java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/DivisibilityInterpolantRequired01-BackwardSuccess.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1cc990c [2018-09-30 23:48:01,615 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 23:48:01,619 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 23:48:01,636 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 23:48:01,637 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 23:48:01,640 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 23:48:01,642 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 23:48:01,644 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 23:48:01,645 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 23:48:01,646 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 23:48:01,647 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-30 23:48:01,647 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-30 23:48:01,648 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-30 23:48:01,649 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-30 23:48:01,650 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-30 23:48:01,651 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-30 23:48:01,652 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-30 23:48:01,654 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-30 23:48:01,655 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-30 23:48:01,657 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-30 23:48:01,658 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-30 23:48:01,659 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-30 23:48:01,661 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-30 23:48:01,662 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-30 23:48:01,662 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-30 23:48:01,663 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-30 23:48:01,664 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-30 23:48:01,664 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-30 23:48:01,665 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-30 23:48:01,666 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-30 23:48:01,666 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-30 23:48:01,667 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-30 23:48:01,667 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-30 23:48:01,668 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-30 23:48:01,669 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-30 23:48:01,669 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-30 23:48:01,670 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-30 23:48:01,687 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 23:48:01,687 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 23:48:01,688 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 23:48:01,688 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 23:48:01,692 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 23:48:01,693 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 23:48:01,693 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 23:48:01,693 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 23:48:01,694 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 23:48:01,694 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 23:48:01,695 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 23:48:01,695 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 23:48:01,695 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 23:48:01,695 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 23:48:01,695 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 23:48:01,696 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 23:48:01,696 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 23:48:01,696 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 23:48:01,696 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 23:48:01,696 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 23:48:01,698 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 23:48:01,698 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 23:48:01,698 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 23:48:01,698 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 23:48:01,698 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 23:48:01,699 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 23:48:01,699 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 23:48:01,699 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 23:48:01,699 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 23:48:01,699 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 23:48:01,749 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 23:48:01,766 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 23:48:01,772 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 23:48:01,774 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 23:48:01,774 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 23:48:01,775 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/DivisibilityInterpolantRequired01-BackwardSuccess.bpl [2018-09-30 23:48:01,775 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/DivisibilityInterpolantRequired01-BackwardSuccess.bpl' [2018-09-30 23:48:01,813 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 23:48:01,816 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 23:48:01,817 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 23:48:01,817 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 23:48:01,817 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 23:48:01,836 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:48:01" (1/1) ... [2018-09-30 23:48:01,846 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:48:01" (1/1) ... [2018-09-30 23:48:01,849 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-30 23:48:01,849 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-30 23:48:01,850 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-30 23:48:01,851 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 23:48:01,852 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 23:48:01,852 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 23:48:01,852 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 23:48:01,862 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:48:01" (1/1) ... [2018-09-30 23:48:01,863 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:48:01" (1/1) ... [2018-09-30 23:48:01,863 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:48:01" (1/1) ... [2018-09-30 23:48:01,865 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:48:01" (1/1) ... [2018-09-30 23:48:01,867 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:48:01" (1/1) ... [2018-09-30 23:48:01,871 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:48:01" (1/1) ... [2018-09-30 23:48:01,872 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:48:01" (1/1) ... [2018-09-30 23:48:01,873 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 23:48:01,874 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 23:48:01,874 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 23:48:01,874 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 23:48:01,875 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:48:01" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 23:48:01,925 INFO L130 BoogieDeclarations]: Found specification of procedure proc [2018-09-30 23:48:01,925 INFO L138 BoogieDeclarations]: Found implementation of procedure proc [2018-09-30 23:48:02,102 INFO L345 CfgBuilder]: Using library mode [2018-09-30 23:48:02,103 INFO L202 PluginConnector]: Adding new model DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 11:48:02 BoogieIcfgContainer [2018-09-30 23:48:02,103 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 23:48:02,107 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 23:48:02,107 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 23:48:02,110 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 23:48:02,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:48:01" (1/2) ... [2018-09-30 23:48:02,111 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f713641 and model type DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 11:48:02, skipping insertion in model container [2018-09-30 23:48:02,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 11:48:02" (2/2) ... [2018-09-30 23:48:02,114 INFO L112 eAbstractionObserver]: Analyzing ICFG DivisibilityInterpolantRequired01-BackwardSuccess.bpl [2018-09-30 23:48:02,125 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 23:48:02,135 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 23:48:02,189 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 23:48:02,190 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 23:48:02,190 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 23:48:02,190 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 23:48:02,190 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 23:48:02,190 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 23:48:02,191 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 23:48:02,191 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 23:48:02,191 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 23:48:02,207 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states. [2018-09-30 23:48:02,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2018-09-30 23:48:02,215 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:02,216 INFO L375 BasicCegarLoop]: trace histogram [1, 1] [2018-09-30 23:48:02,218 INFO L423 AbstractCegarLoop]: === Iteration 1 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:02,227 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:02,227 INFO L82 PathProgramCache]: Analyzing trace with hash 967, now seen corresponding path program 1 times [2018-09-30 23:48:02,231 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:02,232 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:02,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:02,282 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:48:02,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:02,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:02,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:02,395 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 23:48:02,395 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-09-30 23:48:02,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 23:48:02,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 23:48:02,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 23:48:02,413 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 3 states. [2018-09-30 23:48:02,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:02,459 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-30 23:48:02,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 23:48:02,462 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2018-09-30 23:48:02,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:02,473 INFO L225 Difference]: With dead ends: 9 [2018-09-30 23:48:02,473 INFO L226 Difference]: Without dead ends: 4 [2018-09-30 23:48:02,477 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 23:48:02,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4 states. [2018-09-30 23:48:02,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4 to 4. [2018-09-30 23:48:02,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-09-30 23:48:02,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 4 transitions. [2018-09-30 23:48:02,524 INFO L78 Accepts]: Start accepts. Automaton has 4 states and 4 transitions. Word has length 2 [2018-09-30 23:48:02,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:02,525 INFO L480 AbstractCegarLoop]: Abstraction has 4 states and 4 transitions. [2018-09-30 23:48:02,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 23:48:02,525 INFO L276 IsEmpty]: Start isEmpty. Operand 4 states and 4 transitions. [2018-09-30 23:48:02,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-30 23:48:02,526 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:02,526 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-30 23:48:02,527 INFO L423 AbstractCegarLoop]: === Iteration 2 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:02,527 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:02,528 INFO L82 PathProgramCache]: Analyzing trace with hash 29921, now seen corresponding path program 1 times [2018-09-30 23:48:02,528 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:02,528 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:02,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:02,530 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:48:02,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:02,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:02,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:02,691 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:02,692 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:48:02,708 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:48:02,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:02,727 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:02,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:02,766 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:02,767 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 2 [2018-09-30 23:48:02,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 23:48:02,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 23:48:02,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-30 23:48:02,770 INFO L87 Difference]: Start difference. First operand 4 states and 4 transitions. Second operand 4 states. [2018-09-30 23:48:02,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:02,818 INFO L93 Difference]: Finished difference Result 6 states and 6 transitions. [2018-09-30 23:48:02,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 23:48:02,822 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2018-09-30 23:48:02,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:02,822 INFO L225 Difference]: With dead ends: 6 [2018-09-30 23:48:02,823 INFO L226 Difference]: Without dead ends: 5 [2018-09-30 23:48:02,824 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-30 23:48:02,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-09-30 23:48:02,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-09-30 23:48:02,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-09-30 23:48:02,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-09-30 23:48:02,827 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-09-30 23:48:02,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:02,830 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-09-30 23:48:02,830 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 23:48:02,830 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-09-30 23:48:02,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-30 23:48:02,831 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:02,831 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1] [2018-09-30 23:48:02,831 INFO L423 AbstractCegarLoop]: === Iteration 3 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:02,832 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:02,832 INFO L82 PathProgramCache]: Analyzing trace with hash 927495, now seen corresponding path program 2 times [2018-09-30 23:48:02,832 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:02,832 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:02,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:02,833 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:48:02,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:02,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:02,955 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:02,955 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:02,956 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:48:02,965 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:48:02,971 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:48:02,971 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:02,972 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:02,992 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:03,015 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:03,015 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-30 23:48:03,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 23:48:03,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 23:48:03,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-30 23:48:03,016 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 5 states. [2018-09-30 23:48:03,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:03,045 INFO L93 Difference]: Finished difference Result 7 states and 7 transitions. [2018-09-30 23:48:03,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 23:48:03,045 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2018-09-30 23:48:03,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:03,046 INFO L225 Difference]: With dead ends: 7 [2018-09-30 23:48:03,046 INFO L226 Difference]: Without dead ends: 6 [2018-09-30 23:48:03,046 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-30 23:48:03,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-30 23:48:03,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-30 23:48:03,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-30 23:48:03,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-30 23:48:03,049 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-09-30 23:48:03,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:03,050 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-30 23:48:03,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 23:48:03,050 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-30 23:48:03,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-30 23:48:03,051 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:03,051 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1] [2018-09-30 23:48:03,051 INFO L423 AbstractCegarLoop]: === Iteration 4 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:03,051 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:03,052 INFO L82 PathProgramCache]: Analyzing trace with hash 28752289, now seen corresponding path program 3 times [2018-09-30 23:48:03,052 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:03,052 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:03,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:03,053 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:03,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:03,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:03,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:03,217 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:03,217 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:48:03,229 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:48:03,278 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-30 23:48:03,279 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:03,280 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:03,330 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:03,360 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:03,361 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-30 23:48:03,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 23:48:03,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 23:48:03,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-09-30 23:48:03,362 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 6 states. [2018-09-30 23:48:03,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:03,472 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-09-30 23:48:03,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 23:48:03,472 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2018-09-30 23:48:03,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:03,473 INFO L225 Difference]: With dead ends: 8 [2018-09-30 23:48:03,473 INFO L226 Difference]: Without dead ends: 7 [2018-09-30 23:48:03,473 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-09-30 23:48:03,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-30 23:48:03,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-30 23:48:03,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-30 23:48:03,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-30 23:48:03,476 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-09-30 23:48:03,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:03,477 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-30 23:48:03,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 23:48:03,477 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-30 23:48:03,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-30 23:48:03,477 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:03,477 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1] [2018-09-30 23:48:03,478 INFO L423 AbstractCegarLoop]: === Iteration 5 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:03,478 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:03,478 INFO L82 PathProgramCache]: Analyzing trace with hash 891320903, now seen corresponding path program 4 times [2018-09-30 23:48:03,478 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:03,478 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:03,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:03,479 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:03,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:03,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:03,599 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:03,600 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:03,600 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:48:03,610 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:48:03,627 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:48:03,628 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:03,629 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:03,637 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:03,657 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:03,658 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 23:48:03,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 23:48:03,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 23:48:03,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:48:03,659 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 7 states. [2018-09-30 23:48:03,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:03,809 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-30 23:48:03,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 23:48:03,810 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 6 [2018-09-30 23:48:03,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:03,810 INFO L225 Difference]: With dead ends: 9 [2018-09-30 23:48:03,810 INFO L226 Difference]: Without dead ends: 8 [2018-09-30 23:48:03,811 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:48:03,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-30 23:48:03,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-30 23:48:03,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-30 23:48:03,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-09-30 23:48:03,815 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-09-30 23:48:03,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:03,816 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-09-30 23:48:03,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 23:48:03,816 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-09-30 23:48:03,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-30 23:48:03,817 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:03,817 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1] [2018-09-30 23:48:03,817 INFO L423 AbstractCegarLoop]: === Iteration 6 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:03,818 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:03,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1861144161, now seen corresponding path program 5 times [2018-09-30 23:48:03,818 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:03,818 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:03,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:03,819 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:03,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:03,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:03,966 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:03,967 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:03,967 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:48:03,974 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:48:03,989 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-30 23:48:03,990 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:03,991 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:03,997 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:04,020 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:04,020 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 23:48:04,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 23:48:04,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 23:48:04,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:48:04,023 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 8 states. [2018-09-30 23:48:04,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:04,124 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-09-30 23:48:04,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 23:48:04,125 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2018-09-30 23:48:04,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:04,125 INFO L225 Difference]: With dead ends: 10 [2018-09-30 23:48:04,125 INFO L226 Difference]: Without dead ends: 9 [2018-09-30 23:48:04,126 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:48:04,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-30 23:48:04,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-30 23:48:04,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-30 23:48:04,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-30 23:48:04,129 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-09-30 23:48:04,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:04,130 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-30 23:48:04,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 23:48:04,130 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-30 23:48:04,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 23:48:04,130 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:04,131 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1] [2018-09-30 23:48:04,131 INFO L423 AbstractCegarLoop]: === Iteration 7 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:04,131 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:04,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1860894087, now seen corresponding path program 6 times [2018-09-30 23:48:04,131 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:04,132 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:04,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:04,133 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:04,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:04,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:04,623 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:04,623 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:04,624 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:48:04,636 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:48:04,644 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-30 23:48:04,645 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:04,646 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:04,654 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:04,676 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:04,676 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 23:48:04,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:48:04,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:48:04,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:48:04,677 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 9 states. [2018-09-30 23:48:04,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:04,784 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-30 23:48:04,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:48:04,785 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 8 [2018-09-30 23:48:04,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:04,786 INFO L225 Difference]: With dead ends: 11 [2018-09-30 23:48:04,786 INFO L226 Difference]: Without dead ends: 10 [2018-09-30 23:48:04,787 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:48:04,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-30 23:48:04,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-30 23:48:04,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-30 23:48:04,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-30 23:48:04,791 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-09-30 23:48:04,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:04,791 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-30 23:48:04,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:48:04,791 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-30 23:48:04,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 23:48:04,792 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:04,792 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1] [2018-09-30 23:48:04,792 INFO L423 AbstractCegarLoop]: === Iteration 8 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:04,793 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:04,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1853141793, now seen corresponding path program 7 times [2018-09-30 23:48:04,793 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:04,793 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:04,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:04,794 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:04,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:04,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:04,962 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:04,963 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:04,963 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:48:04,970 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:48:04,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:04,977 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:04,985 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:05,006 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:05,006 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:48:05,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:48:05,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:48:05,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:48:05,007 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 10 states. [2018-09-30 23:48:05,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:05,118 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-09-30 23:48:05,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:48:05,119 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2018-09-30 23:48:05,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:05,120 INFO L225 Difference]: With dead ends: 12 [2018-09-30 23:48:05,120 INFO L226 Difference]: Without dead ends: 11 [2018-09-30 23:48:05,121 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:48:05,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-30 23:48:05,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-30 23:48:05,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-30 23:48:05,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-30 23:48:05,125 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-09-30 23:48:05,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:05,125 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-30 23:48:05,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:48:05,126 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-30 23:48:05,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 23:48:05,126 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:05,126 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1] [2018-09-30 23:48:05,126 INFO L423 AbstractCegarLoop]: === Iteration 9 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:05,127 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:05,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1612820679, now seen corresponding path program 8 times [2018-09-30 23:48:05,127 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:05,127 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:05,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:05,128 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:48:05,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:05,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:05,324 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:05,325 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:05,325 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:48:05,341 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:48:05,360 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:48:05,361 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:05,362 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:05,369 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:05,391 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:05,392 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:48:05,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:48:05,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:48:05,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:48:05,393 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 11 states. [2018-09-30 23:48:05,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:05,501 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-30 23:48:05,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:48:05,501 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2018-09-30 23:48:05,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:05,502 INFO L225 Difference]: With dead ends: 13 [2018-09-30 23:48:05,502 INFO L226 Difference]: Without dead ends: 12 [2018-09-30 23:48:05,503 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:48:05,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-30 23:48:05,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-30 23:48:05,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-30 23:48:05,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-30 23:48:05,506 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-09-30 23:48:05,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:05,506 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-30 23:48:05,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:48:05,507 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-30 23:48:05,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 23:48:05,507 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:05,508 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1] [2018-09-30 23:48:05,508 INFO L423 AbstractCegarLoop]: === Iteration 10 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:05,508 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:05,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1542166559, now seen corresponding path program 9 times [2018-09-30 23:48:05,508 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:05,509 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:05,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:05,510 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:05,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:05,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:05,687 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:05,688 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:05,688 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:48:05,697 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:48:05,709 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-30 23:48:05,709 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:05,710 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:05,725 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:05,751 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:05,751 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:48:05,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 23:48:05,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 23:48:05,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-09-30 23:48:05,752 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 12 states. [2018-09-30 23:48:05,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:05,863 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-09-30 23:48:05,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 23:48:05,863 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2018-09-30 23:48:05,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:05,864 INFO L225 Difference]: With dead ends: 14 [2018-09-30 23:48:05,864 INFO L226 Difference]: Without dead ends: 13 [2018-09-30 23:48:05,865 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-09-30 23:48:05,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-30 23:48:05,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-30 23:48:05,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-30 23:48:05,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-30 23:48:05,868 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-09-30 23:48:05,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:05,868 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-30 23:48:05,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 23:48:05,868 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-30 23:48:05,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-30 23:48:05,869 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:05,869 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1] [2018-09-30 23:48:05,869 INFO L423 AbstractCegarLoop]: === Iteration 11 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:05,869 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:05,869 INFO L82 PathProgramCache]: Analyzing trace with hash -562523129, now seen corresponding path program 10 times [2018-09-30 23:48:05,869 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:05,870 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:05,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:05,870 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:05,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:05,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:06,145 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:06,145 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:06,146 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:48:06,158 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:48:06,172 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:48:06,172 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:06,174 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:06,190 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:06,211 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:06,212 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-30 23:48:06,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 23:48:06,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 23:48:06,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-09-30 23:48:06,213 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 13 states. [2018-09-30 23:48:06,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:06,378 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-30 23:48:06,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 23:48:06,379 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2018-09-30 23:48:06,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:06,380 INFO L225 Difference]: With dead ends: 15 [2018-09-30 23:48:06,381 INFO L226 Difference]: Without dead ends: 14 [2018-09-30 23:48:06,382 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-09-30 23:48:06,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-30 23:48:06,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-30 23:48:06,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-30 23:48:06,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-30 23:48:06,386 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-09-30 23:48:06,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:06,386 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-30 23:48:06,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 23:48:06,386 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-30 23:48:06,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 23:48:06,387 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:06,387 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1] [2018-09-30 23:48:06,387 INFO L423 AbstractCegarLoop]: === Iteration 12 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:06,387 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:06,388 INFO L82 PathProgramCache]: Analyzing trace with hash -258347871, now seen corresponding path program 11 times [2018-09-30 23:48:06,388 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:06,388 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:06,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:06,389 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:06,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:06,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:06,614 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:06,614 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:06,615 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:48:06,628 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:48:06,637 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 23:48:06,637 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:06,639 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:06,648 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:06,677 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:06,678 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-30 23:48:06,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 23:48:06,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 23:48:06,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:48:06,679 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 14 states. [2018-09-30 23:48:07,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:07,028 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-09-30 23:48:07,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 23:48:07,029 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-09-30 23:48:07,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:07,030 INFO L225 Difference]: With dead ends: 16 [2018-09-30 23:48:07,030 INFO L226 Difference]: Without dead ends: 15 [2018-09-30 23:48:07,030 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:48:07,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-30 23:48:07,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-30 23:48:07,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-30 23:48:07,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-30 23:48:07,034 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-09-30 23:48:07,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:07,034 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-30 23:48:07,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 23:48:07,035 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-30 23:48:07,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 23:48:07,035 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:07,035 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1] [2018-09-30 23:48:07,036 INFO L423 AbstractCegarLoop]: === Iteration 13 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:07,036 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:07,036 INFO L82 PathProgramCache]: Analyzing trace with hash 581150535, now seen corresponding path program 12 times [2018-09-30 23:48:07,036 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:07,036 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:07,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:07,037 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:07,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:07,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:07,277 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:07,277 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:07,277 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:48:07,285 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:48:07,295 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 23:48:07,296 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:07,298 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:07,307 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:07,331 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:07,331 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-30 23:48:07,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 23:48:07,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 23:48:07,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-09-30 23:48:07,332 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 15 states. [2018-09-30 23:48:07,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:07,506 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-30 23:48:07,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 23:48:07,506 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 14 [2018-09-30 23:48:07,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:07,507 INFO L225 Difference]: With dead ends: 17 [2018-09-30 23:48:07,508 INFO L226 Difference]: Without dead ends: 16 [2018-09-30 23:48:07,508 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-09-30 23:48:07,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-30 23:48:07,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-30 23:48:07,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 23:48:07,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-09-30 23:48:07,513 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-09-30 23:48:07,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:07,513 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-09-30 23:48:07,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 23:48:07,514 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-09-30 23:48:07,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:48:07,514 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:07,514 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1] [2018-09-30 23:48:07,515 INFO L423 AbstractCegarLoop]: === Iteration 14 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:07,515 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:07,515 INFO L82 PathProgramCache]: Analyzing trace with hash 835797345, now seen corresponding path program 13 times [2018-09-30 23:48:07,515 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:07,515 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:07,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:07,516 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:07,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:07,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:07,794 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:07,794 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:07,795 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:48:07,803 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:48:07,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:07,811 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:07,818 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:07,840 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:07,840 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-30 23:48:07,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 23:48:07,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 23:48:07,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-09-30 23:48:07,841 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 16 states. [2018-09-30 23:48:08,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:08,101 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-09-30 23:48:08,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 23:48:08,102 