40 [2018-10-04 12:58:45,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:45,781 INFO L225 Difference]: With dead ends: 44 [2018-10-04 12:58:45,781 INFO L226 Difference]: Without dead ends: 42 [2018-10-04 12:58:45,781 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.5s impTime 10 [2018-10-04 12:58:45,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-04 12:58:45,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-10-04 12:58:45,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-04 12:58:45,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-10-04 12:58:45,785 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-10-04 12:58:45,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:45,785 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-10-04 12:58:45,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-04 12:58:45,785 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-10-04 12:58:45,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-04 12:58:45,786 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:45,786 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1, 1] [2018-10-04 12:58:45,786 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:45,786 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:45,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1583972256, now seen corresponding path program 38 times [2018-10-04 12:58:45,787 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:45,787 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:45,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:45,788 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:58:45,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:45,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:46,164 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:58:46,397 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:58:46,449 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:46,450 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:46,450 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 [2018-10-04 12:58:46,458 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:58:46,483 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:58:46,483 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:46,485 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:46,552 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:46,572 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:46,573 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-04 12:58:46,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-04 12:58:46,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-04 12:58:46,573 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:46,573 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 41 states. [2018-10-04 12:58:46,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:46,666 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-10-04 12:58:46,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-04 12:58:46,666 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 41 [2018-10-04 12:58:46,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:46,667 INFO L225 Difference]: With dead ends: 45 [2018-10-04 12:58:46,667 INFO L226 Difference]: Without dead ends: 43 [2018-10-04 12:58:46,668 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.4s impTime 11 [2018-10-04 12:58:46,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-04 12:58:46,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-04 12:58:46,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-04 12:58:46,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-10-04 12:58:46,671 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-10-04 12:58:46,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:46,671 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-10-04 12:58:46,671 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-04 12:58:46,672 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-10-04 12:58:46,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-04 12:58:46,672 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:46,672 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1, 1] [2018-10-04 12:58:46,672 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:46,672 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:46,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1858495814, now seen corresponding path program 39 times [2018-10-04 12:58:46,673 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:46,673 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:46,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:46,673 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:46,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:46,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:47,396 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:58:47,928 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:58:48,196 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:48,196 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:48,197 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:58:48,206 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:58:48,238 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-10-04 12:58:48,238 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:48,239 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:48,311 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:48,331 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:48,331 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-04 12:58:48,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-04 12:58:48,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-04 12:58:48,332 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:48,332 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 42 states. [2018-10-04 12:58:48,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:48,398 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-10-04 12:58:48,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-04 12:58:48,398 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 42 [2018-10-04 12:58:48,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:48,399 INFO L225 Difference]: With dead ends: 46 [2018-10-04 12:58:48,399 INFO L226 Difference]: Without dead ends: 44 [2018-10-04 12:58:48,399 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.2s impTime 12 [2018-10-04 12:58:48,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-04 12:58:48,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-10-04 12:58:48,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-04 12:58:48,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-10-04 12:58:48,402 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-10-04 12:58:48,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:48,402 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-10-04 12:58:48,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-04 12:58:48,402 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-10-04 12:58:48,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-04 12:58:48,403 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:48,403 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1, 1] [2018-10-04 12:58:48,403 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:48,403 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:48,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1778791520, now seen corresponding path program 40 times [2018-10-04 12:58:48,403 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:48,403 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:48,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:48,404 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:48,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:48,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:48,772 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:58:49,626 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:58:49,803 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:49,803 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:49,804 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:58:49,811 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:58:49,837 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:58:49,837 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:49,839 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:49,928 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:49,950 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:49,950 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-04 12:58:49,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-04 12:58:49,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-04 12:58:49,950 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:49,950 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 43 states. [2018-10-04 12:58:50,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:50,023 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-10-04 12:58:50,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-04 12:58:50,023 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 43 [2018-10-04 12:58:50,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:50,024 INFO L225 Difference]: With dead ends: 47 [2018-10-04 12:58:50,024 INFO L226 Difference]: Without dead ends: 45 [2018-10-04 12:58:50,025 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 0.7s impTime 13 [2018-10-04 12:58:50,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-04 12:58:50,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-04 12:58:50,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-04 12:58:50,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-10-04 12:58:50,027 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-10-04 12:58:50,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:50,027 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-10-04 12:58:50,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-04 12:58:50,028 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-10-04 12:58:50,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-04 12:58:50,028 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:50,028 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1, 1] [2018-10-04 12:58:50,028 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:50,029 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:50,029 INFO L82 PathProgramCache]: Analyzing trace with hash -692041594, now seen corresponding path program 41 times [2018-10-04 12:58:50,029 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:50,029 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:50,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:50,030 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:50,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:50,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:50,784 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:58:51,161 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:58:51,424 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:51,425 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:51,425 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:58:51,432 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:58:51,469 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-10-04 12:58:51,469 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:51,471 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:51,555 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:51,577 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:51,578 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-04 12:58:51,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-04 12:58:51,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-04 12:58:51,578 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:51,579 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 44 states. [2018-10-04 12:58:51,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:51,733 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-10-04 12:58:51,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-04 12:58:51,734 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 44 [2018-10-04 12:58:51,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:51,734 INFO L225 Difference]: With dead ends: 48 [2018-10-04 12:58:51,734 INFO L226 Difference]: Without dead ends: 46 [2018-10-04 12:58:51,735 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 1.0s impTime 14 [2018-10-04 12:58:51,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-04 12:58:51,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-10-04 12:58:51,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-04 12:58:51,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-10-04 12:58:51,737 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-10-04 12:58:51,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:51,737 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-10-04 12:58:51,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-04 12:58:51,738 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-10-04 12:58:51,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-10-04 12:58:51,738 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:51,738 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1, 1] [2018-10-04 12:58:51,739 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:51,739 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:51,739 INFO L82 PathProgramCache]: Analyzing trace with hash 21543200, now seen corresponding path program 42 times [2018-10-04 12:58:51,739 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:51,739 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:51,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:51,740 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:51,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:51,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:52,113 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:58:52,550 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:58:52,905 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:52,905 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:52,905 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 [2018-10-04 12:58:52,912 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:58:52,947 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-10-04 12:58:52,947 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:52,949 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:53,109 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:53,140 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:53,140 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-04 12:58:53,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-04 12:58:53,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-04 12:58:53,141 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:53,141 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 45 states. [2018-10-04 12:58:53,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:53,258 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-10-04 12:58:53,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-04 12:58:53,259 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 45 [2018-10-04 12:58:53,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:53,259 INFO L225 Difference]: With dead ends: 49 [2018-10-04 12:58:53,259 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 12:58:53,260 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.9s impTime 15 [2018-10-04 12:58:53,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 12:58:53,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-04 12:58:53,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-04 12:58:53,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-10-04 12:58:53,262 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-10-04 12:58:53,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:53,262 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-10-04 12:58:53,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-04 12:58:53,262 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-10-04 12:58:53,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-04 12:58:53,263 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:53,263 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1, 1] [2018-10-04 12:58:53,263 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:53,264 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:53,264 INFO L82 PathProgramCache]: Analyzing trace with hash 667835334, now seen corresponding path program 43 times [2018-10-04 12:58:53,264 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:53,264 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:53,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:53,265 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:53,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:53,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:53,549 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:58:54,370 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:58:54,695 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:54,695 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:54,695 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-04 12:58:54,703 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:58:54,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:54,732 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:54,810 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:54,829 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:54,829 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-04 12:58:54,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-04 12:58:54,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-04 12:58:54,830 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:54,830 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 46 states. [2018-10-04 12:58:54,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:54,961 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-10-04 12:58:54,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-04 12:58:54,961 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 46 [2018-10-04 12:58:54,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:54,962 INFO L225 Difference]: With dead ends: 50 [2018-10-04 12:58:54,962 INFO L226 Difference]: Without dead ends: 48 [2018-10-04 12:58:54,962 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 0.8s impTime 16 [2018-10-04 12:58:54,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-04 12:58:54,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-10-04 12:58:54,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-04 12:58:54,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-10-04 12:58:54,965 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-10-04 12:58:54,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:54,966 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-10-04 12:58:54,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-04 12:58:54,966 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-10-04 12:58:54,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-04 12:58:54,966 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:54,966 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1, 1] [2018-10-04 12:58:54,967 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:54,967 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:54,967 INFO L82 PathProgramCache]: Analyzing trace with hash -771944992, now seen corresponding path program 44 times [2018-10-04 12:58:54,967 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:54,967 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:54,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:54,968 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:58:54,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:54,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:55,210 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:58:55,584 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:58:55,951 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:55,951 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:55,952 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 [2018-10-04 12:58:55,959 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:58:55,984 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:58:55,984 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:55,985 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:56,064 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:56,084 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:56,084 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-04 12:58:56,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-04 12:58:56,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-04 12:58:56,085 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:56,085 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 47 states. [2018-10-04 12:58:56,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:56,163 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-10-04 12:58:56,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-04 12:58:56,163 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 47 [2018-10-04 12:58:56,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:56,164 INFO L225 Difference]: With dead ends: 51 [2018-10-04 12:58:56,164 INFO L226 Difference]: Without dead ends: 49 [2018-10-04 12:58:56,165 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.8s impTime 17 [2018-10-04 12:58:56,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-04 12:58:56,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-04 12:58:56,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-04 12:58:56,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-10-04 12:58:56,167 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-10-04 12:58:56,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:56,168 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-10-04 12:58:56,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-04 12:58:56,168 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-10-04 12:58:56,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-04 12:58:56,168 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:56,168 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1, 1] [2018-10-04 12:58:56,169 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:56,169 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:56,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1839505158, now seen corresponding path program 45 times [2018-10-04 12:58:56,169 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:56,169 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:56,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:56,170 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:56,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:56,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:56,438 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:58:57,086 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:58:57,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:57,212 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:57,212 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:58:57,220 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:58:57,256 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-10-04 12:58:57,256 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:57,258 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:57,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:57,382 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:57,383 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-04 12:58:57,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-04 12:58:57,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-04 12:58:57,383 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:57,383 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 48 states. [2018-10-04 12:58:57,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:57,832 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-10-04 12:58:57,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-04 12:58:57,832 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 48 [2018-10-04 12:58:57,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:57,833 INFO L225 Difference]: With dead ends: 52 [2018-10-04 12:58:57,833 INFO L226 Difference]: Without dead ends: 50 [2018-10-04 12:58:57,833 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.6s impTime 18 [2018-10-04 12:58:57,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-04 12:58:57,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-10-04 12:58:57,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-04 12:58:57,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-10-04 12:58:57,836 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-10-04 12:58:57,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:57,836 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-10-04 12:58:57,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-04 12:58:57,837 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-10-04 12:58:57,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-04 12:58:57,837 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:57,837 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1, 1] [2018-10-04 12:58:57,837 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:57,838 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:57,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1190081184, now seen corresponding path program 46 times [2018-10-04 12:58:57,838 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:57,838 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:57,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:57,839 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:57,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:57,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:58,362 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:58:58,760 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:58:59,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:59,191 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:58:59,191 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:58:59,199 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:58:59,228 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:58:59,228 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:59,230 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:59,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:59,361 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:58:59,361 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-10-04 12:58:59,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-04 12:58:59,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-04 12:58:59,362 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:59,362 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 49 states. [2018-10-04 12:58:59,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:59,442 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-10-04 12:58:59,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-04 12:58:59,442 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 49 [2018-10-04 12:58:59,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:59,443 INFO L225 Difference]: With dead ends: 53 [2018-10-04 12:58:59,444 INFO L226 Difference]: Without dead ends: 51 [2018-10-04 12:58:59,444 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 1.0s impTime 19 [2018-10-04 12:58:59,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-04 12:58:59,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-04 12:58:59,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-04 12:58:59,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-10-04 12:58:59,446 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-10-04 12:58:59,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:59,447 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-10-04 12:58:59,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-04 12:58:59,447 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-10-04 12:58:59,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-04 12:58:59,447 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:59,447 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1, 1] [2018-10-04 12:58:59,447 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:58:59,448 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:59,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1762192826, now seen corresponding path program 47 times [2018-10-04 12:58:59,448 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:59,448 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:59,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:59,449 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:59,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:59,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:59,879 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:59:00,140 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:59:00,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:00,345 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:00,345 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:00,352 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:59:00,390 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-10-04 12:59:00,390 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:00,392 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:00,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:00,504 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:00,504 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-04 12:59:00,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-04 12:59:00,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-04 12:59:00,505 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:00,505 