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/20170319-ConjunctivePathPrograms/const1.i_3.bplTransformedIcfg_BEv2_6.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-133090d [2018-10-04 09:09:00,507 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-04 09:09:00,510 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-04 09:09:00,521 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-04 09:09:00,522 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-04 09:09:00,523 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-04 09:09:00,524 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-04 09:09:00,526 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-04 09:09:00,527 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-04 09:09:00,528 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-04 09:09:00,529 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-04 09:09:00,529 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-04 09:09:00,530 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-04 09:09:00,531 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-04 09:09:00,532 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-04 09:09:00,533 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-04 09:09:00,534 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-04 09:09:00,536 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-04 09:09:00,538 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-04 09:09:00,539 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-04 09:09:00,540 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-04 09:09:00,542 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-04 09:09:00,544 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-04 09:09:00,553 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-10-04 09:09:00,575 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-04 09:09:00,575 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-04 09:09:00,576 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-04 09:09:00,576 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-04 09:09:00,579 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-04 09:09:00,579 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-04 09:09:00,579 INFO L133 SettingsManager]: * Use SBE=true [2018-10-04 09:09:00,579 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-04 09:09:00,579 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-04 09:09:00,580 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-04 09:09:00,581 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-04 09:09:00,581 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-04 09:09:00,581 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-04 09:09:00,581 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-04 09:09:00,581 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-04 09:09:00,582 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-04 09:09:00,582 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-04 09:09:00,582 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-04 09:09:00,582 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-04 09:09:00,582 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-04 09:09:00,583 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-04 09:09:00,584 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-04 09:09:00,584 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 09:09:00,584 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-04 09:09:00,584 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-04 09:09:00,585 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-04 09:09:00,585 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-04 09:09:00,585 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-04 09:09:00,586 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-04 09:09:00,586 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-04 09:09:00,642 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-04 09:09:00,660 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-04 09:09:00,668 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-04 09:09:00,670 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-04 09:09:00,670 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-04 09:09:00,671 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/const1.i_3.bplTransformedIcfg_BEv2_6.bpl [2018-10-04 09:09:00,671 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/const1.i_3.bplTransformedIcfg_BEv2_6.bpl' [2018-10-04 09:09:00,731 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-04 09:09:00,733 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-04 09:09:00,734 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-04 09:09:00,734 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-04 09:09:00,734 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-04 09:09:00,757 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:09:00" (1/1) ... [2018-10-04 09:09:00,770 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:09:00" (1/1) ... [2018-10-04 09:09:00,778 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-04 09:09:00,779 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-04 09:09:00,779 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-04 09:09:00,779 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-04 09:09:00,792 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:09:00" (1/1) ... [2018-10-04 09:09:00,792 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:09:00" (1/1) ... [2018-10-04 09:09:00,793 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:09:00" (1/1) ... [2018-10-04 09:09:00,793 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:09:00" (1/1) ... [2018-10-04 09:09:00,797 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:09:00" (1/1) ... [2018-10-04 09:09:00,799 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:09:00" (1/1) ... [2018-10-04 09:09:00,800 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:09:00" (1/1) ... [2018-10-04 09:09:00,802 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-04 09:09:00,802 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-04 09:09:00,802 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-04 09:09:00,803 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-04 09:09:00,804 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:09:00" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 09:09:00,886 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-10-04 09:09:00,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-04 09:09:00,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-04 09:09:01,066 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-04 09:09:01,067 INFO L202 PluginConnector]: Adding new model const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 09:09:01 BoogieIcfgContainer [2018-10-04 09:09:01,067 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-04 09:09:01,069 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-04 09:09:01,069 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-04 09:09:01,072 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-04 09:09:01,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:09:00" (1/2) ... [2018-10-04 09:09:01,074 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c4e65e6 and model type const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 09:09:01, skipping insertion in model container [2018-10-04 09:09:01,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 09:09:01" (2/2) ... [2018-10-04 09:09:01,076 INFO L112 eAbstractionObserver]: Analyzing ICFG const1.i_3.bplTransformedIcfg_BEv2_6.bpl [2018-10-04 09:09:01,087 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-04 09:09:01,095 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-04 09:09:01,147 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-04 09:09:01,148 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-04 09:09:01,149 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-04 09:09:01,149 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-04 09:09:01,149 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-04 09:09:01,149 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-04 09:09:01,149 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-04 09:09:01,150 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-04 09:09:01,150 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-04 09:09:01,163 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-10-04 09:09:01,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-10-04 09:09:01,170 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:09:01,171 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-10-04 09:09:01,172 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:09:01,179 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:09:01,179 INFO L82 PathProgramCache]: Analyzing trace with hash 29955, now seen corresponding path program 1 times [2018-10-04 09:09:01,181 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:09:01,182 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:09:01,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:01,229 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:09:01,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:01,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:09:01,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:01,325 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 09:09:01,325 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-04 09:09:01,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-04 09:09:01,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-04 09:09:01,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-04 09:09:01,347 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-10-04 09:09:01,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:09:01,389 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2018-10-04 09:09:01,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-04 09:09:01,391 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-10-04 09:09:01,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:09:01,404 INFO L225 Difference]: With dead ends: 9 [2018-10-04 09:09:01,404 INFO L226 Difference]: Without dead ends: 5 [2018-10-04 09:09:01,411 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-04 09:09:01,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-10-04 09:09:01,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-10-04 09:09:01,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-10-04 09:09:01,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-10-04 09:09:01,447 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-10-04 09:09:01,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:09:01,448 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-10-04 09:09:01,448 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-04 09:09:01,448 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-10-04 09:09:01,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-04 09:09:01,449 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:09:01,449 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-10-04 09:09:01,449 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:09:01,449 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:09:01,450 INFO L82 PathProgramCache]: Analyzing trace with hash 930412, now seen corresponding path program 1 times [2018-10-04 09:09:01,450 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:09:01,450 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:09:01,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:01,452 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:09:01,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:01,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:09:01,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:01,562 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:09:01,562 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:09:01,580 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:09:01,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:09:01,617 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:09:01,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:01,685 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:09:01,685 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-10-04 09:09:01,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-04 09:09:01,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-04 09:09:01,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-04 09:09:01,687 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 4 states. [2018-10-04 09:09:01,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:09:01,748 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-10-04 09:09:01,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-04 09:09:01,750 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-10-04 09:09:01,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:09:01,751 INFO L225 Difference]: With dead ends: 8 [2018-10-04 09:09:01,752 INFO L226 Difference]: Without dead ends: 6 [2018-10-04 09:09:01,755 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-04 09:09:01,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-10-04 09:09:01,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-10-04 09:09:01,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-10-04 09:09:01,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-10-04 09:09:01,760 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-10-04 09:09:01,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:09:01,761 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-10-04 09:09:01,761 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-04 09:09:01,761 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-10-04 09:09:01,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-10-04 09:09:01,761 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:09:01,762 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-10-04 09:09:01,762 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:09:01,762 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:09:01,762 INFO L82 PathProgramCache]: Analyzing trace with hash 28844579, now seen corresponding path program 2 times [2018-10-04 09:09:01,763 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:09:01,763 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:09:01,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:01,765 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:09:01,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:01,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:09:01,865 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:01,866 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:09:01,866 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:09:01,875 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:09:01,894 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:09:01,894 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:09:01,895 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:09:01,901 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:01,921 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:09:01,921 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-04 09:09:01,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-04 09:09:01,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-04 09:09:01,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-04 09:09:01,922 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 5 states. [2018-10-04 09:09:01,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:09:01,979 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-10-04 09:09:01,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 09:09:01,979 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2018-10-04 09:09:01,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:09:01,980 INFO L225 Difference]: With dead ends: 9 [2018-10-04 09:09:01,980 INFO L226 Difference]: Without dead ends: 7 [2018-10-04 09:09:01,980 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-04 09:09:01,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-04 09:09:01,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-04 09:09:01,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-04 09:09:01,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-10-04 09:09:01,983 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-10-04 09:09:01,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:09:01,984 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-10-04 09:09:01,984 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-04 09:09:01,984 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-10-04 09:09:01,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-04 09:09:01,984 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:09:01,985 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2018-10-04 09:09:01,985 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:09:01,985 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:09:01,986 INFO L82 PathProgramCache]: Analyzing trace with hash 894183756, now seen corresponding path program 3 times [2018-10-04 09:09:01,986 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:09:01,986 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:09:01,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:01,987 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:09:01,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:01,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:09:02,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:02,102 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:09:02,103 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:09:02,118 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:09:02,132 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-04 09:09:02,132 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:09:02,136 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:09:02,144 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:02,165 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:09:02,165 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-04 09:09:02,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-04 09:09:02,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-04 09:09:02,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-04 09:09:02,167 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2018-10-04 09:09:02,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:09:02,222 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-10-04 09:09:02,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 09:09:02,222 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2018-10-04 09:09:02,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:09:02,223 INFO L225 Difference]: With dead ends: 10 [2018-10-04 09:09:02,223 INFO L226 Difference]: Without dead ends: 8 [2018-10-04 09:09:02,224 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-04 09:09:02,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-04 09:09:02,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-10-04 09:09:02,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-04 09:09:02,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-10-04 09:09:02,227 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-10-04 09:09:02,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:09:02,227 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-10-04 09:09:02,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-04 09:09:02,227 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-10-04 09:09:02,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-04 09:09:02,228 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:09:02,228 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1, 1] [2018-10-04 09:09:02,228 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:09:02,229 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:09:02,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1949894467, now seen corresponding path program 4 times [2018-10-04 09:09:02,229 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:09:02,229 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:09:02,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:02,230 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:09:02,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:02,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:09:02,514 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:02,514 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:09:02,514 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:09:02,522 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:09:02,539 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:09:02,540 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:09:02,541 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:09:02,548 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:02,569 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:09:02,570 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-04 09:09:02,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-04 09:09:02,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-04 09:09:02,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-04 09:09:02,571 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 7 states. [2018-10-04 09:09:02,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:09:02,660 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-04 09:09:02,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 09:09:02,660 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-10-04 09:09:02,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:09:02,661 INFO L225 Difference]: With dead ends: 11 [2018-10-04 09:09:02,661 INFO L226 Difference]: Without dead ends: 9 [2018-10-04 09:09:02,662 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-04 09:09:02,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-04 09:09:02,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-04 09:09:02,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-04 09:09:02,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-10-04 09:09:02,667 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-10-04 09:09:02,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:09:02,667 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-10-04 09:09:02,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-04 09:09:02,667 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-10-04 09:09:02,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-04 09:09:02,668 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:09:02,668 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1] [2018-10-04 09:09:02,668 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:09:02,669 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:09:02,669 INFO L82 PathProgramCache]: Analyzing trace with hash 317188140, now seen corresponding path program 5 times [2018-10-04 09:09:02,669 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:09:02,669 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:09:02,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:02,671 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:09:02,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:02,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:09:02,815 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:02,816 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:09:02,816 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:09:02,825 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:09:02,841 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-04 09:09:02,842 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:09:02,844 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:09:02,851 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:02,874 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:09:02,874 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 09:09:02,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 09:09:02,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 09:09:02,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:09:02,875 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 8 states. [2018-10-04 09:09:02,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:09:02,926 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-10-04 09:09:02,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 09:09:02,926 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2018-10-04 09:09:02,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:09:02,927 INFO L225 Difference]: With dead ends: 12 [2018-10-04 09:09:02,927 INFO L226 Difference]: Without dead ends: 10 [2018-10-04 09:09:02,928 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:09:02,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-04 09:09:02,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-04 