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 15 [2018-09-30 23:48:08,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:08,103 INFO L225 Difference]: With dead ends: 18 [2018-09-30 23:48:08,103 INFO L226 Difference]: Without dead ends: 17 [2018-09-30 23:48:08,104 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-09-30 23:48:08,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-30 23:48:08,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-30 23:48:08,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-30 23:48:08,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-30 23:48:08,108 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-09-30 23:48:08,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:08,108 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-30 23:48:08,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 23:48:08,108 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-30 23:48:08,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-30 23:48:08,109 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:08,109 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1] [2018-09-30 23:48:08,109 INFO L423 AbstractCegarLoop]: === Iteration 15 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:08,109 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:08,109 INFO L82 PathProgramCache]: Analyzing trace with hash 139913863, now seen corresponding path program 14 times [2018-09-30 23:48:08,110 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:08,110 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:08,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:08,111 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:48:08,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:08,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:08,396 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:08,396 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:08,396 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:48:08,406 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:48:08,447 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:48:08,448 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:08,451 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:08,486 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:08,507 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:08,508 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-30 23:48:08,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 23:48:08,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 23:48:08,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-09-30 23:48:08,509 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 17 states. [2018-09-30 23:48:08,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:08,833 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-30 23:48:08,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 23:48:08,834 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 16 [2018-09-30 23:48:08,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:08,835 INFO L225 Difference]: With dead ends: 19 [2018-09-30 23:48:08,835 INFO L226 Difference]: Without dead ends: 18 [2018-09-30 23:48:08,836 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-09-30 23:48:08,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-30 23:48:08,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-30 23:48:08,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 23:48:08,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-09-30 23:48:08,841 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-09-30 23:48:08,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:08,841 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-09-30 23:48:08,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 23:48:08,841 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-09-30 23:48:08,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:48:08,842 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:08,842 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1] [2018-09-30 23:48:08,842 INFO L423 AbstractCegarLoop]: === Iteration 16 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:08,843 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:08,843 INFO L82 PathProgramCache]: Analyzing trace with hash 42362401, now seen corresponding path program 15 times [2018-09-30 23:48:08,843 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:08,843 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:08,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:08,844 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:08,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:08,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:09,132 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:09,133 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:09,133 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:48:09,142 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:48:09,162 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 23:48:09,163 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:09,164 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:09,178 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:09,198 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:09,199 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-30 23:48:09,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 23:48:09,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 23:48:09,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-09-30 23:48:09,200 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 18 states. [2018-09-30 23:48:09,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:09,395 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-09-30 23:48:09,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 23:48:09,396 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 17 [2018-09-30 23:48:09,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:09,397 INFO L225 Difference]: With dead ends: 20 [2018-09-30 23:48:09,397 INFO L226 Difference]: Without dead ends: 19 [2018-09-30 23:48:09,398 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-09-30 23:48:09,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-30 23:48:09,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-30 23:48:09,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-30 23:48:09,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-30 23:48:09,402 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-09-30 23:48:09,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:09,402 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-30 23:48:09,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 23:48:09,402 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-30 23:48:09,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 23:48:09,403 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:09,403 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1] [2018-09-30 23:48:09,403 INFO L423 AbstractCegarLoop]: === Iteration 17 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:09,404 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:09,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1313234375, now seen corresponding path program 16 times [2018-09-30 23:48:09,404 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:09,404 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:09,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:09,405 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:09,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:09,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:09,712 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:09,712 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:09,712 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:48:09,719 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:48:09,726 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:48:09,726 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:09,729 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:09,737 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:09,768 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:09,768 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-30 23:48:09,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 23:48:09,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 23:48:09,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-09-30 23:48:09,769 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 19 states. [2018-09-30 23:48:10,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:10,039 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-30 23:48:10,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 23:48:10,039 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 18 [2018-09-30 23:48:10,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:10,040 INFO L225 Difference]: With dead ends: 21 [2018-09-30 23:48:10,040 INFO L226 Difference]: Without dead ends: 20 [2018-09-30 23:48:10,041 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-09-30 23:48:10,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-30 23:48:10,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-30 23:48:10,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 23:48:10,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-09-30 23:48:10,045 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-09-30 23:48:10,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:10,046 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-09-30 23:48:10,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 23:48:10,046 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-09-30 23:48:10,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:48:10,046 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:10,047 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1] [2018-09-30 23:48:10,047 INFO L423 AbstractCegarLoop]: === Iteration 18 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:10,047 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:10,047 INFO L82 PathProgramCache]: Analyzing trace with hash 2055559905, now seen corresponding path program 17 times [2018-09-30 23:48:10,047 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:10,047 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:10,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:10,048 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:10,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:10,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:10,555 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:10,555 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:10,555 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:48:10,564 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:48:10,576 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-30 23:48:10,576 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:10,578 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:10,586 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:10,617 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:10,617 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-30 23:48:10,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 23:48:10,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 23:48:10,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-09-30 23:48:10,618 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 20 states. [2018-09-30 23:48:10,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:10,911 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-09-30 23:48:10,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 23:48:10,911 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 19 [2018-09-30 23:48:10,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:10,912 INFO L225 Difference]: With dead ends: 22 [2018-09-30 23:48:10,912 INFO L226 Difference]: Without dead ends: 21 [2018-09-30 23:48:10,913 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-09-30 23:48:10,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-30 23:48:10,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-30 23:48:10,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-30 23:48:10,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-30 23:48:10,918 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-09-30 23:48:10,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:10,919 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-30 23:48:10,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 23:48:10,919 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-30 23:48:10,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 23:48:10,920 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:10,920 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1] [2018-09-30 23:48:10,920 INFO L423 AbstractCegarLoop]: === Iteration 19 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:10,920 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:10,921 INFO L82 PathProgramCache]: Analyzing trace with hash -702152441, now seen corresponding path program 18 times [2018-09-30 23:48:10,921 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:10,921 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:10,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:10,922 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:10,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:10,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:11,415 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:11,415 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:11,415 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:48:11,423 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:48:11,467 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-09-30 23:48:11,467 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:11,469 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:11,481 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:11,502 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:11,502 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-30 23:48:11,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 23:48:11,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 23:48:11,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-09-30 23:48:11,503 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 21 states. [2018-09-30 23:48:11,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:11,850 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-30 23:48:11,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 23:48:11,851 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 20 [2018-09-30 23:48:11,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:11,852 INFO L225 Difference]: With dead ends: 23 [2018-09-30 23:48:11,852 INFO L226 Difference]: Without dead ends: 22 [2018-09-30 23:48:11,853 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-09-30 23:48:11,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-30 23:48:11,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-30 23:48:11,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 23:48:11,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-09-30 23:48:11,858 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-09-30 23:48:11,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:11,858 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-09-30 23:48:11,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 23:48:11,858 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-09-30 23:48:11,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 23:48:11,859 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:11,859 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1] [2018-09-30 23:48:11,859 INFO L423 AbstractCegarLoop]: === Iteration 20 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:11,859 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:11,860 INFO L82 PathProgramCache]: Analyzing trace with hash -291889247, now seen corresponding path program 19 times [2018-09-30 23:48:11,860 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:11,860 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:11,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:11,861 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:11,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:11,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:12,195 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:12,196 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:12,196 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:48:12,204 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:48:12,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:12,214 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:12,222 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:12,251 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:12,252 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-30 23:48:12,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 23:48:12,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 23:48:12,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-09-30 23:48:12,253 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 22 states. [2018-09-30 23:48:12,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:12,629 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-09-30 23:48:12,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 23:48:12,630 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 21 [2018-09-30 23:48:12,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:12,630 INFO L225 Difference]: With dead ends: 24 [2018-09-30 23:48:12,631 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 23:48:12,632 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-09-30 23:48:12,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 23:48:12,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-30 23:48:12,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-30 23:48:12,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-30 23:48:12,636 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-09-30 23:48:12,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:12,637 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-30 23:48:12,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 23:48:12,637 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-30 23:48:12,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 23:48:12,638 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:12,638 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1] [2018-09-30 23:48:12,638 INFO L423 AbstractCegarLoop]: === Iteration 21 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:12,638 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:12,638 INFO L82 PathProgramCache]: Analyzing trace with hash -458632121, now seen corresponding path program 20 times [2018-09-30 23:48:12,639 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:12,639 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:12,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:12,640 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:48:12,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:12,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:13,386 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:13,387 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:13,387 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:48:13,398 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:48:13,407 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:48:13,407 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:13,409 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:13,417 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:13,438 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:13,438 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-30 23:48:13,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-30 23:48:13,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-30 23:48:13,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-09-30 23:48:13,439 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 23 states. [2018-09-30 23:48:13,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:13,789 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-30 23:48:13,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 23:48:13,789 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 22 [2018-09-30 23:48:13,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:13,790 INFO L225 Difference]: With dead ends: 25 [2018-09-30 23:48:13,790 INFO L226 Difference]: Without dead ends: 24 [2018-09-30 23:48:13,791 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-09-30 23:48:13,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-30 23:48:13,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-30 23:48:13,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 23:48:13,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-09-30 23:48:13,796 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-09-30 23:48:13,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:13,796 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-09-30 23:48:13,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-30 23:48:13,796 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-09-30 23:48:13,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-30 23:48:13,797 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:13,797 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1] [2018-09-30 23:48:13,797 INFO L423 AbstractCegarLoop]: === Iteration 22 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:13,798 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:13,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1332693919, now seen corresponding path program 21 times [2018-09-30 23:48:13,798 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:13,798 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:13,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:13,799 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:13,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:13,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:14,193 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:14,194 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:14,194 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:48:14,202 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:48:14,214 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-30 23:48:14,215 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:14,217 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:14,226 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:14,252 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:14,252 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-30 23:48:14,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 23:48:14,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 23:48:14,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-09-30 23:48:14,253 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 24 states. [2018-09-30 23:48:14,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:14,654 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-09-30 23:48:14,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 23:48:14,656 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 23 [2018-09-30 23:48:14,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:14,657 INFO L225 Difference]: With dead ends: 26 [2018-09-30 23:48:14,657 INFO L226 Difference]: Without dead ends: 25 [2018-09-30 23:48:14,658 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-09-30 23:48:14,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-30 23:48:14,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-30 23:48:14,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-30 23:48:14,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-30 23:48:14,663 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-09-30 23:48:14,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:14,664 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-30 23:48:14,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 23:48:14,664 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-30 23:48:14,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-30 23:48:14,664 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:14,664 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1] [2018-09-30 23:48:14,665 INFO L423 AbstractCegarLoop]: === Iteration 23 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:14,665 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:14,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1636161415, now seen corresponding path program 22 times [2018-09-30 23:48:14,665 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:14,665 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:14,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:14,666 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:14,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:14,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:15,211 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:15,211 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:15,211 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:48:15,219 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:48:15,228 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:48:15,229 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:15,231 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:15,252 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:15,280 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:15,280 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-30 23:48:15,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-30 23:48:15,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-30 23:48:15,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-09-30 23:48:15,281 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 25 states. [2018-09-30 23:48:15,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:15,677 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-30 23:48:15,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 23:48:15,678 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 24 [2018-09-30 23:48:15,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:15,678 INFO L225 Difference]: With dead ends: 27 [2018-09-30 23:48:15,679 INFO L226 Difference]: Without dead ends: 26 [2018-09-30 23:48:15,679 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-09-30 23:48:15,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-30 23:48:15,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-30 23:48:15,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 23:48:15,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-09-30 23:48:15,684 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-09-30 23:48:15,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:15,684 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-09-30 23:48:15,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-30 23:48:15,684 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-09-30 23:48:15,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-30 23:48:15,685 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:15,685 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1] [2018-09-30 23:48:15,685 INFO L423 AbstractCegarLoop]: === Iteration 24 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:15,685 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:15,685 INFO L82 PathProgramCache]: Analyzing trace with hash -818603743, now seen corresponding path program 23 times [2018-09-30 23:48:15,685 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:15,685 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:15,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:15,686 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:15,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:15,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:16,069 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:16,069 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:16,069 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:48:16,076 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:48:16,089 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-30 23:48:16,089 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:16,091 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:16,100 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:16,131 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:16,131 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-30 23:48:16,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 23:48:16,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 23:48:16,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-09-30 23:48:16,132 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 26 states. [2018-09-30 23:48:17,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:17,054 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-09-30 23:48:17,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 23:48:17,055 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 25 [2018-09-30 23:48:17,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:17,055 INFO L225 Difference]: With dead ends: 28 [2018-09-30 23:48:17,055 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 23:48:17,056 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-09-30 23:48:17,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 23:48:17,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-30 23:48:17,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-30 23:48:17,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-30 23:48:17,060 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-09-30 23:48:17,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:17,060 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-30 23:48:17,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 23:48:17,060 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-30 23:48:17,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-30 23:48:17,060 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:17,060 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1] [2018-09-30 23:48:17,061 INFO L423 AbstractCegarLoop]: === Iteration 25 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:17,061 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:17,061 INFO L82 PathProgramCache]: Analyzing trace with hash 393087687, now seen corresponding path program 24 times [2018-09-30 23:48:17,061 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:17,061 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:17,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:17,062 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:17,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:17,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:17,574 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:17,575 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:17,575 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:48:17,584 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:48:17,596 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-30 23:48:17,596 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:17,597 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:17,606 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:17,635 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:17,636 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-30 23:48:17,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-30 23:48:17,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-30 23:48:17,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-09-30 23:48:17,637 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 27 states. [2018-09-30 23:48:18,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:18,141 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-30 23:48:18,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 23:48:18,142 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 26 [2018-09-30 23:48:18,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:18,143 INFO L225 Difference]: With dead ends: 29 [2018-09-30 23:48:18,143 INFO L226 Difference]: Without dead ends: 28 [2018-09-30 23:48:18,144 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-09-30 23:48:18,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-30 23:48:18,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-30 23:48:18,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 23:48:18,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-09-30 23:48:18,148 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-09-30 23:48:18,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:18,149 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-09-30 23:48:18,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-30 23:48:18,149 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-09-30 23:48:18,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-30 23:48:18,149 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:18,149 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1] [2018-09-30 23:48:18,150 INFO L423 AbstractCegarLoop]: === Iteration 26 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:18,150 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:18,150 INFO L82 PathProgramCache]: Analyzing trace with hash -699183647, now seen corresponding path program 25 times [2018-09-30 23:48:18,150 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:18,150 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:18,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:18,151 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:18,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:18,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:18,641 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:18,642 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:18,642 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:48:18,650 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:48:18,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:18,660 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:18,669 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:18,690 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:18,690 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-30 23:48:18,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 23:48:18,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 23:48:18,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-09-30 23:48:18,692 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 28 states. [2018-09-30 23:48:19,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:19,204 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-09-30 23:48:19,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-30 23:48:19,205 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 27 [2018-09-30 23:48:19,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:19,205 INFO L225 Difference]: With dead ends: 30 [2018-09-30 23:48:19,206 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 23:48:19,206 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-09-30 23:48:19,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 23:48:19,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-30 23:48:19,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-30 23:48:19,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-30 23:48:19,211 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-09-30 23:48:19,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:19,212 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-30 23:48:19,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 23:48:19,212 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-30 23:48:19,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-30 23:48:19,213 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:19,213 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1] [2018-09-30 23:48:19,213 INFO L423 AbstractCegarLoop]: === Iteration 27 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:19,213 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:19,213 INFO L82 PathProgramCache]: Analyzing trace with hash -199856633, now seen corresponding path program 26 times [2018-09-30 23:48:19,214 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:19,214 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:19,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:19,215 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:48:19,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:19,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:19,694 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:19,694 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:19,694 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:48:19,701 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:48:19,711 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:48:19,711 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:19,713 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:19,728 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:19,752 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:19,753 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-30 23:48:19,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 23:48:19,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 23:48:19,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-09-30 23:48:19,754 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 29 states. [2018-09-30 23:48:20,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:20,230 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-30 23:48:20,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 23:48:20,230 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 28 [2018-09-30 23:48:20,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:20,231 INFO L225 Difference]: With dead ends: 31 [2018-09-30 23:48:20,231 INFO L226 Difference]: Without dead ends: 30 [2018-09-30 23:48:20,232 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-09-30 23:48:20,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-30 23:48:20,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-30 23:48:20,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 23:48:20,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-09-30 23:48:20,236 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-09-30 23:48:20,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:20,236 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-09-30 23:48:20,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 23:48:20,236 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-09-30 23:48:20,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-30 23:48:20,237 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:20,237 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1] [2018-09-30 23:48:20,237 INFO L423 AbstractCegarLoop]: === Iteration 28 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:20,238 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:20,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1900588383, now seen corresponding path program 27 times [2018-09-30 23:48:20,238 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:20,238 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:20,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:20,239 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:20,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:20,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:20,701 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:20,701 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:20,701 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:48:20,710 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:48:20,724 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-30 23:48:20,724 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:20,726 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:20,735 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:20,759 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:20,759 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-30 23:48:20,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 23:48:20,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 23:48:20,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2018-09-30 23:48:20,760 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 30 states. [2018-09-30 23:48:21,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:21,489 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-09-30 23:48:21,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-30 23:48:21,489 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 29 [2018-09-30 23:48:21,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:21,490 INFO L225 Difference]: With dead ends: 32 [2018-09-30 23:48:21,490 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 23:48:21,490 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2018-09-30 23:48:21,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 23:48:21,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-30 23:48:21,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-30 23:48:21,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-30 23:48:21,494 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-09-30 23:48:21,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:21,494 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-30 23:48:21,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 23:48:21,494 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-30 23:48:21,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-30 23:48:21,495 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:21,495 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1] [2018-09-30 23:48:21,495 INFO L423 AbstractCegarLoop]: === Iteration 29 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:21,495 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:21,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1211302215, now seen corresponding path program 28 times [2018-09-30 23:48:21,496 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:21,496 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:21,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:21,496 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:21,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:21,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:22,053 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:22,054 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:22,054 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:48:22,062 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:48:22,071 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:48:22,071 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:22,074 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:22,089 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:22,118 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:22,118 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-30 23:48:22,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-30 23:48:22,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-30 23:48:22,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-09-30 23:48:22,119 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 31 states. [2018-09-30 23:48:22,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:22,691 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-30 23:48:22,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 23:48:22,691 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 30 [2018-09-30 23:48:22,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:22,692 INFO L225 Difference]: With dead ends: 33 [2018-09-30 23:48:22,692 INFO L226 Difference]: Without dead ends: 32 [2018-09-30 23:48:22,693 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-09-30 23:48:22,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-30 23:48:22,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-30 23:48:22,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 23:48:22,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-09-30 23:48:22,698 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-09-30 23:48:22,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:22,698 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-09-30 23:48:22,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-30 23:48:22,698 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-09-30 23:48:22,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-30 23:48:22,699 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:22,699 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1] [2018-09-30 23:48:22,699 INFO L423 AbstractCegarLoop]: === Iteration 30 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:22,699 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:22,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1104337055, now seen corresponding path program 29 times [2018-09-30 23:48:22,699 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:22,700 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:22,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:22,700 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:22,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:22,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:23,240 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:23,240 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:23,240 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:48:23,252 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:48:23,267 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-30 23:48:23,267 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:23,269 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:23,287 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:23,312 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:23,313 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-30 23:48:23,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-30 23:48:23,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-30 23:48:23,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2018-09-30 23:48:23,314 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 32 states. [2018-09-30 23:48:23,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:23,925 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-09-30 23:48:23,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 23:48:23,926 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 31 [2018-09-30 23:48:23,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:23,927 INFO L225 Difference]: With dead ends: 34 [2018-09-30 23:48:23,927 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 23:48:23,928 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2018-09-30 23:48:23,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 23:48:23,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-30 23:48:23,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-30 23:48:23,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-30 23:48:23,932 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-09-30 23:48:23,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:23,933 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-30 23:48:23,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-30 23:48:23,933 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-30 23:48:23,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-30 23:48:23,933 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:23,933 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1] [2018-09-30 23:48:23,934 INFO L423 AbstractCegarLoop]: === Iteration 31 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:23,934 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:23,934 INFO L82 PathProgramCache]: Analyzing trace with hash 125289607, now seen corresponding path program 30 times [2018-09-30 23:48:23,934 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:23,934 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:23,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:23,935 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:23,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:23,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:24,598 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:24,599 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:24,599 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:48:24,608 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:48:24,623 