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 50 states. [2018-10-04 12:59:00,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:00,570 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-10-04 12:59:00,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-04 12:59:00,576 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 50 [2018-10-04 12:59:00,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:00,576 INFO L225 Difference]: With dead ends: 54 [2018-10-04 12:59:00,577 INFO L226 Difference]: Without dead ends: 52 [2018-10-04 12:59:00,577 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.6s impTime 20 [2018-10-04 12:59:00,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-10-04 12:59:00,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-10-04 12:59:00,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-04 12:59:00,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-10-04 12:59:00,579 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-10-04 12:59:00,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:00,579 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-10-04 12:59:00,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-04 12:59:00,579 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-10-04 12:59:00,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-04 12:59:00,580 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:00,580 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1, 1] [2018-10-04 12:59:00,580 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:00,580 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:00,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1206593376, now seen corresponding path program 48 times [2018-10-04 12:59:00,581 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:00,581 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:00,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:00,581 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:00,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:00,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:00,766 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:59:01,164 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:59:01,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:01,397 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:01,398 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:01,406 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:59:01,445 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-04 12:59:01,445 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:01,447 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:01,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:01,560 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:01,561 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-04 12:59:01,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-04 12:59:01,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-04 12:59:01,561 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:01,561 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 51 states. [2018-10-04 12:59:01,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:01,625 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-10-04 12:59:01,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-04 12:59:01,625 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 51 [2018-10-04 12:59:01,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:01,626 INFO L225 Difference]: With dead ends: 55 [2018-10-04 12:59:01,626 INFO L226 Difference]: Without dead ends: 53 [2018-10-04 12:59:01,627 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.6s impTime 21 [2018-10-04 12:59:01,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-04 12:59:01,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-04 12:59:01,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-04 12:59:01,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-10-04 12:59:01,629 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-10-04 12:59:01,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:01,630 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-10-04 12:59:01,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-04 12:59:01,630 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-10-04 12:59:01,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-04 12:59:01,630 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:01,630 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1, 1] [2018-10-04 12:59:01,630 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:01,631 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:01,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1250314874, now seen corresponding path program 49 times [2018-10-04 12:59:01,631 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:01,631 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:01,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:01,631 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:01,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:01,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:02,699 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:59:03,108 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:59:03,663 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:59:03,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:03,667 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:03,668 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:03,675 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:59:03,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:03,704 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:03,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:03,803 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:03,803 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-04 12:59:03,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-04 12:59:03,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-04 12:59:03,804 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:03,804 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 52 states. [2018-10-04 12:59:03,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:03,865 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-10-04 12:59:03,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-04 12:59:03,866 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 52 [2018-10-04 12:59:03,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:03,866 INFO L225 Difference]: With dead ends: 56 [2018-10-04 12:59:03,866 INFO L226 Difference]: Without dead ends: 54 [2018-10-04 12:59:03,867 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time 1.6s impTime 7 [2018-10-04 12:59:03,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-04 12:59:03,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-10-04 12:59:03,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-04 12:59:03,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-10-04 12:59:03,870 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-10-04 12:59:03,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:03,870 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-10-04 12:59:03,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-04 12:59:03,870 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-10-04 12:59:03,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-04 12:59:03,870 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:03,871 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1, 1] [2018-10-04 12:59:03,871 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:03,871 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:03,871 INFO L82 PathProgramCache]: Analyzing trace with hash -105059296, now seen corresponding path program 50 times [2018-10-04 12:59:03,871 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:03,871 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:03,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:03,872 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:59:03,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:03,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:04,106 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:59:04,512 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:59:04,735 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:59:04,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:04,753 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:04,753 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:04,761 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:59:04,800 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:59:04,800 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:04,802 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:04,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:04,934 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:04,935 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-04 12:59:04,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-04 12:59:04,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-04 12:59:04,935 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:04,935 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 53 states. [2018-10-04 12:59:05,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:05,023 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-10-04 12:59:05,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-04 12:59:05,023 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 53 [2018-10-04 12:59:05,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:05,024 INFO L225 Difference]: With dead ends: 57 [2018-10-04 12:59:05,024 INFO L226 Difference]: Without dead ends: 55 [2018-10-04 12:59:05,024 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.6s impTime 8 [2018-10-04 12:59:05,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-04 12:59:05,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-10-04 12:59:05,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-04 12:59:05,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-10-04 12:59:05,026 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-10-04 12:59:05,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:05,026 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-10-04 12:59:05,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-04 12:59:05,027 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-10-04 12:59:05,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-04 12:59:05,027 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:05,027 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1, 1] [2018-10-04 12:59:05,027 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:05,028 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:05,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1038125254, now seen corresponding path program 51 times [2018-10-04 12:59:05,028 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:05,028 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:05,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:05,029 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:05,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:05,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:05,280 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:59:05,464 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:59:05,816 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:59:05,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:05,875 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:05,875 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:05,883 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:59:06,053 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-10-04 12:59:06,053 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:06,055 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:06,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:06,207 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:06,207 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-04 12:59:06,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-04 12:59:06,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-04 12:59:06,208 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:06,208 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 54 states. [2018-10-04 12:59:06,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:06,282 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-10-04 12:59:06,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-04 12:59:06,282 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 54 [2018-10-04 12:59:06,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:06,283 INFO L225 Difference]: With dead ends: 58 [2018-10-04 12:59:06,283 INFO L226 Difference]: Without dead ends: 56 [2018-10-04 12:59:06,283 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.6s impTime 9 [2018-10-04 12:59:06,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-04 12:59:06,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-10-04 12:59:06,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-04 12:59:06,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-10-04 12:59:06,286 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-10-04 12:59:06,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:06,286 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-10-04 12:59:06,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-04 12:59:06,287 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-10-04 12:59:06,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-04 12:59:06,287 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:06,287 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1, 1] [2018-10-04 12:59:06,287 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:06,287 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:06,288 INFO L82 PathProgramCache]: Analyzing trace with hash 2117107936, now seen corresponding path program 52 times [2018-10-04 12:59:06,288 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:06,288 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:06,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:06,288 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:06,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:06,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:06,572 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:59:06,996 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:59:07,668 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:59:07,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:07,811 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:07,811 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:07,819 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:59:07,850 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:59:07,850 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:07,853 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:07,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:07,997 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:07,998 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-04 12:59:07,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-04 12:59:07,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-04 12:59:07,998 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:07,998 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 55 states. [2018-10-04 12:59:08,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:08,090 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-10-04 12:59:08,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-04 12:59:08,091 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 55 [2018-10-04 12:59:08,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:08,092 INFO L225 Difference]: With dead ends: 59 [2018-10-04 12:59:08,092 INFO L226 Difference]: Without dead ends: 57 [2018-10-04 12:59:08,092 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.2s impTime 10 [2018-10-04 12:59:08,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-04 12:59:08,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-04 12:59:08,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-04 12:59:08,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-10-04 12:59:08,095 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-10-04 12:59:08,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:08,095 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-10-04 12:59:08,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-04 12:59:08,096 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-10-04 12:59:08,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-04 12:59:08,096 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:08,096 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1, 1] [2018-10-04 12:59:08,096 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:08,097 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:08,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1205832710, now seen corresponding path program 53 times [2018-10-04 12:59:08,097 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:08,097 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:08,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:08,098 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:08,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:08,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:08,419 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:59:08,619 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:59:08,986 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:59:09,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:09,175 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:09,176 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:09,183 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:59:09,222 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-10-04 12:59:09,222 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:09,225 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:09,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:09,381 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:09,381 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-04 12:59:09,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-04 12:59:09,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-04 12:59:09,382 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:09,382 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 56 states. [2018-10-04 12:59:09,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:09,472 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-10-04 12:59:09,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-04 12:59:09,472 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 56 [2018-10-04 12:59:09,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:09,473 INFO L225 Difference]: With dead ends: 60 [2018-10-04 12:59:09,473 INFO L226 Difference]: Without dead ends: 58 [2018-10-04 12:59:09,473 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.8s impTime 11 [2018-10-04 12:59:09,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-10-04 12:59:09,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-10-04 12:59:09,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-04 12:59:09,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-10-04 12:59:09,475 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-10-04 12:59:09,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:09,475 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-10-04 12:59:09,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-04 12:59:09,475 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-10-04 12:59:09,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-04 12:59:09,476 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:09,476 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1, 1] [2018-10-04 12:59:09,476 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:09,476 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:09,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1273895520, now seen corresponding path program 54 times [2018-10-04 12:59:09,477 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:09,477 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:09,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:09,477 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:09,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:09,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:09,695 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:59:10,087 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:59:10,410 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:59:10,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:10,472 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:10,472 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:10,479 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:59:10,520 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-10-04 12:59:10,520 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:10,522 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:10,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:10,740 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:10,741 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-10-04 12:59:10,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-04 12:59:10,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-04 12:59:10,741 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:10,741 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 57 states. [2018-10-04 12:59:10,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:10,811 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-10-04 12:59:10,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-04 12:59:10,812 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 57 [2018-10-04 12:59:10,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:10,812 INFO L225 Difference]: With dead ends: 61 [2018-10-04 12:59:10,813 INFO L226 Difference]: Without dead ends: 59 [2018-10-04 12:59:10,813 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.7s impTime 12 [2018-10-04 12:59:10,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-04 12:59:10,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-04 12:59:10,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-04 12:59:10,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-10-04 12:59:10,815 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-10-04 12:59:10,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:10,816 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-10-04 12:59:10,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-04 12:59:10,816 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-10-04 12:59:10,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-04 12:59:10,816 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:10,817 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1, 1] [2018-10-04 12:59:10,817 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:10,817 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:10,817 INFO L82 PathProgramCache]: Analyzing trace with hash -836059322, now seen corresponding path program 55 times [2018-10-04 12:59:10,817 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:10,817 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:10,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:10,818 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:10,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:10,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:11,267 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:59:11,632 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:59:12,238 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:59:12,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:12,536 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:12,536 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:12,543 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:59:12,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:12,580 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:12,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:12,720 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:12,720 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-04 12:59:12,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-04 12:59:12,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-04 12:59:12,721 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:12,721 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 58 states. [2018-10-04 12:59:12,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:12,835 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-10-04 12:59:12,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-04 12:59:12,836 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 58 [2018-10-04 12:59:12,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:12,837 INFO L225 Difference]: With dead ends: 62 [2018-10-04 12:59:12,837 INFO L226 Difference]: Without dead ends: 60 [2018-10-04 12:59:12,837 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 1.4s impTime 13 [2018-10-04 12:59:12,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-04 12:59:12,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-10-04 12:59:12,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-04 12:59:12,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-10-04 12:59:12,840 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-10-04 12:59:12,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:12,841 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-10-04 12:59:12,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-04 12:59:12,841 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-10-04 12:59:12,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-10-04 12:59:12,841 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:12,842 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1, 1] [2018-10-04 12:59:12,842 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:12,842 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:12,842 INFO L82 PathProgramCache]: Analyzing trace with hash -148039072, now seen corresponding path program 56 times [2018-10-04 12:59:12,842 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:12,842 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:12,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:12,843 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:59:12,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:12,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:13,083 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:59:13,666 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:59:14,203 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:59:14,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:14,259 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:14,259 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:14,266 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:59:14,300 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:59:14,300 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:14,302 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:14,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:14,619 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:14,620 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-10-04 12:59:14,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-04 12:59:14,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-04 12:59:14,620 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:14,620 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 59 states. [2018-10-04 12:59:14,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:14,693 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-10-04 12:59:14,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-04 12:59:14,694 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 59 [2018-10-04 12:59:14,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:14,694 INFO L225 Difference]: With dead ends: 63 [2018-10-04 12:59:14,695 INFO L226 Difference]: Without dead ends: 61 [2018-10-04 12:59:14,695 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 1.1s impTime 14 [2018-10-04 12:59:14,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-04 12:59:14,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-04 12:59:14,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-04 12:59:14,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-10-04 12:59:14,696 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-10-04 12:59:14,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:14,697 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-10-04 12:59:14,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-04 12:59:14,697 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-10-04 12:59:14,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-04 12:59:14,697 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:14,697 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1, 1] [2018-10-04 12:59:14,697 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:14,697 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:14,698 INFO L82 PathProgramCache]: Analyzing trace with hash -294247802, now seen corresponding path program 57 times [2018-10-04 12:59:14,698 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:14,698 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:14,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:14,698 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:14,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:14,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:15,253 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:59:15,665 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:59:15,943 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:59:16,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:16,331 