09:09:02,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-04 09:09:02,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-10-04 09:09:02,931 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-10-04 09:09:02,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:09:02,931 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-10-04 09:09:02,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 09:09:02,932 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-10-04 09:09:02,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-04 09:09:02,932 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:09:02,932 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1, 1] [2018-10-04 09:09:02,933 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:09:02,933 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:09:02,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1242899555, now seen corresponding path program 6 times [2018-10-04 09:09:02,933 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:09:02,933 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:09:02,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:02,935 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:09:02,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:02,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:09:03,095 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:03,095 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:09:03,095 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:09:03,107 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:09:03,155 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-10-04 09:09:03,156 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:09:03,157 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:09:03,165 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:03,189 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:09:03,190 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:09:03,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:09:03,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:09:03,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:09:03,191 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 9 states. [2018-10-04 09:09:03,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:09:03,226 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-10-04 09:09:03,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:09:03,228 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2018-10-04 09:09:03,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:09:03,228 INFO L225 Difference]: With dead ends: 13 [2018-10-04 09:09:03,228 INFO L226 Difference]: Without dead ends: 11 [2018-10-04 09:09:03,229 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:09:03,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-04 09:09:03,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-04 09:09:03,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-04 09:09:03,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-04 09:09:03,232 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-10-04 09:09:03,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:09:03,233 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-04 09:09:03,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:09:03,233 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-04 09:09:03,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-04 09:09:03,233 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:09:03,234 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1, 1] [2018-10-04 09:09:03,234 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:09:03,234 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:09:03,234 INFO L82 PathProgramCache]: Analyzing trace with hash -124817652, now seen corresponding path program 7 times [2018-10-04 09:09:03,235 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:09:03,235 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:09:03,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:03,236 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:09:03,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:03,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:09:03,539 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:03,539 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:09:03,540 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:09:03,557 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:09:03,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:09:03,587 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:09:03,604 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:03,650 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:09:03,650 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:09:03,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:09:03,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:09:03,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:09:03,651 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-10-04 09:09:03,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:09:03,761 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-10-04 09:09:03,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:09:03,761 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2018-10-04 09:09:03,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:09:03,762 INFO L225 Difference]: With dead ends: 14 [2018-10-04 09:09:03,762 INFO L226 Difference]: Without dead ends: 12 [2018-10-04 09:09:03,763 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:09:03,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-04 09:09:03,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-04 09:09:03,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-04 09:09:03,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-10-04 09:09:03,766 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-10-04 09:09:03,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:09:03,767 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-10-04 09:09:03,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:09:03,767 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-10-04 09:09:03,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-04 09:09:03,767 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:09:03,768 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1, 1] [2018-10-04 09:09:03,768 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:09:03,768 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:09:03,768 INFO L82 PathProgramCache]: Analyzing trace with hash 425621891, now seen corresponding path program 8 times [2018-10-04 09:09:03,769 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:09:03,769 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:09:03,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:03,770 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:09:03,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:03,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:09:03,903 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:03,904 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:09:03,904 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:09:03,913 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:09:03,939 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:09:03,939 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:09:03,941 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:09:03,949 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:03,970 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:09:03,970 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:09:03,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:09:03,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:09:03,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:09:03,971 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 11 states. [2018-10-04 09:09:04,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:09:04,019 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-10-04 09:09:04,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:09:04,025 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2018-10-04 09:09:04,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:09:04,025 INFO L225 Difference]: With dead ends: 15 [2018-10-04 09:09:04,026 INFO L226 Difference]: Without dead ends: 13 [2018-10-04 09:09:04,026 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:09:04,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-04 09:09:04,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-04 09:09:04,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-04 09:09:04,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-10-04 09:09:04,029 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-10-04 09:09:04,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:09:04,029 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-10-04 09:09:04,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:09:04,029 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-10-04 09:09:04,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-04 09:09:04,030 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:09:04,030 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1, 1] [2018-10-04 09:09:04,030 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:09:04,031 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:09:04,031 INFO L82 PathProgramCache]: Analyzing trace with hash 309378540, now seen corresponding path program 9 times [2018-10-04 09:09:04,031 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:09:04,031 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:09:04,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:04,032 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:09:04,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:04,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:09:04,346 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:04,346 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:09:04,347 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:09:04,357 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:09:04,376 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-04 09:09:04,377 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:09:04,378 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:09:04,387 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:04,409 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:09:04,410 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-04 09:09:04,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-04 09:09:04,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-04 09:09:04,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-04 09:09:04,411 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 12 states. [2018-10-04 09:09:04,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:09:04,462 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-10-04 09:09:04,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-04 09:09:04,463 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2018-10-04 09:09:04,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:09:04,464 INFO L225 Difference]: With dead ends: 16 [2018-10-04 09:09:04,464 INFO L226 Difference]: Without dead ends: 14 [2018-10-04 09:09:04,464 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-04 09:09:04,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-04 09:09:04,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-04 09:09:04,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-04 09:09:04,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-04 09:09:04,467 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-10-04 09:09:04,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:09:04,468 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-04 09:09:04,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-04 09:09:04,468 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-04 09:09:04,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-04 09:09:04,468 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:09:04,469 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1, 1] [2018-10-04 09:09:04,469 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:09:04,469 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:09:04,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1000801955, now seen corresponding path program 10 times [2018-10-04 09:09:04,470 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:09:04,470 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:09:04,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:04,471 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:09:04,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:04,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:09:04,783 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:04,783 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:09:04,783 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:09:04,791 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:09:04,821 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:09:04,821 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:09:04,823 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:09:04,831 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:04,854 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:09:04,854 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-04 09:09:04,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-04 09:09:04,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-04 09:09:04,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-04 09:09:04,855 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 13 states. [2018-10-04 09:09:04,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:09:04,915 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-10-04 09:09:04,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-04 09:09:04,916 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 13 [2018-10-04 09:09:04,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:09:04,917 INFO L225 Difference]: With dead ends: 17 [2018-10-04 09:09:04,918 INFO L226 Difference]: Without dead ends: 15 [2018-10-04 09:09:04,918 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-04 09:09:04,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-04 09:09:04,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-04 09:09:04,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-04 09:09:04,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-04 09:09:04,923 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-10-04 09:09:04,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:09:04,923 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-04 09:09:04,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-04 09:09:04,923 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-04 09:09:04,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-04 09:09:04,924 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:09:04,924 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1, 1] [2018-10-04 09:09:04,924 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:09:04,924 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:09:04,924 INFO L82 PathProgramCache]: Analyzing trace with hash 960091340, now seen corresponding path program 11 times [2018-10-04 09:09:04,924 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:09:04,924 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:09:04,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:04,925 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:09:04,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:04,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:09:05,109 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:05,110 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:09:05,110 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:09:05,118 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:09:05,135 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-04 09:09:05,136 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:09:05,138 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:09:05,149 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:05,170 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:09:05,170 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-04 09:09:05,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 09:09:05,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 09:09:05,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-04 09:09:05,172 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 14 states. [2018-10-04 09:09:05,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:09:05,231 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-10-04 09:09:05,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-04 09:09:05,232 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-10-04 09:09:05,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:09:05,233 INFO L225 Difference]: With dead ends: 18 [2018-10-04 09:09:05,233 INFO L226 Difference]: Without dead ends: 16 [2018-10-04 09:09:05,234 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-04 09:09:05,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-04 09:09:05,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-04 09:09:05,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-04 09:09:05,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-10-04 09:09:05,238 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-10-04 09:09:05,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:09:05,238 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-10-04 09:09:05,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 09:09:05,238 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-10-04 09:09:05,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 09:09:05,239 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:09:05,239 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1, 1] [2018-10-04 09:09:05,239 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:09:05,239 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:09:05,239 INFO L82 PathProgramCache]: Analyzing trace with hash -301937725, now seen corresponding path program 12 times [2018-10-04 09:09:05,239 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:09:05,240 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:09:05,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:05,241 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:09:05,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:05,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:09:05,429 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:05,430 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:09:05,430 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:09:05,438 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:09:05,466 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-04 09:09:05,466 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:09:05,468 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:09:05,479 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:05,506 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:09:05,506 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-04 09:09:05,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-04 09:09:05,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-04 09:09:05,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-04 09:09:05,507 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 15 states. [2018-10-04 09:09:05,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:09:05,548 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-04 09:09:05,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-04 09:09:05,551 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-10-04 09:09:05,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:09:05,552 INFO L225 Difference]: With dead ends: 19 [2018-10-04 09:09:05,552 INFO L226 Difference]: Without dead ends: 17 [2018-10-04 09:09:05,552 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-04 09:09:05,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-04 09:09:05,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-04 09:09:05,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-04 09:09:05,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-04 09:09:05,556 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-10-04 09:09:05,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:09:05,556 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-04 09:09:05,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-04 09:09:05,556 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-04 09:09:05,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-04 09:09:05,557 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:09:05,557 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1, 1] [2018-10-04 09:09:05,557 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:09:05,557 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:09:05,557 INFO L82 PathProgramCache]: Analyzing trace with hash -770133076, now seen corresponding path program 13 times [2018-10-04 09:09:05,557 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:09:05,558 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:09:05,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:05,558 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:09:05,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:05,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:09:05,799 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:05,799 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:09:05,799 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:09:05,808 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:09:05,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:09:05,826 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:09:05,836 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:05,860 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:09:05,861 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-04 09:09:05,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-04 09:09:05,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-04 09:09:05,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-04 09:09:05,862 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 16 states. [2018-10-04 09:09:06,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:09:06,152 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-10-04 09:09:06,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-04 09:09:06,153 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2018-10-04 09:09:06,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:09:06,153 INFO L225 Difference]: With dead ends: 20 [2018-10-04 09:09:06,153 INFO L226 Difference]: Without dead ends: 18 [2018-10-04 09:09:06,154 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-04 09:09:06,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-04 09:09:06,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-04 09:09:06,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-04 09:09:06,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-04 09:09:06,157 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-10-04 09:09:06,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:09:06,158 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-04 09:09:06,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-04 09:09:06,158 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-04 09:09:06,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:09:06,159 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:09:06,159 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1, 1] [2018-10-04 09:09:06,159 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:09:06,159 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:09:06,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1895680227, now seen corresponding path program 14 times [2018-10-04 09:09:06,160 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:09:06,160 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:09:06,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:06,161 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:09:06,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:06,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:09:06,425 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:06,426 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:09:06,426 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:09:06,436 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:09:06,478 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:09:06,478 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:09:06,480 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:09:06,490 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:06,526 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:09:06,527 