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-30 23:48:24,623 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:24,625 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:24,652 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:24,681 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:24,681 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-30 23:48:24,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-30 23:48:24,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-30 23:48:24,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 23:48:24,682 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 33 states. [2018-09-30 23:48:25,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:25,315 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-30 23:48:25,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 23:48:25,315 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 32 [2018-09-30 23:48:25,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:25,316 INFO L225 Difference]: With dead ends: 35 [2018-09-30 23:48:25,316 INFO L226 Difference]: Without dead ends: 34 [2018-09-30 23:48:25,317 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 23:48:25,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-30 23:48:25,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-30 23:48:25,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 23:48:25,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-09-30 23:48:25,321 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-09-30 23:48:25,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:25,321 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-09-30 23:48:25,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-30 23:48:25,321 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-09-30 23:48:25,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-30 23:48:25,322 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:25,322 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1] [2018-09-30 23:48:25,322 INFO L423 AbstractCegarLoop]: === Iteration 32 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:25,322 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:25,322 INFO L82 PathProgramCache]: Analyzing trace with hash -410989535, now seen corresponding path program 31 times [2018-09-30 23:48:25,322 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:25,322 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:25,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:25,323 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:25,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:25,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:26,442 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:26,442 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:26,442 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:48:26,452 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:48:26,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:26,463 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:26,475 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:26,499 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:26,499 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-30 23:48:26,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 23:48:26,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 23:48:26,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 23:48:26,500 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 34 states. [2018-09-30 23:48:27,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:27,416 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-09-30 23:48:27,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 23:48:27,416 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 33 [2018-09-30 23:48:27,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:27,417 INFO L225 Difference]: With dead ends: 36 [2018-09-30 23:48:27,417 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 23:48:27,418 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 23:48:27,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 23:48:27,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-30 23:48:27,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-30 23:48:27,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-30 23:48:27,423 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-09-30 23:48:27,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:27,423 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-30 23:48:27,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 23:48:27,423 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-30 23:48:27,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-30 23:48:27,424 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:27,424 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1] [2018-09-30 23:48:27,424 INFO L423 AbstractCegarLoop]: === Iteration 33 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:27,424 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:27,424 INFO L82 PathProgramCache]: Analyzing trace with hash 144226247, now seen corresponding path program 32 times [2018-09-30 23:48:27,424 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:27,425 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:27,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:27,425 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:48:27,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:27,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:28,051 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:28,051 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:28,051 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:48:28,059 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:48:28,072 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:48:28,072 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:28,074 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:28,114 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:28,146 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:28,147 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-30 23:48:28,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-30 23:48:28,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-30 23:48:28,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 23:48:28,148 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 35 states. [2018-09-30 23:48:29,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:29,053 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-30 23:48:29,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 23:48:29,054 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 34 [2018-09-30 23:48:29,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:29,054 INFO L225 Difference]: With dead ends: 37 [2018-09-30 23:48:29,055 INFO L226 Difference]: Without dead ends: 36 [2018-09-30 23:48:29,055 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 23:48:29,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-30 23:48:29,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-30 23:48:29,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-30 23:48:29,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-09-30 23:48:29,060 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-09-30 23:48:29,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:29,060 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-09-30 23:48:29,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-30 23:48:29,060 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-09-30 23:48:29,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-30 23:48:29,061 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:29,061 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1] [2018-09-30 23:48:29,061 INFO L423 AbstractCegarLoop]: === Iteration 34 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:29,061 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:29,061 INFO L82 PathProgramCache]: Analyzing trace with hash 176046305, now seen corresponding path program 33 times [2018-09-30 23:48:29,061 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:29,061 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:29,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:29,062 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:29,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:29,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:30,561 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:30,562 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:30,562 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:48:30,569 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:48:30,587 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-30 23:48:30,587 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:30,589 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:30,597 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:30,617 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:30,617 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-30 23:48:30,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 23:48:30,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 23:48:30,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 23:48:30,618 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 36 states. [2018-09-30 23:48:31,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:31,369 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-09-30 23:48:31,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 23:48:31,369 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 35 [2018-09-30 23:48:31,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:31,370 INFO L225 Difference]: With dead ends: 38 [2018-09-30 23:48:31,370 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 23:48:31,371 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 23:48:31,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 23:48:31,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-30 23:48:31,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-30 23:48:31,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-30 23:48:31,376 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-09-30 23:48:31,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:31,376 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-30 23:48:31,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 23:48:31,376 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-30 23:48:31,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-30 23:48:31,377 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:31,377 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1] [2018-09-30 23:48:31,377 INFO L423 AbstractCegarLoop]: === Iteration 35 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:31,377 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:31,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1162468103, now seen corresponding path program 34 times [2018-09-30 23:48:31,378 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:31,378 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:31,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:31,378 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:31,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:31,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:32,797 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:32,797 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:32,797 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:48:32,804 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:48:32,813 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:48:32,814 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:32,816 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:32,832 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:32,862 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:32,862 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-30 23:48:32,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-30 23:48:32,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-30 23:48:32,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 23:48:32,863 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 37 states. [2018-09-30 23:48:33,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:33,656 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-30 23:48:33,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 23:48:33,656 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 36 [2018-09-30 23:48:33,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:33,657 INFO L225 Difference]: With dead ends: 39 [2018-09-30 23:48:33,657 INFO L226 Difference]: Without dead ends: 38 [2018-09-30 23:48:33,658 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 23:48:33,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-30 23:48:33,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-30 23:48:33,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-30 23:48:33,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-09-30 23:48:33,661 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-09-30 23:48:33,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:33,662 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-09-30 23:48:33,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-30 23:48:33,662 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-09-30 23:48:33,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-30 23:48:33,662 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:33,662 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1] [2018-09-30 23:48:33,662 INFO L423 AbstractCegarLoop]: === Iteration 36 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:33,662 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:33,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1676772769, now seen corresponding path program 35 times [2018-09-30 23:48:33,663 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:33,663 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:33,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:33,663 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:33,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:33,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:34,420 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:34,420 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:34,420 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:48:34,427 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:48:34,444 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-30 23:48:34,444 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:34,446 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:34,454 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:34,474 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:34,475 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-30 23:48:34,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 23:48:34,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 23:48:34,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 23:48:34,476 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 38 states. [2018-09-30 23:48:35,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:35,306 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-09-30 23:48:35,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-30 23:48:35,307 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 37 [2018-09-30 23:48:35,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:35,308 INFO L225 Difference]: With dead ends: 40 [2018-09-30 23:48:35,308 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 23:48:35,309 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 23:48:35,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 23:48:35,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-30 23:48:35,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-30 23:48:35,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-30 23:48:35,313 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-09-30 23:48:35,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:35,314 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-30 23:48:35,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 23:48:35,314 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-30 23:48:35,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-30 23:48:35,315 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:35,315 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1] [2018-09-30 23:48:35,315 INFO L423 AbstractCegarLoop]: === Iteration 37 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:35,316 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:35,316 INFO L82 PathProgramCache]: Analyzing trace with hash 440348231, now seen corresponding path program 36 times [2018-09-30 23:48:35,316 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:35,316 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:35,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:35,317 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:35,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:35,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:36,406 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:36,406 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:36,406 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:48:36,415 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:48:36,436 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-30 23:48:36,436 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:36,439 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:36,449 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:36,469 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:36,469 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-30 23:48:36,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-30 23:48:36,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-30 23:48:36,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 23:48:36,470 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 39 states. [2018-09-30 23:48:37,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:37,510 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-30 23:48:37,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 23:48:37,510 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 38 [2018-09-30 23:48:37,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:37,511 INFO L225 Difference]: With dead ends: 41 [2018-09-30 23:48:37,511 INFO L226 Difference]: Without dead ends: 40 [2018-09-30 23:48:37,512 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 23:48:37,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-30 23:48:37,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-30 23:48:37,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-30 23:48:37,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-09-30 23:48:37,516 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-09-30 23:48:37,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:37,516 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-09-30 23:48:37,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-30 23:48:37,516 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-09-30 23:48:37,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-30 23:48:37,517 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:37,517 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1] [2018-09-30 23:48:37,517 INFO L423 AbstractCegarLoop]: === Iteration 38 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:37,517 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:37,517 INFO L82 PathProgramCache]: Analyzing trace with hash 765893217, now seen corresponding path program 37 times [2018-09-30 23:48:37,517 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:37,518 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:37,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:37,518 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:37,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:37,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:38,964 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:38,964 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:38,964 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:48:38,972 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:48:38,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:38,986 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:38,995 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:39,017 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:39,017 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-30 23:48:39,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-30 23:48:39,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-30 23:48:39,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 23:48:39,018 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 40 states. [2018-09-30 23:48:39,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:39,938 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-09-30 23:48:39,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-30 23:48:39,938 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 39 [2018-09-30 23:48:39,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:39,939 INFO L225 Difference]: With dead ends: 42 [2018-09-30 23:48:39,939 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 23:48:39,940 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 23:48:39,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 23:48:39,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-30 23:48:39,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-30 23:48:39,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-30 23:48:39,943 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-09-30 23:48:39,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:39,943 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-30 23:48:39,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-30 23:48:39,943 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-30 23:48:39,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-30 23:48:39,944 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:39,944 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1] [2018-09-30 23:48:39,944 INFO L423 AbstractCegarLoop]: === Iteration 39 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:39,944 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:39,944 INFO L82 PathProgramCache]: Analyzing trace with hash -2027114105, now seen corresponding path program 38 times [2018-09-30 23:48:39,944 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:39,945 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:39,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:39,945 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:48:39,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:39,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:41,433 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:41,433 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:41,433 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:48:41,440 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:48:41,453 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:48:41,453 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:41,455 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:41,464 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:41,484 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:41,484 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-30 23:48:41,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-30 23:48:41,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-30 23:48:41,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 23:48:41,485 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 41 states. [2018-09-30 23:48:42,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:42,624 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-30 23:48:42,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 23:48:42,624 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 40 [2018-09-30 23:48:42,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:42,625 INFO L225 Difference]: With dead ends: 43 [2018-09-30 23:48:42,625 INFO L226 Difference]: Without dead ends: 42 [2018-09-30 23:48:42,626 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 23:48:42,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-30 23:48:42,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-30 23:48:42,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-30 23:48:42,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-09-30 23:48:42,630 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-09-30 23:48:42,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:42,630 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-09-30 23:48:42,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-30 23:48:42,630 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-09-30 23:48:42,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-30 23:48:42,630 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:42,630 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1] [2018-09-30 23:48:42,631 INFO L423 AbstractCegarLoop]: === Iteration 40 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:42,631 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:42,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1583972129, now seen corresponding path program 39 times [2018-09-30 23:48:42,631 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:42,631 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:42,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:42,632 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:42,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:42,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:43,661 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:43,662 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:43,662 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:48:43,669 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:48:43,691 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-09-30 23:48:43,691 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:43,693 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:43,705 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:43,725 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:43,725 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-30 23:48:43,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-30 23:48:43,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-30 23:48:43,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 23:48:43,727 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 42 states. [2018-09-30 23:48:44,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:44,769 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-09-30 23:48:44,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-30 23:48:44,769 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 41 [2018-09-30 23:48:44,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:44,770 INFO L225 Difference]: With dead ends: 44 [2018-09-30 23:48:44,770 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 23:48:44,771 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 23:48:44,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 23:48:44,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-30 23:48:44,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-30 23:48:44,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-30 23:48:44,774 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-09-30 23:48:44,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:44,774 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-30 23:48:44,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-30 23:48:44,774 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-30 23:48:44,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-30 23:48:44,775 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:44,775 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1] [2018-09-30 23:48:44,775 INFO L423 AbstractCegarLoop]: === Iteration 41 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:44,775 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:44,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1858495687, now seen corresponding path program 40 times [2018-09-30 23:48:44,776 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:44,776 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:44,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:44,776 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:44,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:44,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:45,686 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:45,687 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:45,687 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:48:45,694 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:48:45,706 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:48:45,706 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:45,708 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:45,718 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:45,742 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:45,742 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-30 23:48:45,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-30 23:48:45,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-30 23:48:45,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 23:48:45,743 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 43 states. [2018-09-30 23:48:46,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:46,835 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-30 23:48:46,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 23:48:46,835 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 42 [2018-09-30 23:48:46,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:46,836 INFO L225 Difference]: With dead ends: 45 [2018-09-30 23:48:46,836 INFO L226 Difference]: Without dead ends: 44 [2018-09-30 23:48:46,837 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 23:48:46,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-30 23:48:46,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-30 23:48:46,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-30 23:48:46,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-09-30 23:48:46,840 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-09-30 23:48:46,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:46,840 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-09-30 23:48:46,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-30 23:48:46,840 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-09-30 23:48:46,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-30 23:48:46,841 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:46,841 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1] [2018-09-30 23:48:46,841 INFO L423 AbstractCegarLoop]: === Iteration 42 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:46,841 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:46,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1778791393, now seen corresponding path program 41 times [2018-09-30 23:48:46,842 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:46,842 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:46,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:46,842 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:46,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:46,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:48,871 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:48,871 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:48,871 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:48:48,878 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:48:48,903 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-30 23:48:48,903 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:48,906 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:48,917 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:48,936 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:48,937 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-30 23:48:48,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-30 23:48:48,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-30 23:48:48,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 23:48:48,938 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 44 states. [2018-09-30 23:48:50,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:50,059 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-09-30 23:48:50,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-30 23:48:50,060 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 43 [2018-09-30 23:48:50,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:50,060 INFO L225 Difference]: With dead ends: 46 [2018-09-30 23:48:50,060 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 23:48:50,062 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 23:48:50,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 23:48:50,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-30 23:48:50,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-30 23:48:50,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-30 23:48:50,064 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-09-30 23:48:50,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:50,065 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-30 23:48:50,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-30 23:48:50,065 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-30 23:48:50,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-30 23:48:50,065 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:50,065 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1] [2018-09-30 23:48:50,065 INFO L423 AbstractCegarLoop]: === Iteration 43 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:50,066 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:50,066 INFO L82 PathProgramCache]: Analyzing trace with hash -692041721, now seen corresponding path program 42 times [2018-09-30 23:48:50,066 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:50,066 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:50,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:50,067 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:50,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:50,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:51,059 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:51,060 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:51,060 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:48:51,068 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:48:51,088 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-09-30 23:48:51,088 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:51,090 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:51,101 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:51,122 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:51,123 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-30 23:48:51,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-30 23:48:51,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-30 23:48:51,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 23:48:51,124 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 45 states. [2018-09-30 23:48:52,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:52,458 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-30 23:48:52,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-30 23:48:52,458 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 44 [2018-09-30 23:48:52,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:52,458 INFO L225 Difference]: With dead ends: 47 [2018-09-30 23:48:52,458 INFO L226 Difference]: Without dead ends: 46 [2018-09-30 23:48:52,459 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 23:48:52,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-30 23:48:52,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-30 23:48:52,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-30 23:48:52,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-09-30 23:48:52,462 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-09-30 23:48:52,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:52,462 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-09-30 23:48:52,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-30 23:48:52,462 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-09-30 23:48:52,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-30 23:48:52,463 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:52,463 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1] [2018-09-30 23:48:52,463 INFO L423 AbstractCegarLoop]: === Iteration 44 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:52,463 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:52,463 INFO L82 PathProgramCache]: Analyzing trace with hash 21543073, now seen corresponding path program 43 times [2018-09-30 23:48:52,463 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:52,463 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:52,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:52,464 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:52,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:52,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:53,833 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:53,834 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:53,834 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:48:53,842 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:48:53,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:53,858 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:53,869 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:53,890 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:53,891 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-30 23:48:53,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-30 23:48:53,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-30 23:48:53,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 23:48:53,892 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 46 states. [2018-09-30 23:48:55,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:55,116 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-09-30 23:48:55,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-30 23:48:55,116 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 45 [2018-09-30 23:48:55,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:55,117 INFO L225 Difference]: With dead ends: 48 [2018-09-30 23:48:55,117 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 23:48:55,118 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 23:48:55,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 23:48:55,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-30 23:48:55,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-30 23:48:55,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-30 23:48:55,122 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-09-30 23:48:55,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:55,122 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-30 23:48:55,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-30 23:48:55,122 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-30 23:48:55,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-30 23:48:55,123 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:55,123 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1] [2018-09-30 23:48:55,123 INFO L423 AbstractCegarLoop]: === Iteration 45 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:55,123 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:55,124 INFO L82 PathProgramCache]: Analyzing trace with hash 667835207, now seen corresponding path program 44 times [2018-09-30 23:48:55,124 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:55,124 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:55,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:55,124 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:48:55,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:55,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:56,158 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:56,159 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:56,159 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:48:56,167 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:48:56,191 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:48:56,192 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:56,194 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:56,203 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:56,223 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:56,224 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-30 23:48:56,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-30 23:48:56,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-30 23:48:56,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 23:48:56,224 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 47 states. [2018-09-30 23:48:57,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:57,682 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-30 23:48:57,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 23:48:57,682 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 46 [2018-09-30 23:48:57,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:57,683 INFO L225 Difference]: With dead ends: 49 [2018-09-30 23:48:57,683 INFO L226 Difference]: Without dead ends: 48 [2018-09-30 23:48:57,684 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 23:48:57,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-30 23:48:57,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-09-30 23:48:57,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-30 23:48:57,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-09-30 23:48:57,687 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-09-30 23:48:57,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:57,687 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-09-30 23:48:57,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-30 23:48:57,687 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-09-30 23:48:57,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-30 23:48:57,688 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:57,688 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1] [2018-09-30 23:48:57,688 INFO L423 AbstractCegarLoop]: === Iteration 46 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:57,688 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:57,688 INFO L82 PathProgramCache]: Analyzing trace with hash -771945119, now seen corresponding path program 45 times [2018-09-30 23:48:57,688 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:57,688 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:57,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:57,689 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:57,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:57,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:58,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:58,831 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:58,831 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:48:58,839 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:48:58,863 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-30 23:48:58,863 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:58,865 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:58,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:58,917 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:58,917 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-30 23:48:58,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-30 23:48:58,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-30 23:48:58,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 23:48:58,918 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 48 states. [2018-09-30 23:49:00,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:49:00,263 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-09-30 23:49:00,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-30 23:49:00,264 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 47 [2018-09-30 23:49:00,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:49:00,264 INFO L225 Difference]: With dead ends: 50 [2018-09-30 23:49:00,264 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 23:49:00,265 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 23:49:00,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 23:49:00,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-30 23:49:00,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-30 23:49:00,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-30 23:49:00,269 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-09-30 23:49:00,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:49:00,269 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-30 23:49:00,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-30 23:49:00,269 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-30 23:49:00,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-30 23:49:00,269 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:49:00,269 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1] [2018-09-30 23:49:00,270 INFO L423 AbstractCegarLoop]: === Iteration 47 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:49:00,270 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:49:00,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1839505031, now seen corresponding path program 46 times [2018-09-30 23:49:00,270 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:49:00,270 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:49:00,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:00,271 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:49:00,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:00,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:49:01,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:01,409 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:49:01,409 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:49:01,418 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:49:01,431 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:49:01,431 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:49:01,433 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:49:01,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:01,464 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:49:01,464 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-30 23:49:01,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-30 23:49:01,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-30 23:49:01,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 23:49:01,465 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 49 states. [2018-09-30 23:49:02,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:49:02,990 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-30 23:49:02,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 23:49:02,991 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 48 [2018-09-30 23:49:02,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:49:02,992 INFO L225 Difference]: With dead ends: 51 [2018-09-30 23:49:02,992 INFO L226 Difference]: Without dead ends: 50 [2018-09-30 23:49:02,992 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 23:49:02,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-30 23:49:02,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-30 23:49:02,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-30 23:49:02,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-09-30 23:49:02,996 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-09-30 23:49:02,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:49:02,996 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-09-30 23:49:02,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-30 23:49:02,996 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-09-30 23:49:02,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-30 23:49:02,997 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:49:02,997 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1] [2018-09-30 23:49:02,997 INFO L423 AbstractCegarLoop]: === Iteration 48 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:49:02,997 