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:16,331 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:16,339 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:59:16,386 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-10-04 12:59:16,387 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:16,389 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:16,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:16,776 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:16,776 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-10-04 12:59:16,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-04 12:59:16,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-04 12:59:16,777 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:16,777 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 60 states. [2018-10-04 12:59:16,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:16,871 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-10-04 12:59:16,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-04 12:59:16,872 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 60 [2018-10-04 12:59:16,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:16,873 INFO L225 Difference]: With dead ends: 64 [2018-10-04 12:59:16,873 INFO L226 Difference]: Without dead ends: 62 [2018-10-04 12:59:16,873 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time 1.3s impTime 15 [2018-10-04 12:59:16,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-10-04 12:59:16,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-10-04 12:59:16,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-04 12:59:16,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-10-04 12:59:16,876 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-10-04 12:59:16,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:16,877 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-10-04 12:59:16,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-04 12:59:16,877 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-10-04 12:59:16,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-04 12:59:16,877 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:16,877 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1, 1] [2018-10-04 12:59:16,878 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:16,878 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:16,878 INFO L82 PathProgramCache]: Analyzing trace with hash -531751136, now seen corresponding path program 58 times [2018-10-04 12:59:16,878 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:16,878 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:16,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:16,879 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:16,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:16,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:17,214 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:59:17,458 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:59:17,891 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:59:18,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:18,230 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:18,230 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:18,238 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:59:18,274 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:59:18,274 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:18,276 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:18,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:18,428 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:18,428 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-10-04 12:59:18,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-04 12:59:18,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-04 12:59:18,429 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:18,429 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 61 states. [2018-10-04 12:59:18,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:18,586 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-10-04 12:59:18,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-04 12:59:18,586 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 61 [2018-10-04 12:59:18,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:18,586 INFO L225 Difference]: With dead ends: 65 [2018-10-04 12:59:18,586 INFO L226 Difference]: Without dead ends: 63 [2018-10-04 12:59:18,587 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 1.0s impTime 16 [2018-10-04 12:59:18,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-04 12:59:18,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-10-04 12:59:18,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-04 12:59:18,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-10-04 12:59:18,590 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-10-04 12:59:18,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:18,590 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-10-04 12:59:18,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-04 12:59:18,590 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-10-04 12:59:18,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-04 12:59:18,591 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:18,591 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1, 1] [2018-10-04 12:59:18,591 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:18,591 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:18,591 INFO L82 PathProgramCache]: Analyzing trace with hash 695580102, now seen corresponding path program 59 times [2018-10-04 12:59:18,591 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:18,591 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:18,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:18,592 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:18,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:18,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:18,868 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:59:19,244 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:59:19,709 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:59:19,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:19,814 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:19,814 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:19,823 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:59:19,872 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-10-04 12:59:19,872 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:19,875 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:20,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:20,080 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:20,081 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-10-04 12:59:20,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-04 12:59:20,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-04 12:59:20,081 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:20,081 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 62 states. [2018-10-04 12:59:20,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:20,179 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-10-04 12:59:20,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-04 12:59:20,179 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 62 [2018-10-04 12:59:20,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:20,180 INFO L225 Difference]: With dead ends: 66 [2018-10-04 12:59:20,180 INFO L226 Difference]: Without dead ends: 64 [2018-10-04 12:59:20,181 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 1.0s impTime 17 [2018-10-04 12:59:20,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-10-04 12:59:20,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-10-04 12:59:20,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-04 12:59:20,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-10-04 12:59:20,183 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-10-04 12:59:20,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:20,183 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-10-04 12:59:20,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-04 12:59:20,184 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-10-04 12:59:20,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-04 12:59:20,184 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:20,184 INFO L375 BasicCegarLoop]: trace histogram [60, 1, 1, 1] [2018-10-04 12:59:20,184 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:20,184 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:20,185 INFO L82 PathProgramCache]: Analyzing trace with hash 88142816, now seen corresponding path program 60 times [2018-10-04 12:59:20,185 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:20,185 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:20,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:20,185 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:20,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:20,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:21,950 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:59:22,322 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:59:22,892 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:59:23,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:23,444 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:23,444 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:23,452 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:59:23,500 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-04 12:59:23,501 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:23,503 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:23,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:23,683 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:23,683 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-10-04 12:59:23,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-04 12:59:23,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-04 12:59:23,684 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:23,684 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 63 states. [2018-10-04 12:59:23,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:23,865 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-10-04 12:59:23,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-04 12:59:23,866 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 63 [2018-10-04 12:59:23,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:23,866 INFO L225 Difference]: With dead ends: 67 [2018-10-04 12:59:23,866 INFO L226 Difference]: Without dead ends: 65 [2018-10-04 12:59:23,867 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s Time 2.6s impTime 18 [2018-10-04 12:59:23,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-04 12:59:23,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-10-04 12:59:23,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-04 12:59:23,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-10-04 12:59:23,869 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-10-04 12:59:23,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:23,870 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-10-04 12:59:23,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-04 12:59:23,870 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-10-04 12:59:23,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-04 12:59:23,870 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:23,870 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1, 1] [2018-10-04 12:59:23,870 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:23,871 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:23,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1562543866, now seen corresponding path program 61 times [2018-10-04 12:59:23,871 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:23,871 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:23,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:23,871 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:23,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:23,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:24,073 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:59:24,282 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:59:24,731 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:59:25,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:25,339 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:25,339 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:25,346 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:59:25,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:25,380 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:25,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:25,514 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:25,514 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-10-04 12:59:25,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-04 12:59:25,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-04 12:59:25,515 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:25,515 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 64 states. [2018-10-04 12:59:25,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:25,627 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-10-04 12:59:25,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-04 12:59:25,627 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 64 [2018-10-04 12:59:25,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:25,628 INFO L225 Difference]: With dead ends: 68 [2018-10-04 12:59:25,628 INFO L226 Difference]: Without dead ends: 66 [2018-10-04 12:59:25,629 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.2s impTime 19 [2018-10-04 12:59:25,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-04 12:59:25,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-10-04 12:59:25,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-04 12:59:25,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-10-04 12:59:25,631 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-10-04 12:59:25,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:25,631 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-10-04 12:59:25,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-04 12:59:25,631 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-10-04 12:59:25,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-04 12:59:25,632 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:25,632 INFO L375 BasicCegarLoop]: trace histogram [62, 1, 1, 1] [2018-10-04 12:59:25,632 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:25,632 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:25,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1194223456, now seen corresponding path program 62 times [2018-10-04 12:59:25,632 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:25,632 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:25,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:25,633 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:59:25,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:25,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:26,488 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:59:26,670 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:59:27,098 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:59:27,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:27,800 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:27,800 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:27,808 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:59:27,841 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:59:27,841 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:27,843 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:27,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:27,985 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:27,985 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-10-04 12:59:27,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-04 12:59:27,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-04 12:59:27,986 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:27,986 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 65 states. [2018-10-04 12:59:28,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:28,143 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-10-04 12:59:28,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-04 12:59:28,143 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 65 [2018-10-04 12:59:28,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:28,144 INFO L225 Difference]: With dead ends: 69 [2018-10-04 12:59:28,144 INFO L226 Difference]: Without dead ends: 67 [2018-10-04 12:59:28,144 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time 1.7s impTime 20 [2018-10-04 12:59:28,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-04 12:59:28,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-10-04 12:59:28,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-04 12:59:28,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-10-04 12:59:28,146 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-10-04 12:59:28,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:28,146 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-10-04 12:59:28,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-04 12:59:28,146 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-10-04 12:59:28,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-04 12:59:28,146 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:28,147 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1, 1] [2018-10-04 12:59:28,147 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:28,147 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:28,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1633774662, now seen corresponding path program 63 times [2018-10-04 12:59:28,147 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:28,147 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:28,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:28,148 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:28,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:28,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:28,322 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:59:28,613 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:59:29,352 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:59:30,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:30,069 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:30,069 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:30,078 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:59:30,190 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-10-04 12:59:30,190 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:30,192 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:30,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:30,335 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:30,335 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-10-04 12:59:30,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-04 12:59:30,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-04 12:59:30,336 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:30,336 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 66 states. [2018-10-04 12:59:30,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:30,501 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-10-04 12:59:30,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-04 12:59:30,501 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 66 [2018-10-04 12:59:30,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:30,502 INFO L225 Difference]: With dead ends: 70 [2018-10-04 12:59:30,502 INFO L226 Difference]: Without dead ends: 68 [2018-10-04 12:59:30,503 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time 1.6s impTime 21 [2018-10-04 12:59:30,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-04 12:59:30,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-10-04 12:59:30,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-04 12:59:30,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-10-04 12:59:30,505 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-10-04 12:59:30,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:30,505 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-10-04 12:59:30,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-04 12:59:30,505 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-10-04 12:59:30,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-04 12:59:30,506 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:30,506 INFO L375 BasicCegarLoop]: trace histogram [64, 1, 1, 1] [2018-10-04 12:59:30,506 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:30,506 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:30,506 INFO L82 PathProgramCache]: Analyzing trace with hash -892596896, now seen corresponding path program 64 times [2018-10-04 12:59:30,506 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:30,507 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:30,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:30,508 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:30,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:30,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:30,765 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:59:31,189 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:59:31,795 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:59:32,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:32,143 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:32,143 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:32,158 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:59:32,207 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:59:32,208 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:32,211 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:32,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:32,351 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:32,352 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-10-04 12:59:32,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-04 12:59:32,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-04 12:59:32,352 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:32,352 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 67 states. [2018-10-04 12:59:32,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:32,440 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-10-04 12:59:32,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-04 12:59:32,440 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 67 [2018-10-04 12:59:32,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:32,441 INFO L225 Difference]: With dead ends: 71 [2018-10-04 12:59:32,441 INFO L226 Difference]: Without dead ends: 69 [2018-10-04 12:59:32,441 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 1.4s impTime 22 [2018-10-04 12:59:32,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-04 12:59:32,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-10-04 12:59:32,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-04 12:59:32,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-10-04 12:59:32,444 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-10-04 12:59:32,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:32,444 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-10-04 12:59:32,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-04 12:59:32,445 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-10-04 12:59:32,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-04 12:59:32,445 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:32,445 INFO L375 BasicCegarLoop]: trace histogram [65, 1, 1, 1] [2018-10-04 12:59:32,445 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:32,445 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:32,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1900703866, now seen corresponding path program 65 times [2018-10-04 12:59:32,446 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:32,446 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:32,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:32,446 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:32,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:32,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:32,703 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:59:32,991 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:59:33,242 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:59:33,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:33,698 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:33,698 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:33,705 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:59:33,758 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-10-04 12:59:33,759 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:33,762 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:34,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:34,075 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:34,075 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-10-04 12:59:34,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-04 12:59:34,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-04 12:59:34,076 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:34,076 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 68 states. [2018-10-04 12:59:34,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:34,324 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-10-04 12:59:34,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-04 12:59:34,325 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 68 [2018-10-04 12:59:34,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:34,326 INFO L225 Difference]: With dead ends: 72 [2018-10-04 12:59:34,326 INFO L226 Difference]: Without dead ends: 70 [2018-10-04 12:59:34,326 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 1.0s impTime 23 [2018-10-04 12:59:34,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-10-04 12:59:34,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-10-04 12:59:34,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-04 12:59:34,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-10-04 12:59:34,328 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-10-04 12:59:34,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:34,328 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-10-04 12:59:34,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-04 12:59:34,328 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-10-04 12:59:34,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-10-04 12:59:34,328 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:34,328 INFO L375 BasicCegarLoop]: trace histogram [66, 1, 1, 1] [2018-10-04 12:59:34,329 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:34,329 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:34,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1207718432, now seen corresponding path program 66 times [2018-10-04 12:59:34,329 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:34,329 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:34,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:34,329 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:34,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:34,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:34,529 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:59:34,945 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:59:35,551 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:59:36,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:36,446 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:36,446 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:36,452 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:59:36,508 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-10-04 12:59:36,508 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:36,511 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:38,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:38,127 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:38,128 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-10-04 12:59:38,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-04 12:59:38,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-04 12:59:38,128 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:38,128 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 69 states. [2018-10-04 12:59:38,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:38,247 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-10-04 12:59:38,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-04 12:59:38,247 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 69 [2018-10-04 12:59:38,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:38,248 INFO L225 Difference]: With dead ends: 73 [2018-10-04 12:59:38,248 INFO L226 Difference]: Without dead ends: 71 [2018-10-04 12:59:38,248 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s Time 1.9s impTime 24 [2018-10-04 12:59:38,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-04 12:59:38,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-10-04 12:59:38,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-04 12:59:38,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-10-04 12:59:38,250 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-10-04 12:59:38,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:38,250 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-10-04 12:59:38,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-04 12:59:38,250 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-10-04 12:59:38,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-04 12:59:38,251 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:38,251 INFO L375 BasicCegarLoop]: trace histogram [67, 1, 1, 1] [2018-10-04 12:59:38,251 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:38,251 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:38,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1215438138, now seen corresponding path program 67 times [2018-10-04 12:59:38,251 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:38,251 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:38,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:38,252 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:38,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:38,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:38,491 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:59:38,835 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:59:39,563 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:59:40,559 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:59:40,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:40,566 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:40,566 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:40,574 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:59:40,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:40,615 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:40,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:40,751 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:40,752 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-10-04 12:59:40,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-04 12:59:40,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-04 12:59:40,752 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:40,752 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 70 states. [2018-10-04 12:59:40,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:40,892 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-10-04 12:59:40,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-04 12:59:40,892 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 70 [2018-10-04 12:59:40,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:40,893 INFO L225 Difference]: With dead ends: 74 [2018-10-04 12:59:40,893 INFO L226 Difference]: Without dead ends: 72 [2018-10-04 12:59:40,893 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s Time 1.9s impTime 8 [2018-10-04 12:59:40,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-10-04 12:59:40,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-10-04 12:59:40,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-10-04 12:59:40,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-10-04 12:59:40,896 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-10-04 12:59:40,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:40,897 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-10-04 12:59:40,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-04 12:59:40,897 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-10-04 12:59:40,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-10-04 12:59:40,898 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:40,898 INFO L375 BasicCegarLoop]: trace histogram [68, 1, 1, 1] [2018-10-04 12:59:40,898 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:40,898 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:40,898 INFO L82 PathProgramCache]: Analyzing trace with hash 976119520, now seen corresponding path program 68 times [2018-10-04 12:59:40,898 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:40,898 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:40,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:40,899 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:59:40,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:40,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:41,081 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:59:41,346 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:59:41,828 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:59:42,664 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:59:42,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:42,721 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:42,721 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:42,729 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:59:42,768 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:59:42,769 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:42,771 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:42,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:42,908 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:42,908 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-10-04 12:59:42,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-04 12:59:42,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-04 12:59:42,909 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:42,909 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 71 states. [2018-10-04 12:59:43,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:43,027 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-10-04 12:59:43,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-04 12:59:43,027 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 71 [2018-10-04 12:59:43,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:43,029 INFO L225 Difference]: With dead ends: 75 [2018-10-04 12:59:43,029 INFO L226 Difference]: Without dead ends: 73 [2018-10-04 12:59:43,029 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 1.5s impTime 9 [2018-10-04 12:59:43,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-04 12:59:43,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-10-04 12:59:43,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-04 12:59:43,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-10-04 12:59:43,031 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2018-10-04 12:59:43,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:43,031 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-10-04 12:59:43,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-04 12:59:43,032 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-10-04 12:59:43,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-04 12:59:43,032 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:43,032 INFO L375 BasicCegarLoop]: trace histogram [69, 1, 1, 1] [2018-10-04 12:59:43,032 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:43,032 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:43,032 INFO L82 PathProgramCache]: Analyzing trace with hash 194930182, now seen corresponding path program 69 times [2018-10-04 12:59:43,032 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:43,033 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:43,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:43,033 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:43,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:43,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:43,208 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:59:43,524 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:59:44,061 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:59:45,212 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:59:45,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:45,342 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:45,342 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:45,349 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:59:45,409 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-10-04 12:59:45,410 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:45,412 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:45,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:45,816 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:45,816 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-10-04 12:59:45,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-04 12:59:45,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-04 12:59:45,817 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:45,817 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 72 states. [2018-10-04 12:59:45,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:45,970 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-10-04 12:59:45,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-04 12:59:45,971 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 72 [2018-10-04 12:59:45,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:45,972 INFO L225 Difference]: With dead ends: 76 [2018-10-04 12:59:45,972 INFO L226 Difference]: Without dead ends: 74 [2018-10-04 12:59:45,972 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s Time 2.0s impTime 10 [2018-10-04 12:59:45,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-04 12:59:45,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-10-04 12:59:45,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-10-04 12:59:45,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-10-04 12:59:45,974 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2018-10-04 12:59:45,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:45,975 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-10-04 12:59:45,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-04 12:59:45,975 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-10-04 12:59:45,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-10-04 12:59:45,975 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:45,976 INFO L375 BasicCegarLoop]: trace histogram [70, 1, 1, 1] [2018-10-04 12:59:45,976 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:45,976 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:45,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1747864480, now seen corresponding path program 70 times [2018-10-04 12:59:45,976 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:45,976 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:45,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:45,977 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:45,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:45,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:46,231 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:59:46,653 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:59:47,260 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:59:48,251 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:59:48,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:48,460 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:48,460 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:48,466 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:59:48,504 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:59:48,504 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:48,506 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:48,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:48,655 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:48,655 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-10-04 12:59:48,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-04 12:59:48,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-04 12:59:48,656 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:48,656 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 73 states. [2018-10-04 12:59:48,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:48,866 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-10-04 12:59:48,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-04 12:59:48,867 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 73 [2018-10-04 12:59:48,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:48,867 INFO L225 Difference]: With dead ends: 77 [2018-10-04 12:59:48,868 INFO L226 Difference]: Without dead ends: 75 [2018-10-04 12:59:48,868 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s Time 2.1s impTime 11 [2018-10-04 12:59:48,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-04 12:59:48,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-10-04 12:59:48,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-04 12:59:48,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-10-04 12:59:48,870 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2018-10-04 12:59:48,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:48,870 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-10-04 12:59:48,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-04 12:59:48,871 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-10-04 12:59:48,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-04 12:59:48,871 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:48,871 INFO L375 BasicCegarLoop]: trace histogram [71, 1, 1, 1] [2018-10-04 12:59:48,871 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:48,871 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:48,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1650779834, now seen corresponding path program 71 times [2018-10-04 12:59:48,872 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:48,872 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:48,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:48,873 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:48,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:48,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:49,097 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:59:49,708 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:59:49,890 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:59:50,362 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:59:50,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:50,504 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:50,504 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:50,512 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:59:50,580 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-10-04 12:59:50,580 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:50,583 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:50,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:50,944 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:50,944 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-10-04 12:59:50,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-04 12:59:50,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-04 12:59:50,945 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:50,945 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 74 states. [2018-10-04 12:59:51,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:51,051 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-10-04 12:59:51,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-04 12:59:51,051 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 74 [2018-10-04 12:59:51,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:51,052 INFO L225 Difference]: With dead ends: 78 [2018-10-04 12:59:51,053 INFO L226 Difference]: Without dead ends: 76 [2018-10-04 12:59:51,053 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time 1.3s impTime 12 [2018-10-04 12:59:51,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-10-04 12:59:51,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-10-04 12:59:51,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-04 12:59:51,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-10-04 12:59:51,056 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2018-10-04 12:59:51,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:51,056 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-10-04 12:59:51,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-04 12:59:51,056 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-10-04 12:59:51,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-10-04 12:59:51,057 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:51,057 INFO L375 BasicCegarLoop]: trace histogram [72, 1, 1, 1] [2018-10-04 12:59:51,057 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:51,057 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:51,057 INFO L82 PathProgramCache]: Analyzing trace with hash 365428832, now seen corresponding path program 72 times [2018-10-04 12:59:51,057 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:51,057 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:51,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:51,058 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:51,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:51,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:51,391 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:59:51,814 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:59:52,422 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:59:53,194 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:59:53,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:53,243 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:53,244 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:53,251 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:59:53,318 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-04 12:59:53,318 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:53,321 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:53,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:53,557 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:53,557 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-10-04 12:59:53,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-04 12:59:53,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-04 12:59:53,558 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:53,558 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 75 states. [2018-10-04 12:59:53,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:53,663 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-10-04 12:59:53,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-04 12:59:53,664 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 75 [2018-10-04 12:59:53,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:53,664 INFO L225 Difference]: With dead ends: 79 [2018-10-04 12:59:53,664 INFO L226 Difference]: Without dead ends: 77 [2018-10-04 12:59:53,664 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s Time 1.8s impTime 13 [2018-10-04 12:59:53,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-04 12:59:53,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-10-04 12:59:53,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-04 12:59:53,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-10-04 12:59:53,667 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2018-10-04 12:59:53,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:53,667 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-10-04 12:59:53,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-04 12:59:53,668 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-10-04 12:59:53,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-04 12:59:53,668 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:53,668 INFO L375 BasicCegarLoop]: trace histogram [73, 1, 1, 1] [2018-10-04 12:59:53,669 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:53,669 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:53,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1556611962, now seen corresponding path program 73 times [2018-10-04 12:59:53,669 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:53,669 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:53,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:53,670 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:53,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:53,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:54,305 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:59:54,631 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:59:55,039 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:59:56,039 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:59:56,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:56,423 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:56,423 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:56,430 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:59:56,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:56,474 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:56,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:56,629 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:56,629 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-10-04 12:59:56,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-04 12:59:56,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-04 12:59:56,630 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:56,630 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 76 states. [2018-10-04 12:59:56,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:56,780 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-10-04 12:59:56,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-04 12:59:56,781 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 76 [2018-10-04 12:59:56,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:56,781 INFO L225 Difference]: With dead ends: 80 [2018-10-04 12:59:56,781 INFO L226 Difference]: Without dead ends: 78 [2018-10-04 12:59:56,782 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s Time 2.2s impTime 14 [2018-10-04 12:59:56,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-10-04 12:59:56,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-10-04 12:59:56,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-10-04 12:59:56,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-10-04 12:59:56,784 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2018-10-04 12:59:56,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:56,784 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-10-04 12:59:56,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-04 12:59:56,784 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-10-04 12:59:56,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-10-04 12:59:56,785 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:56,785 INFO L375 BasicCegarLoop]: trace histogram [74, 1, 1, 1] [2018-10-04 12:59:56,785 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:56,785 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:56,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1010334432, now seen corresponding path program 74 times [2018-10-04 12:59:56,785 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:56,786 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:56,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:56,786 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:59:56,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:56,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:57,051 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:59:57,348 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:59:57,653 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:59:58,675 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:59:59,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:59,124 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:59:59,124 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:59:59,132 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:59:59,177 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:59:59,177 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:59,179 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:59,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:59,382 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:59:59,382 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-10-04 12:59:59,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-04 12:59:59,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-04 12:59:59,383 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:59,383 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 77 states. [2018-10-04 12:59:59,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:59,597 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-10-04 12:59:59,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-04 12:59:59,597 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 77 [2018-10-04 12:59:59,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:59,597 INFO L225 Difference]: With dead ends: 81 [2018-10-04 12:59:59,597 INFO L226 Difference]: Without dead ends: 79 [2018-10-04 12:59:59,598 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s Time 2.0s impTime 15 [2018-10-04 12:59:59,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-04 12:59:59,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-10-04 12:59:59,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-04 12:59:59,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-10-04 12:59:59,601 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2018-10-04 12:59:59,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:59,601 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-10-04 12:59:59,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-04 12:59:59,601 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-10-04 12:59:59,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-04 12:59:59,602 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:59,602 INFO L375 BasicCegarLoop]: trace histogram [75, 1, 1, 1] [2018-10-04 12:59:59,602 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:59:59,602 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:59,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1255600186, now seen corresponding path program 75 times [2018-10-04 12:59:59,602 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:59,603 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:59,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:59,603 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:59,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:59,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:59,916 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:00:00,212 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:00:00,517 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:00:01,571 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 13:00:02,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:02,087 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:00:02,087 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:00:02,095 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 13:00:02,161 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-10-04 13:00:02,161 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:00:02,163 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:00:02,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:02,317 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:00:02,317 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-10-04 13:00:02,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-04 13:00:02,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-04 13:00:02,318 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:00:02,318 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 78 states. [2018-10-04 13:00:02,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:00:02,478 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-10-04 13:00:02,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-04 13:00:02,479 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 78 [2018-10-04 13:00:02,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:00:02,480 INFO L225 Difference]: With dead ends: 82 [2018-10-04 13:00:02,480 INFO L226 Difference]: Without dead ends: 80 [2018-10-04 13:00:02,480 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s Time 2.1s impTime 16 [2018-10-04 13:00:02,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-10-04 13:00:02,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-10-04 13:00:02,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-04 13:00:02,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-10-04 13:00:02,483 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2018-10-04 13:00:02,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:00:02,484 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-10-04 13:00:02,484 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-04 13:00:02,484 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-10-04 13:00:02,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-04 13:00:02,484 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:00:02,484 INFO L375 BasicCegarLoop]: trace histogram [76, 1, 1, 1] [2018-10-04 13:00:02,484 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:00:02,484 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:00:02,485 INFO L82 PathProgramCache]: Analyzing trace with hash -268903968, now seen corresponding path program 76 times [2018-10-04 13:00:02,485 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:00:02,485 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:00:02,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:02,485 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:00:02,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:02,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:00:02,706 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:00:02,878 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:00:03,284 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:00:04,270 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 13:00:04,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:04,948 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:00:04,948 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:00:04,954 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 13:00:04,994 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 13:00:04,995 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:00:04,997 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:00:05,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:05,149 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:00:05,149 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-10-04 