java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/array1.i_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-c372c2b [2018-10-02 12:08:38,031 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-02 12:08:38,033 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-02 12:08:38,045 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-02 12:08:38,045 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-02 12:08:38,046 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-02 12:08:38,048 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-02 12:08:38,049 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-02 12:08:38,051 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-02 12:08:38,052 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-02 12:08:38,053 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-02 12:08:38,053 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-02 12:08:38,054 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-02 12:08:38,055 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-02 12:08:38,056 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-02 12:08:38,057 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-02 12:08:38,058 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-02 12:08:38,060 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-02 12:08:38,062 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-02 12:08:38,063 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-02 12:08:38,065 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-02 12:08:38,066 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-02 12:08:38,068 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-02 12:08:38,069 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-02 12:08:38,069 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-02 12:08:38,070 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-02 12:08:38,071 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-02 12:08:38,072 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-02 12:08:38,073 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-02 12:08:38,074 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-02 12:08:38,075 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-02 12:08:38,075 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-02 12:08:38,076 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-02 12:08:38,076 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-02 12:08:38,079 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-02 12:08:38,080 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-02 12:08:38,080 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 [2018-10-02 12:08:38,109 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-02 12:08:38,109 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-02 12:08:38,114 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-02 12:08:38,114 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-02 12:08:38,115 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-02 12:08:38,115 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-02 12:08:38,115 INFO L133 SettingsManager]: * Use SBE=true [2018-10-02 12:08:38,117 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-02 12:08:38,117 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-02 12:08:38,117 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-02 12:08:38,117 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-02 12:08:38,117 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-02 12:08:38,118 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-02 12:08:38,118 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-02 12:08:38,118 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-02 12:08:38,118 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-02 12:08:38,118 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-02 12:08:38,120 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-02 12:08:38,120 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-02 12:08:38,120 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-02 12:08:38,120 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-02 12:08:38,121 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-02 12:08:38,121 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-02 12:08:38,121 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-02 12:08:38,121 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-02 12:08:38,122 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-02 12:08:38,122 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-02 12:08:38,122 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-02 12:08:38,122 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-02 12:08:38,123 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-02 12:08:38,123 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-10-02 12:08:38,189 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-02 12:08:38,203 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-02 12:08:38,210 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-02 12:08:38,211 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-02 12:08:38,212 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-02 12:08:38,213 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/array1.i_3.bpl [2018-10-02 12:08:38,213 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/array1.i_3.bpl' [2018-10-02 12:08:38,267 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-02 12:08:38,271 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-02 12:08:38,272 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-02 12:08:38,272 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-02 12:08:38,272 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-02 12:08:38,294 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:08:38" (1/1) ... [2018-10-02 12:08:38,308 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:08:38" (1/1) ... [2018-10-02 12:08:38,315 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-02 12:08:38,316 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-02 12:08:38,316 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-02 12:08:38,316 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-02 12:08:38,327 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:08:38" (1/1) ... [2018-10-02 12:08:38,328 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:08:38" (1/1) ... [2018-10-02 12:08:38,328 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:08:38" (1/1) ... [2018-10-02 12:08:38,329 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:08:38" (1/1) ... [2018-10-02 12:08:38,331 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:08:38" (1/1) ... [2018-10-02 12:08:38,333 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:08:38" (1/1) ... [2018-10-02 12:08:38,334 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:08:38" (1/1) ... [2018-10-02 12:08:38,335 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-02 12:08:38,336 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-02 12:08:38,336 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-02 12:08:38,336 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-02 12:08:38,337 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:08:38" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-02 12:08:38,398 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-02 12:08:38,398 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-02 12:08:38,609 INFO L340 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-02 12:08:38,609 INFO L202 PluginConnector]: Adding new model array1.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 12:08:38 BoogieIcfgContainer [2018-10-02 12:08:38,610 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-02 12:08:38,611 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-02 12:08:38,611 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-02 12:08:38,614 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-02 12:08:38,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:08:38" (1/2) ... [2018-10-02 12:08:38,615 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31e68470 and model type array1.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 12:08:38, skipping insertion in model container [2018-10-02 12:08:38,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 12:08:38" (2/2) ... [2018-10-02 12:08:38,617 INFO L112 eAbstractionObserver]: Analyzing ICFG array1.i_3.bpl [2018-10-02 12:08:38,628 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-02 12:08:38,639 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-02 12:08:38,689 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-02 12:08:38,690 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-02 12:08:38,690 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-02 12:08:38,690 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-02 12:08:38,690 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-02 12:08:38,690 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-02 12:08:38,691 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-02 12:08:38,691 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-02 12:08:38,691 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-02 12:08:38,705 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-10-02 12:08:38,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-02 12:08:38,712 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:38,713 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-10-02 12:08:38,714 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:38,723 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:38,723 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-10-02 12:08:38,725 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:38,726 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:38,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:38,771 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:08:38,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:38,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:38,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:38,864 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-02 12:08:38,865 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-02 12:08:38,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-02 12:08:38,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-02 12:08:38,882 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:38,884 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-10-02 12:08:39,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:39,033 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-10-02 12:08:39,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-02 12:08:39,039 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-10-02 12:08:39,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:39,065 INFO L225 Difference]: With dead ends: 11 [2018-10-02 12:08:39,065 INFO L226 Difference]: Without dead ends: 7 [2018-10-02 12:08:39,068 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 [2018-10-02 12:08:39,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-02 12:08:39,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-02 12:08:39,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-02 12:08:39,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-10-02 12:08:39,116 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-10-02 12:08:39,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:39,116 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-10-02 12:08:39,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-02 12:08:39,116 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-10-02 12:08:39,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-02 12:08:39,117 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:39,117 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-10-02 12:08:39,117 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:39,117 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:39,117 INFO L82 PathProgramCache]: Analyzing trace with hash 889591169, now seen corresponding path program 1 times [2018-10-02 12:08:39,117 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:39,118 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:39,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:39,119 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:08:39,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:39,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:39,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:39,173 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:39,173 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:39,184 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:08:39,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:39,224 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:39,263 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:39,285 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:39,285 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-10-02 12:08:39,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-02 12:08:39,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-02 12:08:39,286 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:39,287 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 4 states. [2018-10-02 12:08:39,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:39,363 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-02 12:08:39,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-02 12:08:39,364 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-10-02 12:08:39,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:39,364 INFO L225 Difference]: With dead ends: 11 [2018-10-02 12:08:39,365 INFO L226 Difference]: Without dead ends: 9 [2018-10-02 12:08:39,365 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime [2018-10-02 12:08:39,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-02 12:08:39,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-02 12:08:39,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-02 12:08:39,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-10-02 12:08:39,369 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-10-02 12:08:39,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:39,369 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-10-02 12:08:39,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-02 12:08:39,369 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-10-02 12:08:39,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-02 12:08:39,370 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:39,370 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2018-10-02 12:08:39,370 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:39,371 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:39,371 INFO L82 PathProgramCache]: Analyzing trace with hash 198673595, now seen corresponding path program 2 times [2018-10-02 12:08:39,371 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:39,371 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:39,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:39,372 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:08:39,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:39,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:39,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:39,460 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:39,460 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:39,471 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:08:39,484 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:08:39,485 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:39,488 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:39,588 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:39,608 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:39,609 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-02 12:08:39,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-02 12:08:39,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-02 12:08:39,609 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:39,609 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-10-02 12:08:39,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:39,762 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-10-02 12:08:39,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-02 12:08:39,762 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-10-02 12:08:39,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:39,763 INFO L225 Difference]: With dead ends: 13 [2018-10-02 12:08:39,763 INFO L226 Difference]: Without dead ends: 11 [2018-10-02 12:08:39,764 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime [2018-10-02 12:08:39,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-02 12:08:39,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-02 12:08:39,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-02 12:08:39,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-02 12:08:39,768 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-10-02 12:08:39,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:39,768 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-02 12:08:39,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-02 12:08:39,769 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-02 12:08:39,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-02 12:08:39,769 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:39,769 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2018-10-02 12:08:39,770 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:39,770 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:39,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1946815861, now seen corresponding path program 3 times [2018-10-02 12:08:39,770 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:39,770 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:39,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:39,772 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:39,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:39,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:40,050 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:40,050 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:40,050 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:40,063 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:08:40,098 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-02 12:08:40,098 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:40,100 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:40,186 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:40,207 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:40,207 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-02 12:08:40,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-02 12:08:40,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-02 12:08:40,208 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:40,208 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2018-10-02 12:08:40,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:40,281 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-10-02 12:08:40,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-02 12:08:40,283 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-10-02 12:08:40,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:40,284 INFO L225 Difference]: With dead ends: 15 [2018-10-02 12:08:40,284 INFO L226 Difference]: Without dead ends: 13 [2018-10-02 12:08:40,284 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime [2018-10-02 12:08:40,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-02 12:08:40,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-02 12:08:40,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-02 12:08:40,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-10-02 12:08:40,289 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-10-02 12:08:40,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:40,289 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-10-02 12:08:40,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-02 12:08:40,289 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-10-02 12:08:40,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-02 12:08:40,290 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:40,290 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1] [2018-10-02 12:08:40,291 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:40,291 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:40,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1715646545, now seen corresponding path program 4 times [2018-10-02 12:08:40,291 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:40,292 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:40,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:40,293 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:40,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:40,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:40,474 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:40,476 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:40,476 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:40,485 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:08:40,497 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:08:40,497 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:40,499 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:40,556 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:40,578 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:40,578 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-02 12:08:40,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-02 12:08:40,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-02 12:08:40,579 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:40,579 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2018-10-02 12:08:40,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:40,638 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-10-02 12:08:40,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-02 12:08:40,639 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-10-02 12:08:40,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:40,640 INFO L225 Difference]: With dead ends: 17 [2018-10-02 12:08:40,640 INFO L226 Difference]: Without dead ends: 15 [2018-10-02 12:08:40,641 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime [2018-10-02 12:08:40,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-02 12:08:40,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-02 12:08:40,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-02 12:08:40,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-02 12:08:40,645 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-10-02 12:08:40,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:40,646 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-02 12:08:40,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-02 12:08:40,646 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-02 12:08:40,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-02 12:08:40,647 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:40,647 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1] [2018-10-02 12:08:40,647 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:40,648 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:40,648 INFO L82 PathProgramCache]: Analyzing trace with hash 531164009, now seen corresponding path program 5 times [2018-10-02 12:08:40,648 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:40,648 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:40,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:40,649 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:40,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:40,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:40,745 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:40,746 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:40,746 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:40,758 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:08:40,826 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-02 12:08:40,827 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:40,829 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:41,235 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:41,257 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:41,257 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-02 12:08:41,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-02 12:08:41,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-02 12:08:41,258 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:41,258 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2018-10-02 12:08:41,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:41,380 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-02 12:08:41,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-02 12:08:41,382 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-10-02 12:08:41,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:41,383 INFO L225 Difference]: With dead ends: 19 [2018-10-02 12:08:41,383 INFO L226 Difference]: Without dead ends: 17 [2018-10-02 12:08:41,384 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.0s impTime [2018-10-02 12:08:41,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-02 12:08:41,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-02 12:08:41,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-02 12:08:41,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-02 12:08:41,388 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-10-02 12:08:41,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:41,388 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-02 12:08:41,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-02 12:08:41,388 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-02 12:08:41,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-02 12:08:41,389 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:41,389 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1] [2018-10-02 12:08:41,389 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:41,390 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:41,390 INFO L82 PathProgramCache]: Analyzing trace with hash -652443485, now seen corresponding path program 6 times [2018-10-02 12:08:41,390 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:41,390 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:41,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:41,391 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:41,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:41,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:41,521 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:41,522 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:41,522 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:41,533 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:08:41,546 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-02 12:08:41,546 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:41,548 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:41,600 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:41,622 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:41,623 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 12:08:41,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 12:08:41,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 12:08:41,624 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:41,624 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2018-10-02 12:08:41,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:41,760 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-02 12:08:41,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 12:08:41,761 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-10-02 12:08:41,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:41,762 INFO L225 Difference]: With dead ends: 21 [2018-10-02 12:08:41,762 INFO L226 Difference]: Without dead ends: 19 [2018-10-02 12:08:41,762 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime [2018-10-02 12:08:41,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-02 12:08:41,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-02 12:08:41,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-02 12:08:41,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-02 12:08:41,766 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-10-02 12:08:41,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:41,767 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-02 12:08:41,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 12:08:41,767 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-02 12:08:41,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-02 12:08:41,768 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:41,768 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1] [2018-10-02 12:08:41,768 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:41,768 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:41,769 INFO L82 PathProgramCache]: Analyzing trace with hash 67088221, now seen corresponding path program 7 times [2018-10-02 12:08:41,769 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:41,769 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:41,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:41,770 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:41,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:41,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:41,911 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:41,911 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:41,911 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:41,921 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:08:41,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:41,947 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:42,147 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:42,173 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:42,173 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 12:08:42,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 12:08:42,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 12:08:42,174 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:42,174 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2018-10-02 12:08:42,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:42,278 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-02 12:08:42,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 12:08:42,278 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-10-02 12:08:42,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:42,279 INFO L225 Difference]: With dead ends: 23 [2018-10-02 12:08:42,279 INFO L226 Difference]: Without dead ends: 21 [2018-10-02 12:08:42,279 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.0s impTime [2018-10-02 12:08:42,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-02 12:08:42,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-02 12:08:42,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-02 12:08:42,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-02 12:08:42,283 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2018-10-02 12:08:42,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:42,284 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-02 12:08:42,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 12:08:42,284 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-02 12:08:42,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-02 12:08:42,285 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:42,285 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1] [2018-10-02 12:08:42,285 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:42,285 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:42,286 INFO L82 PathProgramCache]: Analyzing trace with hash 47323031, now seen corresponding path program 8 times [2018-10-02 12:08:42,286 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:42,286 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:42,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:42,287 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:08:42,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:42,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:42,435 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:42,435 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:42,436 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:42,447 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:08:42,478 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:08:42,479 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:42,480 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:42,555 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:42,578 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:42,578 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 12:08:42,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 12:08:42,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 12:08:42,579 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:42,579 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 11 states. [2018-10-02 12:08:42,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:42,656 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-02 12:08:42,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 12:08:42,662 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-10-02 12:08:42,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:42,662 INFO L225 Difference]: With dead ends: 25 [2018-10-02 12:08:42,663 INFO L226 Difference]: Without dead ends: 23 [2018-10-02 12:08:42,663 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime [2018-10-02 12:08:42,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-02 12:08:42,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-02 12:08:42,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-02 12:08:42,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-02 12:08:42,667 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2018-10-02 12:08:42,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:42,668 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-02 12:08:42,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 12:08:42,668 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-02 12:08:42,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-02 12:08:42,669 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:42,669 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1] [2018-10-02 12:08:42,669 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:42,669 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:42,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1767155375, now seen corresponding path program 9 times [2018-10-02 12:08:42,670 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:42,670 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:42,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:42,671 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:42,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:42,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:42,789 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:42,790 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:42,790 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:42,799 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:08:42,819 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-02 12:08:42,819 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:42,822 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:42,894 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:42,914 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:42,914 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-02 12:08:42,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-02 12:08:42,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-02 12:08:42,915 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:42,915 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 12 states. [2018-10-02 12:08:42,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:42,999 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-02 12:08:43,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-02 12:08:43,001 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-10-02 12:08:43,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:43,002 INFO L225 Difference]: With dead ends: 27 [2018-10-02 12:08:43,002 INFO L226 Difference]: Without dead ends: 25 [2018-10-02 12:08:43,002 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime [2018-10-02 12:08:43,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-02 12:08:43,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-02 12:08:43,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-02 12:08:43,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-10-02 12:08:43,006 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2018-10-02 12:08:43,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:43,006 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-10-02 12:08:43,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-02 12:08:43,007 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-10-02 12:08:43,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-02 12:08:43,007 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:43,007 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1] [2018-10-02 12:08:43,008 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:43,008 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:43,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1724181365, now seen corresponding path program 10 times [2018-10-02 12:08:43,008 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:43,008 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:43,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:43,009 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:43,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:43,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:43,140 