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:49:02,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1190081057, now seen corresponding path program 47 times [2018-09-30 23:49:02,997 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:49:02,998 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:49:02,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:02,998 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:49:02,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:03,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:49:04,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:04,148 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:49:04,148 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:49:04,156 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:49:04,179 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-30 23:49:04,179 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:49:04,182 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:49:04,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:04,225 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:49:04,225 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-30 23:49:04,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-30 23:49:04,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-30 23:49:04,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 23:49:04,226 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 50 states. [2018-09-30 23:49:05,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:49:05,753 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-09-30 23:49:05,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-30 23:49:05,754 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 49 [2018-09-30 23:49:05,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:49:05,755 INFO L225 Difference]: With dead ends: 52 [2018-09-30 23:49:05,755 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 23:49:05,756 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 23:49:05,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 23:49:05,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-30 23:49:05,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-30 23:49:05,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-30 23:49:05,759 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-09-30 23:49:05,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:49:05,759 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-30 23:49:05,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-30 23:49:05,759 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-30 23:49:05,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-30 23:49:05,760 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:49:05,760 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1] [2018-09-30 23:49:05,760 INFO L423 AbstractCegarLoop]: === Iteration 49 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:49:05,760 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:49:05,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1762192953, now seen corresponding path program 48 times [2018-09-30 23:49:05,760 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:49:05,761 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:49:05,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:05,761 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:49:05,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:05,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:49:07,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:07,335 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:49:07,335 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:49:07,342 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:49:07,368 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-30 23:49:07,369 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:49:07,371 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:49:07,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:07,402 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:49:07,402 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-30 23:49:07,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-30 23:49:07,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-30 23:49:07,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 23:49:07,403 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 51 states. [2018-09-30 23:49:09,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:49:09,050 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-30 23:49:09,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 23:49:09,050 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 50 [2018-09-30 23:49:09,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:49:09,051 INFO L225 Difference]: With dead ends: 53 [2018-09-30 23:49:09,051 INFO L226 Difference]: Without dead ends: 52 [2018-09-30 23:49:09,052 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 23:49:09,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-30 23:49:09,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-30 23:49:09,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-30 23:49:09,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-09-30 23:49:09,056 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-09-30 23:49:09,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:49:09,056 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-09-30 23:49:09,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-30 23:49:09,057 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-09-30 23:49:09,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-30 23:49:09,057 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:49:09,057 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1] [2018-09-30 23:49:09,057 INFO L423 AbstractCegarLoop]: === Iteration 50 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:49:09,058 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:49:09,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1206593249, now seen corresponding path program 49 times [2018-09-30 23:49:09,058 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:49:09,058 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:49:09,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:09,059 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:49:09,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:09,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:49:10,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:10,315 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:49:10,315 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:49:10,323 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:49:10,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:49:10,341 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:49:10,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:10,406 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:49:10,407 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-30 23:49:10,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-30 23:49:10,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-30 23:49:10,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 23:49:10,408 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 52 states. [2018-09-30 23:49:11,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:49:11,987 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-09-30 23:49:11,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-30 23:49:11,988 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 51 [2018-09-30 23:49:11,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:49:11,989 INFO L225 Difference]: With dead ends: 54 [2018-09-30 23:49:11,989 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 23:49:11,990 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 23:49:11,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 23:49:11,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-30 23:49:11,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-30 23:49:11,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-30 23:49:11,993 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-09-30 23:49:11,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:49:11,994 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-30 23:49:11,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-30 23:49:11,994 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-30 23:49:11,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-30 23:49:11,994 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:49:11,994 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1] [2018-09-30 23:49:11,995 INFO L423 AbstractCegarLoop]: === Iteration 51 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:49:11,995 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:49:11,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1250315001, now seen corresponding path program 50 times [2018-09-30 23:49:11,995 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:49:11,995 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:49:11,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:11,996 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:49:11,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:12,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:49:13,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:13,842 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:49:13,843 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:49:13,851 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:49:13,867 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:49:13,868 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:49:13,870 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:49:13,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:13,901 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:49:13,902 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-30 23:49:13,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-30 23:49:13,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-30 23:49:13,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 23:49:13,903 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 53 states. [2018-09-30 23:49:15,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:49:15,569 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-30 23:49:15,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-30 23:49:15,570 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 52 [2018-09-30 23:49:15,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:49:15,571 INFO L225 Difference]: With dead ends: 55 [2018-09-30 23:49:15,571 INFO L226 Difference]: Without dead ends: 54 [2018-09-30 23:49:15,572 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 23:49:15,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-30 23:49:15,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-09-30 23:49:15,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-30 23:49:15,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-09-30 23:49:15,575 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-09-30 23:49:15,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:49:15,575 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-09-30 23:49:15,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-30 23:49:15,575 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-09-30 23:49:15,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-30 23:49:15,576 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:49:15,576 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1] [2018-09-30 23:49:15,576 INFO L423 AbstractCegarLoop]: === Iteration 52 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:49:15,576 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:49:15,577 INFO L82 PathProgramCache]: Analyzing trace with hash -105059423, now seen corresponding path program 51 times [2018-09-30 23:49:15,577 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:49:15,577 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:49:15,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:15,577 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:49:15,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:15,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:49:17,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:17,034 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:49:17,034 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:49:17,041 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:49:17,067 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-09-30 23:49:17,067 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:49:17,069 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:49:17,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:17,101 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:49:17,102 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-30 23:49:17,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-30 23:49:17,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-30 23:49:17,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 23:49:17,103 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 54 states. [2018-09-30 23:49:18,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:49:18,971 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-09-30 23:49:18,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-30 23:49:18,972 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 53 [2018-09-30 23:49:18,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:49:18,973 INFO L225 Difference]: With dead ends: 56 [2018-09-30 23:49:18,973 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 23:49:18,973 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 23:49:18,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 23:49:18,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-30 23:49:18,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-30 23:49:18,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-30 23:49:18,977 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-09-30 23:49:18,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:49:18,977 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-30 23:49:18,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-30 23:49:18,977 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-30 23:49:18,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-30 23:49:18,978 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:49:18,978 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1] [2018-09-30 23:49:18,978 INFO L423 AbstractCegarLoop]: === Iteration 53 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:49:18,978 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:49:18,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1038125127, now seen corresponding path program 52 times [2018-09-30 23:49:18,978 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:49:18,979 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:49:18,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:18,979 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:49:18,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:18,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:49:20,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:20,424 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:49:20,424 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:49:20,431 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:49:20,449 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:49:20,449 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:49:20,451 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:49:20,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:20,483 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:49:20,483 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-30 23:49:20,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-30 23:49:20,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-30 23:49:20,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 23:49:20,484 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 55 states. [2018-09-30 23:49:22,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:49:22,252 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-30 23:49:22,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 23:49:22,253 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 54 [2018-09-30 23:49:22,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:49:22,253 INFO L225 Difference]: With dead ends: 57 [2018-09-30 23:49:22,253 INFO L226 Difference]: Without dead ends: 56 [2018-09-30 23:49:22,255 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 23:49:22,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-30 23:49:22,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-30 23:49:22,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-30 23:49:22,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-09-30 23:49:22,259 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-09-30 23:49:22,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:49:22,259 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-09-30 23:49:22,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-30 23:49:22,260 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-09-30 23:49:22,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-30 23:49:22,260 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:49:22,260 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1] [2018-09-30 23:49:22,260 INFO L423 AbstractCegarLoop]: === Iteration 54 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:49:22,260 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:49:22,261 INFO L82 PathProgramCache]: Analyzing trace with hash 2117107809, now seen corresponding path program 53 times [2018-09-30 23:49:22,261 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:49:22,261 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:49:22,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:22,262 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:49:22,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:22,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:49:24,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:24,025 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:49:24,025 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:49:24,033 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:49:24,063 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-09-30 23:49:24,064 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:49:24,066 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:49:24,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:24,099 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:49:24,099 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-30 23:49:24,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-30 23:49:24,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-30 23:49:24,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 23:49:24,100 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 56 states. [2018-09-30 23:49:25,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:49:25,927 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-09-30 23:49:25,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-30 23:49:25,927 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 55 [2018-09-30 23:49:25,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:49:25,928 INFO L225 Difference]: With dead ends: 58 [2018-09-30 23:49:25,928 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 23:49:25,929 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 23:49:25,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 23:49:25,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-30 23:49:25,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-30 23:49:25,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-09-30 23:49:25,932 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-09-30 23:49:25,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:49:25,932 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-09-30 23:49:25,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-30 23:49:25,933 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-09-30 23:49:25,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-30 23:49:25,933 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:49:25,933 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1] [2018-09-30 23:49:25,933 INFO L423 AbstractCegarLoop]: === Iteration 55 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:49:25,933 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:49:25,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1205832583, now seen corresponding path program 54 times [2018-09-30 23:49:25,934 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:49:25,934 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:49:25,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:25,934 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:49:25,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:25,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:49:27,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:27,466 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:49:27,466 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:49:27,473 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:49:27,501 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-09-30 23:49:27,501 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:49:27,504 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:49:27,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:27,535 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:49:27,535 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-30 23:49:27,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-30 23:49:27,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-30 23:49:27,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2018-09-30 23:49:27,536 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 57 states. [2018-09-30 23:49:29,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:49:29,561 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-30 23:49:29,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-30 23:49:29,561 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 56 [2018-09-30 23:49:29,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:49:29,562 INFO L225 Difference]: With dead ends: 59 [2018-09-30 23:49:29,562 INFO L226 Difference]: Without dead ends: 58 [2018-09-30 23:49:29,563 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2018-09-30 23:49:29,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-30 23:49:29,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-30 23:49:29,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-30 23:49:29,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-09-30 23:49:29,567 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-09-30 23:49:29,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:49:29,567 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-09-30 23:49:29,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-30 23:49:29,567 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-09-30 23:49:29,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-30 23:49:29,567 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:49:29,568 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1] [2018-09-30 23:49:29,568 INFO L423 AbstractCegarLoop]: === Iteration 56 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:49:29,568 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:49:29,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1273895647, now seen corresponding path program 55 times [2018-09-30 23:49:29,568 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:49:29,568 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:49:29,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:29,569 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:49:29,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:29,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:49:31,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:31,563 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:49:31,563 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:49:31,571 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:49:31,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:49:31,590 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:49:31,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:31,622 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:49:31,622 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-30 23:49:31,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-30 23:49:31,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-30 23:49:31,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 23:49:31,623 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 58 states. [2018-09-30 23:49:33,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:49:33,750 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-09-30 23:49:33,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-30 23:49:33,751 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 57 [2018-09-30 23:49:33,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:49:33,751 INFO L225 Difference]: With dead ends: 60 [2018-09-30 23:49:33,752 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 23:49:33,752 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 23:49:33,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 23:49:33,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-30 23:49:33,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-30 23:49:33,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-30 23:49:33,756 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-09-30 23:49:33,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:49:33,756 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-30 23:49:33,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-30 23:49:33,756 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-30 23:49:33,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-30 23:49:33,757 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:49:33,757 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1] [2018-09-30 23:49:33,757 INFO L423 AbstractCegarLoop]: === Iteration 57 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:49:33,757 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:49:33,757 INFO L82 PathProgramCache]: Analyzing trace with hash -836059449, now seen corresponding path program 56 times [2018-09-30 23:49:33,757 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:49:33,757 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:49:33,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:33,758 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:49:33,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:33,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:49:35,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:35,313 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:49:35,313 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:49:35,321 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:49:35,338 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:49:35,338 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:49:35,341 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:49:35,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:35,374 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:49:35,374 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-30 23:49:35,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-30 23:49:35,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-30 23:49:35,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 23:49:35,375 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 59 states. [2018-09-30 23:49:37,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:49:37,434 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-30 23:49:37,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-30 23:49:37,435 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 58 [2018-09-30 23:49:37,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:49:37,436 INFO L225 Difference]: With dead ends: 61 [2018-09-30 23:49:37,436 INFO L226 Difference]: Without dead ends: 60 [2018-09-30 23:49:37,437 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 23:49:37,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-09-30 23:49:37,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-09-30 23:49:37,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-30 23:49:37,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-09-30 23:49:37,440 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-09-30 23:49:37,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:49:37,440 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-09-30 23:49:37,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-30 23:49:37,441 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-09-30 23:49:37,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-30 23:49:37,441 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:49:37,441 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1] [2018-09-30 23:49:37,442 INFO L423 AbstractCegarLoop]: === Iteration 58 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:49:37,442 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:49:37,442 INFO L82 PathProgramCache]: Analyzing trace with hash -148039199, now seen corresponding path program 57 times [2018-09-30 23:49:37,442 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:49:37,442 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:49:37,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:37,443 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:49:37,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:37,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:49:39,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:39,790 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:49:39,791 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:49:39,798 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:49:39,833 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-09-30 23:49:39,833 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:49:39,836 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:49:39,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:39,869 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:49:39,870 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-30 23:49:39,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-30 23:49:39,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-30 23:49:39,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=3423, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 23:49:39,871 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 60 states. [2018-09-30 23:49:42,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:49:42,024 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-09-30 23:49:42,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-30 23:49:42,024 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 59 [2018-09-30 23:49:42,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:49:42,025 INFO L225 Difference]: With dead ends: 62 [2018-09-30 23:49:42,025 INFO L226 Difference]: Without dead ends: 61 [2018-09-30 23:49:42,026 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=117, Invalid=3423, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 23:49:42,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-30 23:49:42,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-30 23:49:42,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-30 23:49:42,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-09-30 23:49:42,031 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-09-30 23:49:42,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:49:42,031 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-09-30 23:49:42,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-30 23:49:42,031 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-09-30 23:49:42,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-30 23:49:42,032 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:49:42,032 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1] [2018-09-30 23:49:42,032 INFO L423 AbstractCegarLoop]: === Iteration 59 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:49:42,032 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:49:42,032 INFO L82 PathProgramCache]: Analyzing trace with hash -294247929, now seen corresponding path program 58 times [2018-09-30 23:49:42,032 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:49:42,032 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:49:42,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:42,033 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:49:42,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:42,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:49:44,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:44,494 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:49:44,494 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:49:44,504 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:49:44,517 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:49:44,518 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:49:44,520 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:49:44,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:44,553 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:49:44,554 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-30 23:49:44,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-30 23:49:44,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-30 23:49:44,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=3541, Unknown=0, NotChecked=0, Total=3660 [2018-09-30 23:49:44,554 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 61 states. [2018-09-30 23:49:46,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:49:46,740 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-30 23:49:46,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-30 23:49:46,741 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 60 [2018-09-30 23:49:46,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:49:46,741 INFO L225 Difference]: With dead ends: 63 [2018-09-30 23:49:46,741 INFO L226 Difference]: Without dead ends: 62 [2018-09-30 23:49:46,742 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=119, Invalid=3541, Unknown=0, NotChecked=0, Total=3660 [2018-09-30 23:49:46,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-09-30 23:49:46,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-09-30 23:49:46,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-09-30 23:49:46,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-09-30 23:49:46,746 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-09-30 23:49:46,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:49:46,746 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-09-30 23:49:46,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-30 23:49:46,747 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-09-30 23:49:46,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-09-30 23:49:46,747 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:49:46,747 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1] [2018-09-30 23:49:46,747 INFO L423 AbstractCegarLoop]: === Iteration 60 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:49:46,747 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:49:46,747 INFO L82 PathProgramCache]: Analyzing trace with hash -531751263, now seen corresponding path program 59 times [2018-09-30 23:49:46,747 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:49:46,748 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:49:46,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:46,748 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:49:46,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:46,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:49:48,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:48,702 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:49:48,702 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:49:48,709 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:49:48,768 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-09-30 23:49:48,769 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:49:48,771 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:49:48,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:48,810 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:49:48,810 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-30 23:49:48,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-30 23:49:48,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-30 23:49:48,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=3661, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 23:49:48,811 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 62 states. [2018-09-30 23:49:51,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:49:51,090 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-09-30 23:49:51,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-30 23:49:51,090 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 61 [2018-09-30 23:49:51,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:49:51,091 INFO L225 Difference]: With dead ends: 64 [2018-09-30 23:49:51,091 INFO L226 Difference]: Without dead ends: 63 [2018-09-30 23:49:51,092 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=121, Invalid=3661, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 23:49:51,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-30 23:49:51,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-30 23:49:51,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-30 23:49:51,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-09-30 23:49:51,095 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-09-30 23:49:51,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:49:51,095 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-09-30 23:49:51,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-30 23:49:51,096 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-09-30 23:49:51,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-30 23:49:51,096 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:49:51,096 INFO L375 BasicCegarLoop]: trace histogram [60, 1, 1] [2018-09-30 23:49:51,096 INFO L423 AbstractCegarLoop]: === Iteration 61 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:49:51,096 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:49:51,096 INFO L82 PathProgramCache]: Analyzing trace with hash 695579975, now seen corresponding path program 60 times [2018-09-30 23:49:51,097 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:49:51,097 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:49:51,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:51,097 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:49:51,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:51,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:49:53,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:53,121 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:49:53,121 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:49:53,129 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:49:53,165 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-30 23:49:53,165 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:49:53,167 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:49:53,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:53,214 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:49:53,214 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-30 23:49:53,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-30 23:49:53,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-30 23:49:53,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2018-09-30 23:49:53,215 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 63 states. [2018-09-30 23:49:56,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:49:56,002 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-30 23:49:56,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-30 23:49:56,003 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 62 [2018-09-30 23:49:56,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:49:56,004 INFO L225 Difference]: With dead ends: 65 [2018-09-30 23:49:56,004 INFO L226 Difference]: Without dead ends: 64 [2018-09-30 23:49:56,004 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2018-09-30 23:49:56,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-30 23:49:56,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-09-30 23:49:56,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-30 23:49:56,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-09-30 23:49:56,009 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-09-30 23:49:56,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:49:56,009 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-09-30 23:49:56,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-30 23:49:56,009 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-09-30 23:49:56,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-30 23:49:56,010 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:49:56,010 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1] [2018-09-30 23:49:56,010 INFO L423 AbstractCegarLoop]: === Iteration 62 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:49:56,010 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:49:56,010 INFO L82 PathProgramCache]: Analyzing trace with hash 88142689, now seen corresponding path program 61 times [2018-09-30 23:49:56,011 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:49:56,011 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:49:56,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:56,011 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:49:56,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:56,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:49:57,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:57,982 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:49:57,982 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:49:57,990 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:49:58,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:49:58,011 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:49:58,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:58,044 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:49:58,044 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-09-30 23:49:58,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-30 23:49:58,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-30 23:49:58,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=3907, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 23:49:58,045 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 64 states. [2018-09-30 23:50:00,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:50:00,615 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-09-30 23:50:00,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-30 23:50:00,615 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 63 [2018-09-30 23:50:00,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:50:00,616 INFO L225 Difference]: With dead ends: 66 [2018-09-30 23:50:00,616 INFO L226 Difference]: Without dead ends: 65 [2018-09-30 23:50:00,617 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=125, Invalid=3907, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 23:50:00,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-30 23:50:00,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-30 23:50:00,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-30 23:50:00,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-09-30 23:50:00,620 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-09-30 23:50:00,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:50:00,621 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-09-30 23:50:00,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-30 23:50:00,621 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-09-30 23:50:00,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-30 23:50:00,621 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:50:00,622 INFO L375 BasicCegarLoop]: trace histogram [62, 1, 1] [2018-09-30 23:50:00,622 INFO L423 AbstractCegarLoop]: === Iteration 63 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:50:00,622 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:50:00,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1562543993, now seen corresponding path program 62 times [2018-09-30 23:50:00,622 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:50:00,622 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:50:00,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:00,623 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:50:00,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:00,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:50:02,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:02,547 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:50:02,547 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:50:02,556 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:50:02,575 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:50:02,575 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:50:02,579 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:50:02,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:02,624 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:50:02,625 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-30 23:50:02,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-30 23:50:02,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-30 23:50:02,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=4033, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 23:50:02,626 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 65 states. [2018-09-30 23:50:05,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:50:05,440 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-30 23:50:05,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-30 23:50:05,440 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 64 [2018-09-30 23:50:05,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:50:05,441 INFO L225 Difference]: With dead ends: 67 [2018-09-30 23:50:05,441 INFO L226 Difference]: Without dead ends: 66 [2018-09-30 23:50:05,442 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=127, Invalid=4033, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 23:50:05,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-30 23:50:05,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-09-30 23:50:05,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-30 23:50:05,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-09-30 23:50:05,446 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-09-30 23:50:05,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:50:05,446 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-09-30 23:50:05,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-30 23:50:05,446 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-09-30 23:50:05,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-30 23:50:05,447 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:50:05,447 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1] [2018-09-30 23:50:05,447 INFO L423 AbstractCegarLoop]: === Iteration 64 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:50:05,447 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:50:05,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1194223583, now seen corresponding path program 63 times [2018-09-30 23:50:05,448 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:50:05,448 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:50:05,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:05,448 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:50:05,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:05,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:50:07,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:07,491 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:50:07,491 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:50:07,499 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:50:07,539 