13:00:05,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-10-04 13:00:05,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-10-04 13:00:05,150 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:00:05,150 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 79 states. [2018-10-04 13:00:06,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:00:06,334 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-10-04 13:00:06,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-04 13:00:06,334 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 79 [2018-10-04 13:00:06,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:00:06,335 INFO L225 Difference]: With dead ends: 83 [2018-10-04 13:00:06,335 INFO L226 Difference]: Without dead ends: 81 [2018-10-04 13:00:06,335 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s Time 2.1s impTime 17 [2018-10-04 13:00:06,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-04 13:00:06,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-10-04 13:00:06,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-10-04 13:00:06,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-10-04 13:00:06,338 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2018-10-04 13:00:06,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:00:06,338 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-10-04 13:00:06,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-10-04 13:00:06,338 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-10-04 13:00:06,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-04 13:00:06,339 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:00:06,339 INFO L375 BasicCegarLoop]: trace histogram [77, 1, 1, 1] [2018-10-04 13:00:06,339 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:00:06,339 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:00:06,339 INFO L82 PathProgramCache]: Analyzing trace with hash 253907718, now seen corresponding path program 77 times [2018-10-04 13:00:06,339 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:00:06,339 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:00:06,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:06,340 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:00:06,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:06,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:00:06,820 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:00:07,244 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:00:07,872 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:00:08,642 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 13:00:08,752 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:08,752 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:00:08,752 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:00:08,759 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 13:00:08,827 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-10-04 13:00:08,828 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:00:08,831 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:00:09,073 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:09,093 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:00:09,093 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-10-04 13:00:09,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-04 13:00:09,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-04 13:00:09,094 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:00:09,094 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 80 states. [2018-10-04 13:00:09,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:00:09,210 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2018-10-04 13:00:09,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-04 13:00:09,211 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 80 [2018-10-04 13:00:09,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:00:09,212 INFO L225 Difference]: With dead ends: 84 [2018-10-04 13:00:09,212 INFO L226 Difference]: Without dead ends: 82 [2018-10-04 13:00:09,212 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s Time 2.0s impTime 18 [2018-10-04 13:00:09,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-10-04 13:00:09,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-10-04 13:00:09,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-10-04 13:00:09,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-10-04 13:00:09,215 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2018-10-04 13:00:09,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:00:09,215 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-10-04 13:00:09,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-04 13:00:09,215 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-10-04 13:00:09,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-10-04 13:00:09,216 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:00:09,216 INFO L375 BasicCegarLoop]: trace histogram [78, 1, 1, 1] [2018-10-04 13:00:09,216 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:00:09,216 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:00:09,216 INFO L82 PathProgramCache]: Analyzing trace with hash -718799200, now seen corresponding path program 78 times [2018-10-04 13:00:09,216 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:00:09,217 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:00:09,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:09,217 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:00:09,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:09,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:00:09,451 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:00:09,895 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:00:10,071 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:00:10,552 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 13:00:10,960 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:10,960 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:00:10,960 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:00:10,967 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 13:00:11,031 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2018-10-04 13:00:11,031 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:00:11,034 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:00:11,176 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:11,196 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:00:11,196 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-10-04 13:00:11,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-10-04 13:00:11,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-10-04 13:00:11,198 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:00:11,198 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 81 states. [2018-10-04 13:00:11,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:00:11,333 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-10-04 13:00:11,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-04 13:00:11,333 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 81 [2018-10-04 13:00:11,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:00:11,334 INFO L225 Difference]: With dead ends: 85 [2018-10-04 13:00:11,334 INFO L226 Difference]: Without dead ends: 83 [2018-10-04 13:00:11,334 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 1.4s impTime 19 [2018-10-04 13:00:11,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-04 13:00:11,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-10-04 13:00:11,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-04 13:00:11,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-10-04 13:00:11,336 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2018-10-04 13:00:11,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:00:11,336 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-10-04 13:00:11,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-10-04 13:00:11,337 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-10-04 13:00:11,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-04 13:00:11,337 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:00:11,337 INFO L375 BasicCegarLoop]: trace histogram [79, 1, 1, 1] [2018-10-04 13:00:11,338 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:00:11,338 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:00:11,338 INFO L82 PathProgramCache]: Analyzing trace with hash -807942586, now seen corresponding path program 79 times [2018-10-04 13:00:11,338 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:00:11,338 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:00:11,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:11,338 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:00:11,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:11,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:00:11,830 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:00:12,266 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:00:12,874 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:00:13,869 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 13:00:14,660 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:14,660 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:00:14,660 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:00:14,667 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 13:00:14,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:00:14,716 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:00:14,908 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:14,927 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:00:14,928 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-10-04 13:00:14,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-04 13:00:14,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-04 13:00:14,928 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:00:14,929 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 82 states. [2018-10-04 13:00:15,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:00:15,209 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-10-04 13:00:15,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-04 13:00:15,209 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 82 [2018-10-04 13:00:15,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:00:15,210 INFO L225 Difference]: With dead ends: 86 [2018-10-04 13:00:15,210 INFO L226 Difference]: Without dead ends: 84 [2018-10-04 13:00:15,210 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s Time 2.9s impTime 20 [2018-10-04 13:00:15,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-10-04 13:00:15,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-10-04 13:00:15,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-10-04 13:00:15,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-10-04 13:00:15,213 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2018-10-04 13:00:15,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:00:15,214 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-10-04 13:00:15,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-04 13:00:15,214 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-10-04 13:00:15,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-04 13:00:15,214 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:00:15,214 INFO L375 BasicCegarLoop]: trace histogram [80, 1, 1, 1] [2018-10-04 13:00:15,215 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:00:15,215 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:00:15,215 INFO L82 PathProgramCache]: Analyzing trace with hash 723579744, now seen corresponding path program 80 times [2018-10-04 13:00:15,215 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:00:15,215 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:00:15,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:15,215 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 13:00:15,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:15,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:00:15,531 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:00:15,848 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:00:16,374 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:00:17,374 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 13:00:17,688 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:17,688 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:00:17,688 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:00:17,696 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 13:00:17,744 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 13:00:17,744 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:00:17,747 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:00:18,705 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:18,726 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:00:18,727 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-10-04 13:00:18,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-04 13:00:18,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-04 13:00:18,728 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:00:18,728 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 83 states. [2018-10-04 13:00:18,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:00:18,864 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-10-04 13:00:18,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-04 13:00:18,865 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 83 [2018-10-04 13:00:18,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:00:18,865 INFO L225 Difference]: With dead ends: 87 [2018-10-04 13:00:18,865 INFO L226 Difference]: Without dead ends: 85 [2018-10-04 13:00:18,865 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s Time 2.1s impTime 21 [2018-10-04 13:00:18,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-10-04 13:00:18,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-10-04 13:00:18,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-04 13:00:18,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-10-04 13:00:18,868 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2018-10-04 13:00:18,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:00:18,868 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-10-04 13:00:18,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-04 13:00:18,868 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-10-04 13:00:18,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-04 13:00:18,869 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:00:18,869 INFO L375 BasicCegarLoop]: trace histogram [81, 1, 1, 1] [2018-10-04 13:00:18,869 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:00:18,869 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:00:18,869 INFO L82 PathProgramCache]: Analyzing trace with hash 956131718, now seen corresponding path program 81 times [2018-10-04 13:00:18,869 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:00:18,869 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:00:18,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:18,870 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:00:18,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:18,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:00:19,245 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:00:19,517 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:00:19,976 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:00:20,910 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 13:00:21,706 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:21,707 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:00:21,707 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:00:21,714 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 13:00:21,787 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-10-04 13:00:21,787 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:00:21,790 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:00:21,939 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:21,960 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:00:21,960 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-10-04 13:00:21,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-04 13:00:21,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-04 13:00:21,961 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:00:21,961 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 84 states. [2018-10-04 13:00:22,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:00:22,142 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-10-04 13:00:22,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-10-04 13:00:22,143 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 84 [2018-10-04 13:00:22,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:00:22,143 INFO L225 Difference]: With dead ends: 88 [2018-10-04 13:00:22,144 INFO L226 Difference]: Without dead ends: 86 [2018-10-04 13:00:22,144 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s Time 2.3s impTime 22 [2018-10-04 13:00:22,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-04 13:00:22,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-10-04 13:00:22,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-10-04 13:00:22,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-10-04 13:00:22,146 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2018-10-04 13:00:22,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:00:22,146 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-10-04 13:00:22,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-04 13:00:22,146 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-10-04 13:00:22,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-10-04 13:00:22,147 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:00:22,147 INFO L375 BasicCegarLoop]: trace histogram [82, 1, 1, 1] [2018-10-04 13:00:22,147 INFO L423 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:00:22,147 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:00:22,147 INFO L82 PathProgramCache]: Analyzing trace with hash -424691680, now seen corresponding path program 82 times [2018-10-04 13:00:22,147 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:00:22,148 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:00:22,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:22,148 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:00:22,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:22,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:00:22,496 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:00:22,841 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:00:23,391 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:00:24,383 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 13:00:24,619 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:24,620 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:00:24,620 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:00:24,628 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 13:00:24,678 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 13:00:24,678 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:00:24,681 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:00:25,038 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:25,058 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:00:25,058 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-10-04 13:00:25,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-10-04 13:00:25,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-10-04 13:00:25,059 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:00:25,059 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 85 states. [2018-10-04 13:00:25,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:00:25,525 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-10-04 13:00:25,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-10-04 13:00:25,526 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 85 [2018-10-04 13:00:25,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:00:25,527 INFO L225 Difference]: With dead ends: 89 [2018-10-04 13:00:25,527 INFO L226 Difference]: Without dead ends: 87 [2018-10-04 13:00:25,527 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s Time 2.1s impTime 23 [2018-10-04 13:00:25,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-04 13:00:25,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-10-04 13:00:25,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-04 13:00:25,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-10-04 13:00:25,531 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2018-10-04 13:00:25,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:00:25,531 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-10-04 13:00:25,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-10-04 13:00:25,531 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-10-04 13:00:25,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-04 13:00:25,532 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:00:25,532 INFO L375 BasicCegarLoop]: trace histogram [83, 1, 1, 1] [2018-10-04 13:00:25,532 INFO L423 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:00:25,532 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:00:25,532 INFO L82 PathProgramCache]: Analyzing trace with hash -280544058, now seen corresponding path program 83 times [2018-10-04 13:00:25,532 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:00:25,533 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:00:25,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:25,533 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:00:25,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:25,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:00:25,761 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:00:26,167 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:00:26,774 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:00:27,762 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 13:00:28,849 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:28,850 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:00:28,850 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:00:28,857 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 13:00:28,934 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-10-04 13:00:28,934 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:00:28,936 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:00:29,083 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:29,102 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:00:29,103 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-10-04 13:00:29,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-04 13:00:29,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-04 13:00:29,104 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:00:29,104 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 86 states. [2018-10-04 13:00:29,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:00:29,317 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2018-10-04 13:00:29,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-04 13:00:29,318 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 86 [2018-10-04 13:00:29,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:00:29,319 INFO L225 Difference]: With dead ends: 90 [2018-10-04 13:00:29,319 INFO L226 Difference]: Without dead ends: 88 [2018-10-04 13:00:29,319 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s Time 3.0s impTime 24 [2018-10-04 13:00:29,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-10-04 13:00:29,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-10-04 13:00:29,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-04 13:00:29,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-10-04 13:00:29,322 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2018-10-04 13:00:29,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:00:29,322 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-10-04 13:00:29,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-04 13:00:29,322 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-10-04 13:00:29,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-04 13:00:29,323 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:00:29,323 INFO L375 BasicCegarLoop]: trace histogram [84, 1, 1, 1] [2018-10-04 13:00:29,323 INFO L423 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:00:29,323 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:00:29,323 INFO L82 PathProgramCache]: Analyzing trace with hash -106935072, now seen corresponding path program 84 times [2018-10-04 13:00:29,323 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:00:29,324 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:00:29,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:29,324 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:00:29,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:29,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:00:29,572 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:00:29,830 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:00:30,082 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:00:30,675 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 13:00:31,474 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 13:00:31,483 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:31,484 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:00:31,484 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:00:31,494 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 13:00:31,569 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-10-04 13:00:31,569 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:00:31,571 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:00:31,721 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:31,742 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:00:31,742 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-10-04 13:00:31,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-10-04 13:00:31,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-10-04 13:00:31,743 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:00:31,743 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 87 states. [2018-10-04 13:00:32,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:00:32,100 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-10-04 13:00:32,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-10-04 13:00:32,101 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 87 [2018-10-04 13:00:32,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:00:32,101 INFO L225 Difference]: With dead ends: 91 [2018-10-04 13:00:32,102 INFO L226 Difference]: Without dead ends: 89 [2018-10-04 13:00:32,102 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time 1.8s impTime 8 [2018-10-04 13:00:32,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-04 13:00:32,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-10-04 13:00:32,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-04 13:00:32,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-10-04 13:00:32,105 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2018-10-04 13:00:32,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:00:32,105 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-10-04 13:00:32,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-10-04 13:00:32,106 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-10-04 13:00:32,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-04 13:00:32,106 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:00:32,106 INFO L375 BasicCegarLoop]: trace histogram [85, 1, 1, 1] [2018-10-04 13:00:32,107 INFO L423 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:00:32,107 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:00:32,107 INFO L82 PathProgramCache]: Analyzing trace with hash 979976198, now seen corresponding path program 85 times [2018-10-04 13:00:32,107 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:00:32,107 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:00:32,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:32,109 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:00:32,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:32,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:00:32,349 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:00:32,771 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:00:33,378 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:00:33,796 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 13:00:34,189 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 13:00:34,227 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:34,227 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:00:34,227 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:00:34,236 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 13:00:34,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:00:34,289 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:00:34,442 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:34,462 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:00:34,462 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-10-04 13:00:34,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-04 13:00:34,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-04 13:00:34,463 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:00:34,463 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 88 states. [2018-10-04 13:00:34,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:00:34,591 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2018-10-04 13:00:34,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-04 13:00:34,592 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 88 [2018-10-04 13:00:34,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:00:34,593 INFO L225 Difference]: With dead ends: 92 [2018-10-04 13:00:34,593 INFO L226 Difference]: Without dead ends: 