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:43,140 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:43,140 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:43,159 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:08:43,182 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:08:43,183 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:43,184 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:43,282 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:43,303 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:43,303 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-02 12:08:43,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-02 12:08:43,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-02 12:08:43,304 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:43,304 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 13 states. [2018-10-02 12:08:43,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:43,374 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-02 12:08:43,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-02 12:08:43,374 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-10-02 12:08:43,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:43,375 INFO L225 Difference]: With dead ends: 29 [2018-10-02 12:08:43,376 INFO L226 Difference]: Without dead ends: 27 [2018-10-02 12:08:43,376 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime [2018-10-02 12:08:43,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-02 12:08:43,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-02 12:08:43,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-02 12:08:43,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-02 12:08:43,382 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2018-10-02 12:08:43,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:43,382 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-02 12:08:43,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-02 12:08:43,382 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-02 12:08:43,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-02 12:08:43,383 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:43,383 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1] [2018-10-02 12:08:43,384 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:43,384 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:43,384 INFO L82 PathProgramCache]: Analyzing trace with hash 919136581, now seen corresponding path program 11 times [2018-10-02 12:08:43,384 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:43,384 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:43,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:43,385 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:43,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:43,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:43,522 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:43,522 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:43,523 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:43,531 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:08:43,559 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-02 12:08:43,560 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:43,563 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:43,643 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:43,672 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:43,673 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-02 12:08:43,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-02 12:08:43,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-02 12:08:43,674 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:43,674 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 14 states. [2018-10-02 12:08:43,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:43,941 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-02 12:08:43,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-02 12:08:43,943 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-10-02 12:08:43,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:43,944 INFO L225 Difference]: With dead ends: 31 [2018-10-02 12:08:43,944 INFO L226 Difference]: Without dead ends: 29 [2018-10-02 12:08:43,944 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime [2018-10-02 12:08:43,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-02 12:08:43,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-02 12:08:43,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-02 12:08:43,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-02 12:08:43,948 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2018-10-02 12:08:43,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:43,949 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-02 12:08:43,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-02 12:08:43,949 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-02 12:08:43,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-02 12:08:43,950 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:43,950 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1] [2018-10-02 12:08:43,950 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:43,950 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:43,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1472956545, now seen corresponding path program 12 times [2018-10-02 12:08:43,951 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:43,951 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:43,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:43,952 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:43,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:43,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:44,269 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:44,269 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:44,270 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:44,277 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:08:44,305 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-02 12:08:44,305 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:44,307 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:44,505 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:44,526 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:44,526 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-02 12:08:44,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-02 12:08:44,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-02 12:08:44,526 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:44,527 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 15 states. [2018-10-02 12:08:44,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:44,623 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-02 12:08:44,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-02 12:08:44,626 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-10-02 12:08:44,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:44,626 INFO L225 Difference]: With dead ends: 33 [2018-10-02 12:08:44,627 INFO L226 Difference]: Without dead ends: 31 [2018-10-02 12:08:44,627 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.1s impTime [2018-10-02 12:08:44,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-02 12:08:44,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-02 12:08:44,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-02 12:08:44,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-10-02 12:08:44,632 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2018-10-02 12:08:44,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:44,632 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-10-02 12:08:44,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-02 12:08:44,632 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-10-02 12:08:44,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-02 12:08:44,633 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:44,633 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1] [2018-10-02 12:08:44,634 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:44,634 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:44,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1828020025, now seen corresponding path program 13 times [2018-10-02 12:08:44,634 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:44,634 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:44,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:44,635 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:44,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:44,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:44,824 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:44,825 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:44,825 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:44,835 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:08:44,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:44,850 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:44,984 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:45,005 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:45,006 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-02 12:08:45,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-02 12:08:45,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-02 12:08:45,006 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:45,006 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 16 states. [2018-10-02 12:08:45,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:45,122 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-10-02 12:08:45,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-02 12:08:45,123 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-10-02 12:08:45,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:45,124 INFO L225 Difference]: With dead ends: 35 [2018-10-02 12:08:45,124 INFO L226 Difference]: Without dead ends: 33 [2018-10-02 12:08:45,125 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime [2018-10-02 12:08:45,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-02 12:08:45,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-02 12:08:45,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-02 12:08:45,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-10-02 12:08:45,130 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2018-10-02 12:08:45,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:45,130 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-10-02 12:08:45,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-02 12:08:45,131 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-10-02 12:08:45,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-02 12:08:45,131 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:45,132 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1] [2018-10-02 12:08:45,132 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:45,132 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:45,132 INFO L82 PathProgramCache]: Analyzing trace with hash 85672051, now seen corresponding path program 14 times [2018-10-02 12:08:45,132 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:45,133 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:45,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:45,134 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:08:45,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:45,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:45,752 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:45,752 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:45,752 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:45,762 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:08:45,775 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:08:45,775 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:45,777 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:45,855 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:45,875 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:45,875 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-02 12:08:45,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-02 12:08:45,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-02 12:08:45,876 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:45,876 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 17 states. [2018-10-02 12:08:45,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:45,997 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-02 12:08:45,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-02 12:08:45,998 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-10-02 12:08:45,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:45,999 INFO L225 Difference]: With dead ends: 37 [2018-10-02 12:08:45,999 INFO L226 Difference]: Without dead ends: 35 [2018-10-02 12:08:45,999 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.4s impTime [2018-10-02 12:08:46,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-02 12:08:46,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-02 12:08:46,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-02 12:08:46,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-02 12:08:46,004 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2018-10-02 12:08:46,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:46,004 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-02 12:08:46,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-02 12:08:46,005 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-02 12:08:46,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-02 12:08:46,006 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:46,006 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1] [2018-10-02 12:08:46,006 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:46,006 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:46,006 INFO L82 PathProgramCache]: Analyzing trace with hash 726514477, now seen corresponding path program 15 times [2018-10-02 12:08:46,007 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:46,007 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:46,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:46,008 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:46,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:46,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:46,286 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:46,286 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:46,286 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:46,296 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:08:46,483 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-02 12:08:46,483 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:46,486 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:46,701 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:46,721 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:46,721 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-02 12:08:46,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-02 12:08:46,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-02 12:08:46,722 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:46,722 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 18 states. [2018-10-02 12:08:46,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:46,854 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-10-02 12:08:46,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-02 12:08:46,856 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-10-02 12:08:46,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:46,857 INFO L225 Difference]: With dead ends: 39 [2018-10-02 12:08:46,857 INFO L226 Difference]: Without dead ends: 37 [2018-10-02 12:08:46,857 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.1s impTime [2018-10-02 12:08:46,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-02 12:08:46,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-02 12:08:46,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-02 12:08:46,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-10-02 12:08:46,861 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2018-10-02 12:08:46,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:46,862 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-10-02 12:08:46,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-02 12:08:46,862 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-10-02 12:08:46,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-02 12:08:46,863 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:46,863 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1] [2018-10-02 12:08:46,863 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:46,863 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:46,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1899204761, now seen corresponding path program 16 times [2018-10-02 12:08:46,863 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:46,863 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:46,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:46,864 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:46,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:46,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:47,159 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:47,159 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:47,160 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:47,167 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:08:47,193 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:08:47,194 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:47,196 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:47,423 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:47,443 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:47,443 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-02 12:08:47,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-02 12:08:47,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-02 12:08:47,444 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:47,444 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 19 states. [2018-10-02 12:08:47,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:47,565 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-10-02 12:08:47,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-02 12:08:47,566 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-10-02 12:08:47,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:47,566 INFO L225 Difference]: With dead ends: 41 [2018-10-02 12:08:47,567 INFO L226 Difference]: Without dead ends: 39 [2018-10-02 12:08:47,567 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.1s impTime [2018-10-02 12:08:47,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-02 12:08:47,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-02 12:08:47,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-02 12:08:47,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-10-02 12:08:47,572 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2018-10-02 12:08:47,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:47,573 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-10-02 12:08:47,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-02 12:08:47,573 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-10-02 12:08:47,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-02 12:08:47,573 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:47,574 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1] [2018-10-02 12:08:47,574 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:47,574 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:47,574 INFO L82 PathProgramCache]: Analyzing trace with hash 225377569, now seen corresponding path program 17 times [2018-10-02 12:08:47,574 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:47,574 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:47,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:47,575 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:47,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:47,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:48,336 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:48,337 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:48,337 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:48,348 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:08:48,396 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-02 12:08:48,397 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:48,398 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:48,683 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:48,703 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:48,704 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-02 12:08:48,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-02 12:08:48,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-02 12:08:48,705 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:48,705 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 20 states. [2018-10-02 12:08:48,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:48,866 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-02 12:08:48,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-02 12:08:48,867 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-10-02 12:08:48,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:48,867 INFO L225 Difference]: With dead ends: 43 [2018-10-02 12:08:48,867 INFO L226 Difference]: Without dead ends: 41 [2018-10-02 12:08:48,868 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.4s impTime [2018-10-02 12:08:48,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-02 12:08:48,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-02 12:08:48,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-02 12:08:48,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-10-02 12:08:48,873 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2018-10-02 12:08:48,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:48,873 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-10-02 12:08:48,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-02 12:08:48,873 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-10-02 12:08:48,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-02 12:08:48,874 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:48,874 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1] [2018-10-02 12:08:48,874 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:48,875 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:48,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1839531099, now seen corresponding path program 18 times [2018-10-02 12:08:48,875 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:48,875 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:48,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:48,876 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:48,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:48,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:49,238 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:49,238 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:49,238 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:49,245 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:08:49,288 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-02 12:08:49,288 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:49,290 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:49,745 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:49,781 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:49,781 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-02 12:08:49,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-02 12:08:49,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-02 12:08:49,782 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:49,782 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 21 states. [2018-10-02 12:08:50,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:50,088 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-10-02 12:08:50,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-02 12:08:50,089 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2018-10-02 12:08:50,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:50,089 INFO L225 Difference]: With dead ends: 45 [2018-10-02 12:08:50,090 INFO L226 Difference]: Without dead ends: 43 [2018-10-02 12:08:50,090 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.2s impTime [2018-10-02 12:08:50,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-02 12:08:50,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-02 12:08:50,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-02 12:08:50,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-10-02 12:08:50,094 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2018-10-02 12:08:50,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:50,094 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-10-02 12:08:50,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-02 12:08:50,094 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-10-02 12:08:50,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-02 12:08:50,095 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:50,095 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1] [2018-10-02 12:08:50,095 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:50,095 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:50,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1737087723, now seen corresponding path program 19 times [2018-10-02 12:08:50,095 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:50,095 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:50,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:50,096 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:50,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:50,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:50,467 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:50,468 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:50,468 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:50,476 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:08:50,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:50,496 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:50,568 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:50,589 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:50,589 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-02 12:08:50,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-02 12:08:50,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-02 12:08:50,590 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:50,590 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 22 states. [2018-10-02 12:08:50,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:50,723 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-10-02 12:08:50,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-02 12:08:50,723 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-10-02 12:08:50,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:50,724 INFO L225 Difference]: With dead ends: 47 [2018-10-02 12:08:50,725 INFO L226 Difference]: Without dead ends: 45 [2018-10-02 12:08:50,725 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime [2018-10-02 12:08:50,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-02 12:08:50,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-02 12:08:50,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-02 12:08:50,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-10-02 12:08:50,731 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2018-10-02 12:08:50,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:50,732 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-10-02 12:08:50,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-02 12:08:50,732 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-10-02 12:08:50,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-02 12:08:50,732 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:50,733 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1] [2018-10-02 12:08:50,733 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:50,733 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:50,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1401028431, now seen corresponding path program 20 times [2018-10-02 12:08:50,733 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:50,737 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:50,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:50,738 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:08:50,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:50,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:51,059 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:51,059 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:51,060 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:51,073 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:08:51,103 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:08:51,104 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:51,106 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:51,236 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:51,257 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:51,257 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-02 12:08:51,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-02 12:08:51,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-02 12:08:51,258 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:51,258 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 23 states. [2018-10-02 12:08:51,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:51,415 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-10-02 12:08:51,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-02 12:08:51,416 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2018-10-02 12:08:51,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:51,417 INFO L225 Difference]: With dead ends: 49 [2018-10-02 12:08:51,417 INFO L226 Difference]: Without dead ends: 47 [2018-10-02 12:08:51,417 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime [2018-10-02 12:08:51,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-02 12:08:51,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-02 12:08:51,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-02 12:08:51,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-10-02 12:08:51,422 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2018-10-02 12:08:51,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:51,422 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-10-02 12:08:51,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-02 12:08:51,423 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-10-02 12:08:51,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-02 12:08:51,423 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:51,423 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1] [2018-10-02 12:08:51,424 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:51,424 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:51,424 INFO L82 PathProgramCache]: Analyzing trace with hash 2063610633, now seen corresponding path program 21 times [2018-10-02 12:08:51,424 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:51,424 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:51,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:51,425 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:51,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:51,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:51,707 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:51,707 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:51,707 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:51,715 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:08:51,848 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-10-02 12:08:51,848 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:51,851 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:52,023 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:52,043 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:52,043 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-02 12:08:52,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-02 12:08:52,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-02 12:08:52,044 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:52,044 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 24 states. [2018-10-02 12:08:52,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:52,219 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-10-02 12:08:52,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-02 12:08:52,223 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-10-02 12:08:52,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:52,223 INFO L225 Difference]: With dead ends: 51 [2018-10-02 12:08:52,224 INFO L226 Difference]: Without dead ends: 49 [2018-10-02 12:08:52,224 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.1s impTime [2018-10-02 12:08:52,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-02 12:08:52,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-02 12:08:52,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-02 12:08:52,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-10-02 12:08:52,228 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2018-10-02 12:08:52,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:52,228 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-10-02 12:08:52,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-02 12:08:52,228 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-10-02 12:08:52,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-02 12:08:52,229 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:52,229 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1] [2018-10-02 12:08:52,229 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:52,229 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:52,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1145020349, now seen corresponding path program 22 times [2018-10-02 12:08:52,230 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:52,230 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:52,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:52,231 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:52,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:52,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:52,510 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:52,510 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:52,510 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:52,517 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:08:52,536 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:08:52,536 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:52,538 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:52,640 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:52,662 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:52,663 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-02 12:08:52,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-02 12:08:52,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-02 12:08:52,663 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:52,664 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 25 states. [2018-10-02 12:08:52,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:52,786 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-10-02 12:08:52,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-02 12:08:52,787 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2018-10-02 12:08:52,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:52,787 INFO L225 Difference]: With dead ends: 53 [2018-10-02 12:08:52,788 INFO L226 Difference]: Without dead ends: 51 [2018-10-02 12:08:52,788 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime [2018-10-02 12:08:52,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-02 12:08:52,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-02 12:08:52,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-02 12:08:52,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-10-02 12:08:52,792 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2018-10-02 12:08:52,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:52,793 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-10-02 12:08:52,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-02 12:08:52,793 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-10-02 12:08:52,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-02 12:08:52,793 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:52,793 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1] [2018-10-02 12:08:52,794 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:52,794 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:52,794 INFO L82 PathProgramCache]: Analyzing trace with hash -852875523, now seen corresponding path program 23 times [2018-10-02 12:08:52,794 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:52,794 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:52,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:52,795 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:52,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:52,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:53,486 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:53,486 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:53,486 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:53,494 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:08:53,578 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-10-02 12:08:53,579 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:53,580 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:53,772 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:53,793 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:53,793 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-02 12:08:53,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-02 