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-09-30 23:50:07,539 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:50:07,542 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:50:07,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:07,576 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:50:07,576 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-30 23:50:07,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-30 23:50:07,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-30 23:50:07,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=4161, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 23:50:07,577 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 66 states. [2018-09-30 23:50:10,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:50:10,314 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-09-30 23:50:10,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-30 23:50:10,314 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 65 [2018-09-30 23:50:10,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:50:10,315 INFO L225 Difference]: With dead ends: 68 [2018-09-30 23:50:10,315 INFO L226 Difference]: Without dead ends: 67 [2018-09-30 23:50:10,316 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=129, Invalid=4161, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 23:50:10,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-30 23:50:10,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-30 23:50:10,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-30 23:50:10,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-09-30 23:50:10,320 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-09-30 23:50:10,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:50:10,320 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-09-30 23:50:10,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-30 23:50:10,321 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-09-30 23:50:10,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-30 23:50:10,321 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:50:10,321 INFO L375 BasicCegarLoop]: trace histogram [64, 1, 1] [2018-09-30 23:50:10,321 INFO L423 AbstractCegarLoop]: === Iteration 65 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:50:10,322 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:50:10,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1633774535, now seen corresponding path program 64 times [2018-09-30 23:50:10,322 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:50:10,322 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:50:10,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:10,323 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:50:10,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:10,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:50:12,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:12,433 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:50:12,433 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:50:12,443 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:50:12,460 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:50:12,460 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:50:12,464 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:50:12,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:12,508 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:50:12,509 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-30 23:50:12,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-30 23:50:12,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-30 23:50:12,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2018-09-30 23:50:12,510 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 67 states. [2018-09-30 23:50:15,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:50:15,363 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-30 23:50:15,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-30 23:50:15,363 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 66 [2018-09-30 23:50:15,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:50:15,364 INFO L225 Difference]: With dead ends: 69 [2018-09-30 23:50:15,364 INFO L226 Difference]: Without dead ends: 68 [2018-09-30 23:50:15,365 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2018-09-30 23:50:15,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-30 23:50:15,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-09-30 23:50:15,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-30 23:50:15,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-09-30 23:50:15,369 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-09-30 23:50:15,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:50:15,369 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-09-30 23:50:15,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-30 23:50:15,369 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-09-30 23:50:15,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-09-30 23:50:15,370 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:50:15,370 INFO L375 BasicCegarLoop]: trace histogram [65, 1, 1] [2018-09-30 23:50:15,370 INFO L423 AbstractCegarLoop]: === Iteration 66 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:50:15,370 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:50:15,370 INFO L82 PathProgramCache]: Analyzing trace with hash -892597023, now seen corresponding path program 65 times [2018-09-30 23:50:15,370 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:50:15,371 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:50:15,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:15,371 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:50:15,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:15,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:50:17,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:17,446 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:50:17,446 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:50:17,454 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:50:17,487 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-09-30 23:50:17,487 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:50:17,490 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:50:17,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:17,528 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:50:17,528 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-30 23:50:17,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-30 23:50:17,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-30 23:50:17,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=4423, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 23:50:17,529 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 68 states. [2018-09-30 23:50:20,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:50:20,448 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-09-30 23:50:20,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-30 23:50:20,449 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 67 [2018-09-30 23:50:20,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:50:20,450 INFO L225 Difference]: With dead ends: 70 [2018-09-30 23:50:20,450 INFO L226 Difference]: Without dead ends: 69 [2018-09-30 23:50:20,451 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=133, Invalid=4423, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 23:50:20,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-30 23:50:20,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-30 23:50:20,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-30 23:50:20,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-09-30 23:50:20,456 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-09-30 23:50:20,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:50:20,456 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-09-30 23:50:20,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-30 23:50:20,456 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-09-30 23:50:20,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-30 23:50:20,457 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:50:20,457 INFO L375 BasicCegarLoop]: trace histogram [66, 1, 1] [2018-09-30 23:50:20,457 INFO L423 AbstractCegarLoop]: === Iteration 67 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:50:20,457 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:50:20,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1900703993, now seen corresponding path program 66 times [2018-09-30 23:50:20,457 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:50:20,458 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:50:20,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:20,458 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:50:20,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:20,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:50:22,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:22,739 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:50:22,739 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:50:22,747 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:50:22,796 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-09-30 23:50:22,797 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:50:22,800 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:50:22,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:22,835 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:50:22,836 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-30 23:50:22,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-30 23:50:22,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-30 23:50:22,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=4557, Unknown=0, NotChecked=0, Total=4692 [2018-09-30 23:50:22,837 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 69 states. [2018-09-30 23:50:25,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:50:25,817 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-30 23:50:25,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-30 23:50:25,818 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 68 [2018-09-30 23:50:25,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:50:25,819 INFO L225 Difference]: With dead ends: 71 [2018-09-30 23:50:25,819 INFO L226 Difference]: Without dead ends: 70 [2018-09-30 23:50:25,819 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=135, Invalid=4557, Unknown=0, NotChecked=0, Total=4692 [2018-09-30 23:50:25,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-30 23:50:25,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-09-30 23:50:25,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-30 23:50:25,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-09-30 23:50:25,823 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-09-30 23:50:25,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:50:25,824 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-09-30 23:50:25,824 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-30 23:50:25,824 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-09-30 23:50:25,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-09-30 23:50:25,824 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:50:25,824 INFO L375 BasicCegarLoop]: trace histogram [67, 1, 1] [2018-09-30 23:50:25,825 INFO L423 AbstractCegarLoop]: === Iteration 68 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:50:25,825 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:50:25,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1207718305, now seen corresponding path program 67 times [2018-09-30 23:50:25,825 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:50:25,825 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:50:25,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:25,826 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:50:25,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:25,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:50:28,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:28,064 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:50:28,064 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:50:28,072 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:50:28,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:50:28,093 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:50:28,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:28,127 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:50:28,127 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-09-30 23:50:28,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-30 23:50:28,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-30 23:50:28,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=4693, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 23:50:28,128 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 70 states. [2018-09-30 23:50:31,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:50:31,204 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-09-30 23:50:31,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-30 23:50:31,205 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 69 [2018-09-30 23:50:31,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:50:31,206 INFO L225 Difference]: With dead ends: 72 [2018-09-30 23:50:31,206 INFO L226 Difference]: Without dead ends: 71 [2018-09-30 23:50:31,206 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=137, Invalid=4693, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 23:50:31,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-30 23:50:31,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-30 23:50:31,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-30 23:50:31,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-09-30 23:50:31,210 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-09-30 23:50:31,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:50:31,210 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-09-30 23:50:31,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-30 23:50:31,211 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-09-30 23:50:31,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-30 23:50:31,211 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:50:31,211 INFO L375 BasicCegarLoop]: trace histogram [68, 1, 1] [2018-09-30 23:50:31,211 INFO L423 AbstractCegarLoop]: === Iteration 69 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:50:31,211 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:50:31,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1215438265, now seen corresponding path program 68 times [2018-09-30 23:50:31,212 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:50:31,212 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:50:31,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:31,212 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:50:31,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:31,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:50:33,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:33,514 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:50:33,514 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:50:33,520 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:50:33,543 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:50:33,544 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:50:33,546 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:50:33,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:33,581 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:50:33,581 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-30 23:50:33,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-30 23:50:33,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-30 23:50:33,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4831, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 23:50:33,582 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 71 states. [2018-09-30 23:50:36,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:50:36,731 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-30 23:50:36,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-30 23:50:36,732 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 70 [2018-09-30 23:50:36,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:50:36,732 INFO L225 Difference]: With dead ends: 73 [2018-09-30 23:50:36,733 INFO L226 Difference]: Without dead ends: 72 [2018-09-30 23:50:36,733 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=139, Invalid=4831, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 23:50:36,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-09-30 23:50:36,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-09-30 23:50:36,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-09-30 23:50:36,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-09-30 23:50:36,737 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-09-30 23:50:36,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:50:36,737 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-09-30 23:50:36,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-30 23:50:36,737 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-09-30 23:50:36,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-09-30 23:50:36,737 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:50:36,738 INFO L375 BasicCegarLoop]: trace histogram [69, 1, 1] [2018-09-30 23:50:36,739 INFO L423 AbstractCegarLoop]: === Iteration 70 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:50:36,739 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:50:36,740 INFO L82 PathProgramCache]: Analyzing trace with hash 976119393, now seen corresponding path program 69 times [2018-09-30 23:50:36,740 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:50:36,740 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:50:36,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:36,740 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:50:36,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:36,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:50:39,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:39,105 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:50:39,106 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:50:39,112 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:50:39,150 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-09-30 23:50:39,151 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:50:39,154 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:50:39,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:39,189 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:50:39,190 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-30 23:50:39,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-30 23:50:39,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-30 23:50:39,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=4971, Unknown=0, NotChecked=0, Total=5112 [2018-09-30 23:50:39,190 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 72 states. [2018-09-30 23:50:42,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:50:42,445 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-09-30 23:50:42,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-30 23:50:42,445 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 71 [2018-09-30 23:50:42,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:50:42,446 INFO L225 Difference]: With dead ends: 74 [2018-09-30 23:50:42,447 INFO L226 Difference]: Without dead ends: 73 [2018-09-30 23:50:42,447 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=141, Invalid=4971, Unknown=0, NotChecked=0, Total=5112 [2018-09-30 23:50:42,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-30 23:50:42,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-30 23:50:42,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-30 23:50:42,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-09-30 23:50:42,452 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2018-09-30 23:50:42,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:50:42,452 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-09-30 23:50:42,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-30 23:50:42,452 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-09-30 23:50:42,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-30 23:50:42,453 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:50:42,453 INFO L375 BasicCegarLoop]: trace histogram [70, 1, 1] [2018-09-30 23:50:42,453 INFO L423 AbstractCegarLoop]: === Iteration 71 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:50:42,453 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:50:42,453 INFO L82 PathProgramCache]: Analyzing trace with hash 194930055, now seen corresponding path program 70 times [2018-09-30 23:50:42,453 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:50:42,453 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:50:42,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:42,454 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:50:42,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:42,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:50:45,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:45,065 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:50:45,065 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:50:45,072 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:50:45,095 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:50:45,096 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:50:45,099 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:50:45,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:45,134 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:50:45,134 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-30 23:50:45,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-30 23:50:45,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-30 23:50:45,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=5113, Unknown=0, NotChecked=0, Total=5256 [2018-09-30 23:50:45,135 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 73 states. [2018-09-30 23:50:48,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:50:48,564 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-09-30 23:50:48,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-30 23:50:48,564 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 72 [2018-09-30 23:50:48,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:50:48,565 INFO L225 Difference]: With dead ends: 75 [2018-09-30 23:50:48,565 INFO L226 Difference]: Without dead ends: 74 [2018-09-30 23:50:48,566 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=143, Invalid=5113, Unknown=0, NotChecked=0, Total=5256 [2018-09-30 23:50:48,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-30 23:50:48,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-09-30 23:50:48,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-30 23:50:48,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-09-30 23:50:48,571 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2018-09-30 23:50:48,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:50:48,571 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-09-30 23:50:48,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-30 23:50:48,571 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-09-30 23:50:48,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-09-30 23:50:48,572 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:50:48,572 INFO L375 BasicCegarLoop]: trace histogram [71, 1, 1] [2018-09-30 23:50:48,572 INFO L423 AbstractCegarLoop]: === Iteration 72 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:50:48,572 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:50:48,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1747864353, now seen corresponding path program 71 times [2018-09-30 23:50:48,573 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:50:48,573 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:50:48,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:48,573 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:50:48,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:48,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:50:51,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:51,454 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:50:51,455 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:50:51,463 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:50:51,525 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-09-30 23:50:51,525 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:50:51,529 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:50:51,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:51,586 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:50:51,586 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-09-30 23:50:51,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-30 23:50:51,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-30 23:50:51,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=5257, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 23:50:51,588 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 74 states. [2018-09-30 23:50:55,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:50:55,562 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-09-30 23:50:55,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-30 23:50:55,563 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 73 [2018-09-30 23:50:55,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:50:55,564 INFO L225 Difference]: With dead ends: 76 [2018-09-30 23:50:55,564 INFO L226 Difference]: Without dead ends: 75 [2018-09-30 23:50:55,564 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=145, Invalid=5257, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 23:50:55,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-30 23:50:55,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-30 23:50:55,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-30 23:50:55,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-09-30 23:50:55,569 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2018-09-30 23:50:55,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:50:55,570 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-09-30 23:50:55,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-30 23:50:55,570 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-09-30 23:50:55,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-30 23:50:55,570 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:50:55,571 INFO L375 BasicCegarLoop]: trace histogram [72, 1, 1] [2018-09-30 23:50:55,571 INFO L423 AbstractCegarLoop]: === Iteration 73 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:50:55,571 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:50:55,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1650779961, now seen corresponding path program 72 times [2018-09-30 23:50:55,571 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:50:55,571 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:50:55,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:55,572 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:50:55,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:50:55,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:50:59,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:59,219 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:50:59,219 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:50:59,227 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:50:59,367 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-30 23:50:59,367 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:50:59,371 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:50:59,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:50:59,441 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:50:59,442 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-30 23:50:59,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-30 23:50:59,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-30 23:50:59,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=5403, Unknown=0, NotChecked=0, Total=5550 [2018-09-30 23:50:59,443 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 75 states. [2018-09-30 23:51:03,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:51:03,005 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-30 23:51:03,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-30 23:51:03,005 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 74 [2018-09-30 23:51:03,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:51:03,006 INFO L225 Difference]: With dead ends: 77 [2018-09-30 23:51:03,006 INFO L226 Difference]: Without dead ends: 76 [2018-09-30 23:51:03,007 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=147, Invalid=5403, Unknown=0, NotChecked=0, Total=5550 [2018-09-30 23:51:03,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-09-30 23:51:03,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-09-30 23:51:03,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-30 23:51:03,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-09-30 23:51:03,012 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2018-09-30 23:51:03,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:51:03,012 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-09-30 23:51:03,012 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-30 23:51:03,012 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-09-30 23:51:03,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-09-30 23:51:03,013 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:51:03,013 INFO L375 BasicCegarLoop]: trace histogram [73, 1, 1] [2018-09-30 23:51:03,013 INFO L423 AbstractCegarLoop]: === Iteration 74 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:51:03,013 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:51:03,013 INFO L82 PathProgramCache]: Analyzing trace with hash 365428705, now seen corresponding path program 73 times [2018-09-30 23:51:03,013 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:51:03,014 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:51:03,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:03,014 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:51:03,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:03,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:05,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:05,905 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:51:05,905 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:51:05,912 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:51:05,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:05,947 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:51:05,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:06,018 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:51:06,019 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-09-30 23:51:06,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-30 23:51:06,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-30 23:51:06,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=5551, Unknown=0, NotChecked=0, Total=5700 [2018-09-30 23:51:06,020 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 76 states. [2018-09-30 23:51:09,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:51:09,496 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-09-30 23:51:09,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-30 23:51:09,497 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 75 [2018-09-30 23:51:09,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:51:09,498 INFO L225 Difference]: With dead ends: 78 [2018-09-30 23:51:09,498 INFO L226 Difference]: Without dead ends: 77 [2018-09-30 23:51:09,498 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=149, Invalid=5551, Unknown=0, NotChecked=0, Total=5700 [2018-09-30 23:51:09,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-30 23:51:09,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-30 23:51:09,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-30 23:51:09,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-09-30 23:51:09,504 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2018-09-30 23:51:09,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:51:09,504 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-09-30 23:51:09,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-30 23:51:09,504 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-09-30 23:51:09,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-30 23:51:09,505 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:51:09,505 INFO L375 BasicCegarLoop]: trace histogram [74, 1, 1] [2018-09-30 23:51:09,505 INFO L423 AbstractCegarLoop]: === Iteration 75 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:51:09,505 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:51:09,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1556612089, now seen corresponding path program 74 times [2018-09-30 23:51:09,505 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:51:09,506 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:51:09,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:09,506 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:51:09,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:09,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:13,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:13,079 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:51:13,079 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:51:13,088 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:51:13,111 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:51:13,111 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:51:13,114 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:51:13,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:13,154 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:51:13,154 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-30 23:51:13,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-30 23:51:13,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-30 23:51:13,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=5701, Unknown=0, NotChecked=0, Total=5852 [2018-09-30 23:51:13,155 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 77 states. [2018-09-30 23:51:16,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:51:16,816 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-09-30 23:51:16,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-30 23:51:16,817 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 76 [2018-09-30 23:51:16,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:51:16,818 INFO L225 Difference]: With dead ends: 79 [2018-09-30 23:51:16,818 INFO L226 Difference]: Without dead ends: 78 [2018-09-30 23:51:16,818 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=151, Invalid=5701, Unknown=0, NotChecked=0, Total=5852 [2018-09-30 23:51:16,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-09-30 23:51:16,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-09-30 23:51:16,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-09-30 23:51:16,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-09-30 23:51:16,822 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2018-09-30 23:51:16,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:51:16,822 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-09-30 23:51:16,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-30 23:51:16,822 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-09-30 23:51:16,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-09-30 23:51:16,823 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:51:16,823 INFO L375 BasicCegarLoop]: trace histogram [75, 1, 1] [2018-09-30 23:51:16,823 INFO L423 AbstractCegarLoop]: === Iteration 76 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:51:16,823 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:51:16,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1010334559, now seen corresponding path program 75 times [2018-09-30 23:51:16,823 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:51:16,823 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:51:16,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:16,824 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:51:16,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:16,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:20,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:20,139 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:51:20,139 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:51:20,146 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:51:20,189 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-09-30 23:51:20,189 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:51:20,193 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:51:20,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:20,234 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:51:20,234 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-09-30 23:51:20,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-30 23:51:20,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-30 23:51:20,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=5853, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 23:51:20,235 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 78 states. [2018-09-30 23:51:24,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:51:24,004 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-09-30 23:51:24,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-30 23:51:24,005 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 77 [2018-09-30 23:51:24,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:51:24,006 INFO L225 Difference]: With dead ends: 80 [2018-09-30 23:51:24,006 INFO L226 Difference]: Without dead ends: 79 [2018-09-30 23:51:24,006 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=153, Invalid=5853, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 23:51:24,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-30 23:51:24,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-30 23:51:24,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-30 23:51:24,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-09-30 23:51:24,009 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2018-09-30 23:51:24,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:51:24,009 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-09-30 23:51:24,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-30 23:51:24,010 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-09-30 23:51:24,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-30 23:51:24,010 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:51:24,010 INFO L375 BasicCegarLoop]: trace histogram [76, 1, 1] [2018-09-30 23:51:24,010 INFO L423 AbstractCegarLoop]: === Iteration 77 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:51:24,010 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:51:24,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1255600313, now seen corresponding path program 76 times [2018-09-30 23:51:24,011 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:51:24,011 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:51:24,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:24,011 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:51:24,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:24,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:27,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:27,877 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:51:27,877 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:51:27,884 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:51:27,908 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:51:27,908 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:51:27,912 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:51:27,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:27,967 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:51:27,967 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-09-30 23:51:27,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-30 23:51:27,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-30 23:51:27,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=6007, Unknown=0, NotChecked=0, Total=6162 [2018-09-30 23:51:27,968 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 79 states. [2018-09-30 23:51:31,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:51:31,853 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-09-30 23:51:31,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-30 23:51:31,853 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 78 [2018-09-30 23:51:31,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:51:31,854 INFO L225 Difference]: With dead ends: 81 [2018-09-30 23:51:31,854 INFO L226 Difference]: Without dead ends: 80 [2018-09-30 23:51:31,855 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=155, Invalid=6007, Unknown=0, NotChecked=0, Total=6162 [2018-09-30 23:51:31,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-30 23:51:31,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-09-30 23:51:31,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-30 23:51:31,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-09-30 23:51:31,859 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2018-09-30 23:51:31,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:51:31,859 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-09-30 23:51:31,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-30 23:51:31,859 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-09-30 23:51:31,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-09-30 23:51:31,859 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:51:31,860 INFO L375 BasicCegarLoop]: trace histogram [77, 1, 1] [2018-09-30 23:51:31,860 INFO L423 AbstractCegarLoop]: === Iteration 78 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:51:31,860 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:51:31,860 INFO L82 PathProgramCache]: Analyzing trace with hash -268904095, now seen corresponding path program 77 times [2018-09-30 23:51:31,860 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:51:31,860 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:51:31,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:31,861 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:51:31,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:31,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:34,821 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:34,822 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:51:34,822 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:51:34,829 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:51:34,870 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-09-30 23:51:34,870 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:51:34,874 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:51:34,949 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:34,977 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:51:34,978 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-09-30 23:51:34,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-30 23:51:34,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-30 23:51:34,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=6163, Unknown=0, NotChecked=0, Total=6320 [2018-09-30 23:51:34,979 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 80 states. [2018-09-30 23:51:38,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:51:38,944 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-09-30 23:51:38,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-30 23:51:38,944 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 79 [2018-09-30 23:51:38,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:51:38,945 INFO L225 Difference]: With dead ends: 82 [2018-09-30 23:51:38,945 INFO L226 Difference]: Without dead ends: 81 [2018-09-30 23:51:38,946 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=157, Invalid=6163, Unknown=0, NotChecked=0, Total=6320 [2018-09-30 23:51:38,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-30 23:51:38,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-30 23:51:38,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-30 23:51:38,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-09-30 23:51:38,951 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2018-09-30 23:51:38,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:51:38,951 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-09-30 23:51:38,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-30 23:51:38,952 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-09-30 23:51:38,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-30 23:51:38,952 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:51:38,952 INFO L375 BasicCegarLoop]: trace histogram [78, 1, 1] [2018-09-30 23:51:38,952 INFO L423 AbstractCegarLoop]: === Iteration 79 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:51:38,953 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:51:38,953 INFO L82 PathProgramCache]: Analyzing trace with hash 253907591, now seen corresponding path program 78 times [2018-09-30 23:51:38,953 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:51:38,953 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:51:38,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:38,953 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:51:38,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:38,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:42,145 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:42,145 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:51:42,145 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:51:42,153 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:51:42,262 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2018-09-30 23:51:42,262 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:51:42,267 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:51:42,309 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:42,328 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:51:42,329 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-09-30 23:51:42,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-30 23:51:42,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-30 23:51:42,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=6321, Unknown=0, NotChecked=0, Total=6480 [2018-09-30 23:51:42,330 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 81 states. [2018-09-30 23:51:46,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:51:46,250 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-09-30 23:51:46,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-30 23:51:46,250 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 80 [2018-09-30 23:51:46,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:51:46,250 INFO L225 Difference]: With dead ends: 83 [2018-09-30 23:51:46,250 INFO L226 Difference]: Without dead ends: 82 [2018-09-30 23:51:46,251 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=159, Invalid=6321, Unknown=0, NotChecked=0, Total=6480 [2018-09-30 23:51:46,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-30 23:51:46,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-09-30 23:51:46,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-09-30 23:51:46,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-09-30 23:51:46,254 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2018-09-30 23:51:46,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:51:46,254 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-09-30 23:51:46,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-30 23:51:46,254 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-09-30 23:51:46,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-09-30 23:51:46,254 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:51:46,254 INFO L375 BasicCegarLoop]: trace histogram [79, 1, 1] [2018-09-30 23:51:46,255 INFO L423 AbstractCegarLoop]: === Iteration 80 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:51:46,255 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:51:46,255 INFO L82 PathProgramCache]: Analyzing trace with hash -718799327, now seen corresponding path program 79 times [2018-09-30 23:51:46,255 