90 [2018-10-04 13:00:34,593 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time 1.7s impTime 9 [2018-10-04 13:00:34,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-10-04 13:00:34,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-10-04 13:00:34,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-10-04 13:00:34,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-10-04 13:00:34,597 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2018-10-04 13:00:34,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:00:34,597 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-10-04 13:00:34,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-04 13:00:34,597 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-10-04 13:00:34,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-10-04 13:00:34,598 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:00:34,598 INFO L375 BasicCegarLoop]: trace histogram [86, 1, 1, 1] [2018-10-04 13:00:34,598 INFO L423 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:00:34,598 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:00:34,598 INFO L82 PathProgramCache]: Analyzing trace with hash 314487200, now seen corresponding path program 86 times [2018-10-04 13:00:34,598 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:00:34,598 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:00:34,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:34,599 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 13:00:34,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:34,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:00:34,837 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:00:35,126 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:00:35,637 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:00:36,774 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 13:00:37,282 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 13:00:37,318 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:37,318 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:00:37,318 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:00:37,325 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 13:00:37,373 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 13:00:37,373 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:00:37,376 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:00:37,522 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:37,542 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:00:37,543 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-10-04 13:00:37,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-10-04 13:00:37,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-10-04 13:00:37,544 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:00:37,544 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 89 states. [2018-10-04 13:00:37,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:00:37,704 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-10-04 13:00:37,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-10-04 13:00:37,704 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 89 [2018-10-04 13:00:37,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:00:37,705 INFO L225 Difference]: With dead ends: 93 [2018-10-04 13:00:37,705 INFO L226 Difference]: Without dead ends: 91 [2018-10-04 13:00:37,705 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s Time 2.1s impTime 10 [2018-10-04 13:00:37,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-04 13:00:37,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-10-04 13:00:37,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-04 13:00:37,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-10-04 13:00:37,708 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2018-10-04 13:00:37,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:00:37,708 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-10-04 13:00:37,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-10-04 13:00:37,708 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-10-04 13:00:37,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-04 13:00:37,709 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:00:37,709 INFO L375 BasicCegarLoop]: trace histogram [87, 1, 1, 1] [2018-10-04 13:00:37,709 INFO L423 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:00:37,709 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:00:37,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1159164742, now seen corresponding path program 87 times [2018-10-04 13:00:37,709 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:00:37,709 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:00:37,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:37,710 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:00:37,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:37,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:00:38,058 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:00:38,239 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:00:38,667 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:00:39,653 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 13:00:40,671 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 13:00:40,699 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:40,700 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:00:40,700 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:00:40,707 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 13:00:40,790 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-10-04 13:00:40,790 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:00:40,793 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:00:40,949 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:40,968 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:00:40,968 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-10-04 13:00:40,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-04 13:00:40,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-04 13:00:40,969 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:00:40,969 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 90 states. [2018-10-04 13:00:41,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:00:41,133 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-10-04 13:00:41,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-04 13:00:41,134 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 90 [2018-10-04 13:00:41,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:00:41,134 INFO L225 Difference]: With dead ends: 94 [2018-10-04 13:00:41,135 INFO L226 Difference]: Without dead ends: 92 [2018-10-04 13:00:41,135 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s Time 2.5s impTime 11 [2018-10-04 13:00:41,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-10-04 13:00:41,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-10-04 13:00:41,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-10-04 13:00:41,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-10-04 13:00:41,137 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2018-10-04 13:00:41,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:00:41,138 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-10-04 13:00:41,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-04 13:00:41,138 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-10-04 13:00:41,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-10-04 13:00:41,138 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:00:41,138 INFO L375 BasicCegarLoop]: trace histogram [88, 1, 1, 1] [2018-10-04 13:00:41,138 INFO L423 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:00:41,139 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:00:41,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1574364768, now seen corresponding path program 88 times [2018-10-04 13:00:41,139 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:00:41,139 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:00:41,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:41,139 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:00:41,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:41,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:00:41,347 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:00:41,555 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:00:42,003 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:00:42,993 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 13:00:43,855 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 13:00:43,899 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:43,900 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:00:43,900 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:00:43,906 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 13:00:43,958 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 13:00:43,958 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:00:43,961 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:00:44,120 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:44,140 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:00:44,140 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-10-04 13:00:44,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-10-04 13:00:44,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-10-04 13:00:44,141 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:00:44,141 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 91 states. [2018-10-04 13:00:44,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:00:44,334 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-10-04 13:00:44,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-10-04 13:00:44,334 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 91 [2018-10-04 13:00:44,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:00:44,334 INFO L225 Difference]: With dead ends: 95 [2018-10-04 13:00:44,334 INFO L226 Difference]: Without dead ends: 93 [2018-10-04 13:00:44,335 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s Time 2.4s impTime 12 [2018-10-04 13:00:44,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-04 13:00:44,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-10-04 13:00:44,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-10-04 13:00:44,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-10-04 13:00:44,337 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2018-10-04 13:00:44,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:00:44,337 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-10-04 13:00:44,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-10-04 13:00:44,337 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-10-04 13:00:44,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-04 13:00:44,338 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:00:44,338 INFO L375 BasicCegarLoop]: trace histogram [89, 1, 1, 1] [2018-10-04 13:00:44,338 INFO L423 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:00:44,338 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:00:44,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1560663686, now seen corresponding path program 89 times [2018-10-04 13:00:44,338 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:00:44,339 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:00:44,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:44,339 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:00:44,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:44,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:00:44,540 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:00:44,910 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:00:45,482 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:00:46,483 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 13:00:46,700 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 13:00:46,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:46,807 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:00:46,807 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:00:46,816 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 13:00:46,946 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-10-04 13:00:46,946 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:00:46,950 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:00:47,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:47,174 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:00:47,175 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-10-04 13:00:47,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-04 13:00:47,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-04 13:00:47,176 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:00:47,176 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 92 states. [2018-10-04 13:00:47,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:00:47,330 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2018-10-04 13:00:47,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-10-04 13:00:47,331 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 92 [2018-10-04 13:00:47,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:00:47,332 INFO L225 Difference]: With dead ends: 96 [2018-10-04 13:00:47,332 INFO L226 Difference]: Without dead ends: 94 [2018-10-04 13:00:47,332 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s Time 2.1s impTime 13 [2018-10-04 13:00:47,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-10-04 13:00:47,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-10-04 13:00:47,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-04 13:00:47,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-10-04 13:00:47,334 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2018-10-04 13:00:47,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:00:47,334 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-10-04 13:00:47,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-10-04 13:00:47,334 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-10-04 13:00:47,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-10-04 13:00:47,335 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:00:47,335 INFO L375 BasicCegarLoop]: trace histogram [90, 1, 1, 1] [2018-10-04 13:00:47,335 INFO L423 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:00:47,335 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:00:47,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1135930144, now seen corresponding path program 90 times [2018-10-04 13:00:47,335 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:00:47,336 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:00:47,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:47,336 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:00:47,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:47,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:00:47,530 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:00:47,907 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:00:48,356 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:00:48,642 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 13:00:49,188 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 13:00:49,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:49,428 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:00:49,428 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:00:49,436 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 13:00:49,516 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2018-10-04 13:00:49,517 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:00:49,520 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:00:49,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:49,697 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:00:49,698 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-10-04 13:00:49,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-10-04 13:00:49,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-10-04 13:00:49,698 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:00:49,699 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 93 states. [2018-10-04 13:00:49,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:00:49,841 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-10-04 13:00:49,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-10-04 13:00:49,842 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 93 [2018-10-04 13:00:49,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:00:49,843 INFO L225 Difference]: With dead ends: 97 [2018-10-04 13:00:49,843 INFO L226 Difference]: Without dead ends: 95 [2018-10-04 13:00:49,843 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time 1.7s impTime 14 [2018-10-04 13:00:49,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-04 13:00:49,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-10-04 13:00:49,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-04 13:00:49,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-10-04 13:00:49,847 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2018-10-04 13:00:49,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:00:49,847 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-10-04 13:00:49,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-10-04 13:00:49,847 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-10-04 13:00:49,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-04 13:00:49,848 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:00:49,848 INFO L375 BasicCegarLoop]: trace histogram [91, 1, 1, 1] [2018-10-04 13:00:49,848 INFO L423 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:00:49,848 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:00:49,848 INFO L82 PathProgramCache]: Analyzing trace with hash 854092230, now seen corresponding path program 91 times [2018-10-04 13:00:49,848 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:00:49,848 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:00:49,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:49,849 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:00:49,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:49,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:00:50,047 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:00:50,282 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:00:50,726 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:00:51,503 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 13:00:52,510 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 13:00:52,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:52,984 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:00:52,984 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:00:53,002 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 13:00:53,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:00:53,058 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:00:53,219 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:53,238 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:00:53,239 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-10-04 13:00:53,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-10-04 13:00:53,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-10-04 13:00:53,239 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:00:53,240 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 94 states. [2018-10-04 13:00:53,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:00:53,459 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-10-04 13:00:53,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-10-04 13:00:53,459 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 94 [2018-10-04 13:00:53,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:00:53,460 INFO L225 Difference]: With dead ends: 98 [2018-10-04 13:00:53,460 INFO L226 Difference]: Without dead ends: 96 [2018-10-04 13:00:53,460 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s Time 2.7s impTime 15 [2018-10-04 13:00:53,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-10-04 13:00:53,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-10-04 13:00:53,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-10-04 13:00:53,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-10-04 13:00:53,462 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2018-10-04 13:00:53,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:00:53,462 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-10-04 13:00:53,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-10-04 13:00:53,462 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-10-04 13:00:53,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-10-04 13:00:53,463 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:00:53,463 INFO L375 BasicCegarLoop]: trace histogram [92, 1, 1, 1] [2018-10-04 13:00:53,463 INFO L423 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:00:53,463 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:00:53,463 INFO L82 PathProgramCache]: Analyzing trace with hash 707051488, now seen corresponding path program 92 times [2018-10-04 13:00:53,463 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:00:53,463 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:00:53,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:53,464 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 13:00:53,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:53,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:00:53,677 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:00:54,087 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:00:54,362 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:00:55,361 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 13:00:56,579 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 13:00:57,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:57,221 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:00:57,221 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:00:57,227 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 13:00:57,290 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 13:00:57,291 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:00:57,294 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:00:57,506 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:57,526 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:00:57,526 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-10-04 13:00:57,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-10-04 13:00:57,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-10-04 13:00:57,527 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:00:57,527 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 95 states. [2018-10-04 13:00:57,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:00:57,761 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-10-04 13:00:57,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-10-04 13:00:57,761 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 95 [2018-10-04 13:00:57,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:00:57,762 INFO L225 Difference]: With dead ends: 99 [2018-10-04 13:00:57,762 INFO L226 Difference]: Without dead ends: 97 [2018-10-04 13:00:57,762 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s Time 3.3s impTime 16 [2018-10-04 13:00:57,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-10-04 13:00:57,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-10-04 13:00:57,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-10-04 13:00:57,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-10-04 13:00:57,765 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2018-10-04 13:00:57,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:00:57,766 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-10-04 13:00:57,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-10-04 13:00:57,766 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-10-04 13:00:57,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-10-04 13:00:57,767 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:00:57,767 INFO L375 BasicCegarLoop]: trace histogram [93, 1, 1, 1] [2018-10-04 13:00:57,767 INFO L423 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:00:57,767 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:00:57,767 INFO L82 PathProgramCache]: Analyzing trace with hash 443755782, now seen corresponding path program 93 times [2018-10-04 13:00:57,767 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:00:57,768 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:00:57,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:57,768 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:00:57,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:57,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:00:57,984 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:00:58,353 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:00:58,876 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:00:59,131 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 13:00:59,638 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 13:00:59,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:00:59,991 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:00:59,991 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:00:59,999 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 13:01:00,089 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-10-04 13:01:00,089 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:01:00,092 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:01:00,275 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:00,295 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:01:00,295 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-10-04 13:01:00,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-04 13:01:00,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-04 13:01:00,296 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:01:00,296 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 96 states. [2018-10-04 13:01:00,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:01:00,454 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2018-10-04 13:01:00,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-04 13:01:00,455 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 96 [2018-10-04 13:01:00,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:01:00,455 INFO L225 Difference]: With dead ends: 100 [2018-10-04 13:01:00,455 INFO L226 Difference]: Without dead ends: 98 [2018-10-04 13:01:00,456 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s Time 1.8s impTime 17 [2018-10-04 13:01:00,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-10-04 13:01:00,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-10-04 13:01:00,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-04 13:01:00,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-10-04 13:01:00,458 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2018-10-04 13:01:00,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:01:00,458 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-10-04 13:01:00,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-04 13:01:00,459 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-10-04 13:01:00,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-10-04 13:01:00,459 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:01:00,459 INFO L375 BasicCegarLoop]: trace histogram [94, 1, 1, 1] [2018-10-04 13:01:00,459 INFO L423 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:01:00,459 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:01:00,459 INFO L82 PathProgramCache]: Analyzing trace with hash 871523488, now seen corresponding path program 94 times [2018-10-04 13:01:00,459 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:01:00,460 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:01:00,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:00,460 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:01:00,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:00,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:01:00,861 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:01:01,233 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:01:01,837 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:01:02,821 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 13:01:04,023 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 13:01:04,828 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:04,829 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:01:04,829 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:01:04,836 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 13:01:04,891 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 13:01:04,892 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:01:04,894 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:01:05,060 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:05,080 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:01:05,080 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-10-04 13:01:05,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-10-04 13:01:05,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-10-04 13:01:05,081 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:01:05,081 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 97 states. [2018-10-04 13:01:05,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:01:05,363 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-10-04 13:01:05,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-10-04 13:01:05,363 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 97 [2018-10-04 13:01:05,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:01:05,364 INFO L225 Difference]: With dead ends: 101 [2018-10-04 13:01:05,364 INFO L226 Difference]: Without dead ends: 99 [2018-10-04 13:01:05,365 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s Time 3.9s impTime 18 [2018-10-04 13:01:05,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-04 