12:08:53,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-02 12:08:53,794 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:53,794 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 26 states. [2018-10-02 12:08:53,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:53,884 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-10-02 12:08:53,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-02 12:08:53,885 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-10-02 12:08:53,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:53,885 INFO L225 Difference]: With dead ends: 55 [2018-10-02 12:08:53,886 INFO L226 Difference]: Without dead ends: 53 [2018-10-02 12:08:53,886 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.4s impTime [2018-10-02 12:08:53,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-02 12:08:53,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-02 12:08:53,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-02 12:08:53,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-10-02 12:08:53,890 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2018-10-02 12:08:53,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:53,890 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-10-02 12:08:53,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-02 12:08:53,891 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-10-02 12:08:53,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-02 12:08:53,891 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:53,891 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1] [2018-10-02 12:08:53,891 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:53,891 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:53,891 INFO L82 PathProgramCache]: Analyzing trace with hash 725428023, now seen corresponding path program 24 times [2018-10-02 12:08:53,891 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:53,892 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:53,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:53,892 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:53,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:53,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:54,205 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:54,205 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:54,205 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:54,212 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:08:54,272 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-02 12:08:54,273 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:54,275 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:54,511 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:54,531 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:54,532 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-02 12:08:54,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-02 12:08:54,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-02 12:08:54,532 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:54,532 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 27 states. [2018-10-02 12:08:54,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:54,708 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-10-02 12:08:54,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-02 12:08:54,708 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2018-10-02 12:08:54,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:54,709 INFO L225 Difference]: With dead ends: 57 [2018-10-02 12:08:54,709 INFO L226 Difference]: Without dead ends: 55 [2018-10-02 12:08:54,709 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.1s impTime [2018-10-02 12:08:54,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-02 12:08:54,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-10-02 12:08:54,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-02 12:08:54,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-10-02 12:08:54,713 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2018-10-02 12:08:54,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:54,713 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-10-02 12:08:54,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-02 12:08:54,713 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-10-02 12:08:54,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-02 12:08:54,714 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:54,714 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1] [2018-10-02 12:08:54,714 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:54,714 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:54,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1351680241, now seen corresponding path program 25 times [2018-10-02 12:08:54,715 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:54,715 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:54,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:54,716 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:54,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:54,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:55,337 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:55,338 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:55,338 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:55,346 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:08:55,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:55,367 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:55,458 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:55,479 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:55,479 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-02 12:08:55,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-02 12:08:55,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-02 12:08:55,480 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:55,480 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 28 states. [2018-10-02 12:08:55,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:55,638 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-10-02 12:08:55,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-02 12:08:55,639 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-10-02 12:08:55,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:55,639 INFO L225 Difference]: With dead ends: 59 [2018-10-02 12:08:55,639 INFO L226 Difference]: Without dead ends: 57 [2018-10-02 12:08:55,640 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.4s impTime [2018-10-02 12:08:55,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-02 12:08:55,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-02 12:08:55,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-02 12:08:55,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-10-02 12:08:55,643 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2018-10-02 12:08:55,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:55,644 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-10-02 12:08:55,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-02 12:08:55,644 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-10-02 12:08:55,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-02 12:08:55,644 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:55,644 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1] [2018-10-02 12:08:55,645 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:55,645 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:55,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1884640299, now seen corresponding path program 26 times [2018-10-02 12:08:55,645 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:55,645 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:55,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:55,646 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:08:55,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:55,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:56,048 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:56,048 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:56,048 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:56,056 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:08:56,077 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:08:56,078 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:56,080 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:56,230 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:56,251 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:56,251 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-02 12:08:56,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-02 12:08:56,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-02 12:08:56,252 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:56,252 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 29 states. [2018-10-02 12:08:56,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:56,404 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-10-02 12:08:56,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-02 12:08:56,405 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2018-10-02 12:08:56,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:56,406 INFO L225 Difference]: With dead ends: 61 [2018-10-02 12:08:56,406 INFO L226 Difference]: Without dead ends: 59 [2018-10-02 12:08:56,406 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.2s impTime [2018-10-02 12:08:56,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-02 12:08:56,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-02 12:08:56,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-02 12:08:56,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-10-02 12:08:56,409 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2018-10-02 12:08:56,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:56,409 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-10-02 12:08:56,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-02 12:08:56,410 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-10-02 12:08:56,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-02 12:08:56,410 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:56,410 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1] [2018-10-02 12:08:56,411 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:56,411 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:56,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1336819483, now seen corresponding path program 27 times [2018-10-02 12:08:56,411 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:56,411 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:56,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:56,412 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:56,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:56,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:56,801 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:56,801 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:56,801 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:56,810 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:08:56,892 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-10-02 12:08:56,892 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:56,894 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:57,039 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:57,060 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:57,060 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-02 12:08:57,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-02 12:08:57,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-02 12:08:57,061 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:57,061 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 30 states. [2018-10-02 12:08:57,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:57,306 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-10-02 12:08:57,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-02 12:08:57,306 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-10-02 12:08:57,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:57,307 INFO L225 Difference]: With dead ends: 63 [2018-10-02 12:08:57,307 INFO L226 Difference]: Without dead ends: 61 [2018-10-02 12:08:57,308 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime [2018-10-02 12:08:57,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-02 12:08:57,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-02 12:08:57,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-02 12:08:57,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-10-02 12:08:57,313 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2018-10-02 12:08:57,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:57,313 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-10-02 12:08:57,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-02 12:08:57,313 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-10-02 12:08:57,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-02 12:08:57,314 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:57,314 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1] [2018-10-02 12:08:57,314 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:57,319 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:57,320 INFO L82 PathProgramCache]: Analyzing trace with hash -488249569, now seen corresponding path program 28 times [2018-10-02 12:08:57,320 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:57,320 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:57,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:57,321 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:57,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:57,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:57,865 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:57,865 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:57,865 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:57,874 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:08:57,900 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:08:57,900 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:57,903 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:58,043 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:58,063 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:58,064 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-02 12:08:58,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-02 12:08:58,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-02 12:08:58,064 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:58,064 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 31 states. [2018-10-02 12:08:58,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:58,290 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-10-02 12:08:58,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-02 12:08:58,290 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2018-10-02 12:08:58,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:58,291 INFO L225 Difference]: With dead ends: 65 [2018-10-02 12:08:58,291 INFO L226 Difference]: Without dead ends: 63 [2018-10-02 12:08:58,291 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.4s impTime [2018-10-02 12:08:58,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-02 12:08:58,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-10-02 12:08:58,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-02 12:08:58,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-10-02 12:08:58,294 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2018-10-02 12:08:58,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:58,295 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-10-02 12:08:58,295 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-02 12:08:58,295 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-10-02 12:08:58,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-02 12:08:58,295 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:58,295 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1] [2018-10-02 12:08:58,296 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:58,296 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:58,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1056348455, now seen corresponding path program 29 times [2018-10-02 12:08:58,296 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:58,296 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:58,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:58,297 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:58,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:58,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:58,629 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:58,630 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:08:58,630 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:08:58,644 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:08:58,805 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-10-02 12:08:58,805 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:58,807 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:58,914 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:58,934 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:08:58,934 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-02 12:08:58,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-02 12:08:58,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-02 12:08:58,935 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:58,935 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 32 states. [2018-10-02 12:08:59,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:59,068 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-10-02 12:08:59,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-02 12:08:59,068 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-10-02 12:08:59,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:59,069 INFO L225 Difference]: With dead ends: 67 [2018-10-02 12:08:59,069 INFO L226 Difference]: Without dead ends: 65 [2018-10-02 12:08:59,070 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.2s impTime [2018-10-02 12:08:59,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-02 12:08:59,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-10-02 12:08:59,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-02 12:08:59,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-10-02 12:08:59,072 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2018-10-02 12:08:59,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:59,073 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-10-02 12:08:59,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-02 12:08:59,073 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-10-02 12:08:59,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-02 12:08:59,073 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:59,073 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1] [2018-10-02 12:08:59,073 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:59,073 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:59,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1538531309, now seen corresponding path program 30 times [2018-10-02 12:08:59,074 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:59,074 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:59,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:59,074 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:59,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:59,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:09:00,062 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:00,063 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:09:00,063 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:09:00,072 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:09:00,161 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-02 12:09:00,161 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:09:00,163 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:09:00,273 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:00,294 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:09:00,294 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-02 12:09:00,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-02 12:09:00,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-02 12:09:00,295 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:09:00,295 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 33 states. [2018-10-02 12:09:00,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:09:00,427 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-10-02 12:09:00,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-02 12:09:00,427 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2018-10-02 12:09:00,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:09:00,428 INFO L225 Difference]: With dead ends: 69 [2018-10-02 12:09:00,428 INFO L226 Difference]: Without dead ends: 67 [2018-10-02 12:09:00,429 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.7s impTime [2018-10-02 12:09:00,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-02 12:09:00,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-10-02 12:09:00,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-02 12:09:00,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-10-02 12:09:00,432 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2018-10-02 12:09:00,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:09:00,432 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-10-02 12:09:00,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-02 12:09:00,432 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-10-02 12:09:00,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-02 12:09:00,433 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:09:00,433 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1] [2018-10-02 12:09:00,433 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:09:00,433 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:09:00,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1059786035, now seen corresponding path program 31 times [2018-10-02 12:09:00,434 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:09:00,434 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:09:00,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:00,435 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:09:00,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:00,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:09:00,834 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:00,835 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:09:00,835 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:09:00,842 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:09:00,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:09:00,865 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:09:01,091 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:01,112 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:09:01,112 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-02 12:09:01,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-02 12:09:01,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-02 12:09:01,113 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:09:01,113 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 34 states. [2018-10-02 12:09:01,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:09:01,253 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-10-02 12:09:01,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-02 12:09:01,254 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2018-10-02 12:09:01,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:09:01,255 INFO L225 Difference]: With dead ends: 71 [2018-10-02 12:09:01,255 INFO L226 Difference]: Without dead ends: 69 [2018-10-02 12:09:01,256 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.2s impTime [2018-10-02 12:09:01,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-02 12:09:01,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-10-02 12:09:01,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-02 12:09:01,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-10-02 12:09:01,259 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2018-10-02 12:09:01,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:09:01,259 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-10-02 12:09:01,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-02 12:09:01,259 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-10-02 12:09:01,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-02 12:09:01,259 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:09:01,259 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1] [2018-10-02 12:09:01,260 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:09:01,260 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:09:01,260 INFO L82 PathProgramCache]: Analyzing trace with hash -547078393, now seen corresponding path program 32 times [2018-10-02 12:09:01,260 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:09:01,260 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:09:01,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:01,261 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:09:01,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:01,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:09:01,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:01,861 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:09:01,861 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:09:01,869 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:09:01,894 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:09:01,895 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:09:01,897 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:09:02,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:02,042 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:09:02,042 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-02 12:09:02,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-02 12:09:02,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-02 12:09:02,043 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:09:02,043 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 35 states. [2018-10-02 12:09:02,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:09:02,269 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-10-02 12:09:02,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-02 12:09:02,270 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2018-10-02 12:09:02,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:09:02,271 INFO L225 Difference]: With dead ends: 73 [2018-10-02 12:09:02,271 INFO L226 Difference]: Without dead ends: 71 [2018-10-02 12:09:02,271 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.4s impTime [2018-10-02 12:09:02,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-02 12:09:02,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-10-02 12:09:02,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-02 12:09:02,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-10-02 12:09:02,275 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2018-10-02 12:09:02,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:09:02,276 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-10-02 12:09:02,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-02 12:09:02,276 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-10-02 12:09:02,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-02 12:09:02,277 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:09:02,277 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1] [2018-10-02 12:09:02,277 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:09:02,277 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:09:02,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1756273471, now seen corresponding path program 33 times [2018-10-02 12:09:02,277 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:09:02,278 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:09:02,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:02,278 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:09:02,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:02,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:09:02,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:02,909 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:09:02,909 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:09:02,916 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:09:03,028 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-10-02 12:09:03,028 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:09:03,030 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:09:03,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:03,185 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:09:03,185 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-02 12:09:03,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-02 12:09:03,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-02 12:09:03,186 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:09:03,186 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 36 states. [2018-10-02 12:09:03,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:09:03,351 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-10-02 12:09:03,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-02 12:09:03,351 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2018-10-02 12:09:03,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:09:03,352 INFO L225 Difference]: With dead ends: 75 [2018-10-02 12:09:03,353 INFO L226 Difference]: Without dead ends: 73 [2018-10-02 12:09:03,353 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.4s impTime [2018-10-02 12:09:03,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-02 12:09:03,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-10-02 12:09:03,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-02 12:09:03,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-10-02 12:09:03,356 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2018-10-02 12:09:03,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:09:03,356 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-10-02 12:09:03,357 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-02 12:09:03,357 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-10-02 12:09:03,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-02 12:09:03,357 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:09:03,357 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1] [2018-10-02 12:09:03,358 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:09:03,358 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:09:03,358 INFO L82 PathProgramCache]: Analyzing trace with hash 143393787, now seen corresponding path program 34 times [2018-10-02 12:09:03,358 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:09:03,358 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:09:03,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:03,359 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:09:03,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:03,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:09:03,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:03,858 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:09:03,858 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:09:03,865 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:09:03,888 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:09:03,888 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:09:03,890 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:09:03,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:04,019 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:09:04,020 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-02 12:09:04,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-02 12:09:04,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-02 12:09:04,020 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:09:04,020 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 37 states. [2018-10-02 12:09:04,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:09:04,254 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-10-02 12:09:04,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-02 12:09:04,255 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2018-10-02 12:09:04,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:09:04,256 INFO L225 Difference]: With dead ends: 77 [2018-10-02 12:09:04,256 INFO L226 Difference]: Without dead ends: 75 [2018-10-02 12:09:04,256 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime [2018-10-02 12:09:04,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-02 12:09:04,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-10-02 12:09:04,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-02 12:09:04,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-10-02 12:09:04,260 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2018-10-02 12:09:04,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:09:04,260 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-10-02 12:09:04,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-02 12:09:04,260 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-10-02 12:09:04,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-02 12:09:04,261 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:09:04,261 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1] [2018-10-02 12:09:04,261 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:09:04,261 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:09:04,261 INFO L82 PathProgramCache]: Analyzing trace with hash 362527925, now seen corresponding path program 35 times [2018-10-02 12:09:04,262 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:09:04,262 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:09:04,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:04,262 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:09:04,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:04,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:09:05,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:05,110 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:09:05,110 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:09:05,117 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:09:05,399 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-10-02 12:09:05,399 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:09:05,402 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:09:05,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:05,551 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:09:05,551 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-02 12:09:05,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-02 12:09:05,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-02 12:09:05,552 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:09:05,552 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 38 states. [2018-10-02 12:09:05,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:09:05,783 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-10-02 12:09:05,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-02 12:09:05,783 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2018-10-02 12:09:05,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:09:05,784 INFO L225 Difference]: With dead ends: 79 [2018-10-02 12:09:05,784 INFO L226 Difference]: Without dead ends: 77 [2018-10-02 12:09:05,785 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.6s impTime [2018-10-02 12:09:05,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-02 12:09:05,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-10-02 12:09:05,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-02 12:09:05,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-10-02 12:09:05,787 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2018-10-02 12:09:05,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:09:05,787 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-10-02 12:09:05,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-02 12:09:05,787 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-10-02 12:09:05,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-02 12:09:05,787 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:09:05,788 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1] [2018-10-02 12:09:05,788 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:09:05,788 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:09:05,788 INFO L82 PathProgramCache]: Analyzing trace with hash 497037039, now seen corresponding path program 36 times [2018-10-02 12:09:05,788 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:09:05,788 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:09:05,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:05,789 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:09:05,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:05,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:09:06,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:06,423 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:09:06,423 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:09:06,431 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:09:06,559 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-02 12:09:06,559 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:09:06,563 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:09:08,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:08,064 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:09:08,065 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-02 12:09:08,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-02 12:09:08,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-02 12:09:08,065 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:09:08,065 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 39 states. [2018-10-02 