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:51:46,255 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:51:46,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:46,255 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:51:46,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:46,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:49,453 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:49,453 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:51:49,453 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:51:49,460 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:51:49,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:49,487 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:51:49,553 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:49,583 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:51:49,584 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-09-30 23:51:49,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-30 23:51:49,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-30 23:51:49,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=6481, Unknown=0, NotChecked=0, Total=6642 [2018-09-30 23:51:49,585 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 82 states. [2018-09-30 23:51:53,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:51:53,767 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2018-09-30 23:51:53,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-30 23:51:53,767 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 81 [2018-09-30 23:51:53,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:51:53,768 INFO L225 Difference]: With dead ends: 84 [2018-09-30 23:51:53,768 INFO L226 Difference]: Without dead ends: 83 [2018-09-30 23:51:53,769 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=161, Invalid=6481, Unknown=0, NotChecked=0, Total=6642 [2018-09-30 23:51:53,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-30 23:51:53,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-30 23:51:53,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-30 23:51:53,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-09-30 23:51:53,773 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2018-09-30 23:51:53,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:51:53,773 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-09-30 23:51:53,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-30 23:51:53,773 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-09-30 23:51:53,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-30 23:51:53,774 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:51:53,774 INFO L375 BasicCegarLoop]: trace histogram [80, 1, 1] [2018-09-30 23:51:53,774 INFO L423 AbstractCegarLoop]: === Iteration 81 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:51:53,774 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:51:53,774 INFO L82 PathProgramCache]: Analyzing trace with hash -807942713, now seen corresponding path program 80 times [2018-09-30 23:51:53,774 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:51:53,775 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:51:53,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:53,775 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:51:53,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:51:53,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:51:57,052 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:57,052 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:51:57,052 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:51:57,060 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:51:57,086 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:51:57,086 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:51:57,089 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:51:57,108 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:51:57,128 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:51:57,128 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-09-30 23:51:57,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-30 23:51:57,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-30 23:51:57,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=6643, Unknown=0, NotChecked=0, Total=6806 [2018-09-30 23:51:57,129 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 83 states. [2018-09-30 23:52:01,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:01,201 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-09-30 23:52:01,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-30 23:52:01,201 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 82 [2018-09-30 23:52:01,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:01,202 INFO L225 Difference]: With dead ends: 85 [2018-09-30 23:52:01,202 INFO L226 Difference]: Without dead ends: 84 [2018-09-30 23:52:01,203 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=163, Invalid=6643, Unknown=0, NotChecked=0, Total=6806 [2018-09-30 23:52:01,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-09-30 23:52:01,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-09-30 23:52:01,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-09-30 23:52:01,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-09-30 23:52:01,208 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2018-09-30 23:52:01,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:01,208 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-09-30 23:52:01,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-30 23:52:01,208 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-09-30 23:52:01,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-30 23:52:01,209 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:01,209 INFO L375 BasicCegarLoop]: trace histogram [81, 1, 1] [2018-09-30 23:52:01,209 INFO L423 AbstractCegarLoop]: === Iteration 82 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:01,209 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:01,209 INFO L82 PathProgramCache]: Analyzing trace with hash 723579617, now seen corresponding path program 81 times [2018-09-30 23:52:01,209 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:01,210 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:01,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:01,210 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:01,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:01,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:04,575 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:04,575 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:04,575 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:52:04,582 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:52:04,626 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-09-30 23:52:04,627 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:04,630 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:04,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:04,735 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:04,736 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-09-30 23:52:04,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-30 23:52:04,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-30 23:52:04,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=6807, Unknown=0, NotChecked=0, Total=6972 [2018-09-30 23:52:04,737 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 84 states. [2018-09-30 23:52:10,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:10,164 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-09-30 23:52:10,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-30 23:52:10,164 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 83 [2018-09-30 23:52:10,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:10,165 INFO L225 Difference]: With dead ends: 86 [2018-09-30 23:52:10,165 INFO L226 Difference]: Without dead ends: 85 [2018-09-30 23:52:10,166 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=165, Invalid=6807, Unknown=0, NotChecked=0, Total=6972 [2018-09-30 23:52:10,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-30 23:52:10,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-30 23:52:10,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-30 23:52:10,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-09-30 23:52:10,170 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2018-09-30 23:52:10,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:10,170 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-09-30 23:52:10,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-30 23:52:10,170 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-09-30 23:52:10,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-30 23:52:10,170 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:10,171 INFO L375 BasicCegarLoop]: trace histogram [82, 1, 1] [2018-09-30 23:52:10,171 INFO L423 AbstractCegarLoop]: === Iteration 83 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:10,171 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:10,171 INFO L82 PathProgramCache]: Analyzing trace with hash 956131591, now seen corresponding path program 82 times [2018-09-30 23:52:10,171 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:10,171 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:10,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:10,172 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:10,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:10,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:13,725 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:13,725 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:13,726 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:52:13,734 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:52:13,759 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:52:13,759 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:13,762 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:13,788 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:13,815 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:13,815 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-09-30 23:52:13,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-09-30 23:52:13,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-09-30 23:52:13,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=6973, Unknown=0, NotChecked=0, Total=7140 [2018-09-30 23:52:13,816 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 85 states. [2018-09-30 23:52:18,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:18,247 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-09-30 23:52:18,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-30 23:52:18,248 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 84 [2018-09-30 23:52:18,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:18,249 INFO L225 Difference]: With dead ends: 87 [2018-09-30 23:52:18,249 INFO L226 Difference]: Without dead ends: 86 [2018-09-30 23:52:18,249 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=167, Invalid=6973, Unknown=0, NotChecked=0, Total=7140 [2018-09-30 23:52:18,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-09-30 23:52:18,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-09-30 23:52:18,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-09-30 23:52:18,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-09-30 23:52:18,253 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2018-09-30 23:52:18,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:18,253 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-09-30 23:52:18,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-09-30 23:52:18,253 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-09-30 23:52:18,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-09-30 23:52:18,254 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:18,254 INFO L375 BasicCegarLoop]: trace histogram [83, 1, 1] [2018-09-30 23:52:18,254 INFO L423 AbstractCegarLoop]: === Iteration 84 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:18,254 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:18,254 INFO L82 PathProgramCache]: Analyzing trace with hash -424691807, now seen corresponding path program 83 times [2018-09-30 23:52:18,254 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:18,254 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:18,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:18,255 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:18,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:18,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:21,464 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:21,464 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:21,464 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:52:21,472 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:52:21,515 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-09-30 23:52:21,516 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:21,520 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:21,593 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:21,623 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:21,623 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-09-30 23:52:21,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-30 23:52:21,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-30 23:52:21,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=7141, Unknown=0, NotChecked=0, Total=7310 [2018-09-30 23:52:21,624 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 86 states. [2018-09-30 23:52:26,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:26,998 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-09-30 23:52:26,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-30 23:52:26,999 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 85 [2018-09-30 23:52:26,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:26,999 INFO L225 Difference]: With dead ends: 88 [2018-09-30 23:52:27,000 INFO L226 Difference]: Without dead ends: 87 [2018-09-30 23:52:27,000 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=169, Invalid=7141, Unknown=0, NotChecked=0, Total=7310 [2018-09-30 23:52:27,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-30 23:52:27,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-09-30 23:52:27,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-30 23:52:27,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-09-30 23:52:27,004 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2018-09-30 23:52:27,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:27,005 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-09-30 23:52:27,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-30 23:52:27,005 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-09-30 23:52:27,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-30 23:52:27,005 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:27,006 INFO L375 BasicCegarLoop]: trace histogram [84, 1, 1] [2018-09-30 23:52:27,006 INFO L423 AbstractCegarLoop]: === Iteration 85 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:27,006 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:27,006 INFO L82 PathProgramCache]: Analyzing trace with hash -280544185, now seen corresponding path program 84 times [2018-09-30 23:52:27,006 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:27,006 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:27,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:27,007 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:27,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:27,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:30,676 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:30,676 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:30,676 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:52:30,684 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:52:30,729 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-30 23:52:30,730 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:30,733 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:30,753 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:30,773 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:30,773 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-09-30 23:52:30,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-09-30 23:52:30,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-09-30 23:52:30,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=7311, Unknown=0, NotChecked=0, Total=7482 [2018-09-30 23:52:30,774 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 87 states. [2018-09-30 23:52:35,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:35,505 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-09-30 23:52:35,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-30 23:52:35,506 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 86 [2018-09-30 23:52:35,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:35,506 INFO L225 Difference]: With dead ends: 89 [2018-09-30 23:52:35,506 INFO L226 Difference]: Without dead ends: 88 [2018-09-30 23:52:35,507 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=171, Invalid=7311, Unknown=0, NotChecked=0, Total=7482 [2018-09-30 23:52:35,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-09-30 23:52:35,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-09-30 23:52:35,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-09-30 23:52:35,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-09-30 23:52:35,512 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2018-09-30 23:52:35,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:35,513 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-09-30 23:52:35,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-09-30 23:52:35,513 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-09-30 23:52:35,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-09-30 23:52:35,513 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:35,513 INFO L375 BasicCegarLoop]: trace histogram [85, 1, 1] [2018-09-30 23:52:35,514 INFO L423 AbstractCegarLoop]: === Iteration 86 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:35,514 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:35,514 INFO L82 PathProgramCache]: Analyzing trace with hash -106935199, now seen corresponding path program 85 times [2018-09-30 23:52:35,514 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:35,514 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:35,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:35,515 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:35,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:35,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:39,339 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:39,340 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:39,340 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:52:39,353 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:52:39,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:39,380 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:39,400 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:39,420 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:39,420 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-09-30 23:52:39,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-30 23:52:39,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-30 23:52:39,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=7483, Unknown=0, NotChecked=0, Total=7656 [2018-09-30 23:52:39,421 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 88 states. [2018-09-30 23:52:44,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:44,197 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2018-09-30 23:52:44,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-30 23:52:44,198 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 87 [2018-09-30 23:52:44,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:44,199 INFO L225 Difference]: With dead ends: 90 [2018-09-30 23:52:44,199 INFO L226 Difference]: Without dead ends: 89 [2018-09-30 23:52:44,199 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=173, Invalid=7483, Unknown=0, NotChecked=0, Total=7656 [2018-09-30 23:52:44,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-30 23:52:44,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-09-30 23:52:44,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-30 23:52:44,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-09-30 23:52:44,203 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2018-09-30 23:52:44,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:44,204 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-09-30 23:52:44,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-30 23:52:44,204 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-09-30 23:52:44,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-30 23:52:44,204 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:44,204 INFO L375 BasicCegarLoop]: trace histogram [86, 1, 1] [2018-09-30 23:52:44,205 INFO L423 AbstractCegarLoop]: === Iteration 87 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:44,205 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:44,205 INFO L82 PathProgramCache]: Analyzing trace with hash 979976071, now seen corresponding path program 86 times [2018-09-30 23:52:44,205 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:44,205 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:44,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:44,206 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:52:44,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:44,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:47,933 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:47,933 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:47,933 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:52:47,940 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:52:47,968 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:52:47,968 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:47,971 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:47,999 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:48,031 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:48,032 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-09-30 23:52:48,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-30 23:52:48,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-30 23:52:48,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=7657, Unknown=0, NotChecked=0, Total=7832 [2018-09-30 23:52:48,033 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 89 states. [2018-09-30 23:52:53,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:52:53,055 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-09-30 23:52:53,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-30 23:52:53,055 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 88 [2018-09-30 23:52:53,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:52:53,056 INFO L225 Difference]: With dead ends: 91 [2018-09-30 23:52:53,056 INFO L226 Difference]: Without dead ends: 90 [2018-09-30 23:52:53,056 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=175, Invalid=7657, Unknown=0, NotChecked=0, Total=7832 [2018-09-30 23:52:53,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-09-30 23:52:53,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-09-30 23:52:53,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-09-30 23:52:53,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-09-30 23:52:53,059 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2018-09-30 23:52:53,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:52:53,059 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-09-30 23:52:53,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-30 23:52:53,060 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-09-30 23:52:53,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-09-30 23:52:53,060 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:52:53,060 INFO L375 BasicCegarLoop]: trace histogram [87, 1, 1] [2018-09-30 23:52:53,060 INFO L423 AbstractCegarLoop]: === Iteration 88 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:52:53,060 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:52:53,060 INFO L82 PathProgramCache]: Analyzing trace with hash 314487073, now seen corresponding path program 87 times [2018-09-30 23:52:53,061 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:52:53,061 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:52:53,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:53,061 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:52:53,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:52:53,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:52:56,690 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:56,690 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:52:56,690 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:52:56,698 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:52:56,749 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-09-30 23:52:56,749 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:52:56,753 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:52:56,773 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:52:56,793 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:52:56,793 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-09-30 23:52:56,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-30 23:52:56,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-30 23:52:56,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=7833, Unknown=0, NotChecked=0, Total=8010 [2018-09-30 23:52:56,794 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 90 states. [2018-09-30 23:53:01,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:01,790 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2018-09-30 23:53:01,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-30 23:53:01,791 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 89 [2018-09-30 23:53:01,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:01,791 INFO L225 Difference]: With dead ends: 92 [2018-09-30 23:53:01,792 INFO L226 Difference]: Without dead ends: 91 [2018-09-30 23:53:01,792 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=177, Invalid=7833, Unknown=0, NotChecked=0, Total=8010 [2018-09-30 23:53:01,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-30 23:53:01,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-30 23:53:01,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-30 23:53:01,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-09-30 23:53:01,796 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2018-09-30 23:53:01,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:01,796 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-09-30 23:53:01,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-30 23:53:01,797 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-09-30 23:53:01,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-30 23:53:01,797 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:01,797 INFO L375 BasicCegarLoop]: trace histogram [88, 1, 1] [2018-09-30 23:53:01,797 INFO L423 AbstractCegarLoop]: === Iteration 89 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:01,797 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:01,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1159164615, now seen corresponding path program 88 times [2018-09-30 23:53:01,797 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:01,798 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:01,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:01,798 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:01,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:01,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:05,732 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:05,733 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:05,733 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:53:05,740 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:53:05,767 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:53:05,767 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:05,770 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:05,791 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:05,810 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:05,811 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-09-30 23:53:05,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-09-30 23:53:05,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-09-30 23:53:05,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=8011, Unknown=0, NotChecked=0, Total=8190 [2018-09-30 23:53:05,811 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 91 states. [2018-09-30 23:53:10,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:10,917 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-09-30 23:53:10,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-30 23:53:10,917 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 90 [2018-09-30 23:53:10,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:10,918 INFO L225 Difference]: With dead ends: 93 [2018-09-30 23:53:10,918 INFO L226 Difference]: Without dead ends: 92 [2018-09-30 23:53:10,919 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=179, Invalid=8011, Unknown=0, NotChecked=0, Total=8190 [2018-09-30 23:53:10,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-09-30 23:53:10,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-09-30 23:53:10,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-09-30 23:53:10,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-09-30 23:53:10,923 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2018-09-30 23:53:10,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:10,923 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-09-30 23:53:10,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-09-30 23:53:10,923 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-09-30 23:53:10,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-09-30 23:53:10,923 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:10,924 INFO L375 BasicCegarLoop]: trace histogram [89, 1, 1] [2018-09-30 23:53:10,924 INFO L423 AbstractCegarLoop]: === Iteration 90 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:10,924 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:10,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1574364641, now seen corresponding path program 89 times [2018-09-30 23:53:10,924 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:10,924 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:10,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:10,925 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:10,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:10,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:14,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:14,882 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:14,882 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:53:14,889 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:53:14,935 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-09-30 23:53:14,935 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:14,939 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:14,960 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:14,980 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:14,980 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-09-30 23:53:14,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-30 23:53:14,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-30 23:53:14,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=8191, Unknown=0, NotChecked=0, Total=8372 [2018-09-30 23:53:14,981 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 92 states. [2018-09-30 23:53:20,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:20,222 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-09-30 23:53:20,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-30 23:53:20,222 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 91 [2018-09-30 23:53:20,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:20,223 INFO L225 Difference]: With dead ends: 94 [2018-09-30 23:53:20,223 INFO L226 Difference]: Without dead ends: 93 [2018-09-30 23:53:20,224 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=181, Invalid=8191, Unknown=0, NotChecked=0, Total=8372 [2018-09-30 23:53:20,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-30 23:53:20,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-30 23:53:20,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-30 23:53:20,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-09-30 23:53:20,228 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2018-09-30 23:53:20,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:20,229 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-09-30 23:53:20,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-30 23:53:20,229 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-09-30 23:53:20,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-30 23:53:20,229 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:20,229 INFO L375 BasicCegarLoop]: trace histogram [90, 1, 1] [2018-09-30 23:53:20,229 INFO L423 AbstractCegarLoop]: === Iteration 91 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:20,229 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:20,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1560663559, now seen corresponding path program 90 times [2018-09-30 23:53:20,230 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:20,230 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:20,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:20,231 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:20,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:20,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:24,303 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:24,303 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:24,303 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:53:24,311 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:53:24,358 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2018-09-30 23:53:24,359 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:24,362 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:24,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:24,404 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:24,404 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-09-30 23:53:24,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-09-30 23:53:24,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-09-30 23:53:24,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=8373, Unknown=0, NotChecked=0, Total=8556 [2018-09-30 23:53:24,405 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 93 states. [2018-09-30 23:53:29,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:29,742 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-09-30 23:53:29,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-30 23:53:29,743 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 92 [2018-09-30 23:53:29,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:29,744 INFO L225 Difference]: With dead ends: 95 [2018-09-30 23:53:29,744 INFO L226 Difference]: Without dead ends: 94 [2018-09-30 23:53:29,744 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=183, Invalid=8373, Unknown=0, NotChecked=0, Total=8556 [2018-09-30 23:53:29,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-09-30 23:53:29,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-09-30 23:53:29,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-09-30 23:53:29,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-09-30 23:53:29,748 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2018-09-30 23:53:29,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:29,748 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-09-30 23:53:29,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-09-30 23:53:29,748 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-09-30 23:53:29,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-09-30 23:53:29,749 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:29,749 INFO L375 BasicCegarLoop]: trace histogram [91, 1, 1] [2018-09-30 23:53:29,749 INFO L423 AbstractCegarLoop]: === Iteration 92 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:29,749 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:29,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1135930017, now seen corresponding path program 91 times [2018-09-30 23:53:29,749 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:29,749 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:29,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:29,750 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:29,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:29,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:33,583 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:33,583 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:33,584 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:53:33,591 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:53:33,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:33,622 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:33,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:33,663 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:33,663 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-09-30 23:53:33,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-30 23:53:33,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-30 23:53:33,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=8557, Unknown=0, NotChecked=0, Total=8742 [2018-09-30 23:53:33,664 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 94 states. [2018-09-30 23:53:39,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:39,357 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2018-09-30 23:53:39,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-30 23:53:39,357 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 93 [2018-09-30 23:53:39,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:39,358 INFO L225 Difference]: With dead ends: 96 [2018-09-30 23:53:39,358 INFO L226 Difference]: Without dead ends: 95 [2018-09-30 23:53:39,359 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=185, Invalid=8557, Unknown=0, NotChecked=0, Total=8742 [2018-09-30 23:53:39,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-30 23:53:39,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-30 23:53:39,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-30 23:53:39,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-09-30 23:53:39,364 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2018-09-30 23:53:39,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:39,364 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-09-30 23:53:39,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-30 23:53:39,364 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-09-30 23:53:39,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-30 23:53:39,364 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:39,364 INFO L375 BasicCegarLoop]: trace histogram [92, 1, 1] [2018-09-30 23:53:39,365 INFO L423 AbstractCegarLoop]: === Iteration 93 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:39,365 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:39,365 INFO L82 PathProgramCache]: Analyzing trace with hash 854092103, now seen corresponding path program 92 times [2018-09-30 23:53:39,365 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:39,365 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:39,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:39,365 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:53:39,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:39,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:43,336 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:43,336 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:43,336 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:53:43,343 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:53:43,371 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:53:43,371 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:43,374 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:43,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:43,415 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:43,415 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-09-30 23:53:43,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-09-30 23:53:43,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-09-30 23:53:43,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=8743, Unknown=0, NotChecked=0, Total=8930 [2018-09-30 23:53:43,416 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 95 states. [2018-09-30 23:53:49,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:53:49,010 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-09-30 23:53:49,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-30 23:53:49,010 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 94 [2018-09-30 23:53:49,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:53:49,011 INFO L225 Difference]: With dead ends: 97 [2018-09-30 23:53:49,011 INFO L226 Difference]: Without dead ends: 96 [2018-09-30 23:53:49,012 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=187, Invalid=8743, Unknown=0, NotChecked=0, Total=8930 [2018-09-30 23:53:49,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-09-30 23:53:49,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-09-30 23:53:49,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-09-30 23:53:49,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-09-30 23:53:49,016 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2018-09-30 23:53:49,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:53:49,017 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-09-30 23:53:49,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-09-30 23:53:49,017 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-09-30 23:53:49,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-09-30 23:53:49,017 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:53:49,017 INFO L375 BasicCegarLoop]: trace histogram [93, 1, 1] [2018-09-30 23:53:49,017 INFO L423 AbstractCegarLoop]: === Iteration 94 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:53:49,018 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:53:49,018 INFO L82 PathProgramCache]: Analyzing trace with hash 707051361, now seen corresponding path program 93 times [2018-09-30 23:53:49,018 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:53:49,018 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:53:49,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:49,019 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:53:49,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:53:49,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:53:54,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:54,072 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:53:54,072 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:53:54,079 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:53:54,132 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-09-30 23:53:54,132 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:53:54,135 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:53:54,158 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:53:54,178 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:53:54,179 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-09-30 23:53:54,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-30 23:53:54,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-30 23:53:54,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=8931, Unknown=0, NotChecked=0, Total=9120 [2018-09-30 23:53:54,180 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 96 states. [2018-09-30 23:54:00,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:54:00,019 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-09-30 23:54:00,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-30 23:54:00,020 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 95 [2018-09-30 23:54:00,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:54:00,021 INFO L225 Difference]: With dead ends: 98 [2018-09-30 23:54:00,021 INFO L226 Difference]: Without dead ends: 97 [2018-09-30 23:54:00,022 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=189, Invalid=8931, Unknown=0, NotChecked=0, Total=9120 [2018-09-30 23:54:00,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-30 23:54:00,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-30 23:54:00,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-30 23:54:00,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-09-30 23:54:00,026 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2018-09-30 23:54:00,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:54:00,026 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-09-30 23:54:00,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-30 23:54:00,027 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-09-30 23:54:00,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-30 23:54:00,027 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:54:00,027 INFO L375 BasicCegarLoop]: trace histogram [94, 1, 1] [2018-09-30 23:54:00,027 INFO L423 AbstractCegarLoop]: === Iteration 95 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:54:00,028 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:54:00,028 INFO L82 PathProgramCache]: Analyzing trace with hash 443755655, now seen corresponding path program 94 times [2018-09-30 23:54:00,028 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:54:00,028 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:54:00,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:00,028 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:54:00,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:00,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:04,283 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:04,284 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:54:04,284 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:54:04,291 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:54:04,320 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:54:04,320 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:54:04,324 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:54:04,389 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:04,418 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:54:04,419 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-09-30 23:54:04,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-09-30 23:54:04,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-09-30 23:54:04,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=9121, Unknown=0, NotChecked=0, Total=9312 [2018-09-30 23:54:04,420 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 97 states. [2018-09-30 23:54:10,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:54:10,353 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-09-30 23:54:10,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-30 23:54:10,353 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 96 [2018-09-30 23:54:10,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:54:10,354 INFO L225 Difference]: With dead ends: 99 [2018-09-30 23:54:10,354 INFO L226 Difference]: Without dead ends: 98 [2018-09-30 23:54:10,355 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=191, Invalid=9121, Unknown=0, NotChecked=0, Total=9312 [2018-09-30 23:54:10,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-09-30 23:54:10,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-09-30 23:54:10,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-09-30 23:54:10,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-09-30 23:54:10,359 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2018-09-30 23:54:10,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:54:10,360 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-09-30 23:54:10,360 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-09-30 23:54:10,360 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-09-30 23:54:10,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-09-30 23:54:10,360 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:54:10,360 