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-04 09:09:06,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-04 09:09:06,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-04 09:09:06,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-04 09:09:06,528 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 17 states. [2018-10-04 09:09:06,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:09:06,748 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-04 09:09:06,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-04 09:09:06,748 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2018-10-04 09:09:06,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:09:06,749 INFO L225 Difference]: With dead ends: 21 [2018-10-04 09:09:06,749 INFO L226 Difference]: Without dead ends: 19 [2018-10-04 09:09:06,749 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-04 09:09:06,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-04 09:09:06,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-04 09:09:06,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-04 09:09:06,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-04 09:09:06,753 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-10-04 09:09:06,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:09:06,753 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-04 09:09:06,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-04 09:09:06,754 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-04 09:09:06,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-04 09:09:06,754 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:09:06,754 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1, 1] [2018-10-04 09:09:06,755 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:09:06,755 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:09:06,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1363453300, now seen corresponding path program 15 times [2018-10-04 09:09:06,755 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:09:06,755 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:09:06,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:06,756 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:09:06,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:06,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:09:07,183 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:07,183 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:09:07,183 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:09:07,192 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:09:07,209 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-04 09:09:07,209 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:09:07,212 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:09:07,221 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:07,243 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:09:07,243 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-04 09:09:07,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-04 09:09:07,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-04 09:09:07,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-04 09:09:07,244 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 18 states. [2018-10-04 09:09:07,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:09:07,280 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-10-04 09:09:07,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-04 09:09:07,280 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-10-04 09:09:07,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:09:07,281 INFO L225 Difference]: With dead ends: 22 [2018-10-04 09:09:07,281 INFO L226 Difference]: Without dead ends: 20 [2018-10-04 09:09:07,282 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-04 09:09:07,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-04 09:09:07,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-04 09:09:07,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-04 09:09:07,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-10-04 09:09:07,285 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-10-04 09:09:07,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:09:07,285 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-10-04 09:09:07,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-04 09:09:07,285 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-10-04 09:09:07,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:09:07,286 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:09:07,286 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1, 1] [2018-10-04 09:09:07,286 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:09:07,286 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:09:07,286 INFO L82 PathProgramCache]: Analyzing trace with hash 682622467, now seen corresponding path program 16 times [2018-10-04 09:09:07,286 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:09:07,287 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:09:07,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:07,287 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:09:07,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:07,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:09:07,844 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:07,845 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:09:07,845 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:09:07,853 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:09:07,876 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:09:07,876 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:09:07,878 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:09:07,894 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:07,926 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:09:07,926 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-04 09:09:07,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-04 09:09:07,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-04 09:09:07,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-04 09:09:07,927 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 19 states. [2018-10-04 09:09:07,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:09:07,988 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-04 09:09:07,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-04 09:09:07,988 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2018-10-04 09:09:07,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:09:07,989 INFO L225 Difference]: With dead ends: 23 [2018-10-04 09:09:07,989 INFO L226 Difference]: Without dead ends: 21 [2018-10-04 09:09:07,990 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-04 09:09:07,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-04 09:09:07,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-04 09:09:07,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-04 09:09:07,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-04 09:09:07,993 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-10-04 09:09:07,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:09:07,993 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-04 09:09:07,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-04 09:09:07,993 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-04 09:09:07,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-04 09:09:07,994 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:09:07,994 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1, 1] [2018-10-04 09:09:07,994 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:09:07,995 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:09:07,995 INFO L82 PathProgramCache]: Analyzing trace with hash -313538196, now seen corresponding path program 17 times [2018-10-04 09:09:07,995 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:09:07,995 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:09:07,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:07,996 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:09:07,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:08,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:09:08,308 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:08,308 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:09:08,308 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:09:08,322 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:09:08,428 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-04 09:09:08,428 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:09:08,430 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:09:08,441 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:08,462 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:09:08,462 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-04 09:09:08,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 09:09:08,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 09:09:08,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-04 09:09:08,463 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 20 states. [2018-10-04 09:09:08,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:09:08,519 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-10-04 09:09:08,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-04 09:09:08,520 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2018-10-04 09:09:08,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:09:08,521 INFO L225 Difference]: With dead ends: 24 [2018-10-04 09:09:08,521 INFO L226 Difference]: Without dead ends: 22 [2018-10-04 09:09:08,522 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-04 09:09:08,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-04 09:09:08,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-04 09:09:08,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-04 09:09:08,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-10-04 09:09:08,525 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-10-04 09:09:08,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:09:08,526 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-10-04 09:09:08,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 09:09:08,526 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-10-04 09:09:08,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-04 09:09:08,527 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:09:08,527 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1, 1] [2018-10-04 09:09:08,527 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:09:08,527 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:09:08,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1129747677, now seen corresponding path program 18 times [2018-10-04 09:09:08,528 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:09:08,528 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:09:08,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:08,529 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:09:08,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:08,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:09:08,769 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:08,769 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:09:08,769 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:09:08,779 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:09:08,838 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-04 09:09:08,839 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:09:08,842 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:09:08,851 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:08,878 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:09:08,878 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-04 09:09:08,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-04 09:09:08,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-04 09:09:08,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-04 09:09:08,879 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 21 states. [2018-10-04 09:09:08,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:09:08,930 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-04 09:09:08,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-04 09:09:08,931 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 21 [2018-10-04 09:09:08,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:09:08,932 INFO L225 Difference]: With dead ends: 25 [2018-10-04 09:09:08,932 INFO L226 Difference]: Without dead ends: 23 [2018-10-04 09:09:08,933 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-04 09:09:08,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-04 09:09:08,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-04 09:09:08,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-04 09:09:08,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-04 09:09:08,937 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-10-04 09:09:08,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:09:08,937 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-04 09:09:08,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-04 09:09:08,938 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-04 09:09:08,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-04 09:09:08,938 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:09:08,938 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1, 1] [2018-10-04 09:09:08,939 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:09:08,939 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:09:08,939 INFO L82 PathProgramCache]: Analyzing trace with hash -662437812, now seen corresponding path program 19 times [2018-10-04 09:09:08,939 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:09:08,939 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:09:08,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:08,940 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:09:08,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:08,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:09:09,234 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:09,234 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:09:09,235 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:09:09,243 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:09:09,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:09:09,270 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:09:09,283 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:09,315 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:09:09,315 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-04 09:09:09,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-04 09:09:09,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-04 09:09:09,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-04 09:09:09,316 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 22 states. [2018-10-04 09:09:09,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:09:09,383 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-10-04 09:09:09,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-04 09:09:09,384 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2018-10-04 09:09:09,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:09:09,385 INFO L225 Difference]: With dead ends: 26 [2018-10-04 09:09:09,385 INFO L226 Difference]: Without dead ends: 24 [2018-10-04 09:09:09,386 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-04 09:09:09,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-04 09:09:09,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-04 09:09:09,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-04 09:09:09,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-10-04 09:09:09,389 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-10-04 09:09:09,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:09:09,390 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-10-04 09:09:09,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-04 09:09:09,390 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-10-04 09:09:09,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-04 09:09:09,390 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:09:09,391 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1, 1] [2018-10-04 09:09:09,391 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:09:09,391 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:09:09,391 INFO L82 PathProgramCache]: Analyzing trace with hash 939266115, now seen corresponding path program 20 times [2018-10-04 09:09:09,391 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:09:09,391 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:09:09,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:09,392 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:09:09,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:09,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:09:09,698 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:09,699 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:09:09,699 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:09:09,716 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:09:09,756 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:09:09,756 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:09:09,758 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:09:09,769 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:09,800 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:09:09,801 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-04 09:09:09,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-04 09:09:09,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-04 09:09:09,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-04 09:09:09,802 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 23 states. [2018-10-04 09:09:09,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:09:09,953 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-04 09:09:09,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-04 09:09:09,954 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 23 [2018-10-04 09:09:09,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:09:09,954 INFO L225 Difference]: With dead ends: 27 [2018-10-04 09:09:09,955 INFO L226 Difference]: Without dead ends: 25 [2018-10-04 09:09:09,955 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-04 09:09:09,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-04 09:09:09,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-04 09:09:09,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-04 09:09:09,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-10-04 09:09:09,958 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-10-04 09:09:09,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:09:09,958 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-10-04 09:09:09,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-04 09:09:09,958 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-10-04 09:09:09,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-04 09:09:09,959 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:09:09,959 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1, 1] [2018-10-04 09:09:09,959 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:09:09,959 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:09:09,960 INFO L82 PathProgramCache]: Analyzing trace with hash -947519700, now seen corresponding path program 21 times [2018-10-04 09:09:09,960 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:09:09,960 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:09:09,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:09,961 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:09:09,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:09,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:09:10,350 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:10,350 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:09:10,350 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:09:10,357 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:09:10,385 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-04 09:09:10,385 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:09:10,388 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:09:10,396 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:10,426 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:09:10,427 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-04 09:09:10,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-04 09:09:10,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-04 09:09:10,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-04 09:09:10,428 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 24 states. [2018-10-04 09:09:10,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:09:10,513 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-10-04 09:09:10,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-04 09:09:10,516 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 24 [2018-10-04 09:09:10,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:09:10,517 INFO L225 Difference]: With dead ends: 28 [2018-10-04 09:09:10,517 INFO L226 Difference]: Without dead ends: 26 [2018-10-04 09:09:10,517 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-04 09:09:10,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-04 09:09:10,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-10-04 09:09:10,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-04 09:09:10,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-10-04 09:09:10,522 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-10-04 09:09:10,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:09:10,522 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-10-04 09:09:10,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-04 09:09:10,522 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-10-04 09:09:10,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-04 09:09:10,523 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:09:10,523 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1, 1] [2018-10-04 09:09:10,523 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:09:10,523 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:09:10,523 INFO L82 PathProgramCache]: Analyzing trace with hash 691662179, now seen corresponding path program 22 times [2018-10-04 09:09:10,523 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:09:10,524 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:09:10,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:10,524 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:09:10,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:10,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:09:10,890 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:10,890 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:09:10,890 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:09:10,897 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:09:10,916 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:09:10,917 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:09:10,919 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:09:10,928 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:10,951 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:09:10,951 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-04 09:09:10,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-04 09:09:10,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-04 09:09:10,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-04 09:09:10,952 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 25 states. [2018-10-04 09:09:11,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:09:11,012 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-04 09:09:11,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-04 09:09:11,012 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 25 [2018-10-04 09:09:11,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:09:11,013 INFO L225 Difference]: With dead ends: 29 [2018-10-04 09:09:11,013 INFO L226 Difference]: Without dead ends: 27 [2018-10-04 09:09:11,014 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-04 09:09:11,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-04 09:09:11,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-04 09:09:11,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-04 09:09:11,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-04 09:09:11,018 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-10-04 09:09:11,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:09:11,018 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-04 09:09:11,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-04 09:09:11,019 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-04 09:09:11,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-04 09:09:11,019 