12:09:08,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:09:08,310 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-10-02 12:09:08,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-02 12:09:08,310 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2018-10-02 12:09:08,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:09:08,311 INFO L225 Difference]: With dead ends: 81 [2018-10-02 12:09:08,311 INFO L226 Difference]: Without dead ends: 79 [2018-10-02 12:09:08,312 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time 0.5s impTime [2018-10-02 12:09:08,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-02 12:09:08,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-10-02 12:09:08,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-02 12:09:08,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-10-02 12:09:08,315 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2018-10-02 12:09:08,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:09:08,315 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-10-02 12:09:08,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-02 12:09:08,315 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-10-02 12:09:08,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-02 12:09:08,316 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:09:08,316 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1] [2018-10-02 12:09:08,316 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:09:08,316 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:09:08,316 INFO L82 PathProgramCache]: Analyzing trace with hash 911276713, now seen corresponding path program 37 times [2018-10-02 12:09:08,317 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:09:08,317 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:09:08,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:08,317 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:09:08,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:08,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:09:09,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:09,293 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:09:09,293 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:09:09,301 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:09:09,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:09:09,334 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:09:09,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:09,506 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:09:09,506 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-02 12:09:09,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-02 12:09:09,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-02 12:09:09,507 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:09:09,507 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 40 states. [2018-10-02 12:09:09,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:09:09,939 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-10-02 12:09:09,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-02 12:09:09,940 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2018-10-02 12:09:09,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:09:09,940 INFO L225 Difference]: With dead ends: 83 [2018-10-02 12:09:09,940 INFO L226 Difference]: Without dead ends: 81 [2018-10-02 12:09:09,940 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.7s impTime [2018-10-02 12:09:09,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-02 12:09:09,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-10-02 12:09:09,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-10-02 12:09:09,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-10-02 12:09:09,943 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2018-10-02 12:09:09,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:09:09,944 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-10-02 12:09:09,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-02 12:09:09,944 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-10-02 12:09:09,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-02 12:09:09,945 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:09:09,945 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1] [2018-10-02 12:09:09,945 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:09:09,945 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:09:09,945 INFO L82 PathProgramCache]: Analyzing trace with hash -436355101, now seen corresponding path program 38 times [2018-10-02 12:09:09,945 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:09:09,946 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:09:09,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:09,946 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:09:09,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:09,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:09:10,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:10,692 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:09:10,692 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:09:10,700 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:09:10,730 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:09:10,730 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:09:10,732 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:09:10,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:10,910 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:09:10,910 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-02 12:09:10,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-02 12:09:10,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-02 12:09:10,911 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:09:10,911 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 41 states. [2018-10-02 12:09:11,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:09:11,198 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-10-02 12:09:11,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-02 12:09:11,199 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2018-10-02 12:09:11,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:09:11,200 INFO L225 Difference]: With dead ends: 85 [2018-10-02 12:09:11,200 INFO L226 Difference]: Without dead ends: 83 [2018-10-02 12:09:11,200 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.5s impTime [2018-10-02 12:09:11,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-02 12:09:11,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-10-02 12:09:11,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-02 12:09:11,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-10-02 12:09:11,206 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2018-10-02 12:09:11,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:09:11,206 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-10-02 12:09:11,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-02 12:09:11,206 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-10-02 12:09:11,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-02 12:09:11,207 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:09:11,207 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1] [2018-10-02 12:09:11,207 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:09:11,207 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:09:11,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1569595037, now seen corresponding path program 39 times [2018-10-02 12:09:11,207 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:09:11,208 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:09:11,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:11,208 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:09:11,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:11,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:09:11,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:11,763 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:09:11,763 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:09:11,771 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:09:11,948 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-10-02 12:09:11,948 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:09:11,951 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:09:12,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:12,123 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:09:12,123 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-02 12:09:12,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-02 12:09:12,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-02 12:09:12,124 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:09:12,124 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 42 states. [2018-10-02 12:09:12,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:09:12,355 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-10-02 12:09:12,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-02 12:09:12,356 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2018-10-02 12:09:12,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:09:12,357 INFO L225 Difference]: With dead ends: 87 [2018-10-02 12:09:12,357 INFO L226 Difference]: Without dead ends: 85 [2018-10-02 12:09:12,357 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.3s impTime [2018-10-02 12:09:12,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-10-02 12:09:12,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-10-02 12:09:12,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-02 12:09:12,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-10-02 12:09:12,361 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2018-10-02 12:09:12,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:09:12,361 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-10-02 12:09:12,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-02 12:09:12,361 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-10-02 12:09:12,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-02 12:09:12,362 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:09:12,362 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1] [2018-10-02 12:09:12,362 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:09:12,362 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:09:12,362 INFO L82 PathProgramCache]: Analyzing trace with hash 847361751, now seen corresponding path program 40 times [2018-10-02 12:09:12,362 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:09:12,362 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:09:12,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:12,363 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:09:12,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:12,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:09:14,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:14,272 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:09:14,272 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:09:14,280 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:09:14,335 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:09:14,336 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:09:14,338 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:09:14,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:14,885 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:09:14,885 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-02 12:09:14,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-02 12:09:14,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-02 12:09:14,886 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:09:14,886 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 43 states. [2018-10-02 12:09:15,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:09:15,276 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-10-02 12:09:15,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-02 12:09:15,277 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2018-10-02 12:09:15,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:09:15,278 INFO L225 Difference]: With dead ends: 89 [2018-10-02 12:09:15,278 INFO L226 Difference]: Without dead ends: 87 [2018-10-02 12:09:15,278 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s Time 1.5s impTime [2018-10-02 12:09:15,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-02 12:09:15,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-10-02 12:09:15,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-02 12:09:15,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-10-02 12:09:15,283 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2018-10-02 12:09:15,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:09:15,284 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-10-02 12:09:15,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-02 12:09:15,284 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-10-02 12:09:15,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-02 12:09:15,284 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:09:15,284 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1] [2018-10-02 12:09:15,285 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:09:15,285 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:09:15,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1729091439, now seen corresponding path program 41 times [2018-10-02 12:09:15,285 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:09:15,285 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:09:15,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:15,286 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:09:15,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:15,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:09:16,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:16,102 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:09:16,102 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:09:16,112 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:09:16,608 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-10-02 12:09:16,608 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:09:16,612 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:09:16,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:16,854 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:09:16,854 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-02 12:09:16,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-02 12:09:16,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-02 12:09:16,855 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:09:16,855 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 44 states. [2018-10-02 12:09:17,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:09:17,152 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-10-02 12:09:17,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-02 12:09:17,153 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2018-10-02 12:09:17,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:09:17,154 INFO L225 Difference]: With dead ends: 91 [2018-10-02 12:09:17,154 INFO L226 Difference]: Without dead ends: 89 [2018-10-02 12:09:17,154 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.6s impTime [2018-10-02 12:09:17,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-02 12:09:17,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-10-02 12:09:17,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-02 12:09:17,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-10-02 12:09:17,156 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2018-10-02 12:09:17,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:09:17,157 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-10-02 12:09:17,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-02 12:09:17,157 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-10-02 12:09:17,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-02 12:09:17,157 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:09:17,157 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1] [2018-10-02 12:09:17,158 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:09:17,158 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:09:17,158 INFO L82 PathProgramCache]: Analyzing trace with hash 495522763, now seen corresponding path program 42 times [2018-10-02 12:09:17,158 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:09:17,158 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:09:17,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:17,159 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:09:17,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:17,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:09:17,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:17,935 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:09:17,935 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:09:17,942 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:09:18,124 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-10-02 12:09:18,124 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:09:18,128 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:09:18,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:18,330 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:09:18,330 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-02 12:09:18,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-02 12:09:18,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-02 12:09:18,331 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:09:18,331 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 45 states. [2018-10-02 12:09:18,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:09:18,500 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-10-02 12:09:18,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-02 12:09:18,500 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 88 [2018-10-02 12:09:18,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:09:18,501 INFO L225 Difference]: With dead ends: 93 [2018-10-02 12:09:18,501 INFO L226 Difference]: Without dead ends: 91 [2018-10-02 12:09:18,502 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.6s impTime [2018-10-02 12:09:18,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-02 12:09:18,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-10-02 12:09:18,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-02 12:09:18,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-10-02 12:09:18,505 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2018-10-02 12:09:18,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:09:18,506 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-10-02 12:09:18,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-02 12:09:18,506 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-10-02 12:09:18,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-02 12:09:18,506 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:09:18,506 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1] [2018-10-02 12:09:18,507 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:09:18,507 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:09:18,507 INFO L82 PathProgramCache]: Analyzing trace with hash -543942523, now seen corresponding path program 43 times [2018-10-02 12:09:18,507 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:09:18,507 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:09:18,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:18,508 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:09:18,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:18,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:09:19,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:19,276 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:09:19,276 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:09:19,288 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:09:19,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:09:19,323 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:09:19,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:19,498 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:09:19,498 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-02 12:09:19,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-02 12:09:19,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-02 12:09:19,499 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:09:19,499 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 46 states. [2018-10-02 12:09:19,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:09:19,763 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-10-02 12:09:19,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-02 12:09:19,763 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2018-10-02 12:09:19,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:09:19,764 INFO L225 Difference]: With dead ends: 95 [2018-10-02 12:09:19,764 INFO L226 Difference]: Without dead ends: 93 [2018-10-02 12:09:19,765 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.6s impTime [2018-10-02 12:09:19,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-02 12:09:19,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-10-02 12:09:19,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-10-02 12:09:19,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-10-02 12:09:19,768 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2018-10-02 12:09:19,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:09:19,768 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-10-02 12:09:19,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-02 12:09:19,769 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-10-02 12:09:19,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-02 12:09:19,769 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:09:19,769 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1] [2018-10-02 12:09:19,769 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:09:19,769 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:09:19,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1257297599, now seen corresponding path program 44 times [2018-10-02 12:09:19,770 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:09:19,770 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:09:19,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:19,770 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:09:19,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:19,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:09:20,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:20,617 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:09:20,617 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 12:09:20,625 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:09:20,659 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:09:20,659 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:09:20,661 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:09:20,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:20,974 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:09:20,974 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-02 12:09:20,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-02 12:09:20,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-02 12:09:20,975 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:09:20,975 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 47 states. [2018-10-02 12:09:21,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:09:21,417 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-10-02 12:09:21,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-02 12:09:21,418 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 92 [2018-10-02 12:09:21,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:09:21,419 INFO L225 Difference]: With dead ends: 97 [2018-10-02 12:09:21,419 INFO L226 Difference]: Without dead ends: 95 [2018-10-02 12:09:21,419 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.6s impTime [2018-10-02 12:09:21,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-02 12:09:21,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-10-02 12:09:21,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-02 12:09:21,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-10-02 12:09:21,424 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2018-10-02 12:09:21,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:09:21,424 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-10-02 12:09:21,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-02 12:09:21,424 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-10-02 12:09:21,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-02 12:09:21,424 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:09:21,425 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1] [2018-10-02 12:09:21,425 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:09:21,425 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:09:21,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1377234553, now seen corresponding path program 45 times [2018-10-02 12:09:21,425 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:09:21,425 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:09:21,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:21,426 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:09:21,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:21,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:09:22,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:22,057 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:09:22,057 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 [2018-10-02 12:09:22,066 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:09:22,314 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-10-02 12:09:22,314 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:09:22,317 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:09:22,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:22,511 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:09:22,512 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-02 12:09:22,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-02 12:09:22,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-02 12:09:22,512 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:09:22,512 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 48 states. [2018-10-02 12:09:22,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:09:22,746 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-10-02 12:09:22,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-02 12:09:22,747 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2018-10-02 12:09:22,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:09:22,748 INFO L225 Difference]: With dead ends: 99 [2018-10-02 12:09:22,748 INFO L226 Difference]: Without dead ends: 97 [2018-10-02 12:09:22,748 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.4s impTime [2018-10-02 12:09:22,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-10-02 12:09:22,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-10-02 12:09:22,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-10-02 12:09:22,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-10-02 12:09:22,751 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2018-10-02 12:09:22,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:09:22,751 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-10-02 12:09:22,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-02 12:09:22,751 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-10-02 12:09:22,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-10-02 12:09:22,752 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:09:22,752 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1] [2018-10-02 12:09:22,752 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:09:22,752 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:09:22,752 INFO L82 PathProgramCache]: Analyzing trace with hash 672530355, now seen corresponding path program 46 times [2018-10-02 12:09:22,752 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:09:22,752 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:09:22,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:22,753 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:09:22,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:22,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:09:24,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:24,050 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:09:24,050 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 12:09:24,058 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:09:24,093 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:09:24,093 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:09:24,095 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:09:24,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:24,277 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:09:24,277 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-10-02 12:09:24,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-02 12:09:24,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-02 12:09:24,277 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:09:24,278 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 49 states. [2018-10-02 12:09:24,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:09:24,563 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-10-02 12:09:24,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-02 12:09:24,564 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2018-10-02 12:09:24,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:09:24,565 INFO L225 Difference]: With dead ends: 101 [2018-10-02 12:09:24,565 INFO L226 Difference]: Without dead ends: 99 [2018-10-02 12:09:24,565 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 1.0s impTime [2018-10-02 12:09:24,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-02 12:09:24,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-10-02 12:09:24,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-10-02 12:09:24,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-10-02 12:09:24,567 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2018-10-02 12:09:24,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:09:24,568 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-10-02 12:09:24,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-02 12:09:24,568 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-10-02 12:09:24,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-02 12:09:24,568 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:09:24,568 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1] [2018-10-02 12:09:24,568 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:09:24,568 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:09:24,569 INFO L82 PathProgramCache]: Analyzing trace with hash 2056628845, now seen corresponding path program 47 times [2018-10-02 12:09:24,569 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:09:24,569 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:09:24,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:24,569 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:09:24,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:24,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:09:25,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:25,600 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:09:25,601 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 [2018-10-02 12:09:25,607 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:09:26,412 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-10-02 12:09:26,412 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:09:26,415 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:09:26,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:26,599 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:09:26,599 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-02 12:09:26,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-02 12:09:26,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-02 12:09:26,600 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:09:26,600 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 50 states. [2018-10-02 12:09:26,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:09:26,835 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-10-02 12:09:26,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-02 12:09:26,836 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2018-10-02 12:09:26,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:09:26,837 INFO L225 Difference]: With dead ends: 103 [2018-10-02 12:09:26,837 INFO L226 Difference]: Without dead ends: 101 [2018-10-02 12:09:26,837 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.8s impTime [2018-10-02 12:09:26,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-02 12:09:26,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-10-02 12:09:26,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-02 12:09:26,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-10-02 12:09:26,841 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2018-10-02 12:09:26,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:09:26,841 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-10-02 12:09:26,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-02 12:09:26,841 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-10-02 12:09:26,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-02 12:09:26,842 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:09:26,842 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1] [2018-10-02 12:09:26,842 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:09:26,842 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:09:26,842 INFO L82 PathProgramCache]: Analyzing trace with hash 735415975, now seen corresponding path program 48 times [2018-10-02 12:09:26,843 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:09:26,843 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:09:26,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:26,843 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:09:26,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:26,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:09:28,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:28,357 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:09:28,357 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 [2018-10-02 12:09:28,364 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:09:28,632 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-10-02 12:09:28,632 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:09:28,636 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:09:28,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:28,826 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:09:28,826 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-02 12:09:28,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-02 12:09:28,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-02 12:09:28,827 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:09:28,827 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 51 states. [2018-10-02 12:09:29,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:09:29,075 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-10-02 12:09:29,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-02 12:09:29,075 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 100 [2018-10-02 12:09:29,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:09:29,076 INFO L225 Difference]: With dead ends: 105 [2018-10-02 12:09:29,076 INFO L226 Difference]: Without dead ends: 103 [2018-10-02 12:09:29,077 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 1.1s impTime [2018-10-02 12:09:29,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-02 12:09:29,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-10-02 12:09:29,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-02 12:09:29,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-10-02 12:09:29,080 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2018-10-02 12:09:29,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:09:29,080 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-10-02 12:09:29,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-02 12:09:29,080 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-10-02 12:09:29,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-02 12:09:29,081 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:09:29,081 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1] [2018-10-02 12:09:29,081 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:09:29,081 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:09:29,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1934799775, now seen corresponding path program 49 times [2018-10-02 12:09:29,082 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:09:29,082 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:09:29,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:29,082 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:09:29,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:29,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:09:29,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:29,918 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:09:29,918 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 [2018-10-02 12:09:29,925 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:09:29,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:09:29,963 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:09:30,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:30,212 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:09:30,212 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-02 12:09:30,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-02 12:09:30,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-02 12:09:30,213 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:09:30,213 