INFO L375 BasicCegarLoop]: trace histogram [95, 1, 1] [2018-09-30 23:54:10,360 INFO L423 AbstractCegarLoop]: === Iteration 96 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:54:10,361 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:54:10,361 INFO L82 PathProgramCache]: Analyzing trace with hash 871523361, now seen corresponding path program 95 times [2018-09-30 23:54:10,361 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:54:10,361 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:54:10,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:10,362 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:54:10,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:10,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:14,612 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:14,612 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:54:14,613 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:54:14,625 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:54:14,691 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-09-30 23:54:14,692 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:54:14,696 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:54:14,720 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:14,740 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:54:14,741 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-09-30 23:54:14,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-30 23:54:14,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-30 23:54:14,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=9313, Unknown=0, NotChecked=0, Total=9506 [2018-09-30 23:54:14,741 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 98 states. [2018-09-30 23:54:20,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:54:20,780 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2018-09-30 23:54:20,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-09-30 23:54:20,780 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 97 [2018-09-30 23:54:20,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:54:20,781 INFO L225 Difference]: With dead ends: 100 [2018-09-30 23:54:20,781 INFO L226 Difference]: Without dead ends: 99 [2018-09-30 23:54:20,782 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=193, Invalid=9313, Unknown=0, NotChecked=0, Total=9506 [2018-09-30 23:54:20,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-30 23:54:20,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-30 23:54:20,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-30 23:54:20,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-09-30 23:54:20,785 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2018-09-30 23:54:20,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:54:20,786 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-09-30 23:54:20,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-30 23:54:20,786 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-09-30 23:54:20,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-30 23:54:20,786 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:54:20,786 INFO L375 BasicCegarLoop]: trace histogram [96, 1, 1] [2018-09-30 23:54:20,786 INFO L423 AbstractCegarLoop]: === Iteration 97 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:54:20,787 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:54:20,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1247420359, now seen corresponding path program 96 times [2018-09-30 23:54:20,787 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:54:20,787 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:54:20,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:20,788 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:54:20,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:20,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:25,406 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:25,406 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:54:25,406 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:54:25,413 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:54:25,481 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-30 23:54:25,481 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:54:25,484 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:54:25,508 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:25,527 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:54:25,528 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-09-30 23:54:25,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-09-30 23:54:25,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-09-30 23:54:25,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=9507, Unknown=0, NotChecked=0, Total=9702 [2018-09-30 23:54:25,528 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 99 states. [2018-09-30 23:54:31,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:54:31,583 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-09-30 23:54:31,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-09-30 23:54:31,583 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 98 [2018-09-30 23:54:31,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:54:31,584 INFO L225 Difference]: With dead ends: 101 [2018-09-30 23:54:31,585 INFO L226 Difference]: Without dead ends: 100 [2018-09-30 23:54:31,585 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=195, Invalid=9507, Unknown=0, NotChecked=0, Total=9702 [2018-09-30 23:54:31,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-09-30 23:54:31,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-09-30 23:54:31,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-09-30 23:54:31,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-09-30 23:54:31,589 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2018-09-30 23:54:31,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:54:31,590 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-09-30 23:54:31,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-09-30 23:54:31,590 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-09-30 23:54:31,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-09-30 23:54:31,590 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:54:31,590 INFO L375 BasicCegarLoop]: trace histogram [97, 1, 1] [2018-09-30 23:54:31,591 INFO L423 AbstractCegarLoop]: === Iteration 98 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:54:31,591 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:54:31,591 INFO L82 PathProgramCache]: Analyzing trace with hash 15325409, now seen corresponding path program 97 times [2018-09-30 23:54:31,591 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:54:31,591 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:54:31,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:31,592 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:54:31,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:31,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:36,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:36,431 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:54:36,431 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:54:36,439 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:54:36,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:36,472 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:54:36,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:36,527 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:54:36,528 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-09-30 23:54:36,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-30 23:54:36,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-30 23:54:36,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=9703, Unknown=0, NotChecked=0, Total=9900 [2018-09-30 23:54:36,528 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 100 states. [2018-09-30 23:54:42,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:54:42,726 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2018-09-30 23:54:42,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-09-30 23:54:42,726 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 99 [2018-09-30 23:54:42,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:54:42,727 INFO L225 Difference]: With dead ends: 102 [2018-09-30 23:54:42,727 INFO L226 Difference]: Without dead ends: 101 [2018-09-30 23:54:42,728 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=197, Invalid=9703, Unknown=0, NotChecked=0, Total=9900 [2018-09-30 23:54:42,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-30 23:54:42,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-30 23:54:42,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-30 23:54:42,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-09-30 23:54:42,732 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2018-09-30 23:54:42,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:54:42,732 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-09-30 23:54:42,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-30 23:54:42,733 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-09-30 23:54:42,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-30 23:54:42,733 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:54:42,733 INFO L375 BasicCegarLoop]: trace histogram [98, 1, 1] [2018-09-30 23:54:42,733 INFO L423 AbstractCegarLoop]: === Iteration 99 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:54:42,733 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:54:42,733 INFO L82 PathProgramCache]: Analyzing trace with hash 475087623, now seen corresponding path program 98 times [2018-09-30 23:54:42,734 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:54:42,734 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:54:42,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:42,734 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:54:42,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:42,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:47,592 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:47,592 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:54:47,592 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:54:47,599 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:54:47,629 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:54:47,629 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:54:47,633 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:54:47,657 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:47,677 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:54:47,677 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-09-30 23:54:47,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-30 23:54:47,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-30 23:54:47,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=9901, Unknown=0, NotChecked=0, Total=10100 [2018-09-30 23:54:47,678 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 101 states. [2018-09-30 23:54:53,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:54:53,970 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-09-30 23:54:53,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-09-30 23:54:53,971 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 100 [2018-09-30 23:54:53,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:54:53,972 INFO L225 Difference]: With dead ends: 103 [2018-09-30 23:54:53,972 INFO L226 Difference]: Without dead ends: 102 [2018-09-30 23:54:53,973 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=199, Invalid=9901, Unknown=0, NotChecked=0, Total=10100 [2018-09-30 23:54:53,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-09-30 23:54:53,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-09-30 23:54:53,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-09-30 23:54:53,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-09-30 23:54:53,977 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2018-09-30 23:54:53,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:54:53,977 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-09-30 23:54:53,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-30 23:54:53,977 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-09-30 23:54:53,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-09-30 23:54:53,977 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:54:53,977 INFO L375 BasicCegarLoop]: trace histogram [99, 1, 1] [2018-09-30 23:54:53,978 INFO L423 AbstractCegarLoop]: === Iteration 100 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:54:53,978 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:54:53,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1842814369, now seen corresponding path program 99 times [2018-09-30 23:54:53,978 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:54:53,978 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:54:53,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:53,979 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:54:53,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:53,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:58,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:58,854 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:54:58,854 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:54:58,861 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:54:58,919 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2018-09-30 23:54:58,919 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:54:58,923 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:54:58,954 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:58,974 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:54:58,974 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-09-30 23:54:58,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-30 23:54:58,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-30 23:54:58,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=10101, Unknown=0, NotChecked=0, Total=10302 [2018-09-30 23:54:58,975 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 102 states. [2018-09-30 23:55:05,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:55:05,398 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2018-09-30 23:55:05,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-09-30 23:55:05,398 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 101 [2018-09-30 23:55:05,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:55:05,399 INFO L225 Difference]: With dead ends: 104 [2018-09-30 23:55:05,399 INFO L226 Difference]: Without dead ends: 103 [2018-09-30 23:55:05,400 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=201, Invalid=10101, Unknown=0, NotChecked=0, Total=10302 [2018-09-30 23:55:05,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-30 23:55:05,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-30 23:55:05,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-30 23:55:05,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-09-30 23:55:05,405 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101 [2018-09-30 23:55:05,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:55:05,405 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-09-30 23:55:05,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-30 23:55:05,405 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-09-30 23:55:05,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-30 23:55:05,406 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:55:05,406 INFO L375 BasicCegarLoop]: trace histogram [100, 1, 1] [2018-09-30 23:55:05,406 INFO L423 AbstractCegarLoop]: === Iteration 101 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:55:05,406 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:55:05,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1292670535, now seen corresponding path program 100 times [2018-09-30 23:55:05,406 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:55:05,406 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:55:05,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:05,407 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:55:05,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:05,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:55:10,253 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:10,254 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:55:10,254 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:55:10,261 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:55:10,293 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:55:10,293 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:55:10,296 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:55:10,322 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:10,342 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:55:10,342 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-09-30 23:55:10,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-09-30 23:55:10,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-09-30 23:55:10,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=10303, Unknown=0, NotChecked=0, Total=10506 [2018-09-30 23:55:10,343 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 103 states. [2018-09-30 23:55:17,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:55:17,036 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-09-30 23:55:17,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-30 23:55:17,037 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 102 [2018-09-30 23:55:17,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:55:17,038 INFO L225 Difference]: With dead ends: 105 [2018-09-30 23:55:17,038 INFO L226 Difference]: Without dead ends: 104 [2018-09-30 23:55:17,039 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=203, Invalid=10303, Unknown=0, NotChecked=0, Total=10506 [2018-09-30 23:55:17,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-09-30 23:55:17,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-09-30 23:55:17,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-09-30 23:55:17,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-09-30 23:55:17,044 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102 [2018-09-30 23:55:17,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:55:17,045 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-09-30 23:55:17,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-09-30 23:55:17,045 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-09-30 23:55:17,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-09-30 23:55:17,045 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:55:17,045 INFO L375 BasicCegarLoop]: trace histogram [101, 1, 1] [2018-09-30 23:55:17,046 INFO L423 AbstractCegarLoop]: === Iteration 102 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:55:17,046 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:55:17,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1418080865, now seen corresponding path program 101 times [2018-09-30 23:55:17,046 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:55:17,046 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:55:17,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:17,047 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:55:17,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:17,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:55:22,035 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:22,035 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:55:22,035 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:55:22,044 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:55:22,371 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2018-09-30 23:55:22,372 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:55:22,376 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:55:22,407 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:22,435 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:55:22,436 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-09-30 23:55:22,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-30 23:55:22,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-30 23:55:22,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=10507, Unknown=0, NotChecked=0, Total=10712 [2018-09-30 23:55:22,437 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 104 states. [2018-09-30 23:55:29,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:55:29,113 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2018-09-30 23:55:29,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-09-30 23:55:29,114 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 103 [2018-09-30 23:55:29,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:55:29,115 INFO L225 Difference]: With dead ends: 106 [2018-09-30 23:55:29,115 INFO L226 Difference]: Without dead ends: 105 [2018-09-30 23:55:29,116 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=205, Invalid=10507, Unknown=0, NotChecked=0, Total=10712 [2018-09-30 23:55:29,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-09-30 23:55:29,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-09-30 23:55:29,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-30 23:55:29,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-09-30 23:55:29,121 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 103 [2018-09-30 23:55:29,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:55:29,122 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-09-30 23:55:29,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-30 23:55:29,122 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-09-30 23:55:29,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-30 23:55:29,122 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:55:29,123 INFO L375 BasicCegarLoop]: trace histogram [102, 1, 1] [2018-09-30 23:55:29,123 INFO L423 AbstractCegarLoop]: === Iteration 103 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:55:29,123 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:55:29,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1010833799, now seen corresponding path program 102 times [2018-09-30 23:55:29,123 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:55:29,123 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:55:29,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:29,124 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:55:29,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:29,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:55:34,348 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:34,348 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:55:34,349 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:55:34,356 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:55:34,422 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2018-09-30 23:55:34,422 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:55:34,426 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:55:34,451 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:34,471 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:55:34,471 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-09-30 23:55:34,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-09-30 23:55:34,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-09-30 23:55:34,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=10713, Unknown=0, NotChecked=0, Total=10920 [2018-09-30 23:55:34,472 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 105 states. [2018-09-30 23:55:41,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:55:41,256 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-09-30 23:55:41,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-09-30 23:55:41,257 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 104 [2018-09-30 23:55:41,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:55:41,258 INFO L225 Difference]: With dead ends: 107 [2018-09-30 23:55:41,258 INFO L226 Difference]: Without dead ends: 106 [2018-09-30 23:55:41,259 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=207, Invalid=10713, Unknown=0, NotChecked=0, Total=10920 [2018-09-30 23:55:41,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-09-30 23:55:41,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-09-30 23:55:41,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-09-30 23:55:41,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-09-30 23:55:41,265 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 104 [2018-09-30 23:55:41,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:55:41,265 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-09-30 23:55:41,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-09-30 23:55:41,265 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-09-30 23:55:41,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-09-30 23:55:41,266 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:55:41,266 INFO L375 BasicCegarLoop]: trace histogram [103, 1, 1] [2018-09-30 23:55:41,266 INFO L423 AbstractCegarLoop]: === Iteration 104 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:55:41,266 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:55:41,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1271076641, now seen corresponding path program 103 times [2018-09-30 23:55:41,267 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:55:41,267 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:55:41,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:41,267 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:55:41,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:41,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:55:46,557 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:46,558 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:55:46,558 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:55:46,566 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:55:46,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:55:46,601 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:55:46,634 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:46,658 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:55:46,658 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-09-30 23:55:46,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-30 23:55:46,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-30 23:55:46,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=10921, Unknown=0, NotChecked=0, Total=11130 [2018-09-30 23:55:46,659 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 106 states. [2018-09-30 23:55:53,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:55:53,773 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2018-09-30 23:55:53,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-09-30 23:55:53,773 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 105 [2018-09-30 23:55:53,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:55:53,774 INFO L225 Difference]: With dead ends: 108 [2018-09-30 23:55:53,774 INFO L226 Difference]: Without dead ends: 107 [2018-09-30 23:55:53,775 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=209, Invalid=10921, Unknown=0, NotChecked=0, Total=11130 [2018-09-30 23:55:53,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-30 23:55:53,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-09-30 23:55:53,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-30 23:55:53,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-09-30 23:55:53,780 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 105 [2018-09-30 23:55:53,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:55:53,781 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-09-30 23:55:53,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-30 23:55:53,781 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-09-30 23:55:53,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-30 23:55:53,781 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:55:53,781 INFO L375 BasicCegarLoop]: trace histogram [104, 1, 1] [2018-09-30 23:55:53,782 INFO L423 AbstractCegarLoop]: === Iteration 105 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:55:53,782 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:55:53,782 INFO L82 PathProgramCache]: Analyzing trace with hash 748670151, now seen corresponding path program 104 times [2018-09-30 23:55:53,782 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:55:53,782 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:55:53,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:53,783 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:55:53,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:55:53,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:55:59,168 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:59,168 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:55:59,168 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:55:59,176 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:55:59,213 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:55:59,213 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:55:59,217 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:55:59,298 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:55:59,319 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:55:59,319 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-09-30 23:55:59,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-09-30 23:55:59,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-09-30 23:55:59,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=11131, Unknown=0, NotChecked=0, Total=11342 [2018-09-30 23:55:59,320 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 107 states. [2018-09-30 23:56:06,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:06,406 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-09-30 23:56:06,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-09-30 23:56:06,406 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 106 [2018-09-30 23:56:06,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:06,407 INFO L225 Difference]: With dead ends: 109 [2018-09-30 23:56:06,407 INFO L226 Difference]: Without dead ends: 108 [2018-09-30 23:56:06,407 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=211, Invalid=11131, Unknown=0, NotChecked=0, Total=11342 [2018-09-30 23:56:06,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-09-30 23:56:06,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-09-30 23:56:06,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-09-30 23:56:06,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-09-30 23:56:06,413 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 106 [2018-09-30 23:56:06,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:06,414 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-09-30 23:56:06,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-09-30 23:56:06,414 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-09-30 23:56:06,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-09-30 23:56:06,414 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:06,414 INFO L375 BasicCegarLoop]: trace histogram [105, 1, 1] [2018-09-30 23:56:06,415 INFO L423 AbstractCegarLoop]: === Iteration 106 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:06,415 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:06,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1733938145, now seen corresponding path program 105 times [2018-09-30 23:56:06,415 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:06,415 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:06,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:06,415 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:06,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:06,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:11,878 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:11,878 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:11,878 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:11,886 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:56:11,948 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2018-09-30 23:56:11,949 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:11,952 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:11,988 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:12,024 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:12,024 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106 [2018-09-30 23:56:12,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-30 23:56:12,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-30 23:56:12,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=11343, Unknown=0, NotChecked=0, Total=11556 [2018-09-30 23:56:12,025 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 108 states. [2018-09-30 23:56:19,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:19,469 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2018-09-30 23:56:19,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-09-30 23:56:19,469 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 107 [2018-09-30 23:56:19,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:19,470 INFO L225 Difference]: With dead ends: 110 [2018-09-30 23:56:19,470 INFO L226 Difference]: Without dead ends: 109 [2018-09-30 23:56:19,470 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=213, Invalid=11343, Unknown=0, NotChecked=0, Total=11556 [2018-09-30 23:56:19,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-30 23:56:19,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-30 23:56:19,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-30 23:56:19,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-09-30 23:56:19,475 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 107 [2018-09-30 23:56:19,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:19,475 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-09-30 23:56:19,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-30 23:56:19,475 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-09-30 23:56:19,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-30 23:56:19,476 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:19,476 INFO L375 BasicCegarLoop]: trace histogram [106, 1, 1] [2018-09-30 23:56:19,476 INFO L423 AbstractCegarLoop]: === Iteration 107 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:19,476 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:19,476 INFO L82 PathProgramCache]: Analyzing trace with hash -2082492409, now seen corresponding path program 106 times [2018-09-30 23:56:19,476 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:19,476 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:19,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:19,477 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:19,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:19,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:24,914 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:24,914 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:24,914 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:24,921 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:56:24,954 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:56:24,954 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:24,958 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:24,989 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:25,009 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:25,010 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-09-30 23:56:25,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-09-30 23:56:25,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-09-30 23:56:25,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=11557, Unknown=0, NotChecked=0, Total=11772 [2018-09-30 23:56:25,011 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 109 states. [2018-09-30 23:56:32,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:32,315 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-09-30 23:56:32,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-09-30 23:56:32,315 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 108 [2018-09-30 23:56:32,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:32,316 INFO L225 Difference]: With dead ends: 111 [2018-09-30 23:56:32,316 INFO L226 Difference]: Without dead ends: 110 [2018-09-30 23:56:32,317 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=215, Invalid=11557, Unknown=0, NotChecked=0, Total=11772 [2018-09-30 23:56:32,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-09-30 23:56:32,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-09-30 23:56:32,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-09-30 23:56:32,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-09-30 23:56:32,321 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 108 [2018-09-30 23:56:32,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:32,321 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-09-30 23:56:32,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-09-30 23:56:32,321 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-09-30 23:56:32,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-09-30 23:56:32,322 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:32,322 INFO L375 BasicCegarLoop]: trace histogram [107, 1, 1] [2018-09-30 23:56:32,322 INFO L423 AbstractCegarLoop]: === Iteration 108 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:32,322 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:32,323 INFO L82 PathProgramCache]: Analyzing trace with hash -132755295, now seen corresponding path program 107 times [2018-09-30 23:56:32,323 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:32,323 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:32,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:32,323 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:32,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:32,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:37,882 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:37,883 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:37,883 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:37,891 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:56:37,967 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2018-09-30 23:56:37,967 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:37,971 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:38,000 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:38,022 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:38,022 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 108 [2018-09-30 23:56:38,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-09-30 23:56:38,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-09-30 23:56:38,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=11773, Unknown=0, NotChecked=0, Total=11990 [2018-09-30 23:56:38,023 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 110 states. [2018-09-30 23:56:45,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:45,598 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2018-09-30 23:56:45,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-09-30 23:56:45,599 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 109 [2018-09-30 23:56:45,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:45,600 INFO L225 Difference]: With dead ends: 112 [2018-09-30 23:56:45,600 INFO L226 Difference]: Without dead ends: 111 [2018-09-30 23:56:45,600 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=217, Invalid=11773, Unknown=0, NotChecked=0, Total=11990 [2018-09-30 23:56:45,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-30 23:56:45,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-09-30 23:56:45,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-30 23:56:45,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-09-30 23:56:45,606 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 109 [2018-09-30 23:56:45,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:45,606 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-09-30 23:56:45,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-09-30 23:56:45,606 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-09-30 23:56:45,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-30 23:56:45,606 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:45,607 INFO L375 BasicCegarLoop]: trace histogram [108, 1, 1] [2018-09-30 23:56:45,607 INFO L423 AbstractCegarLoop]: === Iteration 109 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:45,607 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:45,607 INFO L82 PathProgramCache]: Analyzing trace with hash 179553095, now seen corresponding path program 108 times [2018-09-30 23:56:45,607 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:45,607 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:45,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:45,608 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:45,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:45,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:51,325 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 0 proven. 5886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:51,325 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:51,325 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:51,332 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:56:51,399 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-09-30 23:56:51,399 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:51,403 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:51,436 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 0 proven. 5886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:51,456 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:51,456 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109] total 109 [2018-09-30 23:56:51,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 111 states [2018-09-30 23:56:51,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2018-09-30 23:56:51,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=11991, Unknown=0, NotChecked=0, Total=12210 [2018-09-30 23:56:51,457 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 111 states. [2018-09-30 23:56:59,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:59,188 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-09-30 23:56:59,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-09-30 23:56:59,188 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 110 [2018-09-30 23:56:59,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:59,189 INFO L225 Difference]: With dead ends: 113 [2018-09-30 23:56:59,189 INFO L226 Difference]: Without dead ends: 112 [2018-09-30 23:56:59,189 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=219, Invalid=11991, Unknown=0, NotChecked=0, Total=12210 [2018-09-30 23:56:59,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-09-30 23:56:59,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-09-30 23:56:59,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-09-30 23:56:59,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-09-30 23:56:59,195 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 110 [2018-09-30 23:56:59,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:59,195 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-09-30 23:56:59,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has 111 states. [2018-09-30 23:56:59,195 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-09-30 23:56:59,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-09-30 23:56:59,195 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:59,196 INFO L375 BasicCegarLoop]: trace histogram [109, 1, 1] [2018-09-30 23:56:59,196 INFO L423 AbstractCegarLoop]: === Iteration 110 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:59,196 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:59,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1271178593, now seen corresponding path program 109 times [2018-09-30 23:56:59,196 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:59,196 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:59,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:59,197 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:59,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:59,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:04,914 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:04,914 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:04,914 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:04,921 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:57:04,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:04,957 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:04,993 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:05,013 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:05,013 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 110] total 110 [2018-09-30 23:57:05,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-09-30 23:57:05,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-09-30 23:57:05,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=12211, Unknown=0, NotChecked=0, Total=12432 [2018-09-30 23:57:05,014 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 112 states. [2018-09-30 23:57:12,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:12,713 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2018-09-30 23:57:12,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-09-30 23:57:12,713 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 111 [2018-09-30 23:57:12,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:12,714 INFO L225 Difference]: With dead ends: 114 [2018-09-30 23:57:12,714 INFO L226 Difference]: Without dead ends: 113 [2018-09-30 23:57:12,715 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=221, Invalid=12211, Unknown=0, NotChecked=0, Total=12432 [2018-09-30 23:57:12,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-30 23:57:12,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-09-30 23:57:12,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-30 23:57:12,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-09-30 23:57:12,719 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 111 [2018-09-30 23:57:12,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:12,720 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-09-30 23:57:12,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-09-30 23:57:12,720 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-09-30 23:57:12,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-30 23:57:12,720 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:12,721 INFO L375 BasicCegarLoop]: trace histogram [110, 1, 1] [2018-09-30 23:57:12,721 INFO L423 AbstractCegarLoop]: === Iteration 111 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:12,721 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:12,721 INFO L82 PathProgramCache]: Analyzing trace with hash 751830663, now seen corresponding path program 110 times [2018-09-30 23:57:12,721 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:12,721 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:12,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:12,722 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:57:12,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:12,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:18,584 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:18,584 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:18,584 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:18,592 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:57:18,623 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:57:18,624 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:18,627 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:18,668 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:18,688 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:18,689 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 111] total 111 [2018-09-30 23:57:18,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-09-30 23:57:18,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-09-30 23:57:18,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=12433, Unknown=0, NotChecked=0, Total=12656 [2018-09-30 23:57:18,690 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 113 states. [2018-09-30 23:57:26,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:26,719 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-09-30 23:57:26,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-09-30 23:57:26,720 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 112 [2018-09-30 23:57:26,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:26,721 INFO L225 Difference]: With dead ends: 115 [2018-09-30 23:57:26,721 INFO L226 Difference]: Without dead ends: 114 [2018-09-30 23:57:26,722 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=223, Invalid=12433, Unknown=0, NotChecked=0, Total=12656 [2018-09-30 23:57:26,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-09-30 23:57:26,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-09-30 23:57:26,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-09-30 23:57:26,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2018-09-30 23:57:26,727 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 112 [2018-09-30 23:57:26,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:26,728 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2018-09-30 23:57:26,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-09-30 23:57:26,728 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2018-09-30 23:57:26,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-09-30 23:57:26,728 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:26,729 INFO L375 BasicCegarLoop]: trace histogram [111, 1, 1] [2018-09-30 23:57:26,729 INFO L423 AbstractCegarLoop]: === Iteration 112 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:26,729 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:26,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1831914017, now seen corresponding path program 111 times [2018-09-30 23:57:26,729 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:26,729 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:26,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:26,730 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:26,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:26,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:32,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:32,686 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:32,686 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:32,692 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:57:32,767 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 57 check-sat command(s) [2018-09-30 23:57:32,767 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:32,771 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:32,799 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:32,819 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:32,819 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 112] total 112 [2018-09-30 23:57:32,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-09-30 23:57:32,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-09-30 23:57:32,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=12657, Unknown=0, NotChecked=0, Total=12882 [2018-09-30 23:57:32,820 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 114 states. [2018-09-30 23:57:40,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:40,976 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2018-09-30 23:57:40,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2018-09-30 23:57:40,976 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 113 [2018-09-30 23:57:40,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:40,977 INFO L225 Difference]: With dead ends: 116 [2018-09-30 23:57:40,977 INFO L226 Difference]: Without dead ends: 115 [2018-09-30 23:57:40,978 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=225, Invalid=12657, Unknown=0, NotChecked=0, Total=12882 [2018-09-30 23:57:40,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-30 23:57:40,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-09-30 23:57:40,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-30 23:57:40,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-09-30 23:57:40,984 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 113 [2018-09-30 23:57:40,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:40,984 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-09-30 23:57:40,984 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-09-30 23:57:40,984 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-09-30 23:57:40,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-30 23:57:40,985 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:40,985 INFO L375 BasicCegarLoop]: trace histogram [112, 1, 1] [2018-09-30 23:57:40,985 INFO L423 AbstractCegarLoop]: === Iteration 113 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:40,985 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:40,985 INFO L82 PathProgramCache]: Analyzing trace with hash 954759623, now seen corresponding path program 112 times [2018-09-30 23:57:40,985 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:40,986 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:40,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:40,986 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:40,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:41,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:47,123 INFO L134 CoverageAnalysis]: Checked inductivity of 6328 backedges. 