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:09:11,019 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1, 1] [2018-10-04 09:09:11,020 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:09:11,020 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:09:11,020 INFO L82 PathProgramCache]: Analyzing trace with hash -33307124, now seen corresponding path program 23 times [2018-10-04 09:09:11,020 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:09:11,020 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:09:11,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:11,021 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:09:11,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:11,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:09:11,534 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:11,534 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:09:11,534 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:09:11,543 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:09:11,577 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-04 09:09:11,578 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:09:11,580 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:09:11,597 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:11,625 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:09:11,625 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-04 09:09:11,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-04 09:09:11,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-04 09:09:11,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-04 09:09:11,626 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 26 states. [2018-10-04 09:09:11,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:09:11,683 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-10-04 09:09:11,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-04 09:09:11,684 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 26 [2018-10-04 09:09:11,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:09:11,684 INFO L225 Difference]: With dead ends: 30 [2018-10-04 09:09:11,685 INFO L226 Difference]: Without dead ends: 28 [2018-10-04 09:09:11,686 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-04 09:09:11,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-04 09:09:11,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-10-04 09:09:11,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 09:09:11,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-10-04 09:09:11,690 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-10-04 09:09:11,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:09:11,690 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-10-04 09:09:11,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-04 09:09:11,690 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-10-04 09:09:11,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-04 09:09:11,691 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:09:11,691 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1, 1] [2018-10-04 09:09:11,691 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:09:11,691 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:09:11,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1032519037, now seen corresponding path program 24 times [2018-10-04 09:09:11,692 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:09:11,692 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:09:11,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:11,693 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:09:11,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:11,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:09:12,866 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:12,866 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:09:12,866 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:09:12,876 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:09:12,903 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-04 09:09:12,904 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:09:12,906 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:09:12,914 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:12,944 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:09:12,944 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-04 09:09:12,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-04 09:09:12,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-04 09:09:12,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-04 09:09:12,945 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 27 states. [2018-10-04 09:09:13,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:09:13,013 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-04 09:09:13,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-04 09:09:13,014 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 27 [2018-10-04 09:09:13,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:09:13,015 INFO L225 Difference]: With dead ends: 31 [2018-10-04 09:09:13,015 INFO L226 Difference]: Without dead ends: 29 [2018-10-04 09:09:13,016 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-04 09:09:13,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-04 09:09:13,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-04 09:09:13,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-04 09:09:13,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-04 09:09:13,020 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-10-04 09:09:13,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:09:13,020 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-04 09:09:13,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-04 09:09:13,020 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-04 09:09:13,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-04 09:09:13,021 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:09:13,021 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1, 1] [2018-10-04 09:09:13,021 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:09:13,021 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:09:13,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1943317268, now seen corresponding path program 25 times [2018-10-04 09:09:13,022 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:09:13,022 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:09:13,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:13,023 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:09:13,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:13,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:09:14,165 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:14,165 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:09:14,165 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:09:14,174 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:09:14,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:09:14,196 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:09:14,207 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:14,227 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:09:14,227 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-04 09:09:14,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-04 09:09:14,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-04 09:09:14,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-04 09:09:14,228 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 28 states. [2018-10-04 09:09:14,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:09:14,277 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-10-04 09:09:14,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-04 09:09:14,278 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 28 [2018-10-04 09:09:14,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:09:14,278 INFO L225 Difference]: With dead ends: 32 [2018-10-04 09:09:14,279 INFO L226 Difference]: Without dead ends: 30 [2018-10-04 09:09:14,279 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-04 09:09:14,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-04 09:09:14,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-10-04 09:09:14,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:09:14,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-10-04 09:09:14,283 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-10-04 09:09:14,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:09:14,283 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-10-04 09:09:14,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-04 09:09:14,283 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-10-04 09:09:14,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-04 09:09:14,284 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:09:14,284 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1, 1] [2018-10-04 09:09:14,284 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:09:14,284 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:09:14,284 INFO L82 PathProgramCache]: Analyzing trace with hash -113291357, now seen corresponding path program 26 times [2018-10-04 09:09:14,284 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:09:14,284 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:09:14,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:14,285 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:09:14,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:14,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:09:14,901 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:14,901 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:09:14,901 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:09:14,912 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:09:14,948 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:09:14,948 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:09:14,950 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:09:14,960 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:14,986 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:09:14,987 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-04 09:09:14,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-04 09:09:14,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-04 09:09:14,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-04 09:09:14,988 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 29 states. [2018-10-04 09:09:15,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:09:15,163 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-04 09:09:15,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-04 09:09:15,164 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 29 [2018-10-04 09:09:15,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:09:15,164 INFO L225 Difference]: With dead ends: 33 [2018-10-04 09:09:15,165 INFO L226 Difference]: Without dead ends: 31 [2018-10-04 09:09:15,165 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-04 09:09:15,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-04 09:09:15,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-04 09:09:15,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-04 09:09:15,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-10-04 09:09:15,168 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-10-04 09:09:15,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:09:15,170 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-10-04 09:09:15,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-04 09:09:15,171 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-10-04 09:09:15,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-04 09:09:15,171 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:09:15,171 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1, 1] [2018-10-04 09:09:15,171 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:09:15,171 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:09:15,172 INFO L82 PathProgramCache]: Analyzing trace with hash 782937036, now seen corresponding path program 27 times [2018-10-04 09:09:15,172 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:09:15,172 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:09:15,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:15,173 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:09:15,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:15,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:09:15,559 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:15,559 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:09:15,559 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:09:15,567 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:09:15,596 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-04 09:09:15,596 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:09:15,598 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:09:15,608 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:15,636 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:09:15,637 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-04 09:09:15,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-04 09:09:15,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-04 09:09:15,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-04 09:09:15,638 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 30 states. [2018-10-04 09:09:15,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:09:15,688 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-10-04 09:09:15,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-04 09:09:15,689 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 30 [2018-10-04 09:09:15,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:09:15,690 INFO L225 Difference]: With dead ends: 34 [2018-10-04 09:09:15,690 INFO L226 Difference]: Without dead ends: 32 [2018-10-04 09:09:15,691 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-04 09:09:15,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-04 09:09:15,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-10-04 09:09:15,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 09:09:15,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-10-04 09:09:15,695 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-10-04 09:09:15,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:09:15,695 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-10-04 09:09:15,695 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-04 09:09:15,695 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-10-04 09:09:15,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-04 09:09:15,695 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:09:15,696 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1, 1] [2018-10-04 09:09:15,696 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:09:15,696 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:09:15,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1498753853, now seen corresponding path program 28 times [2018-10-04 09:09:15,696 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:09:15,696 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:09:15,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:15,697 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:09:15,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:15,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:09:16,093 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:16,093 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:09:16,093 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:09:16,107 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:09:16,132 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:09:16,132 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:09:16,134 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:09:16,143 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:16,169 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:09:16,169 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-04 09:09:16,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-04 09:09:16,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-04 09:09:16,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-04 09:09:16,170 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 31 states. [2018-10-04 09:09:16,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:09:16,230 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-10-04 09:09:16,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-04 09:09:16,231 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 31 [2018-10-04 09:09:16,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:09:16,231 INFO L225 Difference]: With dead ends: 35 [2018-10-04 09:09:16,231 INFO L226 Difference]: Without dead ends: 33 [2018-10-04 09:09:16,232 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-04 09:09:16,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-04 09:09:16,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-04 09:09:16,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-04 09:09:16,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-10-04 09:09:16,236 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-10-04 09:09:16,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:09:16,237 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-10-04 09:09:16,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-04 09:09:16,237 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-10-04 09:09:16,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-04 09:09:16,237 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:09:16,237 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1, 1] [2018-10-04 09:09:16,238 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:09:16,238 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:09:16,238 INFO L82 PathProgramCache]: Analyzing trace with hash 783272620, now seen corresponding path program 29 times [2018-10-04 09:09:16,238 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:09:16,238 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:09:16,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:16,239 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:09:16,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:16,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:09:16,638 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:16,638 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:09:16,638 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:09:16,646 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:09:16,683 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-10-04 09:09:16,683 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:09:16,686 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:09:16,699 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:16,729 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:09:16,729 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-04 09:09:16,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-04 09:09:16,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-04 09:09:16,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-04 09:09:16,731 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 32 states. [2018-10-04 09:09:16,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:09:16,808 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-10-04 09:09:16,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-04 09:09:16,808 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 32 [2018-10-04 09:09:16,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:09:16,809 INFO L225 Difference]: With dead ends: 36 [2018-10-04 09:09:16,809 INFO L226 Difference]: Without dead ends: 34 [2018-10-04 09:09:16,810 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-04 09:09:16,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-04 09:09:16,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-10-04 09:09:16,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 09:09:16,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-10-04 09:09:16,814 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-10-04 09:09:16,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:09:16,814 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-10-04 09:09:16,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-04 09:09:16,814 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-10-04 09:09:16,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-04 09:09:16,815 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:09:16,815 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1, 1] [2018-10-04 09:09:16,815 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:09:16,815 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:09:16,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1488350749, now seen corresponding path program 30 times [2018-10-04 09:09:16,816 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:09:16,816 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:09:16,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:16,817 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:09:16,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:16,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:09:17,827 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:17,827 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:09:17,828 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:09:17,835 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:09:17,917 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-10-04 09:09:17,917 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:09:17,920 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:09:17,930 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:17,959 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:09:17,959 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-04 09:09:17,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-04 09:09:17,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-04 09:09:17,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-04 09:09:17,960 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 33 states. [2018-10-04 09:09:18,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:09:18,100 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-04 09:09:18,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-04 09:09:18,100 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 33 [2018-10-04 09:09:18,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:09:18,101 INFO L225 Difference]: With dead ends: 37 [2018-10-04 09:09:18,101 INFO L226 Difference]: Without dead ends: 35 [2018-10-04 09:09:18,102 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-04 09:09:18,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-04 09:09:18,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-04 09:09:18,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-04 09:09:18,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-04 09:09:18,104 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-10-04 09:09:18,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:09:18,106 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-04 09:09:18,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-04 09:09:18,106 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-04 09:09:18,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-04 09:09:18,106 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:09:18,106 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1, 1] [2018-10-04 09:09:18,107 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:09:18,107 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:09:18,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1105768844, now seen corresponding path program 31 times [2018-10-04 09:09:18,107 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:09:18,107 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:09:18,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:18,108 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:09:18,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:18,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:09:18,610 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:18,611 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:09:18,611 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:09:18,618 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:09:18,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:09:18,645 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:09:18,655 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:18,679 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:09:18,680 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-04 09:09:18,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-04 09:09:18,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-04 09:09:18,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-04 09:09:18,681 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 