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 52 states. [2018-10-02 12:09:30,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:09:30,588 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-10-02 12:09:30,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-02 12:09:30,588 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2018-10-02 12:09:30,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:09:30,590 INFO L225 Difference]: With dead ends: 107 [2018-10-02 12:09:30,590 INFO L226 Difference]: Without dead ends: 105 [2018-10-02 12:09:30,590 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.6s impTime [2018-10-02 12:09:30,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-10-02 12:09:30,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-10-02 12:09:30,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-02 12:09:30,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-10-02 12:09:30,593 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2018-10-02 12:09:30,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:09:30,594 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-10-02 12:09:30,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-02 12:09:30,594 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-10-02 12:09:30,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-02 12:09:30,594 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:09:30,595 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1] [2018-10-02 12:09:30,595 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:09:30,595 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:09:30,595 INFO L82 PathProgramCache]: Analyzing trace with hash 378307483, now seen corresponding path program 50 times [2018-10-02 12:09:30,595 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:09:30,595 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:09:30,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:30,596 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:09:30,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:30,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:09:32,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:32,210 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:09:32,210 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 12:09:32,221 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:09:32,267 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:09:32,268 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:09:32,270 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:09:32,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:32,596 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:09:32,597 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-02 12:09:32,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-02 12:09:32,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-02 12:09:32,598 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:09:32,598 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 53 states. [2018-10-02 12:09:33,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:09:33,036 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-10-02 12:09:33,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-02 12:09:33,037 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 104 [2018-10-02 12:09:33,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:09:33,038 INFO L225 Difference]: With dead ends: 109 [2018-10-02 12:09:33,038 INFO L226 Difference]: Without dead ends: 107 [2018-10-02 12:09:33,038 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 1.3s impTime [2018-10-02 12:09:33,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-02 12:09:33,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-10-02 12:09:33,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-02 12:09:33,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-10-02 12:09:33,041 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2018-10-02 12:09:33,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:09:33,042 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-10-02 12:09:33,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-02 12:09:33,042 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-10-02 12:09:33,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-02 12:09:33,042 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:09:33,043 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1] [2018-10-02 12:09:33,043 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:09:33,043 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:09:33,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1518676907, now seen corresponding path program 51 times [2018-10-02 12:09:33,043 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:09:33,043 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:09:33,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:33,044 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:09:33,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:33,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:09:34,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:34,142 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:09:34,142 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 [2018-10-02 12:09:34,149 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:09:34,517 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-10-02 12:09:34,517 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:09:34,521 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:09:34,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:34,938 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:09:34,938 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-02 12:09:34,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-02 12:09:34,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-02 12:09:34,939 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:09:34,939 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 54 states. [2018-10-02 12:09:35,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:09:35,327 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-10-02 12:09:35,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-02 12:09:35,327 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2018-10-02 12:09:35,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:09:35,328 INFO L225 Difference]: With dead ends: 111 [2018-10-02 12:09:35,328 INFO L226 Difference]: Without dead ends: 109 [2018-10-02 12:09:35,328 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 0.9s impTime [2018-10-02 12:09:35,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-10-02 12:09:35,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-10-02 12:09:35,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-10-02 12:09:35,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-10-02 12:09:35,332 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2018-10-02 12:09:35,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:09:35,332 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-10-02 12:09:35,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-02 12:09:35,333 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-10-02 12:09:35,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-02 12:09:35,333 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:09:35,333 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1] [2018-10-02 12:09:35,333 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:09:35,334 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:09:35,334 INFO L82 PathProgramCache]: Analyzing trace with hash 840425103, now seen corresponding path program 52 times [2018-10-02 12:09:35,334 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:09:35,334 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:09:35,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:35,335 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:09:35,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:35,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:09:37,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:37,511 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:09:37,511 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 [2018-10-02 12:09:37,526 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:09:37,585 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:09:37,586 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:09:37,589 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:09:37,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:37,803 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:09:37,803 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-02 12:09:37,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-02 12:09:37,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-02 12:09:37,804 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:09:37,804 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 55 states. [2018-10-02 12:09:38,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:09:38,117 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-10-02 12:09:38,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-02 12:09:38,117 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 108 [2018-10-02 12:09:38,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:09:38,118 INFO L225 Difference]: With dead ends: 113 [2018-10-02 12:09:38,118 INFO L226 Difference]: Without dead ends: 111 [2018-10-02 12:09:38,118 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time 1.7s impTime [2018-10-02 12:09:38,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-02 12:09:38,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-10-02 12:09:38,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-10-02 12:09:38,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-10-02 12:09:38,121 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2018-10-02 12:09:38,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:09:38,121 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-10-02 12:09:38,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-02 12:09:38,121 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-10-02 12:09:38,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-02 12:09:38,121 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:09:38,122 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1] [2018-10-02 12:09:38,122 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:09:38,122 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:09:38,122 INFO L82 PathProgramCache]: Analyzing trace with hash 194724425, now seen corresponding path program 53 times [2018-10-02 12:09:38,122 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:09:38,122 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:09:38,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:38,123 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:09:38,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:38,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:09:39,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:39,726 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:09:39,726 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 [2018-10-02 12:09:39,744 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:09:41,061 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-10-02 12:09:41,062 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:09:41,066 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:09:41,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:41,319 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:09:41,319 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-02 12:09:41,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-02 12:09:41,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-02 12:09:41,320 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:09:41,320 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 56 states. [2018-10-02 12:09:41,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:09:41,526 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-10-02 12:09:41,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-02 12:09:41,527 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2018-10-02 12:09:41,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:09:41,528 INFO L225 Difference]: With dead ends: 115 [2018-10-02 12:09:41,528 INFO L226 Difference]: Without dead ends: 113 [2018-10-02 12:09:41,528 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 1.3s impTime [2018-10-02 12:09:41,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-02 12:09:41,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-10-02 12:09:41,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-10-02 12:09:41,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-10-02 12:09:41,531 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2018-10-02 12:09:41,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:09:41,532 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-10-02 12:09:41,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-02 12:09:41,532 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-10-02 12:09:41,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-02 12:09:41,533 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:09:41,533 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1] [2018-10-02 12:09:41,533 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:09:41,533 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:09:41,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1848336509, now seen corresponding path program 54 times [2018-10-02 12:09:41,534 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:09:41,534 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:09:41,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:41,534 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:09:41,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:41,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:09:43,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:43,194 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:09:43,194 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 [2018-10-02 12:09:43,202 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:09:43,580 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-10-02 12:09:43,581 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:09:43,584 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:09:43,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:43,936 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:09:43,936 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-10-02 12:09:43,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-02 12:09:43,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-02 12:09:43,937 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:09:43,937 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 57 states. [2018-10-02 12:09:44,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:09:44,950 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-10-02 12:09:44,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-02 12:09:44,951 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 112 [2018-10-02 12:09:44,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:09:44,952 INFO L225 Difference]: With dead ends: 117 [2018-10-02 12:09:44,952 INFO L226 Difference]: Without dead ends: 115 [2018-10-02 12:09:44,952 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time 1.3s impTime [2018-10-02 12:09:44,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-10-02 12:09:44,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-10-02 12:09:44,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-02 12:09:44,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-10-02 12:09:44,955 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2018-10-02 12:09:44,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:09:44,956 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-10-02 12:09:44,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-02 12:09:44,956 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-10-02 12:09:44,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-02 12:09:44,957 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:09:44,957 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1] [2018-10-02 12:09:44,957 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:09:44,957 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:09:44,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1865127485, now seen corresponding path program 55 times [2018-10-02 12:09:44,957 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:09:44,957 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:09:44,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:44,958 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:09:44,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:44,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:09:46,184 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:46,184 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:09:46,184 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 [2018-10-02 12:09:46,192 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:09:46,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:09:46,236 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:09:46,471 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:46,492 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:09:46,493 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-02 12:09:46,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-02 12:09:46,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-02 12:09:46,493 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:09:46,493 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 58 states. [2018-10-02 12:09:47,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:09:47,019 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-10-02 12:09:47,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-02 12:09:47,019 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2018-10-02 12:09:47,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:09:47,020 INFO L225 Difference]: With dead ends: 119 [2018-10-02 12:09:47,020 INFO L226 Difference]: Without dead ends: 117 [2018-10-02 12:09:47,020 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 1.0s impTime [2018-10-02 12:09:47,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-10-02 12:09:47,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-10-02 12:09:47,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-10-02 12:09:47,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2018-10-02 12:09:47,023 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 114 [2018-10-02 12:09:47,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:09:47,023 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2018-10-02 12:09:47,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-02 12:09:47,024 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2018-10-02 12:09:47,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-02 12:09:47,024 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:09:47,025 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 1, 1, 1] [2018-10-02 12:09:47,025 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:09:47,025 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:09:47,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1386202743, now seen corresponding path program 56 times [2018-10-02 12:09:47,025 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:09:47,025 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:09:47,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:47,026 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:09:47,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:47,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:09:48,350 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:48,350 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:09:48,350 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 [2018-10-02 12:09:48,358 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:09:48,400 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:09:48,400 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:09:48,402 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:09:49,444 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:49,464 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:09:49,464 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-10-02 12:09:49,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-02 12:09:49,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-02 12:09:49,465 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:09:49,465 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 59 states. [2018-10-02 12:09:49,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:09:49,822 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-10-02 12:09:49,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-02 12:09:49,822 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 116 [2018-10-02 12:09:49,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:09:49,823 INFO L225 Difference]: With dead ends: 121 [2018-10-02 12:09:49,824 INFO L226 Difference]: Without dead ends: 119 [2018-10-02 12:09:49,824 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time 1.0s impTime [2018-10-02 12:09:49,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-10-02 12:09:49,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-10-02 12:09:49,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-02 12:09:49,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-10-02 12:09:49,828 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 116 [2018-10-02 12:09:49,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:09:49,828 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-10-02 12:09:49,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-02 12:09:49,829 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-10-02 12:09:49,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-02 12:09:49,829 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:09:49,829 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 1, 1, 1] [2018-10-02 12:09:49,830 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:09:49,830 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:09:49,830 INFO L82 PathProgramCache]: Analyzing trace with hash 701026353, now seen corresponding path program 57 times [2018-10-02 12:09:49,830 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:09:49,830 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:09:49,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:49,831 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:09:49,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:49,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:09:51,577 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:51,578 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:09:51,578 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 12:09:51,586 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:09:52,121 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-10-02 12:09:52,122 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:09:52,128 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:09:54,067 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:54,088 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:09:54,089 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-10-02 12:09:54,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-02 12:09:54,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-02 12:09:54,089 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:09:54,089 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 60 states. [2018-10-02 12:09:54,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:09:54,317 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-10-02 12:09:54,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-02 12:09:54,318 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 118 [2018-10-02 12:09:54,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:09:54,319 INFO L225 Difference]: With dead ends: 123 [2018-10-02 12:09:54,319 INFO L226 Difference]: Without dead ends: 121 [2018-10-02 12:09:54,319 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s Time 1.4s impTime [2018-10-02 12:09:54,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-10-02 12:09:54,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-10-02 12:09:54,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-10-02 12:09:54,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2018-10-02 12:09:54,321 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 118 [2018-10-02 12:09:54,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:09:54,322 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2018-10-02 12:09:54,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-02 12:09:54,322 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2018-10-02 12:09:54,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-10-02 12:09:54,323 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:09:54,323 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 1, 1, 1] [2018-10-02 12:09:54,323 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:09:54,323 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:09:54,323 INFO L82 PathProgramCache]: Analyzing trace with hash -623488149, now seen corresponding path program 58 times [2018-10-02 12:09:54,323 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:09:54,323 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:09:54,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:54,324 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:09:54,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:54,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:09:55,777 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:55,777 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:09:55,777 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 [2018-10-02 12:09:55,784 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:09:55,827 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:09:55,828 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:09:55,831 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:09:56,156 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:56,176 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:09:56,176 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-10-02 12:09:56,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-02 12:09:56,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-02 12:09:56,177 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:09:56,177 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 61 states. [2018-10-02 12:09:56,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:09:56,527 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-10-02 12:09:56,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-02 12:09:56,527 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 120 [2018-10-02 12:09:56,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:09:56,528 INFO L225 Difference]: With dead ends: 125 [2018-10-02 12:09:56,528 INFO L226 Difference]: Without dead ends: 123 [2018-10-02 12:09:56,529 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 1.2s impTime [2018-10-02 12:09:56,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-10-02 12:09:56,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-10-02 12:09:56,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-10-02 12:09:56,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-10-02 12:09:56,532 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 120 [2018-10-02 12:09:56,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:09:56,532 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-10-02 12:09:56,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-02 12:09:56,532 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-10-02 12:09:56,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-10-02 12:09:56,533 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:09:56,533 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 1, 1, 1] [2018-10-02 12:09:56,533 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:09:56,533 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:09:56,533 INFO L82 PathProgramCache]: Analyzing trace with hash 2123362341, now seen corresponding path program 59 times [2018-10-02 12:09:56,534 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:09:56,534 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:09:56,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:56,534 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:09:56,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:56,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:09:58,008 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:58,009 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:09:58,009 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 12:09:58,017 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:09:59,935 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-10-02 12:09:59,935 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:09:59,939 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:10:00,304 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:10:00,326 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:10:00,326 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-10-02 12:10:00,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-02 12:10:00,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-02 12:10:00,327 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:10:00,327 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 62 states. [2018-10-02 12:10:00,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:10:00,707 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-10-02 12:10:00,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-02 12:10:00,707 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 122 [2018-10-02 12:10:00,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:10:00,707 INFO L225 Difference]: With dead ends: 127 [2018-10-02 12:10:00,708 INFO L226 Difference]: Without dead ends: 125 [2018-10-02 12:10:00,708 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 1.2s impTime [2018-10-02 12:10:00,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-10-02 12:10:00,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-10-02 12:10:00,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-10-02 12:10:00,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2018-10-02 12:10:00,711 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 122 [2018-10-02 12:10:00,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:10:00,711 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2018-10-02 12:10:00,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-02 12:10:00,711 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2018-10-02 12:10:00,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-10-02 12:10:00,712 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:10:00,712 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 1, 1, 1] [2018-10-02 12:10:00,712 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:10:00,712 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:10:00,712 INFO L82 PathProgramCache]: Analyzing trace with hash 441796191, now seen corresponding path program 60 times [2018-10-02 12:10:00,713 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:10:00,713 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:10:00,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:00,713 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:10:00,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:00,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:10:02,653 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:10:02,653 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:10:02,654 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 [2018-10-02 12:10:02,662 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:10:03,175 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-10-02 12:10:03,175 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:10:03,179 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:10:03,394 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:10:03,417 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:10:03,417 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-10-02 12:10:03,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-02 12:10:03,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-02 12:10:03,418 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:10:03,418 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 63 states. [2018-10-02 12:10:03,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:10:03,806 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-10-02 12:10:03,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-02 12:10:03,807 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 124 [2018-10-02 12:10:03,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:10:03,807 INFO L225 Difference]: With dead ends: 129 [2018-10-02 12:10:03,807 INFO L226 Difference]: Without dead ends: 127 [2018-10-02 12:10:03,808 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time 1.7s impTime [2018-10-02 12:10:03,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-10-02 12:10:03,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-10-02 12:10:03,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-10-02 12:10:03,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2018-10-02 12:10:03,810 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 124 [2018-10-02 12:10:03,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:10:03,810 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2018-10-02 12:10:03,810 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-02 12:10:03,810 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2018-10-02 12:10:03,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-10-02 12:10:03,810 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:10:03,811 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 1, 1, 1] [2018-10-02 12:10:03,811 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:10:03,811 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:10:03,811 INFO L82 PathProgramCache]: Analyzing trace with hash -635570663, now seen corresponding path program 61 times [2018-10-02 12:10:03,811 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:10:03,811 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:10:03,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:03,812 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:10:03,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:03,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:10:04,873 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:10:04,873 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:10:04,873 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 [2018-10-02 12:10:04,881 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:10:04,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:10:04,925 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:10:05,144 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:10:05,165 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:10:05,165 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-10-02 12:10:05,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-02 12:10:05,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-02 12:10:05,166 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:10:05,166 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 64 states. [2018-10-02 12:10:05,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:10:05,504 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-10-02 12:10:05,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-02 12:10:05,504 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 126 [2018-10-02 12:10:05,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:10:05,505 INFO L225 Difference]: With dead ends: 131 [2018-10-02 12:10:05,505 INFO L226 Difference]: Without dead ends: 129 [2018-10-02 12:10:05,505 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.9s impTime [2018-10-02 12:10:05,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-10-02 12:10:05,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-10-02 12:10:05,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-10-02 12:10:05,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2018-10-02 12:10:05,507 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 126 [2018-10-02 12:10:05,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:10:05,508 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2018-10-02 12:10:05,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-02 12:10:05,508 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2018-10-02 12:10:05,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-10-02 12:10:05,508 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:10:05,508 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 1, 1, 1] [2018-10-02 12:10:05,508 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:10:05,509 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:10:05,509 INFO L82 PathProgramCache]: Analyzing trace with hash -897999021, now seen corresponding path program 62 times [2018-10-02 12:10:05,509 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:10:05,509 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:10:05,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:05,509 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:10:05,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:05,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:10:06,801 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:10:06,801 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:10:06,801 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 