0 proven. 6328 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:47,123 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:47,123 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:47,132 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:57:47,172 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:57:47,173 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:47,177 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:47,223 INFO L134 CoverageAnalysis]: Checked inductivity of 6328 backedges. 0 proven. 6328 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:47,243 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:47,243 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 113] total 113 [2018-09-30 23:57:47,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 115 states [2018-09-30 23:57:47,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2018-09-30 23:57:47,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=12883, Unknown=0, NotChecked=0, Total=13110 [2018-09-30 23:57:47,244 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 115 states. [2018-09-30 23:57:55,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:55,557 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-09-30 23:57:55,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2018-09-30 23:57:55,558 INFO L78 Accepts]: Start accepts. Automaton has 115 states. Word has length 114 [2018-09-30 23:57:55,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:55,559 INFO L225 Difference]: With dead ends: 117 [2018-09-30 23:57:55,559 INFO L226 Difference]: Without dead ends: 116 [2018-09-30 23:57:55,559 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=227, Invalid=12883, Unknown=0, NotChecked=0, Total=13110 [2018-09-30 23:57:55,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-09-30 23:57:55,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-09-30 23:57:55,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-09-30 23:57:55,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2018-09-30 23:57:55,564 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 114 [2018-09-30 23:57:55,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:55,564 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2018-09-30 23:57:55,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has 115 states. [2018-09-30 23:57:55,564 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2018-09-30 23:57:55,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-09-30 23:57:55,565 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:55,565 INFO L375 BasicCegarLoop]: trace histogram [113, 1, 1] [2018-09-30 23:57:55,565 INFO L423 AbstractCegarLoop]: === Iteration 114 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:55,565 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:55,565 INFO L82 PathProgramCache]: Analyzing trace with hash -467222815, now seen corresponding path program 113 times [2018-09-30 23:57:55,565 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:55,565 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:55,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:55,566 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:55,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:55,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:01,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 0 proven. 6441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:01,818 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:01,818 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:01,826 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:58:01,889 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 58 check-sat command(s) [2018-09-30 23:58:01,890 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:01,894 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:01,939 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 0 proven. 6441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:01,959 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:01,960 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [114, 114] total 114 [2018-09-30 23:58:01,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-09-30 23:58:01,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-09-30 23:58:01,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=13111, Unknown=0, NotChecked=0, Total=13340 [2018-09-30 23:58:01,960 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 116 states. [2018-09-30 23:58:10,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:10,198 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2018-09-30 23:58:10,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2018-09-30 23:58:10,198 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 115 [2018-09-30 23:58:10,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:10,198 INFO L225 Difference]: With dead ends: 118 [2018-09-30 23:58:10,199 INFO L226 Difference]: Without dead ends: 117 [2018-09-30 23:58:10,199 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=229, Invalid=13111, Unknown=0, NotChecked=0, Total=13340 [2018-09-30 23:58:10,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-09-30 23:58:10,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-09-30 23:58:10,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-09-30 23:58:10,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2018-09-30 23:58:10,203 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 115 [2018-09-30 23:58:10,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:10,203 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2018-09-30 23:58:10,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-09-30 23:58:10,204 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2018-09-30 23:58:10,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-30 23:58:10,204 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:10,204 INFO L375 BasicCegarLoop]: trace histogram [114, 1, 1] [2018-09-30 23:58:10,204 INFO L423 AbstractCegarLoop]: === Iteration 115 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:10,204 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:10,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1599005433, now seen corresponding path program 114 times [2018-09-30 23:58:10,205 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:10,205 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:10,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:10,205 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:10,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:10,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:16,733 INFO L134 CoverageAnalysis]: Checked inductivity of 6555 backedges. 0 proven. 6555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:16,733 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:16,733 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:16,740 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:58:16,811 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 58 check-sat command(s) [2018-09-30 23:58:16,811 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:16,815 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:16,850 INFO L134 CoverageAnalysis]: Checked inductivity of 6555 backedges. 0 proven. 6555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:16,870 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:16,870 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [115, 115] total 115 [2018-09-30 23:58:16,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 117 states [2018-09-30 23:58:16,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2018-09-30 23:58:16,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=13341, Unknown=0, NotChecked=0, Total=13572 [2018-09-30 23:58:16,871 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 117 states. [2018-09-30 23:58:25,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:25,296 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-09-30 23:58:25,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2018-09-30 23:58:25,296 INFO L78 Accepts]: Start accepts. Automaton has 117 states. Word has length 116 [2018-09-30 23:58:25,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:25,297 INFO L225 Difference]: With dead ends: 119 [2018-09-30 23:58:25,297 INFO L226 Difference]: Without dead ends: 118 [2018-09-30 23:58:25,297 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=231, Invalid=13341, Unknown=0, NotChecked=0, Total=13572 [2018-09-30 23:58:25,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-09-30 23:58:25,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-09-30 23:58:25,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-09-30 23:58:25,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2018-09-30 23:58:25,303 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 116 [2018-09-30 23:58:25,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:25,303 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2018-09-30 23:58:25,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has 117 states. [2018-09-30 23:58:25,303 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2018-09-30 23:58:25,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-09-30 23:58:25,303 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:25,303 INFO L375 BasicCegarLoop]: trace histogram [115, 1, 1] [2018-09-30 23:58:25,304 INFO L423 AbstractCegarLoop]: === Iteration 116 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:25,304 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:25,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1970439073, now seen corresponding path program 115 times [2018-09-30 23:58:25,304 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:25,304 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:25,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:25,304 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:25,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:25,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:31,932 INFO L134 CoverageAnalysis]: Checked inductivity of 6670 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:31,932 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:31,932 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:31,939 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:58:31,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:31,974 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:32,020 INFO L134 CoverageAnalysis]: Checked inductivity of 6670 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:32,051 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:32,052 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [116, 116] total 116 [2018-09-30 23:58:32,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-09-30 23:58:32,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-09-30 23:58:32,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=13573, Unknown=0, NotChecked=0, Total=13806 [2018-09-30 23:58:32,053 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 118 states. [2018-09-30 23:58:40,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:40,615 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2018-09-30 23:58:40,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2018-09-30 23:58:40,616 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 117 [2018-09-30 23:58:40,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:40,616 INFO L225 Difference]: With dead ends: 120 [2018-09-30 23:58:40,616 INFO L226 Difference]: Without dead ends: 119 [2018-09-30 23:58:40,617 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=233, Invalid=13573, Unknown=0, NotChecked=0, Total=13806 [2018-09-30 23:58:40,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-30 23:58:40,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-09-30 23:58:40,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-30 23:58:40,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-09-30 23:58:40,627 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 117 [2018-09-30 23:58:40,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:40,627 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-09-30 23:58:40,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-09-30 23:58:40,627 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-09-30 23:58:40,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-30 23:58:40,628 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:40,628 INFO L375 BasicCegarLoop]: trace histogram [116, 1, 1] [2018-09-30 23:58:40,628 INFO L423 AbstractCegarLoop]: === Iteration 117 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:40,628 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:40,628 INFO L82 PathProgramCache]: Analyzing trace with hash 954069063, now seen corresponding path program 116 times [2018-09-30 23:58:40,629 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:40,629 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:40,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:40,629 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:58:40,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:40,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:47,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6786 backedges. 0 proven. 6786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:47,359 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:47,359 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:47,365 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:58:47,402 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:58:47,402 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:47,406 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:47,441 INFO L134 CoverageAnalysis]: Checked inductivity of 6786 backedges. 0 proven. 6786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:47,461 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:47,462 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 117] total 117 [2018-09-30 23:58:47,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 119 states [2018-09-30 23:58:47,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2018-09-30 23:58:47,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=13807, Unknown=0, NotChecked=0, Total=14042 [2018-09-30 23:58:47,463 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 119 states. [2018-09-30 23:58:56,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:56,096 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-09-30 23:58:56,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2018-09-30 23:58:56,097 INFO L78 Accepts]: Start accepts. Automaton has 119 states. Word has length 118 [2018-09-30 23:58:56,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:56,097 INFO L225 Difference]: With dead ends: 121 [2018-09-30 23:58:56,098 INFO L226 Difference]: Without dead ends: 120 [2018-09-30 23:58:56,098 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=235, Invalid=13807, Unknown=0, NotChecked=0, Total=14042 [2018-09-30 23:58:56,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-09-30 23:58:56,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2018-09-30 23:58:56,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-09-30 23:58:56,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2018-09-30 23:58:56,103 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 118 [2018-09-30 23:58:56,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:56,103 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2018-09-30 23:58:56,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has 119 states. [2018-09-30 23:58:56,103 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2018-09-30 23:58:56,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-09-30 23:58:56,104 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:56,104 INFO L375 BasicCegarLoop]: trace histogram [117, 1, 1] [2018-09-30 23:58:56,104 INFO L423 AbstractCegarLoop]: === Iteration 118 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:56,104 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:56,104 INFO L82 PathProgramCache]: Analyzing trace with hash -488630175, now seen corresponding path program 117 times [2018-09-30 23:58:56,104 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:56,104 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:56,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:56,105 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:56,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:56,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:02,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6903 backedges. 0 proven. 6903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:02,860 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:02,860 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:02,868 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:59:02,943 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 60 check-sat command(s) [2018-09-30 23:59:02,943 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:02,947 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:02,977 INFO L134 CoverageAnalysis]: Checked inductivity of 6903 backedges. 0 proven. 6903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:02,998 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:02,998 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [118, 118] total 118 [2018-09-30 23:59:02,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-09-30 23:59:02,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-09-30 23:59:02,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=14043, Unknown=0, NotChecked=0, Total=14280 [2018-09-30 23:59:02,999 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand 120 states. [2018-09-30 23:59:11,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:11,802 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2018-09-30 23:59:11,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2018-09-30 23:59:11,802 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 119 [2018-09-30 23:59:11,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:11,803 INFO L225 Difference]: With dead ends: 122 [2018-09-30 23:59:11,803 INFO L226 Difference]: Without dead ends: 121 [2018-09-30 23:59:11,803 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=237, Invalid=14043, Unknown=0, NotChecked=0, Total=14280 [2018-09-30 23:59:11,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-09-30 23:59:11,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-09-30 23:59:11,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-09-30 23:59:11,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2018-09-30 23:59:11,807 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 119 [2018-09-30 23:59:11,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:11,807 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2018-09-30 23:59:11,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-09-30 23:59:11,807 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2018-09-30 23:59:11,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-09-30 23:59:11,808 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:11,808 INFO L375 BasicCegarLoop]: trace histogram [118, 1, 1] [2018-09-30 23:59:11,808 INFO L423 AbstractCegarLoop]: === Iteration 119 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:11,808 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:11,808 INFO L82 PathProgramCache]: Analyzing trace with hash 2032333703, now seen corresponding path program 118 times [2018-09-30 23:59:11,809 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:11,809 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:11,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:11,809 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:11,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:11,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:18,565 INFO L134 CoverageAnalysis]: Checked inductivity of 7021 backedges. 0 proven. 7021 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:18,566 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:18,566 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:18,573 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:59:18,609 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:59:18,610 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:18,614 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:18,648 INFO L134 CoverageAnalysis]: Checked inductivity of 7021 backedges. 0 proven. 7021 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:18,668 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:18,668 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [119, 119] total 119 [2018-09-30 23:59:18,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 121 states [2018-09-30 23:59:18,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2018-09-30 23:59:18,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=14281, Unknown=0, NotChecked=0, Total=14520 [2018-09-30 23:59:18,669 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 121 states. [2018-09-30 23:59:27,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:27,686 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-09-30 23:59:27,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-09-30 23:59:27,686 INFO L78 Accepts]: Start accepts. Automaton has 121 states. Word has length 120 [2018-09-30 23:59:27,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:27,687 INFO L225 Difference]: With dead ends: 123 [2018-09-30 23:59:27,687 INFO L226 Difference]: Without dead ends: 122 [2018-09-30 23:59:27,688 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=239, Invalid=14281, Unknown=0, NotChecked=0, Total=14520 [2018-09-30 23:59:27,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-09-30 23:59:27,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2018-09-30 23:59:27,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-09-30 23:59:27,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2018-09-30 23:59:27,692 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 120 [2018-09-30 23:59:27,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:27,692 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2018-09-30 23:59:27,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has 121 states. [2018-09-30 23:59:27,692 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2018-09-30 23:59:27,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-09-30 23:59:27,693 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:27,693 INFO L375 BasicCegarLoop]: trace histogram [119, 1, 1] [2018-09-30 23:59:27,693 INFO L423 AbstractCegarLoop]: === Iteration 120 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:27,693 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:27,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1422164703, now seen corresponding path program 119 times [2018-09-30 23:59:27,693 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:27,693 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:27,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:27,694 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:27,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:27,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:34,431 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:34,432 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:34,432 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:34,439 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:59:34,513 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 61 check-sat command(s) [2018-09-30 23:59:34,513 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:34,518 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:34,548 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:34,569 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:34,570 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [120, 120] total 120 [2018-09-30 23:59:34,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-09-30 23:59:34,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-09-30 23:59:34,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=14521, Unknown=0, NotChecked=0, Total=14762 [2018-09-30 23:59:34,571 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 122 states. [2018-09-30 23:59:43,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:43,792 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2018-09-30 23:59:43,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2018-09-30 23:59:43,792 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 121 [2018-09-30 23:59:43,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:43,793 INFO L225 Difference]: With dead ends: 124 [2018-09-30 23:59:43,793 INFO L226 Difference]: Without dead ends: 123 [2018-09-30 23:59:43,794 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=241, Invalid=14521, Unknown=0, NotChecked=0, Total=14762 [2018-09-30 23:59:43,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-30 23:59:43,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-09-30 23:59:43,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-09-30 23:59:43,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-09-30 23:59:43,800 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 121 [2018-09-30 23:59:43,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:43,800 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-09-30 23:59:43,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-09-30 23:59:43,801 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-09-30 23:59:43,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-30 23:59:43,801 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:43,801 INFO L375 BasicCegarLoop]: trace histogram [120, 1, 1] [2018-09-30 23:59:43,801 INFO L423 AbstractCegarLoop]: === Iteration 121 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:43,802 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:43,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1137432889, now seen corresponding path program 120 times [2018-09-30 23:59:43,802 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:43,802 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:43,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:43,803 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:43,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:43,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:50,625 INFO L134 CoverageAnalysis]: Checked inductivity of 7260 backedges. 0 proven. 7260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:50,626 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:50,626 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:50,634 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:59:50,707 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-09-30 23:59:50,707 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:50,711 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:50,747 INFO L134 CoverageAnalysis]: Checked inductivity of 7260 backedges. 0 proven. 7260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:50,769 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:50,769 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [121, 121] total 121 [2018-09-30 23:59:50,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 123 states [2018-09-30 23:59:50,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2018-09-30 23:59:50,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=14763, Unknown=0, NotChecked=0, Total=15006 [2018-09-30 23:59:50,770 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 123 states. [2018-10-01 00:00:00,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:00,110 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-10-01 00:00:00,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2018-10-01 00:00:00,110 INFO L78 Accepts]: Start accepts. Automaton has 123 states. Word has length 122 [2018-10-01 00:00:00,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:00,111 INFO L225 Difference]: With dead ends: 125 [2018-10-01 00:00:00,111 INFO L226 Difference]: Without dead ends: 124 [2018-10-01 00:00:00,112 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=243, Invalid=14763, Unknown=0, NotChecked=0, Total=15006 [2018-10-01 00:00:00,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-10-01 00:00:00,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2018-10-01 00:00:00,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-10-01 00:00:00,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2018-10-01 00:00:00,118 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 122 [2018-10-01 00:00:00,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:00,118 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2018-10-01 00:00:00,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has 123 states. [2018-10-01 00:00:00,119 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2018-10-01 00:00:00,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-10-01 00:00:00,119 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:00,119 INFO L375 BasicCegarLoop]: trace histogram [121, 1, 1] [2018-10-01 00:00:00,119 INFO L423 AbstractCegarLoop]: === Iteration 122 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:00,120 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:00,120 INFO L82 PathProgramCache]: Analyzing trace with hash -900681247, now seen corresponding path program 121 times [2018-10-01 00:00:00,120 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:00,120 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:00,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:00,121 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:00,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:00,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:07,290 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 7381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:07,290 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:07,290 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:07,299 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:00:07,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:07,340 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:07,376 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 7381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:07,396 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:07,396 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [122, 122] total 122 [2018-10-01 00:00:07,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-10-01 00:00:07,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-10-01 00:00:07,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=15007, Unknown=0, NotChecked=0, Total=15252 [2018-10-01 00:00:07,398 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 124 states. [2018-10-01 00:00:16,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:16,928 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2018-10-01 00:00:16,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2018-10-01 00:00:16,929 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 123 [2018-10-01 00:00:16,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:16,929 INFO L225 Difference]: With dead ends: 126 [2018-10-01 00:00:16,929 INFO L226 Difference]: Without dead ends: 125 [2018-10-01 00:00:16,930 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=245, Invalid=15007, Unknown=0, NotChecked=0, Total=15252 [2018-10-01 00:00:16,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-10-01 00:00:16,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-10-01 00:00:16,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-10-01 00:00:16,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2018-10-01 00:00:16,935 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 123 [2018-10-01 00:00:16,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:16,935 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2018-10-01 00:00:16,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-10-01 00:00:16,935 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2018-10-01 00:00:16,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-10-01 00:00:16,935 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:16,935 INFO L375 BasicCegarLoop]: trace histogram [122, 1, 1] [2018-10-01 00:00:16,936 INFO L423 AbstractCegarLoop]: === Iteration 123 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:16,936 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:16,936 INFO L82 PathProgramCache]: Analyzing trace with hash 2143652359, now seen corresponding path program 122 times [2018-10-01 00:00:16,936 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:16,936 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:16,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:16,936 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:00:16,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:16,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:24,366 INFO L134 CoverageAnalysis]: Checked inductivity of 7503 backedges. 0 proven. 7503 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:24,366 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:24,366 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:24,374 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:00:24,412 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:00:24,412 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:24,417 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:24,466 INFO L134 CoverageAnalysis]: Checked inductivity of 7503 backedges. 0 proven. 7503 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:24,486 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:24,487 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [123, 123] total 123 [2018-10-01 00:00:24,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 125 states [2018-10-01 00:00:24,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2018-10-01 00:00:24,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=15253, Unknown=0, NotChecked=0, Total=15500 [2018-10-01 00:00:24,487 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 125 states. [2018-10-01 00:00:34,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:34,110 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-10-01 00:00:34,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2018-10-01 00:00:34,110 INFO L78 Accepts]: Start accepts. Automaton has 125 states. Word has length 124 [2018-10-01 00:00:34,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:34,111 INFO L225 Difference]: With dead ends: 127 [2018-10-01 00:00:34,111 INFO L226 Difference]: Without dead ends: 126 [2018-10-01 00:00:34,112 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 122 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=247, Invalid=15253, Unknown=0, NotChecked=0, Total=15500 [2018-10-01 00:00:34,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-10-01 00:00:34,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2018-10-01 00:00:34,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-10-01 00:00:34,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2018-10-01 00:00:34,117 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 124 [2018-10-01 00:00:34,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:34,117 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2018-10-01 00:00:34,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has 125 states. [2018-10-01 00:00:34,117 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2018-10-01 00:00:34,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-10-01 00:00:34,118 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:34,118 INFO L375 BasicCegarLoop]: trace histogram [123, 1, 1] [2018-10-01 00:00:34,118 INFO L423 AbstractCegarLoop]: === Iteration 124 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:34,118 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:34,118 INFO L82 PathProgramCache]: Analyzing trace with hash 2028713633, now seen corresponding path program 123 times [2018-10-01 00:00:34,118 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:34,118 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:34,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:34,119 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:34,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:34,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:41,426 INFO L134 CoverageAnalysis]: Checked inductivity of 7626 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:41,427 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:41,427 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:41,434 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:00:41,513 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 63 check-sat command(s) [2018-10-01 00:00:41,513 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:41,518 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:41,558 INFO L134 CoverageAnalysis]: Checked inductivity of 7626 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:41,578 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:41,579 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [124, 124] total 124 [2018-10-01 00:00:41,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-10-01 00:00:41,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-10-01 00:00:41,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=15501, Unknown=0, NotChecked=0, Total=15750 [2018-10-01 00:00:41,579 INFO L87 Difference]: Start difference. First operand 126 states and 126 transitions. Second operand 126 states. [2018-10-01 00:00:51,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:51,419 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2018-10-01 00:00:51,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2018-10-01 00:00:51,420 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 125 [2018-10-01 00:00:51,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:51,420 INFO L225 Difference]: With dead ends: 128 [2018-10-01 00:00:51,420 INFO L226 Difference]: Without dead ends: 127 [2018-10-01 00:00:51,421 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 123 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=249, Invalid=15501, Unknown=0, NotChecked=0, Total=15750 [2018-10-01 00:00:51,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-10-01 00:00:51,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-10-01 00:00:51,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-10-01 00:00:51,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2018-10-01 00:00:51,426 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 125 [2018-10-01 00:00:51,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:51,426 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2018-10-01 00:00:51,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-10-01 00:00:51,426 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2018-10-01 00:00:51,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-10-01 00:00:51,427 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:51,427 INFO L375 BasicCegarLoop]: trace histogram [124, 1, 1] [2018-10-01 00:00:51,427 INFO L423 AbstractCegarLoop]: === Iteration 125 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:51,427 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:51,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1534386873, now seen corresponding path program 124 times [2018-10-01 00:00:51,427 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:51,427 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:51,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:51,428 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:51,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:51,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-10-01 00:00:56,374 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-01 00:00:56,378 WARN L206 ceAbstractionStarter]: Timeout [2018-10-01 00:00:56,378 INFO L202 PluginConnector]: Adding new model DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.10 12:00:56 BoogieIcfgContainer [2018-10-01 00:00:56,378 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-01 00:00:56,379 INFO L168 Benchmark]: Toolchain (without parser) took 774565.20 ms. Allocated memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: -456.1 MB). Free memory was 1.4 GB in the beginning and 844.2 MB in the end (delta: 602.5 MB). Peak memory consumption was 146.4 MB. Max. memory is 7.1 GB. [2018-10-01 00:00:56,381 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.18 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-01 00:00:56,381 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.63 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-01 00:00:56,381 INFO L168 Benchmark]: Boogie Preprocessor took 21.26 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-01 00:00:56,381 INFO L168 Benchmark]: RCFGBuilder took 229.61 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-01 00:00:56,382 INFO L168 Benchmark]: TraceAbstraction took 774271.90 ms. Allocated memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: -456.1 MB). Free memory was 1.4 GB in the beginning and 844.2 MB in the end (delta: 581.4 MB). Peak memory consumption was 125.3 MB. Max. memory is 7.1 GB. [2018-10-01 00:00:56,383 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.18 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 34.63 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 21.26 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 229.61 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 774271.90 ms. Allocated memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: -456.1 MB). Free memory was 1.4 GB in the beginning and 844.2 MB in the end (delta: 581.4 MB). Peak memory consumption was 125.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 21]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 21). Cancelled while BasicCegarLoop was analyzing trace of length 127 with TraceHistMax 124, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 103 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 5 locations, 1 error locations. TIMEOUT Result, 774.1s OverallTime, 125 OverallIterations, 124 TraceHistogramMax, 423.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 249 SDtfs, 2 SDslu, 1 SDs, 0 SdLazy, 658752 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 353.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15499 GetRequests, 7626 SyntacticMatches, 123 SemanticMatches, 7750 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 328.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=127occurred in iteration=124, 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: 0.5s AutomataMinimizationTime, 124 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 4.8s SatisfiabilityAnalysisTime, 334.1s InterpolantComputationTime, 15746 NumberOfCodeBlocks, 15746 NumberOfCodeBlocksAsserted, 2200 NumberOfCheckSat, 15499 ConstructedInterpolants, 0 QuantifiedInterpolants, 9005493 SizeOfPredicates, 0 NumberOfNonLiveVariables, 15867 ConjunctsInSsa, 15621 ConjunctsInUnsatCore, 247 InterpolantComputations, 1 PerfectInterpolantSequences, 0/635500 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/DivisibilityInterpolantRequired01-BackwardSuccess.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-01_00-00-56-392.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/DivisibilityInterpolantRequired01-BackwardSuccess.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-01_00-00-56-392.csv Completed graceful shutdown