34 states. [2018-10-04 09:09:18,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:09:18,732 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-10-04 09:09:18,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-04 09:09:18,733 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 34 [2018-10-04 09:09:18,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:09:18,733 INFO L225 Difference]: With dead ends: 38 [2018-10-04 09:09:18,733 INFO L226 Difference]: Without dead ends: 36 [2018-10-04 09:09:18,734 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-04 09:09:18,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-04 09:09:18,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-10-04 09:09:18,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-04 09:09:18,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-10-04 09:09:18,737 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-10-04 09:09:18,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:09:18,737 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-10-04 09:09:18,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-04 09:09:18,737 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-10-04 09:09:18,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-04 09:09:18,738 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:09:18,738 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1, 1] [2018-10-04 09:09:18,738 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:09:18,738 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:09:18,738 INFO L82 PathProgramCache]: Analyzing trace with hash -80902397, now seen corresponding path program 32 times [2018-10-04 09:09:18,739 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:09:18,739 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:09:18,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:18,739 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:09:18,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:18,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:09:19,203 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:19,203 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:09:19,203 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:09:19,210 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:09:19,249 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:09:19,249 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:09:19,251 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:09:19,270 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:19,292 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:09:19,292 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-04 09:09:19,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-04 09:09:19,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-04 09:09:19,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-04 09:09:19,293 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 35 states. [2018-10-04 09:09:19,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:09:19,359 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-10-04 09:09:19,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-04 09:09:19,360 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 35 [2018-10-04 09:09:19,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:09:19,360 INFO L225 Difference]: With dead ends: 39 [2018-10-04 09:09:19,360 INFO L226 Difference]: Without dead ends: 37 [2018-10-04 09:09:19,361 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-04 09:09:19,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-04 09:09:19,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-04 09:09:19,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-04 09:09:19,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-10-04 09:09:19,365 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-10-04 09:09:19,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:09:19,365 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-10-04 09:09:19,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-04 09:09:19,365 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-10-04 09:09:19,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-04 09:09:19,366 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:09:19,366 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1, 1] [2018-10-04 09:09:19,366 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:09:19,366 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:09:19,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1786994796, now seen corresponding path program 33 times [2018-10-04 09:09:19,367 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:09:19,367 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:09:19,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:19,367 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:09:19,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:19,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:09:20,197 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:20,197 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:09:20,197 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:09:20,205 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:09:20,237 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-04 09:09:20,238 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:09:20,240 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:09:20,250 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:20,279 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:09:20,280 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-04 09:09:20,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-04 09:09:20,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-04 09:09:20,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-04 09:09:20,281 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 36 states. [2018-10-04 09:09:20,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:09:20,349 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-10-04 09:09:20,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-04 09:09:20,350 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 36 [2018-10-04 09:09:20,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:09:20,351 INFO L225 Difference]: With dead ends: 40 [2018-10-04 09:09:20,351 INFO L226 Difference]: Without dead ends: 38 [2018-10-04 09:09:20,352 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-04 09:09:20,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-04 09:09:20,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-10-04 09:09:20,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-04 09:09:20,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-10-04 09:09:20,355 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-10-04 09:09:20,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:09:20,355 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-10-04 09:09:20,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-04 09:09:20,355 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-10-04 09:09:20,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-04 09:09:20,355 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:09:20,355 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1, 1] [2018-10-04 09:09:20,356 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:09:20,356 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:09:20,356 INFO L82 PathProgramCache]: Analyzing trace with hash -437734365, now seen corresponding path program 34 times [2018-10-04 09:09:20,356 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:09:20,356 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:09:20,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:20,357 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:09:20,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:20,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:09:20,953 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:20,954 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:09:20,954 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:09:20,961 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:09:20,992 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:09:20,992 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:09:20,994 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:09:21,002 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:21,022 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:09:21,022 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-04 09:09:21,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-04 09:09:21,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-04 09:09:21,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-04 09:09:21,023 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 37 states. [2018-10-04 09:09:21,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:09:21,081 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-10-04 09:09:21,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-04 09:09:21,082 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 37 [2018-10-04 09:09:21,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:09:21,082 INFO L225 Difference]: With dead ends: 41 [2018-10-04 09:09:21,082 INFO L226 Difference]: Without dead ends: 39 [2018-10-04 09:09:21,084 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-04 09:09:21,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-04 09:09:21,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-04 09:09:21,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-04 09:09:21,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-10-04 09:09:21,086 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-10-04 09:09:21,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:09:21,086 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-10-04 09:09:21,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-04 09:09:21,087 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-10-04 09:09:21,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-04 09:09:21,087 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:09:21,087 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1, 1] [2018-10-04 09:09:21,087 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:09:21,088 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:09:21,088 INFO L82 PathProgramCache]: Analyzing trace with hash -684861620, now seen corresponding path program 35 times [2018-10-04 09:09:21,088 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:09:21,088 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:09:21,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:21,089 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:09:21,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:21,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:09:22,707 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:22,707 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:09:22,707 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:09:22,714 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:09:22,755 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-04 09:09:22,755 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:09:22,757 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:09:22,768 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:22,788 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:09:22,788 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-04 09:09:22,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-04 09:09:22,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-04 09:09:22,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-04 09:09:22,790 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 38 states. [2018-10-04 09:09:22,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:09:22,876 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-10-04 09:09:22,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-04 09:09:22,877 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 38 [2018-10-04 09:09:22,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:09:22,877 INFO L225 Difference]: With dead ends: 42 [2018-10-04 09:09:22,877 INFO L226 Difference]: Without dead ends: 40 [2018-10-04 09:09:22,878 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-04 09:09:22,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-04 09:09:22,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-10-04 09:09:22,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-04 09:09:22,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-10-04 09:09:22,880 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-10-04 09:09:22,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:09:22,880 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-10-04 09:09:22,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-04 09:09:22,880 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-10-04 09:09:22,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-04 09:09:22,880 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:09:22,881 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1, 1] [2018-10-04 09:09:22,881 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:09:22,881 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:09:22,881 INFO L82 PathProgramCache]: Analyzing trace with hash 244128067, now seen corresponding path program 36 times [2018-10-04 09:09:22,881 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:09:22,881 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:09:22,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:22,882 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:09:22,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:22,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:09:23,690 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:23,691 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:09:23,691 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:09:23,699 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:09:23,739 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-04 09:09:23,739 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:09:23,741 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:09:23,753 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:23,782 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:09:23,782 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-04 09:09:23,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-04 09:09:23,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-04 09:09:23,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-04 09:09:23,784 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 39 states. [2018-10-04 09:09:23,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:09:23,840 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-04 09:09:23,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-04 09:09:23,841 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 39 [2018-10-04 09:09:23,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:09:23,842 INFO L225 Difference]: With dead ends: 43 [2018-10-04 09:09:23,842 INFO L226 Difference]: Without dead ends: 41 [2018-10-04 09:09:23,843 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-04 09:09:23,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-04 09:09:23,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-04 09:09:23,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-04 09:09:23,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-10-04 09:09:23,845 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-10-04 09:09:23,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:09:23,846 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-10-04 09:09:23,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-04 09:09:23,846 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-10-04 09:09:23,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-04 09:09:23,846 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:09:23,846 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1, 1] [2018-10-04 09:09:23,847 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:09:23,847 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:09:23,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1021962708, now seen corresponding path program 37 times [2018-10-04 09:09:23,847 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:09:23,847 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:09:23,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:23,848 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:09:23,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:23,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:09:25,387 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:25,387 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:09:25,387 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:09:25,394 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:09:25,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:09:25,428 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:09:25,438 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:25,459 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:09:25,459 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-04 09:09:25,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-04 09:09:25,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-04 09:09:25,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-04 09:09:25,460 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 40 states. [2018-10-04 09:09:25,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:09:25,523 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-10-04 09:09:25,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-04 09:09:25,523 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 40 [2018-10-04 09:09:25,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:09:25,524 INFO L225 Difference]: With dead ends: 44 [2018-10-04 09:09:25,524 INFO L226 Difference]: Without dead ends: 42 [2018-10-04 09:09:25,525 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-04 09:09:25,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-04 09:09:25,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-10-04 09:09:25,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-04 09:09:25,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-10-04 09:09:25,528 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-10-04 09:09:25,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:09:25,528 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-10-04 09:09:25,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-04 09:09:25,528 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-10-04 09:09:25,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-04 09:09:25,529 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:09:25,529 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1, 1] [2018-10-04 09:09:25,529 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:09:25,529 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:09:25,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1616071069, now seen corresponding path program 38 times [2018-10-04 09:09:25,529 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:09:25,529 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:09:25,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:25,530 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:09:25,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:25,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:09:26,337 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:26,338 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:09:26,338 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:09:26,345 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:09:26,377 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:09:26,377 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:09:26,379 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:09:26,390 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:26,420 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:09:26,420 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-04 09:09:26,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-04 09:09:26,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-04 09:09:26,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-04 09:09:26,422 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 41 states. [2018-10-04 09:09:26,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:09:26,677 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-10-04 09:09:26,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-04 09:09:26,677 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 41 [2018-10-04 09:09:26,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:09:26,678 INFO L225 Difference]: With dead ends: 45 [2018-10-04 09:09:26,678 INFO L226 Difference]: Without dead ends: 43 [2018-10-04 09:09:26,679 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-04 09:09:26,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-04 09:09:26,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-04 09:09:26,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-04 09:09:26,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-10-04 09:09:26,682 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-10-04 09:09:26,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:09:26,683 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-10-04 09:09:26,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-04 09:09:26,683 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-10-04 09:09:26,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-04 09:09:26,683 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:09:26,684 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1, 1] [2018-10-04 09:09:26,684 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:09:26,684 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:09:26,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1441406220, now seen corresponding path program 39 times [2018-10-04 09:09:26,684 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:09:26,684 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:09:26,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:26,685 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:09:26,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:26,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:09:27,636 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:27,636 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:09:27,636 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:09:27,643 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:09:27,685 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-10-04 09:09:27,686 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:09:27,687 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:09:27,698 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:27,727 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:09:27,727 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-04 09:09:27,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-04 09:09:27,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-04 09:09:27,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-04 09:09:27,729 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 42 states. [2018-10-04 09:09:28,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:09:28,565 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-10-04 09:09:28,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-04 09:09:28,565 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 42 [2018-10-04 09:09:28,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:09:28,566 INFO L225 Difference]: With dead ends: 46 [2018-10-04 09:09:28,566 INFO L226 Difference]: Without dead ends: 44 [2018-10-04 09:09:28,567 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-04 09:09:28,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-04 09:09:28,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-10-04 09:09:28,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-04 09:09:28,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-10-04 09:09:28,569 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-10-04 09:09:28,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:09:28,569 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-10-04 09:09:28,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-04 09:09:28,569 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-10-04 09:09:28,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-04 09:09:28,570 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:09:28,570 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1, 1] [2018-10-04 09:09:28,570 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:09:28,571 