12:10:06,809 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:10:06,855 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:10:06,855 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:10:06,858 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:10:07,091 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:10:07,110 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:10:07,111 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-10-02 12:10:07,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-02 12:10:07,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-02 12:10:07,112 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:10:07,112 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 65 states. [2018-10-02 12:10:07,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:10:07,420 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-10-02 12:10:07,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-02 12:10:07,420 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 128 [2018-10-02 12:10:07,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:10:07,421 INFO L225 Difference]: With dead ends: 133 [2018-10-02 12:10:07,421 INFO L226 Difference]: Without dead ends: 131 [2018-10-02 12:10:07,422 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 1.1s impTime [2018-10-02 12:10:07,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-02 12:10:07,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-10-02 12:10:07,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-10-02 12:10:07,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-10-02 12:10:07,424 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 128 [2018-10-02 12:10:07,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:10:07,424 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-10-02 12:10:07,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-02 12:10:07,424 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-10-02 12:10:07,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-10-02 12:10:07,425 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:10:07,425 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 1, 1, 1] [2018-10-02 12:10:07,425 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:10:07,426 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:10:07,426 INFO L82 PathProgramCache]: Analyzing trace with hash 311419405, now seen corresponding path program 63 times [2018-10-02 12:10:07,426 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:10:07,426 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:10:07,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:07,427 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:10:07,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:07,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:10:08,526 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:10:08,526 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:10:08,526 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 12:10:08,538 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:10:09,273 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-10-02 12:10:09,274 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:10:09,278 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:10:09,522 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:10:09,544 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:10:09,544 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-10-02 12:10:09,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-02 12:10:09,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-02 12:10:09,545 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:10:09,545 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 66 states. [2018-10-02 12:10:09,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:10:09,891 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-10-02 12:10:09,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-02 12:10:09,892 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 130 [2018-10-02 12:10:09,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:10:09,892 INFO L225 Difference]: With dead ends: 135 [2018-10-02 12:10:09,893 INFO L226 Difference]: Without dead ends: 133 [2018-10-02 12:10:09,893 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.9s impTime [2018-10-02 12:10:09,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-10-02 12:10:09,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-10-02 12:10:09,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-10-02 12:10:09,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2018-10-02 12:10:09,896 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 130 [2018-10-02 12:10:09,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:10:09,896 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2018-10-02 12:10:09,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-02 12:10:09,896 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2018-10-02 12:10:09,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-10-02 12:10:09,897 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:10:09,897 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 1, 1, 1] [2018-10-02 12:10:09,898 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:10:09,898 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:10:09,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1373610425, now seen corresponding path program 64 times [2018-10-02 12:10:09,898 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:10:09,898 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:10:09,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:09,899 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:10:09,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:09,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:10:12,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:10:12,068 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:10:12,068 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 [2018-10-02 12:10:12,076 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:10:12,141 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:10:12,142 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:10:12,145 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:10:12,572 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:10:12,592 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:10:12,592 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-10-02 12:10:12,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-02 12:10:12,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-02 12:10:12,593 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:10:12,593 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 67 states. [2018-10-02 12:10:13,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:10:13,029 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-10-02 12:10:13,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-02 12:10:13,029 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 132 [2018-10-02 12:10:13,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:10:13,030 INFO L225 Difference]: With dead ends: 137 [2018-10-02 12:10:13,030 INFO L226 Difference]: Without dead ends: 135 [2018-10-02 12:10:13,031 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s Time 2.0s impTime [2018-10-02 12:10:13,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-10-02 12:10:13,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-10-02 12:10:13,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-10-02 12:10:13,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2018-10-02 12:10:13,034 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 132 [2018-10-02 12:10:13,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:10:13,034 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2018-10-02 12:10:13,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-02 12:10:13,034 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2018-10-02 12:10:13,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-10-02 12:10:13,035 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:10:13,035 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 1, 1, 1] [2018-10-02 12:10:13,035 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:10:13,035 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:10:13,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1484606463, now seen corresponding path program 65 times [2018-10-02 12:10:13,036 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:10:13,036 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:10:13,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:13,036 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:10:13,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:13,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:10:14,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:10:14,579 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:10:14,579 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 [2018-10-02 12:10:14,586 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:10:17,325 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-10-02 12:10:17,325 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:10:17,330 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:10:17,611 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:10:17,635 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:10:17,636 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-10-02 12:10:17,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-02 12:10:17,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-02 12:10:17,636 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:10:17,636 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 68 states. [2018-10-02 12:10:18,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:10:18,064 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-10-02 12:10:18,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-02 12:10:18,064 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 134 [2018-10-02 12:10:18,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:10:18,065 INFO L225 Difference]: With dead ends: 139 [2018-10-02 12:10:18,065 INFO L226 Difference]: Without dead ends: 137 [2018-10-02 12:10:18,065 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 1.3s impTime [2018-10-02 12:10:18,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-10-02 12:10:18,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-10-02 12:10:18,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-10-02 12:10:18,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2018-10-02 12:10:18,068 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 134 [2018-10-02 12:10:18,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:10:18,068 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2018-10-02 12:10:18,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-02 12:10:18,068 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2018-10-02 12:10:18,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-10-02 12:10:18,068 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:10:18,069 INFO L375 BasicCegarLoop]: trace histogram [67, 66, 1, 1, 1] [2018-10-02 12:10:18,069 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:10:18,069 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:10:18,069 INFO L82 PathProgramCache]: Analyzing trace with hash -777616581, now seen corresponding path program 66 times [2018-10-02 12:10:18,069 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:10:18,069 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:10:18,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:18,070 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:10:18,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:18,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:10:19,272 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:10:19,272 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:10:19,272 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 12:10:19,279 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:10:19,989 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-10-02 12:10:19,989 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:10:19,993 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:10:20,228 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:10:20,249 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:10:20,250 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-10-02 12:10:20,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-02 12:10:20,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-02 12:10:20,251 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:10:20,251 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 69 states. [2018-10-02 12:10:20,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:10:20,614 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-10-02 12:10:20,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-02 12:10:20,614 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 136 [2018-10-02 12:10:20,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:10:20,615 INFO L225 Difference]: With dead ends: 141 [2018-10-02 12:10:20,615 INFO L226 Difference]: Without dead ends: 139 [2018-10-02 12:10:20,615 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 1.0s impTime [2018-10-02 12:10:20,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-10-02 12:10:20,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-10-02 12:10:20,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-10-02 12:10:20,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2018-10-02 12:10:20,617 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 136 [2018-10-02 12:10:20,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:10:20,618 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2018-10-02 12:10:20,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-02 12:10:20,618 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2018-10-02 12:10:20,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-10-02 12:10:20,618 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:10:20,618 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 1, 1, 1] [2018-10-02 12:10:20,619 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:10:20,619 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:10:20,619 INFO L82 PathProgramCache]: Analyzing trace with hash 34827253, now seen corresponding path program 67 times [2018-10-02 12:10:20,619 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:10:20,619 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:10:20,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:20,619 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:10:20,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:20,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:10:22,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:10:22,791 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:10:22,791 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 12:10:22,798 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:10:22,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:10:22,845 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:10:23,101 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:10:23,121 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:10:23,121 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-10-02 12:10:23,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-02 12:10:23,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-02 12:10:23,122 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:10:23,122 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 70 states. [2018-10-02 12:10:23,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:10:23,571 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-10-02 12:10:23,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-02 12:10:23,571 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 138 [2018-10-02 12:10:23,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:10:23,572 INFO L225 Difference]: With dead ends: 143 [2018-10-02 12:10:23,572 INFO L226 Difference]: Without dead ends: 141 [2018-10-02 12:10:23,572 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s Time 1.9s impTime [2018-10-02 12:10:23,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-10-02 12:10:23,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-10-02 12:10:23,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-10-02 12:10:23,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2018-10-02 12:10:23,576 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 138 [2018-10-02 12:10:23,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:10:23,576 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2018-10-02 12:10:23,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-02 12:10:23,576 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2018-10-02 12:10:23,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-10-02 12:10:23,577 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:10:23,577 INFO L375 BasicCegarLoop]: trace histogram [69, 68, 1, 1, 1] [2018-10-02 12:10:23,577 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:10:23,577 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:10:23,577 INFO L82 PathProgramCache]: Analyzing trace with hash -890696145, now seen corresponding path program 68 times [2018-10-02 12:10:23,577 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:10:23,578 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:10:23,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:23,578 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:10:23,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:23,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:10:25,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:10:25,418 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:10:25,418 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 12:10:25,425 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:10:25,475 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:10:25,475 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:10:25,477 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:10:25,714 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:10:25,734 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:10:25,734 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-10-02 12:10:25,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-02 12:10:25,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-02 12:10:25,735 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:10:25,735 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand 71 states. [2018-10-02 12:10:26,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:10:26,247 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-10-02 12:10:26,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-02 12:10:26,247 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 140 [2018-10-02 12:10:26,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:10:26,248 INFO L225 Difference]: With dead ends: 145 [2018-10-02 12:10:26,248 INFO L226 Difference]: Without dead ends: 143 [2018-10-02 12:10:26,248 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time 1.6s impTime [2018-10-02 12:10:26,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-10-02 12:10:26,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-10-02 12:10:26,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-10-02 12:10:26,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-10-02 12:10:26,252 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 140 [2018-10-02 12:10:26,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:10:26,252 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-10-02 12:10:26,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-02 12:10:26,253 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-10-02 12:10:26,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-10-02 12:10:26,253 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:10:26,253 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 1, 1, 1] [2018-10-02 12:10:26,254 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:10:26,254 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:10:26,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1260451351, now seen corresponding path program 69 times [2018-10-02 12:10:26,254 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:10:26,254 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:10:26,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:26,255 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:10:26,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:26,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:10:28,662 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:10:28,662 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:10:28,662 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 [2018-10-02 12:10:28,669 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:10:29,694 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-10-02 12:10:29,694 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:10:29,700 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:10:30,180 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:10:30,201 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:10:30,201 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-10-02 12:10:30,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-02 12:10:30,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-02 12:10:30,202 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:10:30,203 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 72 states. [2018-10-02 12:10:30,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:10:30,685 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-10-02 12:10:30,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-02 12:10:30,685 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 142 [2018-10-02 12:10:30,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:10:30,686 INFO L225 Difference]: With dead ends: 147 [2018-10-02 12:10:30,686 INFO L226 Difference]: Without dead ends: 145 [2018-10-02 12:10:30,686 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s Time 2.2s impTime [2018-10-02 12:10:30,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-10-02 12:10:30,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-10-02 12:10:30,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-10-02 12:10:30,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2018-10-02 12:10:30,690 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 142 [2018-10-02 12:10:30,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:10:30,690 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2018-10-02 12:10:30,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-02 12:10:30,690 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2018-10-02 12:10:30,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-10-02 12:10:30,691 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:10:30,691 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 1, 1, 1] [2018-10-02 12:10:30,691 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:10:30,691 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:10:30,691 INFO L82 PathProgramCache]: Analyzing trace with hash -112918749, now seen corresponding path program 70 times [2018-10-02 12:10:30,691 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:10:30,692 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:10:30,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:30,692 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:10:30,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:30,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:10:33,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:10:33,081 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:10:33,081 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 [2018-10-02 12:10:33,088 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:10:33,137 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:10:33,138 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:10:33,140 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:10:33,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:10:33,396 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:10:33,396 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-10-02 12:10:33,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-02 12:10:33,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-02 12:10:33,397 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:10:33,397 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand 73 states. [2018-10-02 12:10:33,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:10:33,941 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-10-02 12:10:33,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-02 12:10:33,941 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 144 [2018-10-02 12:10:33,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:10:33,942 INFO L225 Difference]: With dead ends: 149 [2018-10-02 12:10:33,942 INFO L226 Difference]: Without dead ends: 147 [2018-10-02 12:10:33,943 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s Time 2.2s impTime [2018-10-02 12:10:33,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-10-02 12:10:33,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-10-02 12:10:33,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-10-02 12:10:33,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2018-10-02 12:10:33,947 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 144 [2018-10-02 12:10:33,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:10:33,947 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2018-10-02 12:10:33,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-02 12:10:33,947 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2018-10-02 12:10:33,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-10-02 12:10:33,948 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:10:33,948 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 1, 1, 1] [2018-10-02 12:10:33,948 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:10:33,948 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:10:33,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1140683299, now seen corresponding path program 71 times [2018-10-02 12:10:33,949 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:10:33,949 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:10:33,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:33,949 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:10:33,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:33,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:10:35,834 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:10:35,835 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:10:35,835 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 [2018-10-02 12:10:35,842 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:10:39,743 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-10-02 12:10:39,743 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:10:39,748 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:10:40,026 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:10:40,050 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:10:40,050 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-10-02 12:10:40,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-02 12:10:40,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-02 12:10:40,051 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:10:40,051 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 74 states. [2018-10-02 12:10:40,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:10:40,540 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-10-02 12:10:40,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-02 12:10:40,540 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 146 [2018-10-02 12:10:40,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:10:40,541 INFO L225 Difference]: With dead ends: 151 [2018-10-02 12:10:40,541 INFO L226 Difference]: Without dead ends: 149 [2018-10-02 12:10:40,541 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time 1.7s impTime [2018-10-02 12:10:40,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-10-02 12:10:40,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-10-02 12:10:40,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-10-02 12:10:40,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2018-10-02 12:10:40,545 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 146 [2018-10-02 12:10:40,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:10:40,545 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2018-10-02 12:10:40,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-02 12:10:40,545 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2018-10-02 12:10:40,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-10-02 12:10:40,546 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:10:40,546 INFO L375 BasicCegarLoop]: trace histogram [73, 72, 1, 1, 1] [2018-10-02 12:10:40,546 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:10:40,546 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:10:40,546 INFO L82 PathProgramCache]: Analyzing trace with hash -979937769, now seen corresponding path program 72 times [2018-10-02 12:10:40,547 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:10:40,547 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:10:40,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:40,547 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:10:40,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:40,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:10:41,945 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:10:41,945 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:10:41,945 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 [2018-10-02 12:10:41,952 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:10:42,909 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-10-02 12:10:42,909 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:10:42,914 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:10:43,209 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:10:43,231 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:10:43,231 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-10-02 12:10:43,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-02 12:10:43,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-02 12:10:43,232 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:10:43,233 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 75 states. [2018-10-02 12:10:43,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:10:43,585 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-10-02 12:10:43,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-02 12:10:43,586 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 148 [2018-10-02 12:10:43,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:10:43,587 INFO L225 Difference]: With dead ends: 153 [2018-10-02 12:10:43,587 INFO L226 Difference]: Without dead ends: 151 [2018-10-02 12:10:43,587 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.2s impTime [2018-10-02 12:10:43,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-10-02 12:10:43,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-10-02 12:10:43,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-10-02 12:10:43,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2018-10-02 12:10:43,591 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 148 [2018-10-02 12:10:43,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:10:43,591 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2018-10-02 12:10:43,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-02 12:10:43,591 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2018-10-02 12:10:43,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-10-02 12:10:43,592 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:10:43,592 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 1, 1, 1] [2018-10-02 12:10:43,592 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:10:43,593 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:10:43,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1122306095, now seen corresponding path program 73 times [2018-10-02 12:10:43,593 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:10:43,593 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:10:43,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:43,593 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:10:43,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:43,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:10:46,016 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:10:46,016 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:10:46,017 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 [2018-10-02 12:10:46,024 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:10:46,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:10:46,077 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:10:46,384 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:10:46,405 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:10:46,405 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-10-02 12:10:46,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-02 12:10:46,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-02 12:10:46,406 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:10:46,407 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 76 states. [2018-10-02 12:10:46,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:10:46,982 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2018-10-02 12:10:46,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-02 12:10:46,983 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 150 [2018-10-02 12:10:46,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:10:46,984 INFO L225 Difference]: With dead ends: 155 [2018-10-02 12:10:46,984 INFO L226 Difference]: Without dead ends: 153 [2018-10-02 12:10:46,984 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s Time 2.2s impTime [2018-10-02 12:10:46,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-10-02 12:10:46,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-10-02 12:10:46,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-10-02 12:10:46,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2018-10-02 12:10:46,987 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 150 [2018-10-02 12:10:46,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:10:46,988 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2018-10-02 12:10:46,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-02 12:10:46,988 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2018-10-02 12:10:46,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-10-02 12:10:46,989 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:10:46,989 INFO L375 BasicCegarLoop]: trace histogram [75, 74, 1, 1, 1] [2018-10-02 12:10:46,989 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:10:46,989 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:10:46,989 INFO L82 PathProgramCache]: Analyzing trace with hash -499313909, now seen corresponding path program 74 times [2018-10-02 12:10:46,989 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:10:46,989 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:10:46,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:46,990 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:10:46,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:47,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:10:48,365 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:10:48,366 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:10:48,366 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 [2018-10-02 12:10:48,374 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:10:48,428 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:10:48,428 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:10:48,431 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:10:48,710 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:10:48,730 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:10:48,731 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-10-02 12:10:48,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-02 12:10:48,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-02 12:10:48,731 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:10:48,731 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 77 states. [2018-10-02 12:10:49,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:10:49,102 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-10-02 12:10:49,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-02 12:10:49,103 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 152 [2018-10-02 12:10:49,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:10:49,103 INFO L225 Difference]: With dead ends: 157 [2018-10-02 12:10:49,103 INFO L226 Difference]: Without dead ends: 155 [2018-10-02 12:10:49,104 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.1s impTime [2018-10-02 12:10:49,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-10-02 12:10:49,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-10-02 12:10:49,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-10-02 12:10:49,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2018-10-02 12:10:49,107 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 152 [2018-10-02 12:10:49,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:10:49,107 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2018-10-02 12:10:49,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-02 12:10:49,107 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2018-10-02 12:10:49,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-10-02 12:10:49,108 