13:01:05,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-10-04 13:01:05,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-10-04 13:01:05,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-10-04 13:01:05,368 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2018-10-04 13:01:05,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:01:05,369 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-10-04 13:01:05,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-10-04 13:01:05,369 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-10-04 13:01:05,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-04 13:01:05,369 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:01:05,370 INFO L375 BasicCegarLoop]: trace histogram [95, 1, 1, 1] [2018-10-04 13:01:05,370 INFO L423 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:01:05,370 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:01:05,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1247420486, now seen corresponding path program 95 times [2018-10-04 13:01:05,370 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:01:05,370 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:01:05,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:05,371 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:01:05,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:05,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:01:05,566 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:01:05,955 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:01:06,275 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:01:06,621 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 13:01:07,216 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 13:01:07,712 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:07,712 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:01:07,712 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:01:07,722 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 13:01:07,810 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-10-04 13:01:07,811 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:01:07,814 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:01:07,976 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:07,997 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:01:07,997 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-10-04 13:01:07,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-10-04 13:01:07,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-10-04 13:01:07,998 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:01:07,998 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 98 states. [2018-10-04 13:01:08,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:01:08,186 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2018-10-04 13:01:08,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-10-04 13:01:08,187 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 98 [2018-10-04 13:01:08,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:01:08,187 INFO L225 Difference]: With dead ends: 102 [2018-10-04 13:01:08,187 INFO L226 Difference]: Without dead ends: 100 [2018-10-04 13:01:08,188 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s Time 1.9s impTime 19 [2018-10-04 13:01:08,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-10-04 13:01:08,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-10-04 13:01:08,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-04 13:01:08,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-10-04 13:01:08,190 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2018-10-04 13:01:08,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:01:08,190 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-10-04 13:01:08,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-10-04 13:01:08,190 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-10-04 13:01:08,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-10-04 13:01:08,190 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:01:08,190 INFO L375 BasicCegarLoop]: trace histogram [96, 1, 1, 1] [2018-10-04 13:01:08,191 INFO L423 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:01:08,191 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:01:08,191 INFO L82 PathProgramCache]: Analyzing trace with hash 15325536, now seen corresponding path program 96 times [2018-10-04 13:01:08,191 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:01:08,191 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:01:08,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:08,192 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:01:08,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:08,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:01:08,432 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:01:08,632 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:01:08,997 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:01:09,992 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 13:01:11,190 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 13:01:11,486 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:11,486 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:01:11,486 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:01:11,493 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 13:01:11,582 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-10-04 13:01:11,582 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:01:11,585 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:01:11,755 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:11,775 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:01:11,775 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-10-04 13:01:11,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-10-04 13:01:11,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-10-04 13:01:11,776 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:01:11,776 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 99 states. [2018-10-04 13:01:11,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:01:11,984 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-10-04 13:01:11,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-10-04 13:01:11,985 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 99 [2018-10-04 13:01:11,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:01:11,985 INFO L225 Difference]: With dead ends: 103 [2018-10-04 13:01:11,985 INFO L226 Difference]: Without dead ends: 101 [2018-10-04 13:01:11,986 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s Time 2.9s impTime 20 [2018-10-04 13:01:11,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-04 13:01:11,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-10-04 13:01:11,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-04 13:01:11,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-10-04 13:01:11,987 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2018-10-04 13:01:11,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:01:11,988 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-10-04 13:01:11,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-10-04 13:01:11,988 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-10-04 13:01:11,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-04 13:01:11,988 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:01:11,988 INFO L375 BasicCegarLoop]: trace histogram [97, 1, 1, 1] [2018-10-04 13:01:11,988 INFO L423 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:01:11,989 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:01:11,989 INFO L82 PathProgramCache]: Analyzing trace with hash 475087750, now seen corresponding path program 97 times [2018-10-04 13:01:11,989 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:01:11,989 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:01:11,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:11,989 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:01:11,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:12,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:01:12,248 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:01:12,669 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:01:13,284 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:01:14,267 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 13:01:15,466 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 13:01:16,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:16,521 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:01:16,521 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:01:16,528 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 13:01:16,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:01:16,586 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:01:16,770 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:16,790 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:01:16,790 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-10-04 13:01:16,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-10-04 13:01:16,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-10-04 13:01:16,791 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:01:16,791 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 100 states. [2018-10-04 13:01:17,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:01:17,097 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2018-10-04 13:01:17,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-10-04 13:01:17,097 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 100 [2018-10-04 13:01:17,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:01:17,098 INFO L225 Difference]: With dead ends: 104 [2018-10-04 13:01:17,098 INFO L226 Difference]: Without dead ends: 102 [2018-10-04 13:01:17,099 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6s Time 4.1s impTime 21 [2018-10-04 13:01:17,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-10-04 13:01:17,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-10-04 13:01:17,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-10-04 13:01:17,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-10-04 13:01:17,102 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2018-10-04 13:01:17,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:01:17,103 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-10-04 13:01:17,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-10-04 13:01:17,103 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-10-04 13:01:17,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-10-04 13:01:17,103 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:01:17,103 INFO L375 BasicCegarLoop]: trace histogram [98, 1, 1, 1] [2018-10-04 13:01:17,103 INFO L423 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:01:17,104 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:01:17,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1842814496, now seen corresponding path program 98 times [2018-10-04 13:01:17,104 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:01:17,104 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:01:17,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:17,104 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 13:01:17,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:17,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:01:17,357 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:01:17,530 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:01:17,852 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:01:18,506 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 13:01:19,389 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 13:01:20,354 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:20,354 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:01:20,354 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:01:20,362 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 13:01:20,418 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 13:01:20,418 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:01:20,421 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:01:20,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:20,620 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:01:20,621 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-10-04 13:01:20,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-10-04 13:01:20,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-10-04 13:01:20,622 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:01:20,622 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 101 states. [2018-10-04 13:01:20,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:01:20,876 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-10-04 13:01:20,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-10-04 13:01:20,876 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 101 [2018-10-04 13:01:20,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:01:20,877 INFO L225 Difference]: With dead ends: 105 [2018-10-04 13:01:20,878 INFO L226 Difference]: Without dead ends: 103 [2018-10-04 13:01:20,878 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s Time 2.8s impTime 22 [2018-10-04 13:01:20,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-04 13:01:20,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-10-04 13:01:20,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-04 13:01:20,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-10-04 13:01:20,880 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101 [2018-10-04 13:01:20,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:01:20,880 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-10-04 13:01:20,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-10-04 13:01:20,881 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-10-04 13:01:20,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-04 13:01:20,881 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:01:20,881 INFO L375 BasicCegarLoop]: trace histogram [99, 1, 1, 1] [2018-10-04 13:01:20,881 INFO L423 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:01:20,881 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:01:20,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1292670662, now seen corresponding path program 99 times [2018-10-04 13:01:20,882 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:01:20,882 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:01:20,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:20,882 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:01:20,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:20,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:01:21,078 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:01:21,481 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:01:21,702 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:01:22,109 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 13:01:22,765 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 13:01:23,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:23,682 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:01:23,682 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:01:23,689 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 13:01:23,786 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2018-10-04 13:01:23,786 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:01:23,789 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:01:23,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:23,986 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:01:23,987 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-10-04 13:01:23,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-10-04 13:01:23,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-10-04 13:01:23,988 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:01:23,988 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 102 states. [2018-10-04 13:01:24,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:01:24,225 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2018-10-04 13:01:24,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-10-04 13:01:24,226 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 102 [2018-10-04 13:01:24,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:01:24,227 INFO L225 Difference]: With dead ends: 106 [2018-10-04 13:01:24,227 INFO L226 Difference]: Without dead ends: 104 [2018-10-04 13:01:24,227 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s Time 2.4s impTime 23 [2018-10-04 13:01:24,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-10-04 13:01:24,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-10-04 13:01:24,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-10-04 13:01:24,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-10-04 13:01:24,230 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102 [2018-10-04 13:01:24,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:01:24,230 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-10-04 13:01:24,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-10-04 13:01:24,230 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-10-04 13:01:24,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-10-04 13:01:24,231 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:01:24,231 INFO L375 BasicCegarLoop]: trace histogram [100, 1, 1, 1] [2018-10-04 13:01:24,231 INFO L423 AbstractCegarLoop]: === Iteration 101 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:01:24,231 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:01:24,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1418080992, now seen corresponding path program 100 times [2018-10-04 13:01:24,231 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:01:24,231 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:01:24,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:24,232 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:01:24,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:24,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:01:24,432 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:01:24,813 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:01:25,194 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:01:25,506 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 13:01:26,068 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 13:01:27,019 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:27,019 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:01:27,019 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:01:27,026 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 13:01:27,087 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 13:01:27,087 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:01:27,090 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:01:27,258 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:27,278 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:01:27,278 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-10-04 13:01:27,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-10-04 13:01:27,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-10-04 13:01:27,280 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:01:27,280 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 103 states. [2018-10-04 13:01:27,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:01:27,508 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-10-04 13:01:27,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-10-04 13:01:27,509 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 103 [2018-10-04 13:01:27,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:01:27,510 INFO L225 Difference]: With dead ends: 107 [2018-10-04 13:01:27,510 INFO L226 Difference]: Without dead ends: 105 [2018-10-04 13:01:27,510 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s Time 2.4s impTime 24 [2018-10-04 13:01:27,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-10-04 13:01:27,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-10-04 13:01:27,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-04 13:01:27,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-10-04 13:01:27,512 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 103 [2018-10-04 13:01:27,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:01:27,513 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-10-04 13:01:27,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-10-04 13:01:27,513 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-10-04 13:01:27,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-04 13:01:27,513 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:01:27,514 INFO L375 BasicCegarLoop]: trace histogram [101, 1, 1, 1] [2018-10-04 13:01:27,514 INFO L423 AbstractCegarLoop]: === Iteration 102 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:01:27,514 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:01:27,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1010833926, now seen corresponding path program 101 times [2018-10-04 13:01:27,514 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:01:27,514 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:01:27,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:27,515 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:01:27,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:27,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:01:27,719 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:01:28,113 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:01:28,380 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:01:28,757 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 13:01:29,381 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 13:01:30,510 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 13:01:30,522 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:30,522 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:01:30,522 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:01:30,532 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 13:01:30,636 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2018-10-04 13:01:30,636 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:01:30,639 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:01:30,827 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:30,847 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:01:30,847 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-10-04 13:01:30,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-10-04 13:01:30,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-10-04 13:01:30,848 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:01:30,849 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 104 states. [2018-10-04 13:01:31,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:01:31,097 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2018-10-04 13:01:31,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-10-04 13:01:31,098 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 104 [2018-10-04 13:01:31,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:01:31,099 INFO L225 Difference]: With dead ends: 108 [2018-10-04 13:01:31,099 INFO L226 Difference]: Without dead ends: 106 [2018-10-04 13:01:31,099 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s Time 2.5s impTime 8 [2018-10-04 13:01:31,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-10-04 13:01:31,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-10-04 13:01:31,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-10-04 13:01:31,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-10-04 13:01:31,102 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 104 [2018-10-04 13:01:31,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:01:31,102 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-10-04 13:01:31,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-10-04 13:01:31,102 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-10-04 13:01:31,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-10-04 13:01:31,103 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:01:31,103 INFO L375 BasicCegarLoop]: trace histogram [102, 1, 1, 1] [2018-10-04 13:01:31,103 INFO L423 AbstractCegarLoop]: === Iteration 103 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:01:31,103 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:01:31,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1271076768, now seen corresponding path program 102 times [2018-10-04 13:01:31,103 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:01:31,103 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:01:31,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:31,104 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:01:31,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:31,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:01:31,382 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:01:31,621 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:01:31,898 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:01:32,490 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 13:01:33,317 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 13:01:34,587 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 13:01:34,691 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:34,691 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:01:34,691 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:01:34,698 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 13:01:34,838 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2018-10-04 13:01:34,838 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:01:34,842 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:01:35,027 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:35,047 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:01:35,047 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-10-04 13:01:35,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-10-04 13:01:35,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-10-04 13:01:35,049 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:01:35,049 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 105 states. [2018-10-04 13:01:35,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:01:35,329 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-10-04 13:01:35,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-10-04 13:01:35,329 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 105 [2018-10-04 13:01:35,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:01:35,330 INFO L225 Difference]: With dead ends: 109 [2018-10-04 13:01:35,330 INFO L226 Difference]: Without dead ends: 107 [2018-10-04 13:01:35,330 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s Time 3.0s impTime 9 [2018-10-04 13:01:35,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-04 13:01:35,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-10-04 13:01:35,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-04 13:01:35,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-10-04 13:01:35,332 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 105 [2018-10-04 13:01:35,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:01:35,333 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-10-04 13:01:35,333 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-10-04 13:01:35,333 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-10-04 13:01:35,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-04 13:01:35,334 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:01:35,334 INFO L375 BasicCegarLoop]: trace histogram [103, 1, 1, 1] [2018-10-04 13:01:35,334 INFO L423 AbstractCegarLoop]: === Iteration 104 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:01:35,334 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:01:35,334 INFO L82 PathProgramCache]: Analyzing trace with hash 748670278, now seen corresponding path program 103 times [2018-10-04 13:01:35,334 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:01:35,335 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:01:35,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:35,335 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:01:35,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:35,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:01:35,597 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:01:35,999 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:01:36,583 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:01:37,544 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 13:01:38,728 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 13:01:40,174 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 13:01:40,370 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:40,370 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:01:40,370 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:01:40,377 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 13:01:40,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:01:40,438 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:01:40,684 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:40,703 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:01:40,703 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-10-04 13:01:40,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-10-04 13:01:40,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-10-04 13:01:40,704 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:01:40,705 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 106 states. [2018-10-04 13:01:41,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:01:41,051 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2018-10-04 13:01:41,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-10-04 13:01:41,052 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 106 [2018-10-04 13:01:41,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:01:41,052 INFO L225 Difference]: With dead ends: 110 [2018-10-04 