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:09:28,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1733921667, now seen corresponding path program 40 times [2018-10-04 09:09:28,571 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:09:28,571 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:09:28,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:28,572 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:09:28,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:28,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:09:29,978 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:29,979 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:09:29,979 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:09:29,986 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:09:30,042 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:09:30,042 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:09:30,045 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:09:30,056 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:30,087 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:09:30,087 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-04 09:09:30,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-04 09:09:30,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-04 09:09:30,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-04 09:09:30,089 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 43 states. [2018-10-04 09:09:30,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:09:30,239 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-10-04 09:09:30,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-04 09:09:30,240 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 43 [2018-10-04 09:09:30,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:09:30,240 INFO L225 Difference]: With dead ends: 47 [2018-10-04 09:09:30,240 INFO L226 Difference]: Without dead ends: 45 [2018-10-04 09:09:30,241 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-04 09:09:30,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-04 09:09:30,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-04 09:09:30,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-04 09:09:30,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-10-04 09:09:30,244 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-10-04 09:09:30,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:09:30,244 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-10-04 09:09:30,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-04 09:09:30,244 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-10-04 09:09:30,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-04 09:09:30,244 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:09:30,245 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1, 1] [2018-10-04 09:09:30,245 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:09:30,245 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:09:30,245 INFO L82 PathProgramCache]: Analyzing trace with hash -2083001364, now seen corresponding path program 41 times [2018-10-04 09:09:30,245 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:09:30,245 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:09:30,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:30,246 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:09:30,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:30,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:09:31,134 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:31,135 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:09:31,135 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:09:31,141 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:09:31,184 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-10-04 09:09:31,184 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:09:31,186 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:09:31,195 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:31,215 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:09:31,215 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-04 09:09:31,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-04 09:09:31,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-04 09:09:31,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-04 09:09:31,216 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 44 states. [2018-10-04 09:09:31,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:09:31,269 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-10-04 09:09:31,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-04 09:09:31,269 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 44 [2018-10-04 09:09:31,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:09:31,270 INFO L225 Difference]: With dead ends: 48 [2018-10-04 09:09:31,270 INFO L226 Difference]: Without dead ends: 46 [2018-10-04 09:09:31,271 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-04 09:09:31,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-04 09:09:31,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-10-04 09:09:31,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-04 09:09:31,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-10-04 09:09:31,274 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-10-04 09:09:31,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:09:31,274 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-10-04 09:09:31,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-04 09:09:31,274 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-10-04 09:09:31,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-10-04 09:09:31,274 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:09:31,274 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1, 1] [2018-10-04 09:09:31,275 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:09:31,275 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:09:31,275 INFO L82 PathProgramCache]: Analyzing trace with hash -148531037, now seen corresponding path program 42 times [2018-10-04 09:09:31,275 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:09:31,275 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:09:31,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:31,276 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:09:31,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:31,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:09:32,155 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:32,156 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:09:32,156 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:09:32,163 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:09:32,202 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-10-04 09:09:32,202 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:09:32,204 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:09:32,216 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:32,235 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:09:32,236 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-04 09:09:32,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-04 09:09:32,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-04 09:09:32,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-04 09:09:32,237 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 45 states. [2018-10-04 09:09:32,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:09:32,314 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-10-04 09:09:32,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-04 09:09:32,315 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 45 [2018-10-04 09:09:32,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:09:32,315 INFO L225 Difference]: With dead ends: 49 [2018-10-04 09:09:32,316 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 09:09:32,317 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-04 09:09:32,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 09:09:32,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-04 09:09:32,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-04 09:09:32,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-10-04 09:09:32,320 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-10-04 09:09:32,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:09:32,320 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-10-04 09:09:32,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-04 09:09:32,320 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-10-04 09:09:32,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-04 09:09:32,321 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:09:32,321 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1, 1] [2018-10-04 09:09:32,321 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:09:32,321 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:09:32,321 INFO L82 PathProgramCache]: Analyzing trace with hash -309493044, now seen corresponding path program 43 times [2018-10-04 09:09:32,321 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:09:32,321 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:09:32,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:32,323 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:09:32,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:32,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:09:33,329 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:33,330 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:09:33,330 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:09:33,337 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:09:33,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:09:33,381 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:09:33,392 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:33,412 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:09:33,412 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-04 09:09:33,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-04 09:09:33,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-04 09:09:33,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-04 09:09:33,413 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 46 states. [2018-10-04 09:09:33,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:09:33,542 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-10-04 09:09:33,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-04 09:09:33,543 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 46 [2018-10-04 09:09:33,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:09:33,544 INFO L225 Difference]: With dead ends: 50 [2018-10-04 09:09:33,544 INFO L226 Difference]: Without dead ends: 48 [2018-10-04 09:09:33,544 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-04 09:09:33,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-04 09:09:33,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-10-04 09:09:33,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-04 09:09:33,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-10-04 09:09:33,547 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-10-04 09:09:33,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:09:33,547 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-10-04 09:09:33,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-04 09:09:33,547 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-10-04 09:09:33,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-04 09:09:33,548 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:09:33,548 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1, 1] [2018-10-04 09:09:33,548 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:09:33,548 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:09:33,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1004347965, now seen corresponding path program 44 times [2018-10-04 09:09:33,548 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:09:33,548 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:09:33,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:33,549 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:09:33,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:33,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:09:34,523 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:34,523 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:09:34,523 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:09:34,545 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:09:34,580 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:09:34,580 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:09:34,582 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:09:34,595 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:34,614 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:09:34,614 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-04 09:09:34,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-04 09:09:34,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-04 09:09:34,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-04 09:09:34,615 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 47 states. [2018-10-04 09:09:34,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:09:34,673 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-10-04 09:09:34,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-04 09:09:34,673 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 47 [2018-10-04 09:09:34,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:09:34,674 INFO L225 Difference]: With dead ends: 51 [2018-10-04 09:09:34,674 INFO L226 Difference]: Without dead ends: 49 [2018-10-04 09:09:34,675 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-04 09:09:34,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-04 09:09:34,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-04 09:09:34,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-04 09:09:34,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-10-04 09:09:34,678 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-10-04 09:09:34,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:09:34,678 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-10-04 09:09:34,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-04 09:09:34,678 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-10-04 09:09:34,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-04 09:09:34,678 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:09:34,679 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1, 1] [2018-10-04 09:09:34,679 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:09:34,679 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:09:34,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1070014036, now seen corresponding path program 45 times [2018-10-04 09:09:34,679 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:09:34,679 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:09:34,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:34,680 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:09:34,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:34,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:09:35,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:35,635 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:09:35,635 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:09:35,644 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:09:35,686 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-10-04 09:09:35,686 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:09:35,688 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:09:35,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:35,726 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:09:35,726 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-04 09:09:35,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-04 09:09:35,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-04 09:09:35,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-04 09:09:35,727 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 48 states. [2018-10-04 09:09:36,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:09:36,010 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-10-04 09:09:36,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-04 09:09:36,010 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 48 [2018-10-04 09:09:36,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:09:36,011 INFO L225 Difference]: With dead ends: 52 [2018-10-04 09:09:36,011 INFO L226 Difference]: Without dead ends: 50 [2018-10-04 09:09:36,011 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-04 09:09:36,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-04 09:09:36,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-10-04 09:09:36,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-04 09:09:36,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-10-04 09:09:36,014 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-10-04 09:09:36,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:09:36,014 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-10-04 09:09:36,014 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-04 09:09:36,015 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-10-04 09:09:36,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-04 09:09:36,015 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:09:36,015 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1, 1] [2018-10-04 09:09:36,015 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:09:36,015 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:09:36,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1189305059, now seen corresponding path program 46 times [2018-10-04 09:09:36,015 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:09:36,016 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:09:36,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:36,017 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:09:36,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:36,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:09:37,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:37,025 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:09:37,025 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:09:37,033 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:09:37,072 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:09:37,072 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:09:37,074 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:09:37,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:37,114 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:09:37,114 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-10-04 09:09:37,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-04 09:09:37,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-04 09:09:37,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-04 09:09:37,115 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 49 states. [2018-10-04 09:09:37,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:09:37,190 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-10-04 09:09:37,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-04 09:09:37,191 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 49 [2018-10-04 09:09:37,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:09:37,192 INFO L225 Difference]: With dead ends: 53 [2018-10-04 09:09:37,192 INFO L226 Difference]: Without dead ends: 51 [2018-10-04 09:09:37,193 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-04 09:09:37,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-04 09:09:37,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-04 09:09:37,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-04 09:09:37,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-10-04 09:09:37,195 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-10-04 09:09:37,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:09:37,195 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-10-04 09:09:37,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-04 09:09:37,196 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-10-04 09:09:37,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-04 09:09:37,196 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:09:37,196 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1, 1] [2018-10-04 09:09:37,196 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:09:37,196 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:09:37,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1786247028, now seen corresponding path program 47 times [2018-10-04 09:09:37,197 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:09:37,197 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:09:37,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:37,197 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:09:37,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:37,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:09:38,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:38,502 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:09:38,502 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:09:38,508 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:09:38,556 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-10-04 09:09:38,556 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:09:38,558 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:09:38,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:38,598 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:09:38,598 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-04 09:09:38,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-04 09:09:38,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-04 09:09:38,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-04 09:09:38,599 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 50 states. [2018-10-04 09:09:38,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:09:38,708 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-10-04 09:09:38,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-04 09:09:38,709 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 50 [2018-10-04 09:09:38,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:09:38,710 INFO L225 Difference]: With dead ends: 54 [2018-10-04 09:09:38,710 INFO L226 Difference]: Without dead ends: 52 [2018-10-04 09:09:38,711 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-04 09:09:38,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-10-04 09:09:38,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-10-04 09:09:38,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-04 09:09:38,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-10-04 09:09:38,714 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-10-04 09:09:38,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:09:38,714 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-10-04 09:09:38,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-04 09:09:38,714 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-10-04 09:09:38,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-04 09:09:38,715 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:09:38,715 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1, 1] [2018-10-04 09:09:38,715 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:09:38,715 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:09:38,715 INFO L82 PathProgramCache]: Analyzing trace with hash 460918787, now seen corresponding path program 48 times [2018-10-04 09:09:38,716 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:09:38,716 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:09:38,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:38,716 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:09:38,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:38,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:09:39,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:39,930 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:09:39,930 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:09:39,937 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:09:39,984 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-04 09:09:39,985 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:09:39,987 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:09:39,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:40,018 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:09:40,019 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-04 09:09:40,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-04 09:09:40,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-04 09:09:40,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-04 09:09:40,019 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 51 states. [2018-10-04 09:09:40,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:09:40,112 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-10-04 