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:10:49,108 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 1, 1, 1] [2018-10-02 12:10:49,108 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:10:49,108 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:10:49,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1195722693, now seen corresponding path program 75 times [2018-10-02 12:10:49,108 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:10:49,108 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:10:49,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:49,109 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:10:49,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:49,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:10:51,215 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:10:51,216 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:10:51,216 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 [2018-10-02 12:10:51,223 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:10:52,628 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-10-02 12:10:52,628 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:10:52,633 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:10:52,883 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:10:52,905 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:10:52,906 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-10-02 12:10:52,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-02 12:10:52,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-02 12:10:52,906 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:10:52,907 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 78 states. [2018-10-02 12:10:53,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:10:53,260 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2018-10-02 12:10:53,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-02 12:10:53,260 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 154 [2018-10-02 12:10:53,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:10:53,261 INFO L225 Difference]: With dead ends: 159 [2018-10-02 12:10:53,261 INFO L226 Difference]: Without dead ends: 157 [2018-10-02 12:10:53,261 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time 1.9s impTime [2018-10-02 12:10:53,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-10-02 12:10:53,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-10-02 12:10:53,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-10-02 12:10:53,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2018-10-02 12:10:53,264 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 154 [2018-10-02 12:10:53,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:10:53,264 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2018-10-02 12:10:53,264 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-02 12:10:53,264 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2018-10-02 12:10:53,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-10-02 12:10:53,265 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:10:53,265 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 1, 1, 1] [2018-10-02 12:10:53,265 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:10:53,265 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:10:53,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1961675265, now seen corresponding path program 76 times [2018-10-02 12:10:53,265 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:10:53,265 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:10:53,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:53,266 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:10:53,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:53,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:10:55,482 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:10:55,483 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:10:55,483 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 12:10:55,491 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:10:55,547 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:10:55,547 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:10:55,550 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:10:55,805 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:10:55,826 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:10:55,826 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-10-02 12:10:55,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-10-02 12:10:55,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-10-02 12:10:55,827 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:10:55,827 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand 79 states. [2018-10-02 12:10:56,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:10:56,471 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2018-10-02 12:10:56,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-02 12:10:56,471 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 156 [2018-10-02 12:10:56,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:10:56,472 INFO L225 Difference]: With dead ends: 161 [2018-10-02 12:10:56,472 INFO L226 Difference]: Without dead ends: 159 [2018-10-02 12:10:56,472 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s Time 2.0s impTime [2018-10-02 12:10:56,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-10-02 12:10:56,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-10-02 12:10:56,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-10-02 12:10:56,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2018-10-02 12:10:56,476 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 156 [2018-10-02 12:10:56,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:10:56,477 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2018-10-02 12:10:56,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-10-02 12:10:56,477 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2018-10-02 12:10:56,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-10-02 12:10:56,478 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:10:56,478 INFO L375 BasicCegarLoop]: trace histogram [78, 77, 1, 1, 1] [2018-10-02 12:10:56,478 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:10:56,478 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:10:56,478 INFO L82 PathProgramCache]: Analyzing trace with hash 320765369, now seen corresponding path program 77 times [2018-10-02 12:10:56,479 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:10:56,479 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:10:56,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:56,479 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:10:56,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:56,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:10:59,135 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:10:59,135 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:10:59,135 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 12:10:59,142 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:11:04,515 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-10-02 12:11:04,515 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:11:04,521 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:11:04,784 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:11:04,808 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:11:04,808 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-10-02 12:11:04,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-02 12:11:04,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-02 12:11:04,809 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:11:04,809 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand 80 states. [2018-10-02 12:11:05,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:11:05,452 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-10-02 12:11:05,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-02 12:11:05,452 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 158 [2018-10-02 12:11:05,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:11:05,453 INFO L225 Difference]: With dead ends: 163 [2018-10-02 12:11:05,453 INFO L226 Difference]: Without dead ends: 161 [2018-10-02 12:11:05,453 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s Time 2.3s impTime [2018-10-02 12:11:05,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-10-02 12:11:05,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-10-02 12:11:05,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-10-02 12:11:05,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2018-10-02 12:11:05,461 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 158 [2018-10-02 12:11:05,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:11:05,461 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2018-10-02 12:11:05,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-02 12:11:05,461 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2018-10-02 12:11:05,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-10-02 12:11:05,462 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:11:05,462 INFO L375 BasicCegarLoop]: trace histogram [79, 78, 1, 1, 1] [2018-10-02 12:11:05,462 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:11:05,462 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:11:05,463 INFO L82 PathProgramCache]: Analyzing trace with hash -982073613, now seen corresponding path program 78 times [2018-10-02 12:11:05,463 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:11:05,463 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:11:05,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:11:05,463 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:11:05,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:11:05,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:11:07,559 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:11:07,559 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:11:07,559 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 [2018-10-02 12:11:07,566 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:11:08,937 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-10-02 12:11:08,937 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:11:08,942 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:11:09,223 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:11:09,246 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:11:09,247 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-10-02 12:11:09,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-10-02 12:11:09,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-10-02 12:11:09,248 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:11:09,248 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand 81 states. [2018-10-02 12:11:09,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:11:09,609 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2018-10-02 12:11:09,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-02 12:11:09,609 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 160 [2018-10-02 12:11:09,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:11:09,610 INFO L225 Difference]: With dead ends: 165 [2018-10-02 12:11:09,610 INFO L226 Difference]: Without dead ends: 163 [2018-10-02 12:11:09,610 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time 1.8s impTime [2018-10-02 12:11:09,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-10-02 12:11:09,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-10-02 12:11:09,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-10-02 12:11:09,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2018-10-02 12:11:09,614 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 160 [2018-10-02 12:11:09,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:11:09,614 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2018-10-02 12:11:09,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-10-02 12:11:09,614 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2018-10-02 12:11:09,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-10-02 12:11:09,615 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:11:09,615 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 1, 1, 1] [2018-10-02 12:11:09,615 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:11:09,615 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:11:09,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1120115117, now seen corresponding path program 79 times [2018-10-02 12:11:09,616 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:11:09,616 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:11:09,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:11:09,616 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:11:09,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:11:09,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:11:11,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:11:11,376 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:11:11,376 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 [2018-10-02 12:11:11,383 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:11:11,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:11:11,441 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:11:11,774 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:11:11,794 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:11:11,794 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-10-02 12:11:11,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-02 12:11:11,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-02 12:11:11,795 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:11:11,795 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 82 states. [2018-10-02 12:11:12,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:11:12,277 INFO L93 Difference]: Finished difference Result 167 states and 167 transitions. [2018-10-02 12:11:12,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-02 12:11:12,278 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 162 [2018-10-02 12:11:12,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:11:12,278 INFO L225 Difference]: With dead ends: 167 [2018-10-02 12:11:12,278 INFO L226 Difference]: Without dead ends: 165 [2018-10-02 12:11:12,279 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time 1.5s impTime [2018-10-02 12:11:12,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-10-02 12:11:12,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-10-02 12:11:12,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-10-02 12:11:12,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2018-10-02 12:11:12,282 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 162 [2018-10-02 12:11:12,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:11:12,282 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2018-10-02 12:11:12,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-02 12:11:12,282 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2018-10-02 12:11:12,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-10-02 12:11:12,283 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:11:12,283 INFO L375 BasicCegarLoop]: trace histogram [81, 80, 1, 1, 1] [2018-10-02 12:11:12,284 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:11:12,284 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:11:12,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1606111769, now seen corresponding path program 80 times [2018-10-02 12:11:12,284 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:11:12,284 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:11:12,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:11:12,285 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:11:12,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:11:12,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:11:15,090 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:11:15,090 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:11:15,090 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 [2018-10-02 12:11:15,097 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:11:15,151 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:11:15,152 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:11:15,155 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:11:15,438 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:11:15,459 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:11:15,459 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-10-02 12:11:15,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-02 12:11:15,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-02 12:11:15,460 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:11:15,460 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand 83 states. [2018-10-02 12:11:16,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:11:16,043 INFO L93 Difference]: Finished difference Result 169 states and 169 transitions. [2018-10-02 12:11:16,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-02 12:11:16,043 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 164 [2018-10-02 12:11:16,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:11:16,044 INFO L225 Difference]: With dead ends: 169 [2018-10-02 12:11:16,044 INFO L226 Difference]: Without dead ends: 167 [2018-10-02 12:11:16,044 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s Time 2.5s impTime [2018-10-02 12:11:16,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-10-02 12:11:16,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-10-02 12:11:16,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-10-02 12:11:16,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2018-10-02 12:11:16,047 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 164 [2018-10-02 12:11:16,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:11:16,047 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2018-10-02 12:11:16,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-02 12:11:16,047 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2018-10-02 12:11:16,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-10-02 12:11:16,047 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:11:16,048 INFO L375 BasicCegarLoop]: trace histogram [82, 81, 1, 1, 1] [2018-10-02 12:11:16,048 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:11:16,048 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:11:16,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1580098655, now seen corresponding path program 81 times [2018-10-02 12:11:16,048 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:11:16,048 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:11:16,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:11:16,049 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:11:16,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:11:16,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:11:18,279 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:11:18,279 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:11:18,279 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 12:11:18,286 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:11:20,312 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s) [2018-10-02 12:11:20,312 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:11:20,318 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:11:20,615 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:11:20,640 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:11:20,640 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-10-02 12:11:20,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-02 12:11:20,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-02 12:11:20,641 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:11:20,641 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 84 states. [2018-10-02 12:11:21,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:11:21,224 INFO L93 Difference]: Finished difference Result 171 states and 171 transitions. [2018-10-02 12:11:21,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-10-02 12:11:21,225 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 166 [2018-10-02 12:11:21,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:11:21,225 INFO L225 Difference]: With dead ends: 171 [2018-10-02 12:11:21,225 INFO L226 Difference]: Without dead ends: 169 [2018-10-02 12:11:21,226 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s Time 2.0s impTime [2018-10-02 12:11:21,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-10-02 12:11:21,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-10-02 12:11:21,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-10-02 12:11:21,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2018-10-02 12:11:21,229 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 166 [2018-10-02 12:11:21,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:11:21,229 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2018-10-02 12:11:21,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-02 12:11:21,230 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2018-10-02 12:11:21,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-10-02 12:11:21,230 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:11:21,230 INFO L375 BasicCegarLoop]: trace histogram [83, 82, 1, 1, 1] [2018-10-02 12:11:21,231 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:11:21,231 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:11:21,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1943667419, now seen corresponding path program 82 times [2018-10-02 12:11:21,231 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:11:21,231 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:11:21,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:11:21,232 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:11:21,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:11:21,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:11:23,741 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:11:23,742 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:11:23,742 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 [2018-10-02 12:11:23,750 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:11:23,812 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:11:23,812 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:11:23,815 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:11:24,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:11:24,196 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:11:24,196 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-10-02 12:11:24,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-10-02 12:11:24,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-10-02 12:11:24,197 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:11:24,197 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand 85 states. [2018-10-02 12:11:24,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:11:24,653 INFO L93 Difference]: Finished difference Result 173 states and 173 transitions. [2018-10-02 12:11:24,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-10-02 12:11:24,654 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 168 [2018-10-02 12:11:24,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:11:24,654 INFO L225 Difference]: With dead ends: 173 [2018-10-02 12:11:24,654 INFO L226 Difference]: Without dead ends: 171 [2018-10-02 12:11:24,655 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s Time 2.1s impTime [2018-10-02 12:11:24,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-10-02 12:11:24,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-10-02 12:11:24,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-10-02 12:11:24,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2018-10-02 12:11:24,657 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 168 [2018-10-02 12:11:24,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:11:24,657 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2018-10-02 12:11:24,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-10-02 12:11:24,658 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2018-10-02 12:11:24,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-10-02 12:11:24,658 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:11:24,658 INFO L375 BasicCegarLoop]: trace histogram [84, 83, 1, 1, 1] [2018-10-02 12:11:24,659 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:11:24,659 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:11:24,659 INFO L82 PathProgramCache]: Analyzing trace with hash -446332011, now seen corresponding path program 83 times [2018-10-02 12:11:24,659 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:11:24,659 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:11:24,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:11:24,659 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:11:24,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:11:24,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:11:26,972 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:11:26,972 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:11:26,972 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 [2018-10-02 12:11:26,980 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:11:34,893 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 84 check-sat command(s) [2018-10-02 12:11:34,894 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:11:34,900 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:11:35,187 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:11:35,210 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:11:35,211 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-10-02 12:11:35,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-02 12:11:35,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-02 12:11:35,212 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:11:35,212 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand 86 states. [2018-10-02 12:11:35,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:11:35,668 INFO L93 Difference]: Finished difference Result 175 states and 175 transitions. [2018-10-02 12:11:35,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-02 12:11:35,668 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 170 [2018-10-02 12:11:35,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:11:35,670 INFO L225 Difference]: With dead ends: 175 [2018-10-02 12:11:35,670 INFO L226 Difference]: Without dead ends: 173 [2018-10-02 12:11:35,670 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s Time 2.0s impTime [2018-10-02 12:11:35,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-10-02 12:11:35,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-10-02 12:11:35,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-10-02 12:11:35,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2018-10-02 12:11:35,674 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 170 [2018-10-02 12:11:35,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:11:35,674 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2018-10-02 12:11:35,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-02 12:11:35,674 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2018-10-02 12:11:35,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-10-02 12:11:35,675 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:11:35,675 INFO L375 BasicCegarLoop]: trace histogram [85, 84, 1, 1, 1] [2018-10-02 12:11:35,675 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:11:35,675 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:11:35,675 INFO L82 PathProgramCache]: Analyzing trace with hash 571719119, now seen corresponding path program 84 times [2018-10-02 12:11:35,675 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:11:35,676 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:11:35,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:11:35,676 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:11:35,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:11:35,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:11:36,954 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:11:36,955 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:11:36,955 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 [2018-10-02 12:11:36,964 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:11:38,632 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2018-10-02 12:11:38,632 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:11:38,638 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:11:38,934 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:11:38,957 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:11:38,957 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-10-02 12:11:38,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-10-02 12:11:38,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-10-02 12:11:38,958 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:11:38,958 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand 87 states. [2018-10-02 12:11:39,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:11:39,586 INFO L93 Difference]: Finished difference Result 177 states and 177 transitions. [2018-10-02 12:11:39,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-10-02 12:11:39,586 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 172 [2018-10-02 12:11:39,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:11:39,587 INFO L225 Difference]: With dead ends: 177 [2018-10-02 12:11:39,587 INFO L226 Difference]: Without dead ends: 175 [2018-10-02 12:11:39,587 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 1.0s impTime [2018-10-02 12:11:39,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-10-02 12:11:39,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-10-02 12:11:39,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-10-02 12:11:39,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2018-10-02 12:11:39,592 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 172 [2018-10-02 12:11:39,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:11:39,593 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2018-10-02 12:11:39,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-10-02 12:11:39,594 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2018-10-02 12:11:39,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-10-02 12:11:39,594 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:11:39,595 INFO L375 BasicCegarLoop]: trace histogram [86, 85, 1, 1, 1] [2018-10-02 12:11:39,595 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:11:39,595 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:11:39,595 INFO L82 PathProgramCache]: Analyzing trace with hash -333688439, now seen corresponding path program 85 times [2018-10-02 12:11:39,595 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:11:39,595 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:11:39,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:11:39,596 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:11:39,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:11:39,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:11:40,681 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:11:40,681 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:11:40,681 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 12:11:40,689 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:11:40,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:11:40,754 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:11:41,056 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:11:41,076 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:11:41,076 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-10-02 12:11:41,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-02 12:11:41,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-02 12:11:41,077 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:11:41,078 INFO L87 Difference]: Start difference. First operand 175 states and 175 transitions. Second operand 88 states. [2018-10-02 12:11:41,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:11:41,484 INFO L93 Difference]: Finished difference Result 179 states and 179 transitions. [2018-10-02 12:11:41,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-02 12:11:41,485 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 174 [2018-10-02 12:11:41,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:11:41,485 INFO L225 Difference]: With dead ends: 179 [2018-10-02 12:11:41,486 INFO L226 Difference]: Without dead ends: 177 [2018-10-02 12:11:41,486 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.8s impTime [2018-10-02 12:11:41,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-10-02 12:11:41,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2018-10-02 12:11:41,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-10-02 12:11:41,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 177 transitions. [2018-10-02 12:11:41,489 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 177 transitions. Word has length 174 [2018-10-02 12:11:41,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:11:41,490 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 177 transitions. [2018-10-02 12:11:41,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-02 12:11:41,490 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 177 transitions. [2018-10-02 12:11:41,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-10-02 12:11:41,491 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:11:41,491 INFO L375 BasicCegarLoop]: trace histogram [87, 86, 1, 1, 1] [2018-10-02 12:11:41,491 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:11:41,491 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:11:41,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1448009411, now seen corresponding path program 86 times [2018-10-02 12:11:41,492 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:11:41,492 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:11:41,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:11:41,492 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:11:41,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:11:41,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:11:42,966 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:11:42,966 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:11:42,966 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 [2018-10-02 12:11:42,973 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:11:43,037 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:11:43,038 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:11:43,041 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:11:43,447 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:11:43,467 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:11:43,467 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-10-02 12:11:43,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-10-02 12:11:43,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-10-02 12:11:43,468 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:11:43,468 INFO L87 Difference]: Start difference. First operand 177 states and 177 transitions. Second operand 89 states. [2018-10-02 12:11:44,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:11:44,084 INFO L93 Difference]: Finished difference Result 181 states and 181 transitions. [2018-10-02 12:11:44,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-10-02 12:11:44,084 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 176 [2018-10-02 12:11:44,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:11:44,085 INFO L225 Difference]: With dead ends: 181 [2018-10-02 12:11:44,085 INFO L226 Difference]: Without dead ends: 179 [2018-10-02 12:11:44,085 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 1.2s impTime [2018-10-02 12:11:44,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-10-02 12:11:44,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2018-10-02 12:11:44,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-10-02 12:11:44,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2018-10-02 12:11:44,088 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 176 [2018-10-02 12:11:44,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:11:44,088 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2018-10-02 12:11:44,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-10-02 12:11:44,088 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2018-10-02 12:11:44,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-10-02 12:11:44,089 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:11:44,089 INFO L375 BasicCegarLoop]: trace histogram [88, 87, 1, 1, 1] [2018-10-02 12:11:44,089 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:11:44,089 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:11:44,090 INFO L82 PathProgramCache]: Analyzing trace with hash -32307843, now seen corresponding path program 87 times [2018-10-02 12:11:44,090 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:11:44,090 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:11:44,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:11:44,090 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:11:44,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:11:44,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:11:45,773 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:11:45,774 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:11:45,774 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 [2018-10-02 12:11:45,781 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:11:48,287 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 88 check-sat command(s) [2018-10-02 12:11:48,287 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:11:48,293 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:11:48,803 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:11:48,825 