13:01:41,052 INFO L226 Difference]: Without dead ends: 108 [2018-10-04 13:01:41,052 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1s Time 4.5s impTime 10 [2018-10-04 13:01:41,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-10-04 13:01:41,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-10-04 13:01:41,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-10-04 13:01:41,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-10-04 13:01:41,054 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 106 [2018-10-04 13:01:41,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:01:41,054 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-10-04 13:01:41,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-10-04 13:01:41,055 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-10-04 13:01:41,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-04 13:01:41,055 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:01:41,056 INFO L375 BasicCegarLoop]: trace histogram [104, 1, 1, 1] [2018-10-04 13:01:41,056 INFO L423 AbstractCegarLoop]: === Iteration 105 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:01:41,056 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:01:41,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1733938272, now seen corresponding path program 104 times [2018-10-04 13:01:41,056 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:01:41,056 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:01:41,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:41,057 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 13:01:41,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:41,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:01:41,438 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:01:41,780 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:01:42,066 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:01:43,053 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 13:01:44,254 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 13:01:45,231 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 13:01:45,271 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:45,272 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:01:45,272 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:01:45,279 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 13:01:45,336 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 13:01:45,337 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:01:45,340 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:01:45,602 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:45,621 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:01:45,622 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106 [2018-10-04 13:01:45,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-10-04 13:01:45,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-10-04 13:01:45,623 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:01:45,623 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 107 states. [2018-10-04 13:01:45,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:01:45,864 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-10-04 13:01:45,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-10-04 13:01:45,864 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 107 [2018-10-04 13:01:45,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:01:45,865 INFO L225 Difference]: With dead ends: 111 [2018-10-04 13:01:45,865 INFO L226 Difference]: Without dead ends: 109 [2018-10-04 13:01:45,865 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s Time 3.6s impTime 11 [2018-10-04 13:01:45,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-10-04 13:01:45,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-10-04 13:01:45,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-10-04 13:01:45,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-10-04 13:01:45,867 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 107 [2018-10-04 13:01:45,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:01:45,867 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-10-04 13:01:45,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-10-04 13:01:45,867 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-10-04 13:01:45,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-04 13:01:45,868 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:01:45,868 INFO L375 BasicCegarLoop]: trace histogram [105, 1, 1, 1] [2018-10-04 13:01:45,868 INFO L423 AbstractCegarLoop]: === Iteration 106 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:01:45,868 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:01:45,868 INFO L82 PathProgramCache]: Analyzing trace with hash -2082492282, now seen corresponding path program 105 times [2018-10-04 13:01:45,868 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:01:45,868 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:01:45,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:45,869 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:01:45,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:45,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:01:46,114 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:01:46,487 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:01:47,093 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:01:47,386 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 13:01:47,833 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 13:01:48,541 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 13:01:48,745 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:48,745 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:01:48,745 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:01:48,754 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 13:01:48,859 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2018-10-04 13:01:48,860 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:01:48,863 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:01:49,047 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:49,066 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:01:49,067 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-10-04 13:01:49,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-10-04 13:01:49,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-10-04 13:01:49,068 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:01:49,068 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 108 states. [2018-10-04 13:01:49,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:01:49,271 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2018-10-04 13:01:49,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-10-04 13:01:49,272 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 108 [2018-10-04 13:01:49,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:01:49,272 INFO L225 Difference]: With dead ends: 112 [2018-10-04 13:01:49,273 INFO L226 Difference]: Without dead ends: 110 [2018-10-04 13:01:49,273 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s Time 2.4s impTime 12 [2018-10-04 13:01:49,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-10-04 13:01:49,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-10-04 13:01:49,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-10-04 13:01:49,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-10-04 13:01:49,275 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 108 [2018-10-04 13:01:49,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:01:49,276 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-10-04 13:01:49,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-10-04 13:01:49,276 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-10-04 13:01:49,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-10-04 13:01:49,277 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:01:49,277 INFO L375 BasicCegarLoop]: trace histogram [106, 1, 1, 1] [2018-10-04 13:01:49,277 INFO L423 AbstractCegarLoop]: === Iteration 107 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:01:49,277 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:01:49,277 INFO L82 PathProgramCache]: Analyzing trace with hash -132755168, now seen corresponding path program 106 times [2018-10-04 13:01:49,278 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:01:49,278 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:01:49,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:49,278 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:01:49,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:49,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:01:49,547 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:01:49,969 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:01:50,582 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:01:51,565 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 13:01:52,764 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 13:01:54,234 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 13:01:54,704 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:54,704 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:01:54,704 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:01:54,712 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 13:01:54,773 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 13:01:54,773 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:01:54,777 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:01:54,957 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:54,977 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:01:54,977 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 108 [2018-10-04 13:01:54,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-10-04 13:01:54,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-10-04 13:01:54,978 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:01:54,978 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 109 states. [2018-10-04 13:01:55,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:01:55,335 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-10-04 13:01:55,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-10-04 13:01:55,335 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 109 [2018-10-04 13:01:55,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:01:55,336 INFO L225 Difference]: With dead ends: 113 [2018-10-04 13:01:55,336 INFO L226 Difference]: Without dead ends: 111 [2018-10-04 13:01:55,336 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.4s Time 4.9s impTime 13 [2018-10-04 13:01:55,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-04 13:01:55,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-10-04 13:01:55,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-10-04 13:01:55,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-10-04 13:01:55,340 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 109 [2018-10-04 13:01:55,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:01:55,340 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-10-04 13:01:55,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-10-04 13:01:55,340 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-10-04 13:01:55,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-04 13:01:55,341 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:01:55,341 INFO L375 BasicCegarLoop]: trace histogram [107, 1, 1, 1] [2018-10-04 13:01:55,341 INFO L423 AbstractCegarLoop]: === Iteration 108 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:01:55,341 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:01:55,341 INFO L82 PathProgramCache]: Analyzing trace with hash 179553222, now seen corresponding path program 107 times [2018-10-04 13:01:55,341 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:01:55,342 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:01:55,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:55,342 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:01:55,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:55,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:01:55,614 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:01:56,035 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:01:56,645 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:01:57,314 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 13:01:57,613 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 13:01:58,548 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 13:01:59,117 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:59,117 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:01:59,118 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:01:59,125 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 13:01:59,232 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2018-10-04 13:01:59,232 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:01:59,237 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:01:59,434 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:01:59,455 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:01:59,455 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109] total 109 [2018-10-04 13:01:59,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-10-04 13:01:59,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-10-04 13:01:59,456 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:01:59,456 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 110 states. [2018-10-04 13:01:59,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:01:59,725 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2018-10-04 13:01:59,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-10-04 13:01:59,726 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 110 [2018-10-04 13:01:59,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:01:59,726 INFO L225 Difference]: With dead ends: 114 [2018-10-04 13:01:59,726 INFO L226 Difference]: Without dead ends: 112 [2018-10-04 13:01:59,726 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s Time 3.3s impTime 14 [2018-10-04 13:01:59,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-10-04 13:01:59,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-10-04 13:01:59,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-04 13:01:59,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-10-04 13:01:59,728 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 110 [2018-10-04 13:01:59,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:01:59,728 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-10-04 13:01:59,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-10-04 13:01:59,729 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-10-04 13:01:59,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-10-04 13:01:59,729 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:01:59,729 INFO L375 BasicCegarLoop]: trace histogram [108, 1, 1, 1] [2018-10-04 13:01:59,729 INFO L423 AbstractCegarLoop]: === Iteration 109 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:01:59,729 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:01:59,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1271178720, now seen corresponding path program 108 times [2018-10-04 13:01:59,730 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:01:59,730 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:01:59,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:59,730 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:01:59,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:59,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:02:00,120 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:02:00,492 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:02:01,095 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:02:02,080 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 13:02:03,286 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 13:02:04,741 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 13:02:05,409 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 0 proven. 5886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:02:05,410 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:02:05,410 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:02:05,418 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 13:02:05,525 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-10-04 13:02:05,526 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:02:05,529 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:02:05,716 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 0 proven. 5886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:02:05,736 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:02:05,737 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 110] total 110 [2018-10-04 13:02:05,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 111 states [2018-10-04 13:02:05,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2018-10-04 13:02:05,738 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:02:05,738 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 111 states. [2018-10-04 13:02:06,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:02:06,106 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-10-04 13:02:06,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-10-04 13:02:06,107 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 111 [2018-10-04 13:02:06,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:02:06,107 INFO L225 Difference]: With dead ends: 115 [2018-10-04 13:02:06,107 INFO L226 Difference]: Without dead ends: 113 [2018-10-04 13:02:06,107 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.7s Time 5.1s impTime 15 [2018-10-04 13:02:06,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-04 13:02:06,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-10-04 13:02:06,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-10-04 13:02:06,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-10-04 13:02:06,109 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 111 [2018-10-04 13:02:06,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:02:06,109 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-10-04 13:02:06,109 INFO L481 AbstractCegarLoop]: Interpolant automaton has 111 states. [2018-10-04 13:02:06,110 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-10-04 13:02:06,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-04 13:02:06,110 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:02:06,110 INFO L375 BasicCegarLoop]: trace histogram [109, 1, 1, 1] [2018-10-04 13:02:06,110 INFO L423 AbstractCegarLoop]: === Iteration 110 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:02:06,110 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:02:06,111 INFO L82 PathProgramCache]: Analyzing trace with hash 751830790, now seen corresponding path program 109 times [2018-10-04 13:02:06,111 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:02:06,111 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:02:06,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:02:06,112 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:02:06,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:02:06,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:02:06,386 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:02:06,726 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:02:06,925 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:02:07,425 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 13:02:08,170 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 13:02:09,163 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 13:02:09,705 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:02:09,705 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:02:09,705 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:02:09,712 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 13:02:09,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:02:09,777 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:02:09,961 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:02:09,980 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:02:09,980 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 111] total 111 [2018-10-04 13:02:09,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-10-04 13:02:09,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-10-04 13:02:09,982 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:02:09,982 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 112 states. [2018-10-04 13:02:10,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:02:10,270 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2018-10-04 13:02:10,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-10-04 13:02:10,270 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 112 [2018-10-04 13:02:10,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:02:10,271 INFO L225 Difference]: With dead ends: 116 [2018-10-04 13:02:10,271 INFO L226 Difference]: Without dead ends: 114 [2018-10-04 13:02:10,271 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s Time 3.1s impTime 16 [2018-10-04 13:02:10,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-10-04 13:02:10,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-10-04 13:02:10,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-10-04 13:02:10,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2018-10-04 13:02:10,273 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 112 [2018-10-04 13:02:10,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:02:10,274 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2018-10-04 13:02:10,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-10-04 13:02:10,274 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2018-10-04 13:02:10,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-10-04 13:02:10,274 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:02:10,275 INFO L375 BasicCegarLoop]: trace histogram [110, 1, 1, 1] [2018-10-04 13:02:10,275 INFO L423 AbstractCegarLoop]: === Iteration 111 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:02:10,275 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:02:10,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1831914144, now seen corresponding path program 110 times [2018-10-04 13:02:10,275 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:02:10,275 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:02:10,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:02:10,276 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 13:02:10,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:02:10,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:02:10,535 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:02:10,928 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:02:11,491 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:02:12,370 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 13:02:12,609 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 13:02:13,515 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 13:02:14,367 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:02:14,368 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 13:02:14,368 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 13:02:14,375 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 13:02:14,435 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 13:02:14,435 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:02:14,438 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:02:14,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 13:02:14,636 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 13:02:14,637 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 112] total 112 [2018-10-04 13:02:14,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-10-04 13:02:14,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-10-04 13:02:14,638 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:02:14,638 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 113 states. [2018-10-04 13:02:14,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:02:14,952 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-10-04 13:02:14,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-10-04 13:02:14,953 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 113 [2018-10-04 13:02:14,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:02:14,953 INFO L225 Difference]: With dead ends: 117 [2018-10-04 13:02:14,953 INFO L226 Difference]: Without dead ends: 115 [2018-10-04 13:02:14,954 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s Time 3.5s impTime 17 [2018-10-04 13:02:14,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-10-04 13:02:14,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-10-04 13:02:14,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-04 13:02:14,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-10-04 13:02:14,956 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 113 [2018-10-04 13:02:14,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:02:14,956 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-10-04 13:02:14,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-10-04 13:02:14,956 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-10-04 13:02:14,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-04 13:02:14,957 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:02:14,957 INFO L375 BasicCegarLoop]: trace histogram [111, 1, 1, 1] [2018-10-04 13:02:14,957 INFO L423 AbstractCegarLoop]: === Iteration 112 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 13:02:14,957 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:02:14,958 INFO L82 PathProgramCache]: Analyzing trace with hash 954759750, now seen corresponding path program 111 times [2018-10-04 13:02:14,958 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:02:14,958 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:02:14,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:02:14,958 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:02:14,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:02:14,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:02:15,378 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 13:02:15,602 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:02:15,946 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 13:02:16,930 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 Received shutdown request... [2018-10-04 13:02:16,996 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-04 13:02:17,001 WARN L205 ceAbstractionStarter]: Timeout [2018-10-04 13:02:17,001 INFO L202 PluginConnector]: Adding new model Octopussy.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.10 01:02:17 BoogieIcfgContainer [2018-10-04 13:02:17,001 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-04 13:02:17,002 INFO L168 Benchmark]: Toolchain (without parser) took 235953.81 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -136.3 MB). Free memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: 411.6 MB). Peak memory consumption was 275.2 MB. Max. memory is 7.1 GB. [2018-10-04 13:02:17,003 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.18 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 13:02:17,004 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.50 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 13:02:17,004 INFO L168 Benchmark]: Boogie Preprocessor took 21.44 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 13:02:17,004 INFO L168 Benchmark]: RCFGBuilder took 285.37 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-04 13:02:17,005 INFO L168 Benchmark]: TraceAbstraction took 235598.59 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -136.3 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 390.4 MB). Peak memory consumption was 254.1 MB. Max. memory is 7.1 GB. [2018-10-04 13:02:17,008 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 0.18 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 44.50 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 21.44 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 285.37 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 235598.59 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -136.3 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 390.4 MB). Peak memory consumption was 254.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 26]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 26). Cancelled while BasicCegarLoop was analyzing trace of length 115 with TraceHistMax 111, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while NestedInterpolantsBuilder was constructing predicates for 113 interpolants. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 235.5s OverallTime, 112 OverallIterations, 111 TraceHistogramMax, 17.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 335 SDtfs, 2 SDslu, 4461 SDs, 0 SdLazy, 10788 SolverSat, 157 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 10.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12652 GetRequests, 6436 SyntacticMatches, 0 SemanticMatches, 6216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 200.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=115occurred in iteration=111, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 111 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.6s SsaConstructionTime, 6.0s SatisfiabilityAnalysisTime, 204.8s InterpolantComputationTime, 12873 NumberOfCodeBlocks, 12873 NumberOfCodeBlocksAsserted, 1779 NumberOfCheckSat, 12652 ConstructedInterpolants, 0 QuantifiedInterpolants, 2822278 SizeOfPredicates, 110 NumberOfNonLiveVariables, 25410 ConjunctsInSsa, 6325 ConjunctsInUnsatCore, 221 InterpolantComputations, 1 PerfectInterpolantSequences, 0/455840 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/Octopussy.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-04_13-02-17-017.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Octopussy.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-04_13-02-17-017.csv Completed graceful shutdown