09:09:40,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-04 09:09:40,113 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 51 [2018-10-04 09:09:40,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:09:40,114 INFO L225 Difference]: With dead ends: 55 [2018-10-04 09:09:40,114 INFO L226 Difference]: Without dead ends: 53 [2018-10-04 09:09:40,114 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-04 09:09:40,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-04 09:09:40,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-04 09:09:40,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-04 09:09:40,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-10-04 09:09:40,116 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-10-04 09:09:40,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:09:40,117 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-10-04 09:09:40,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-04 09:09:40,117 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-10-04 09:09:40,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-04 09:09:40,117 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:09:40,117 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1, 1] [2018-10-04 09:09:40,117 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:09:40,117 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:09:40,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1403582316, now seen corresponding path program 49 times [2018-10-04 09:09:40,118 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:09:40,118 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:09:40,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:40,118 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:09:40,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:40,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:09:41,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:41,270 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:09:41,270 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:09:41,277 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:09:41,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:09:41,326 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:09:41,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:41,369 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:09:41,369 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-04 09:09:41,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-04 09:09:41,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-04 09:09:41,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-04 09:09:41,370 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 52 states. [2018-10-04 09:09:41,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:09:41,467 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-10-04 09:09:41,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-04 09:09:41,468 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 52 [2018-10-04 09:09:41,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:09:41,469 INFO L225 Difference]: With dead ends: 56 [2018-10-04 09:09:41,469 INFO L226 Difference]: Without dead ends: 54 [2018-10-04 09:09:41,469 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-04 09:09:41,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-04 09:09:41,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-10-04 09:09:41,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-04 09:09:41,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-10-04 09:09:41,473 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-10-04 09:09:41,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:09:41,473 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-10-04 09:09:41,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-04 09:09:41,473 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-10-04 09:09:41,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-04 09:09:41,474 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:09:41,474 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1, 1] [2018-10-04 09:09:41,474 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:09:41,474 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:09:41,474 INFO L82 PathProgramCache]: Analyzing trace with hash 561380643, now seen corresponding path program 50 times [2018-10-04 09:09:41,475 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:09:41,475 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:09:41,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:41,475 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:09:41,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:41,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:09:42,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:42,486 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:09:42,486 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:09:42,493 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:09:42,553 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:09:42,553 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:09:42,556 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:09:42,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:42,602 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:09:42,602 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-04 09:09:42,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-04 09:09:42,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-04 09:09:42,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-04 09:09:42,603 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 53 states. [2018-10-04 09:09:42,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:09:42,787 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-10-04 09:09:42,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-04 09:09:42,787 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 53 [2018-10-04 09:09:42,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:09:42,788 INFO L225 Difference]: With dead ends: 57 [2018-10-04 09:09:42,788 INFO L226 Difference]: Without dead ends: 55 [2018-10-04 09:09:42,789 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-04 09:09:42,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-04 09:09:42,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-10-04 09:09:42,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-04 09:09:42,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-10-04 09:09:42,790 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-10-04 09:09:42,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:09:42,791 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-10-04 09:09:42,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-04 09:09:42,791 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-10-04 09:09:42,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-04 09:09:42,791 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:09:42,791 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1, 1] [2018-10-04 09:09:42,792 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:09:42,792 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:09:42,792 INFO L82 PathProgramCache]: Analyzing trace with hash 222932556, now seen corresponding path program 51 times [2018-10-04 09:09:42,792 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:09:42,792 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:09:42,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:42,793 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:09:42,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:42,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:09:43,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:43,958 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:09:43,958 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:09:43,965 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:09:44,014 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-10-04 09:09:44,014 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:09:44,016 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:09:44,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:44,056 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:09:44,056 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-04 09:09:44,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-04 09:09:44,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-04 09:09:44,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-04 09:09:44,058 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 54 states. [2018-10-04 09:09:44,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:09:44,341 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-10-04 09:09:44,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-04 09:09:44,341 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 54 [2018-10-04 09:09:44,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:09:44,342 INFO L225 Difference]: With dead ends: 58 [2018-10-04 09:09:44,342 INFO L226 Difference]: Without dead ends: 56 [2018-10-04 09:09:44,342 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-04 09:09:44,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-04 09:09:44,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-10-04 09:09:44,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-04 09:09:44,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-10-04 09:09:44,345 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-10-04 09:09:44,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:09:44,345 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-10-04 09:09:44,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-04 09:09:44,345 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-10-04 09:09:44,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-04 09:09:44,346 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:09:44,346 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1, 1] [2018-10-04 09:09:44,346 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:09:44,347 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:09:44,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1679023549, now seen corresponding path program 52 times [2018-10-04 09:09:44,347 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:09:44,347 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:09:44,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:44,348 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:09:44,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:44,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:09:45,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:45,518 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:09:45,518 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:09:45,525 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:09:45,568 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:09:45,568 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:09:45,570 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:09:45,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:45,606 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:09:45,606 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-04 09:09:45,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-04 09:09:45,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-04 09:09:45,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-04 09:09:45,607 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 55 states. [2018-10-04 09:09:45,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:09:45,701 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-10-04 09:09:45,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-04 09:09:45,701 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 55 [2018-10-04 09:09:45,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:09:45,702 INFO L225 Difference]: With dead ends: 59 [2018-10-04 09:09:45,702 INFO L226 Difference]: Without dead ends: 57 [2018-10-04 09:09:45,704 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-04 09:09:45,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-04 09:09:45,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-04 09:09:45,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-04 09:09:45,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-10-04 09:09:45,706 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-10-04 09:09:45,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:09:45,706 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-10-04 09:09:45,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-04 09:09:45,706 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-10-04 09:09:45,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-04 09:09:45,707 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:09:45,707 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1, 1] [2018-10-04 09:09:45,707 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:09:45,707 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:09:45,707 INFO L82 PathProgramCache]: Analyzing trace with hash -510120660, now seen corresponding path program 53 times [2018-10-04 09:09:45,708 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:09:45,708 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:09:45,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:45,708 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:09:45,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:45,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:09:47,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:47,019 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:09:47,019 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:09:47,027 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:09:47,080 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-10-04 09:09:47,080 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:09:47,083 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:09:47,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:47,124 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:09:47,124 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-04 09:09:47,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-04 09:09:47,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-04 09:09:47,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-04 09:09:47,126 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 56 states. [2018-10-04 09:09:47,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:09:47,207 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-10-04 09:09:47,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-04 09:09:47,207 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 56 [2018-10-04 09:09:47,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:09:47,208 INFO L225 Difference]: With dead ends: 60 [2018-10-04 09:09:47,208 INFO L226 Difference]: Without dead ends: 58 [2018-10-04 09:09:47,209 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-04 09:09:47,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-10-04 09:09:47,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-10-04 09:09:47,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-04 09:09:47,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-10-04 09:09:47,211 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-10-04 09:09:47,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:09:47,211 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-10-04 09:09:47,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-04 09:09:47,211 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-10-04 09:09:47,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-04 09:09:47,212 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:09:47,212 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1, 1] [2018-10-04 09:09:47,212 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:09:47,212 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:09:47,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1366130531, now seen corresponding path program 54 times [2018-10-04 09:09:47,212 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:09:47,212 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:09:47,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:47,213 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:09:47,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:47,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:09:48,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:48,749 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:09:48,749 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:09:48,755 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:09:48,804 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-10-04 09:09:48,805 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:09:48,807 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:09:48,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:48,838 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:09:48,838 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-10-04 09:09:48,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-04 09:09:48,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-04 09:09:48,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-04 09:09:48,839 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 57 states. [2018-10-04 09:09:48,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:09:48,979 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-10-04 09:09:48,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-04 09:09:48,980 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 57 [2018-10-04 09:09:48,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:09:48,981 INFO L225 Difference]: With dead ends: 61 [2018-10-04 09:09:48,981 INFO L226 Difference]: Without dead ends: 59 [2018-10-04 09:09:48,981 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-04 09:09:48,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-04 09:09:48,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-04 09:09:48,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-04 09:09:48,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-10-04 09:09:48,984 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-10-04 09:09:48,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:09:48,985 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-10-04 09:09:48,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-04 09:09:48,985 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-10-04 09:09:48,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-04 09:09:48,985 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:09:48,985 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1, 1] [2018-10-04 09:09:48,986 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:09:48,986 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:09:48,986 INFO L82 PathProgramCache]: Analyzing trace with hash -599624692, now seen corresponding path program 55 times [2018-10-04 09:09:48,986 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:09:48,986 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:09:48,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:48,987 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:09:48,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:48,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:09:50,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:50,161 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:09:50,161 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:09:50,168 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:09:50,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:09:50,212 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:09:50,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:50,260 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:09:50,260 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-04 09:09:50,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-04 09:09:50,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-04 09:09:50,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-04 09:09:50,262 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 58 states. [2018-10-04 09:09:50,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:09:50,419 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-10-04 09:09:50,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-04 09:09:50,419 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 58 [2018-10-04 09:09:50,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:09:50,420 INFO L225 Difference]: With dead ends: 62 [2018-10-04 09:09:50,420 INFO L226 Difference]: Without dead ends: 60 [2018-10-04 09:09:50,421 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-04 09:09:50,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-04 09:09:50,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-10-04 09:09:50,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-04 09:09:50,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-10-04 09:09:50,423 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-10-04 09:09:50,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:09:50,423 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-10-04 09:09:50,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-04 09:09:50,424 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-10-04 09:09:50,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-10-04 09:09:50,424 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:09:50,424 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1, 1] [2018-10-04 09:09:50,425 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:09:50,425 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:09:50,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1408494461, now seen corresponding path program 56 times [2018-10-04 09:09:50,425 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:09:50,425 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:09:50,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:50,426 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:09:50,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:50,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:09:51,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:51,616 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:09:51,617 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:09:51,624 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:09:51,669 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:09:51,670 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:09:51,672 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:09:51,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:51,702 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:09:51,702 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-10-04 09:09:51,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-04 09:09:51,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-04 09:09:51,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-04 09:09:51,703 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 59 states. [2018-10-04 09:09:51,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:09:51,804 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-10-04 09:09:51,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-04 09:09:51,804 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 59 [2018-10-04 09:09:51,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:09:51,805 INFO L225 Difference]: With dead ends: 63 [2018-10-04 09:09:51,805 INFO L226 Difference]: Without dead ends: 61 [2018-10-04 09:09:51,806 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-04 09:09:51,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-04 09:09:51,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-04 09:09:51,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-04 09:09:51,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-10-04 09:09:51,808 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-10-04 09:09:51,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:09:51,809 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-10-04 09:09:51,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-04 09:09:51,809 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-10-04 09:09:51,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-04 09:09:51,809 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:09:51,809 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1, 1] [2018-10-04 09:09:51,809 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:09:51,809 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:09:51,810 INFO L82 PathProgramCache]: Analyzing trace with hash -713653524, now seen corresponding path program 57 times [2018-10-04 09:09:51,810 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:09:51,810 