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:11:48,825 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-10-02 12:11:48,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-02 12:11:48,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-02 12:11:48,826 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:11:48,826 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand 90 states. [2018-10-02 12:11:49,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:11:49,292 INFO L93 Difference]: Finished difference Result 183 states and 183 transitions. [2018-10-02 12:11:49,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-02 12:11:49,292 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 178 [2018-10-02 12:11:49,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:11:49,293 INFO L225 Difference]: With dead ends: 183 [2018-10-02 12:11:49,293 INFO L226 Difference]: Without dead ends: 181 [2018-10-02 12:11:49,293 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time 1.4s impTime [2018-10-02 12:11:49,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-10-02 12:11:49,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-10-02 12:11:49,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-10-02 12:11:49,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 181 transitions. [2018-10-02 12:11:49,297 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 181 transitions. Word has length 178 [2018-10-02 12:11:49,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:11:49,297 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 181 transitions. [2018-10-02 12:11:49,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-02 12:11:49,297 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 181 transitions. [2018-10-02 12:11:49,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-10-02 12:11:49,298 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:11:49,298 INFO L375 BasicCegarLoop]: trace histogram [89, 88, 1, 1, 1] [2018-10-02 12:11:49,298 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:11:49,298 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:11:49,298 INFO L82 PathProgramCache]: Analyzing trace with hash -983013961, now seen corresponding path program 88 times [2018-10-02 12:11:49,298 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:11:49,299 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:11:49,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:11:49,299 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:11:49,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:11:49,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:11:50,802 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:11:50,803 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:11:50,803 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 12:11:50,810 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:11:50,873 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:11:50,874 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:11:50,877 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:11:51,198 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:11:51,218 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:11:51,219 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-10-02 12:11:51,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-10-02 12:11:51,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-10-02 12:11:51,220 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:11:51,220 INFO L87 Difference]: Start difference. First operand 181 states and 181 transitions. Second operand 91 states. [2018-10-02 12:11:51,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:11:51,783 INFO L93 Difference]: Finished difference Result 185 states and 185 transitions. [2018-10-02 12:11:51,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-10-02 12:11:51,783 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 180 [2018-10-02 12:11:51,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:11:51,784 INFO L225 Difference]: With dead ends: 185 [2018-10-02 12:11:51,784 INFO L226 Difference]: Without dead ends: 183 [2018-10-02 12:11:51,784 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 1.2s impTime [2018-10-02 12:11:51,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-10-02 12:11:51,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2018-10-02 12:11:51,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-10-02 12:11:51,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2018-10-02 12:11:51,787 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 180 [2018-10-02 12:11:51,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:11:51,787 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2018-10-02 12:11:51,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-10-02 12:11:51,787 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2018-10-02 12:11:51,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-10-02 12:11:51,788 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:11:51,788 INFO L375 BasicCegarLoop]: trace histogram [90, 89, 1, 1, 1] [2018-10-02 12:11:51,788 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:11:51,788 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:11:51,788 INFO L82 PathProgramCache]: Analyzing trace with hash 216440689, now seen corresponding path program 89 times [2018-10-02 12:11:51,789 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:11:51,789 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:11:51,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:11:51,789 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:11:51,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:11:51,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:11:52,902 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:11:52,902 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:11:52,902 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 12:11:52,909 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:12:02,743 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 90 check-sat command(s) [2018-10-02 12:12:02,744 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:12:02,751 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:12:03,066 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:12:03,090 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:12:03,090 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-10-02 12:12:03,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-02 12:12:03,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-02 12:12:03,091 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:12:03,091 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand 92 states. [2018-10-02 12:12:03,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:12:03,502 INFO L93 Difference]: Finished difference Result 187 states and 187 transitions. [2018-10-02 12:12:03,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-10-02 12:12:03,502 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 182 [2018-10-02 12:12:03,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:12:03,503 INFO L225 Difference]: With dead ends: 187 [2018-10-02 12:12:03,503 INFO L226 Difference]: Without dead ends: 185 [2018-10-02 12:12:03,503 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.8s impTime [2018-10-02 12:12:03,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-10-02 12:12:03,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2018-10-02 12:12:03,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-10-02 12:12:03,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 185 transitions. [2018-10-02 12:12:03,506 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 185 transitions. Word has length 182 [2018-10-02 12:12:03,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:12:03,506 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 185 transitions. [2018-10-02 12:12:03,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-10-02 12:12:03,506 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 185 transitions. [2018-10-02 12:12:03,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-10-02 12:12:03,507 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:12:03,507 INFO L375 BasicCegarLoop]: trace histogram [91, 90, 1, 1, 1] [2018-10-02 12:12:03,507 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:12:03,507 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:12:03,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1841124011, now seen corresponding path program 90 times [2018-10-02 12:12:03,507 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:12:03,508 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:12:03,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:12:03,508 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:12:03,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:12:03,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:12:05,125 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:12:05,126 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:12:05,126 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 12:12:05,134 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:12:07,255 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2018-10-02 12:12:07,255 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:12:07,261 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:12:07,616 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:12:07,639 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:12:07,639 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-10-02 12:12:07,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-10-02 12:12:07,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-10-02 12:12:07,640 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:12:07,640 INFO L87 Difference]: Start difference. First operand 185 states and 185 transitions. Second operand 93 states. [2018-10-02 12:12:08,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:12:08,080 INFO L93 Difference]: Finished difference Result 189 states and 189 transitions. [2018-10-02 12:12:08,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-10-02 12:12:08,081 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 184 [2018-10-02 12:12:08,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:12:08,081 INFO L225 Difference]: With dead ends: 189 [2018-10-02 12:12:08,081 INFO L226 Difference]: Without dead ends: 187 [2018-10-02 12:12:08,082 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 1.3s impTime [2018-10-02 12:12:08,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-10-02 12:12:08,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-10-02 12:12:08,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-10-02 12:12:08,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2018-10-02 12:12:08,085 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 184 [2018-10-02 12:12:08,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:12:08,086 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2018-10-02 12:12:08,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-10-02 12:12:08,086 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2018-10-02 12:12:08,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-10-02 12:12:08,087 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:12:08,087 INFO L375 BasicCegarLoop]: trace histogram [92, 91, 1, 1, 1] [2018-10-02 12:12:08,087 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:12:08,087 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:12:08,087 INFO L82 PathProgramCache]: Analyzing trace with hash -206299291, now seen corresponding path program 91 times [2018-10-02 12:12:08,087 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:12:08,088 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:12:08,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:12:08,088 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:12:08,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:12:08,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:12:09,723 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:12:09,724 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:12:09,724 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 [2018-10-02 12:12:09,732 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:12:09,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:12:09,804 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:12:10,137 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:12:10,158 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:12:10,158 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-10-02 12:12:10,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-10-02 12:12:10,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-10-02 12:12:10,159 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:12:10,159 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand 94 states. [2018-10-02 12:12:10,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:12:10,614 INFO L93 Difference]: Finished difference Result 191 states and 191 transitions. [2018-10-02 12:12:10,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-10-02 12:12:10,615 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 186 [2018-10-02 12:12:10,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:12:10,616 INFO L225 Difference]: With dead ends: 191 [2018-10-02 12:12:10,616 INFO L226 Difference]: Without dead ends: 189 [2018-10-02 12:12:10,616 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 1.3s impTime [2018-10-02 12:12:10,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-10-02 12:12:10,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2018-10-02 12:12:10,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-10-02 12:12:10,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 189 transitions. [2018-10-02 12:12:10,621 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 189 transitions. Word has length 186 [2018-10-02 12:12:10,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:12:10,621 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 189 transitions. [2018-10-02 12:12:10,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-10-02 12:12:10,621 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 189 transitions. [2018-10-02 12:12:10,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-10-02 12:12:10,622 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:12:10,622 INFO L375 BasicCegarLoop]: trace histogram [93, 92, 1, 1, 1] [2018-10-02 12:12:10,622 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:12:10,622 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:12:10,623 INFO L82 PathProgramCache]: Analyzing trace with hash -685070945, now seen corresponding path program 92 times [2018-10-02 12:12:10,623 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:12:10,623 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:12:10,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:12:10,623 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:12:10,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:12:10,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:12:11,904 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:12:11,904 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:12:11,904 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 [2018-10-02 12:12:11,911 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:12:11,978 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:12:11,978 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:12:11,981 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:12:12,354 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:12:12,375 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:12:12,375 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-10-02 12:12:12,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-10-02 12:12:12,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-10-02 12:12:12,376 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:12:12,376 INFO L87 Difference]: Start difference. First operand 189 states and 189 transitions. Second operand 95 states. [2018-10-02 12:12:12,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:12:12,815 INFO L93 Difference]: Finished difference Result 193 states and 193 transitions. [2018-10-02 12:12:12,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-10-02 12:12:12,816 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 188 [2018-10-02 12:12:12,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:12:12,817 INFO L225 Difference]: With dead ends: 193 [2018-10-02 12:12:12,817 INFO L226 Difference]: Without dead ends: 191 [2018-10-02 12:12:12,817 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 1.0s impTime [2018-10-02 12:12:12,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-10-02 12:12:12,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-10-02 12:12:12,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-10-02 12:12:12,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 191 transitions. [2018-10-02 12:12:12,820 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 191 transitions. Word has length 188 [2018-10-02 12:12:12,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:12:12,820 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 191 transitions. [2018-10-02 12:12:12,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-10-02 12:12:12,820 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 191 transitions. [2018-10-02 12:12:12,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-10-02 12:12:12,821 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:12:12,821 INFO L375 BasicCegarLoop]: trace histogram [94, 93, 1, 1, 1] [2018-10-02 12:12:12,822 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:12:12,822 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:12:12,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1223129767, now seen corresponding path program 93 times [2018-10-02 12:12:12,822 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:12:12,822 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:12:12,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:12:12,823 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:12:12,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:12:12,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:12:14,603 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:12:14,603 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:12:14,603 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 [2018-10-02 12:12:14,610 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:12:17,874 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 94 check-sat command(s) [2018-10-02 12:12:17,874 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:12:17,880 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:12:18,207 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:12:18,230 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:12:18,230 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-10-02 12:12:18,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-02 12:12:18,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-02 12:12:18,231 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:12:18,231 INFO L87 Difference]: Start difference. First operand 191 states and 191 transitions. Second operand 96 states. [2018-10-02 12:12:18,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:12:18,852 INFO L93 Difference]: Finished difference Result 195 states and 195 transitions. [2018-10-02 12:12:18,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-02 12:12:18,853 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 190 [2018-10-02 12:12:18,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:12:18,854 INFO L225 Difference]: With dead ends: 195 [2018-10-02 12:12:18,854 INFO L226 Difference]: Without dead ends: 193 [2018-10-02 12:12:18,854 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time 1.5s impTime [2018-10-02 12:12:18,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-10-02 12:12:18,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2018-10-02 12:12:18,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-10-02 12:12:18,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 193 transitions. [2018-10-02 12:12:18,857 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 193 transitions. Word has length 190 [2018-10-02 12:12:18,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:12:18,857 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 193 transitions. [2018-10-02 12:12:18,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-02 12:12:18,857 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 193 transitions. [2018-10-02 12:12:18,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-10-02 12:12:18,858 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:12:18,858 INFO L375 BasicCegarLoop]: trace histogram [95, 94, 1, 1, 1] [2018-10-02 12:12:18,858 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:12:18,858 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:12:18,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1393385107, now seen corresponding path program 94 times [2018-10-02 12:12:18,858 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:12:18,858 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:12:18,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:12:18,859 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:12:18,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:12:18,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:12:21,162 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:12:21,163 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:12:21,163 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 [2018-10-02 12:12:21,171 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:12:21,238 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:12:21,239 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:12:21,242 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:12:21,561 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:12:21,581 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:12:21,581 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-10-02 12:12:21,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-10-02 12:12:21,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-10-02 12:12:21,582 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:12:21,582 INFO L87 Difference]: Start difference. First operand 193 states and 193 transitions. Second operand 97 states. [2018-10-02 12:12:22,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:12:22,174 INFO L93 Difference]: Finished difference Result 197 states and 197 transitions. [2018-10-02 12:12:22,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-10-02 12:12:22,174 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 192 [2018-10-02 12:12:22,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:12:22,175 INFO L225 Difference]: With dead ends: 197 [2018-10-02 12:12:22,175 INFO L226 Difference]: Without dead ends: 195 [2018-10-02 12:12:22,176 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s Time 1.9s impTime [2018-10-02 12:12:22,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-10-02 12:12:22,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2018-10-02 12:12:22,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-10-02 12:12:22,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2018-10-02 12:12:22,178 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 192 [2018-10-02 12:12:22,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:12:22,179 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2018-10-02 12:12:22,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-10-02 12:12:22,179 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2018-10-02 12:12:22,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-10-02 12:12:22,179 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:12:22,179 INFO L375 BasicCegarLoop]: trace histogram [96, 95, 1, 1, 1] [2018-10-02 12:12:22,180 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:12:22,180 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:12:22,180 INFO L82 PathProgramCache]: Analyzing trace with hash -986656435, now seen corresponding path program 95 times [2018-10-02 12:12:22,180 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:12:22,180 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:12:22,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:12:22,181 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:12:22,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:12:22,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:12:23,687 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:12:23,687 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:12:23,687 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 [2018-10-02 12:12:23,698 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:12:36,358 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 96 check-sat command(s) [2018-10-02 12:12:36,358 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:12:36,364 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:12:36,697 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:12:36,723 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:12:36,723 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-10-02 12:12:36,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-10-02 12:12:36,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-10-02 12:12:36,724 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:12:36,725 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand 98 states. [2018-10-02 12:12:37,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:12:37,319 INFO L93 Difference]: Finished difference Result 199 states and 199 transitions. [2018-10-02 12:12:37,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-10-02 12:12:37,320 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 194 [2018-10-02 12:12:37,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:12:37,321 INFO L225 Difference]: With dead ends: 199 [2018-10-02 12:12:37,321 INFO L226 Difference]: Without dead ends: 197 [2018-10-02 12:12:37,321 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 1.2s impTime [2018-10-02 12:12:37,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-10-02 12:12:37,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2018-10-02 12:12:37,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-10-02 12:12:37,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 197 transitions. [2018-10-02 12:12:37,325 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 197 transitions. Word has length 194 [2018-10-02 12:12:37,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:12:37,325 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 197 transitions. [2018-10-02 12:12:37,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-10-02 12:12:37,325 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 197 transitions. [2018-10-02 12:12:37,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-10-02 12:12:37,326 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:12:37,326 INFO L375 BasicCegarLoop]: trace histogram [97, 96, 1, 1, 1] [2018-10-02 12:12:37,326 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:12:37,327 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:12:37,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1010990471, now seen corresponding path program 96 times [2018-10-02 12:12:37,327 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:12:37,327 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:12:37,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:12:37,328 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:12:37,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:12:37,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:12:38,829 INFO L134 CoverageAnalysis]: Checked inductivity of 9312 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:12:38,830 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:12:38,830 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 [2018-10-02 12:12:38,837 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:12:41,571 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 97 check-sat command(s) [2018-10-02 12:12:41,571 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:12:41,577 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:12:41,903 INFO L134 CoverageAnalysis]: Checked inductivity of 9312 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:12:41,926 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:12:41,926 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-10-02 12:12:41,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-10-02 12:12:41,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-10-02 12:12:41,928 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:12:41,928 INFO L87 Difference]: Start difference. First operand 197 states and 197 transitions. Second operand 99 states. [2018-10-02 12:12:42,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:12:42,412 INFO L93 Difference]: Finished difference Result 201 states and 201 transitions. [2018-10-02 12:12:42,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-10-02 12:12:42,412 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 196 [2018-10-02 12:12:42,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:12:42,413 INFO L225 Difference]: With dead ends: 201 [2018-10-02 12:12:42,413 INFO L226 Difference]: Without dead ends: 199 [2018-10-02 12:12:42,413 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 1.2s impTime [2018-10-02 12:12:42,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-10-02 12:12:42,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2018-10-02 12:12:42,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-10-02 12:12:42,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 199 transitions. [2018-10-02 12:12:42,418 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 199 transitions. Word has length 196 [2018-10-02 12:12:42,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:12:42,418 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 199 transitions. [2018-10-02 12:12:42,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-10-02 12:12:42,418 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 199 transitions. [2018-10-02 12:12:42,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-10-02 12:12:42,419 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:12:42,420 INFO L375 BasicCegarLoop]: trace histogram [98, 97, 1, 1, 1] [2018-10-02 12:12:42,420 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:12:42,420 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:12:42,420 INFO L82 PathProgramCache]: Analyzing trace with hash 899285825, now seen corresponding path program 97 times [2018-10-02 12:12:42,420 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:12:42,420 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:12:42,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:12:42,421 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:12:42,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:12:42,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:12:44,108 INFO L134 CoverageAnalysis]: Checked inductivity of 9506 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:12:44,108 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:12:44,108 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 [2018-10-02 12:12:44,116 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:12:44,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:12:44,187 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:12:44,540 INFO L134 CoverageAnalysis]: Checked inductivity of 9506 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:12:44,560 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:12:44,560 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-10-02 12:12:44,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-10-02 12:12:44,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-10-02 12:12:44,561 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:12:44,561 INFO L87 Difference]: Start difference. First operand 199 states and 199 transitions. Second operand 100 states. [2018-10-02 12:12:45,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:12:45,233 INFO L93 Difference]: Finished difference Result 203 states and 203 transitions. [2018-10-02 12:12:45,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-10-02 12:12:45,234 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 198 [2018-10-02 12:12:45,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:12:45,235 INFO L225 Difference]: With dead ends: 203 [2018-10-02 12:12:45,235 INFO L226 Difference]: Without dead ends: 201 [2018-10-02 12:12:45,235 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 1.3s impTime [2018-10-02 12:12:45,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-10-02 12:12:45,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2018-10-02 12:12:45,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-10-02 12:12:45,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 201 transitions. [2018-10-02 12:12:45,238 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 201 transitions. Word has length 198 [2018-10-02 12:12:45,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:12:45,238 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 201 transitions. [2018-10-02 12:12:45,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-10-02 12:12:45,238 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 201 transitions. [2018-10-02 12:12:45,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-10-02 12:12:45,239 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:12:45,239 INFO L375 BasicCegarLoop]: trace histogram [99, 98, 1, 1, 1] [2018-10-02 12:12:45,239 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:12:45,239 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:12:45,240 INFO L82 PathProgramCache]: Analyzing trace with hash 925303419, now seen corresponding path program 98 times [2018-10-02 12:12:45,240 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:12:45,240 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:12:45,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:12:45,240 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:12:45,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:12:45,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-10-02 12:12:45,437 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-02 12:12:45,441 WARN L205 ceAbstractionStarter]: Timeout [2018-10-02 12:12:45,442 INFO L202 PluginConnector]: Adding new model array1.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.10 12:12:45 BoogieIcfgContainer [2018-10-02 12:12:45,442 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-02 12:12:45,442 INFO L168 Benchmark]: Toolchain (without parser) took 247174.35 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -81.8 MB). Free memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: 382.1 MB). Peak memory consumption was 300.3 MB. Max. memory is 7.1 GB. [2018-10-02 12:12:45,444 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 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. [2018-10-02 12:12:45,444 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.06 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. [2018-10-02 12:12:45,445 INFO L168 Benchmark]: Boogie Preprocessor took 19.30 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-02 12:12:45,445 INFO L168 Benchmark]: RCFGBuilder took 274.02 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. [2018-10-02 12:12:45,446 INFO L168 Benchmark]: TraceAbstraction took 246831.14 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -81.8 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 360.9 MB). Peak memory consumption was 279.1 MB. Max. memory is 7.1 GB. [2018-10-02 12:12:45,449 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 0.21 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 44.06 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 19.30 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 274.02 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 246831.14 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -81.8 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 360.9 MB). Peak memory consumption was 279.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 37]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 37). Cancelled while BasicCegarLoop was analyzing trace of length 201 with TraceHistMax 99, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while NestedInterpolantsBuilder was constructing predicates for 199 interpolants. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. TIMEOUT Result, 246.7s OverallTime, 99 OverallIterations, 99 TraceHistogramMax, 32.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 392 SDtfs, 0 SDslu, 7672 SDs, 0 SdLazy, 7770 SolverSat, 173 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 8.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14746 GetRequests, 9895 SyntacticMatches, 0 SemanticMatches, 4851 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 128.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=201occurred in iteration=98, 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, 98 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.8s SsaConstructionTime, 74.1s SatisfiabilityAnalysisTime, 134.1s InterpolantComputationTime, 19792 NumberOfCodeBlocks, 19792 NumberOfCodeBlocksAsserted, 2611 NumberOfCheckSat, 19597 ConstructedInterpolants, 0 QuantifiedInterpolants, 7722967 SizeOfPredicates, 97 NumberOfNonLiveVariables, 25026 ConjunctsInSsa, 4947 ConjunctsInUnsatCore, 195 InterpolantComputations, 1 PerfectInterpolantSequences, 0/627396 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/array1.i_3.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-02_12-12-45-458.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/array1.i_3.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-02_12-12-45-458.csv Completed graceful shutdown