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:09:51,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:51,810 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:09:51,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:51,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:09:53,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:53,568 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:09:53,568 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:09:53,575 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:09:53,630 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-10-04 09:09:53,630 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:09:53,633 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:09:53,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:53,678 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:09:53,678 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-10-04 09:09:53,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-04 09:09:53,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-04 09:09:53,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-10-04 09:09:53,680 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 60 states. [2018-10-04 09:09:54,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:09:54,047 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-10-04 09:09:54,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-04 09:09:54,048 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 60 [2018-10-04 09:09:54,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:09:54,049 INFO L225 Difference]: With dead ends: 64 [2018-10-04 09:09:54,049 INFO L226 Difference]: Without dead ends: 62 [2018-10-04 09:09:54,049 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-10-04 09:09:54,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-10-04 09:09:54,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-10-04 09:09:54,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-04 09:09:54,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-10-04 09:09:54,053 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-10-04 09:09:54,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:09:54,053 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-10-04 09:09:54,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-04 09:09:54,053 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-10-04 09:09:54,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-04 09:09:54,053 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:09:54,053 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1, 1] [2018-10-04 09:09:54,054 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:09:54,054 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:09:54,054 INFO L82 PathProgramCache]: Analyzing trace with hash -648420957, now seen corresponding path program 58 times [2018-10-04 09:09:54,054 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:09:54,054 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:09:54,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:54,054 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:09:54,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:54,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:09:55,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:55,594 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:09:55,594 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:09:55,603 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:09:55,650 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:09:55,650 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:09:55,653 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:09:55,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:55,687 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:09:55,687 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-10-04 09:09:55,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-04 09:09:55,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-04 09:09:55,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-10-04 09:09:55,688 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 61 states. [2018-10-04 09:09:55,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:09:55,807 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-10-04 09:09:55,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-04 09:09:55,808 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 61 [2018-10-04 09:09:55,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:09:55,809 INFO L225 Difference]: With dead ends: 65 [2018-10-04 09:09:55,809 INFO L226 Difference]: Without dead ends: 63 [2018-10-04 09:09:55,809 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-10-04 09:09:55,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-04 09:09:55,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-10-04 09:09:55,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-04 09:09:55,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-10-04 09:09:55,811 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-10-04 09:09:55,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:09:55,811 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-10-04 09:09:55,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-04 09:09:55,812 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-10-04 09:09:55,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-04 09:09:55,812 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:09:55,812 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1, 1] [2018-10-04 09:09:55,812 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:09:55,813 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:09:55,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1373788620, now seen corresponding path program 59 times [2018-10-04 09:09:55,813 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:09:55,813 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:09:55,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:55,814 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:09:55,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:55,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:09:57,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:57,243 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:09:57,243 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:09:57,250 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:09:57,314 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-10-04 09:09:57,314 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:09:57,317 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:09:57,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:57,360 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:09:57,360 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-10-04 09:09:57,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-04 09:09:57,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-04 09:09:57,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-10-04 09:09:57,361 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 62 states. [2018-10-04 09:09:57,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:09:57,584 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-10-04 09:09:57,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-04 09:09:57,584 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 62 [2018-10-04 09:09:57,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:09:57,585 INFO L225 Difference]: With dead ends: 66 [2018-10-04 09:09:57,585 INFO L226 Difference]: Without dead ends: 64 [2018-10-04 09:09:57,585 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-10-04 09:09:57,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-10-04 09:09:57,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-10-04 09:09:57,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-04 09:09:57,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-10-04 09:09:57,587 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-10-04 09:09:57,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:09:57,588 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-10-04 09:09:57,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-04 09:09:57,588 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-10-04 09:09:57,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-04 09:09:57,588 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:09:57,588 INFO L375 BasicCegarLoop]: trace histogram [60, 1, 1, 1] [2018-10-04 09:09:57,589 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:09:57,589 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:09:57,589 INFO L82 PathProgramCache]: Analyzing trace with hash -362223933, now seen corresponding path program 60 times [2018-10-04 09:09:57,589 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:09:57,589 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:09:57,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:57,590 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:09:57,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:57,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:09:59,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:59,163 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:09:59,163 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:09:59,173 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:09:59,233 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-04 09:09:59,234 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:09:59,236 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:09:59,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:09:59,282 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:09:59,282 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-10-04 09:09:59,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-04 09:09:59,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-04 09:09:59,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-10-04 09:09:59,284 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 63 states. [2018-10-04 09:09:59,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:09:59,421 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-10-04 09:09:59,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-04 09:09:59,421 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 63 [2018-10-04 09:09:59,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:09:59,422 INFO L225 Difference]: With dead ends: 67 [2018-10-04 09:09:59,422 INFO L226 Difference]: Without dead ends: 65 [2018-10-04 09:09:59,423 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-10-04 09:09:59,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-04 09:09:59,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-10-04 09:09:59,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-04 09:09:59,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-10-04 09:09:59,425 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-10-04 09:09:59,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:09:59,426 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-10-04 09:09:59,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-04 09:09:59,426 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-10-04 09:09:59,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-04 09:09:59,426 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:09:59,426 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1, 1] [2018-10-04 09:09:59,426 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:09:59,427 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:09:59,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1655961772, now seen corresponding path program 61 times [2018-10-04 09:09:59,427 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:09:59,427 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:09:59,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:59,427 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:09:59,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:09:59,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:10:00,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:10:00,805 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:10:00,805 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:10:00,813 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:10:00,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:10:00,863 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:10:00,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:10:00,896 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:10:00,896 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-10-04 09:10:00,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-04 09:10:00,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-04 09:10:00,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-10-04 09:10:00,897 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 64 states. [2018-10-04 09:10:00,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:10:00,984 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-10-04 09:10:00,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-04 09:10:00,985 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 64 [2018-10-04 09:10:00,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:10:00,985 INFO L225 Difference]: With dead ends: 68 [2018-10-04 09:10:00,986 INFO L226 Difference]: Without dead ends: 66 [2018-10-04 09:10:00,986 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-10-04 09:10:00,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-04 09:10:00,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-10-04 09:10:00,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-04 09:10:00,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-10-04 09:10:00,989 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-10-04 09:10:00,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:10:00,989 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-10-04 09:10:00,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-04 09:10:00,989 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-10-04 09:10:00,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-04 09:10:00,990 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:10:00,990 INFO L375 BasicCegarLoop]: trace histogram [62, 1, 1, 1] [2018-10-04 09:10:00,990 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:10:00,990 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:10:00,990 INFO L82 PathProgramCache]: Analyzing trace with hash -204790813, now seen corresponding path program 62 times [2018-10-04 09:10:00,991 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:10:00,991 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:10:00,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:10:00,991 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:10:00,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:10:00,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:10:04,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:10:04,484 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:10:04,484 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:10:04,493 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:10:04,545 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:10:04,545 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:10:04,547 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:10:04,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:10:04,589 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:10:04,589 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-10-04 09:10:04,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-04 09:10:04,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-04 09:10:04,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-04 09:10:04,591 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 65 states. [2018-10-04 09:10:04,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:10:04,741 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-10-04 09:10:04,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-04 09:10:04,741 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 65 [2018-10-04 09:10:04,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:10:04,742 INFO L225 Difference]: With dead ends: 69 [2018-10-04 09:10:04,742 INFO L226 Difference]: Without dead ends: 67 [2018-10-04 09:10:04,743 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-04 09:10:04,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-04 09:10:04,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-10-04 09:10:04,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-04 09:10:04,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-10-04 09:10:04,745 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-10-04 09:10:04,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:10:04,745 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-10-04 09:10:04,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-04 09:10:04,746 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-10-04 09:10:04,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-04 09:10:04,746 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:10:04,747 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1, 1] [2018-10-04 09:10:04,747 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:10:04,747 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:10:04,747 INFO L82 PathProgramCache]: Analyzing trace with hash -2053546100, now seen corresponding path program 63 times [2018-10-04 09:10:04,747 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:10:04,748 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:10:04,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:10:04,748 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:10:04,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:10:04,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:10:06,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:10:06,876 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:10:06,876 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:10:06,891 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:10:06,962 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-10-04 09:10:06,962 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:10:06,964 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:10:06,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:10:06,994 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:10:06,995 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-10-04 09:10:06,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-04 09:10:06,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-04 09:10:06,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-10-04 09:10:06,996 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 66 states. [2018-10-04 09:10:07,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:10:07,098 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-10-04 09:10:07,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-04 09:10:07,106 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 66 [2018-10-04 09:10:07,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:10:07,107 INFO L225 Difference]: With dead ends: 70 [2018-10-04 09:10:07,107 INFO L226 Difference]: Without dead ends: 68 [2018-10-04 09:10:07,107 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-10-04 09:10:07,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-04 09:10:07,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-10-04 09:10:07,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-04 09:10:07,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-10-04 09:10:07,110 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-10-04 09:10:07,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:10:07,110 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-10-04 09:10:07,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-04 09:10:07,111 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-10-04 09:10:07,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-04 09:10:07,111 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:10:07,111 INFO L375 BasicCegarLoop]: trace histogram [64, 1, 1, 1] [2018-10-04 09:10:07,111 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:10:07,112 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:10:07,112 INFO L82 PathProgramCache]: Analyzing trace with hash 764582147, now seen corresponding path program 64 times [2018-10-04 09:10:07,112 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:10:07,112 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:10:07,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:10:07,113 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:10:07,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:10:07,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:10:08,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:10:08,928 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:10:08,928 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:10:08,937 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:10:08,988 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:10:08,988 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:10:08,991 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:10:09,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:10:09,033 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:10:09,033 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-10-04 09:10:09,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-04 09:10:09,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-04 09:10:09,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-10-04 09:10:09,036 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 67 states. [2018-10-04 09:10:09,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:10:09,198 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-10-04 09:10:09,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-04 09:10:09,198 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 67 [2018-10-04 09:10:09,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:10:09,199 INFO L225 Difference]: With dead ends: 71 [2018-10-04 09:10:09,199 INFO L226 Difference]: Without dead ends: 69 [2018-10-04 09:10:09,199 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-10-04 09:10:09,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-04 09:10:09,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-10-04 09:10:09,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-04 09:10:09,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-10-04 09:10:09,202 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-10-04 09:10:09,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:10:09,203 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-10-04 09:10:09,203 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-04 09:10:09,203 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-10-04 09:10:09,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-04 09:10:09,203 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:10:09,204 INFO L375 BasicCegarLoop]: trace histogram [65, 1, 1, 1] [2018-10-04 09:10:09,204 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:10:09,204 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:10:09,204 INFO L82 PathProgramCache]: Analyzing trace with hash -2067755412, now seen corresponding path program 65 times [2018-10-04 09:10:09,205 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:10:09,205 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:10:09,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:10:09,205 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:10:09,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:10:09,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:10:10,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:10:10,746 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:10:10,746 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:10:10,752 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:10:10,820 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-10-04 09:10:10,820 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:10:10,824 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:10:10,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:10:10,871 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:10:10,872 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-10-04 09:10:10,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-04 09:10:10,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-04 09:10:10,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-10-04 09:10:10,874 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 68 states. [2018-10-04 09:10:11,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:10:11,214 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-10-04 09:10:11,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-04 09:10:11,215 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 68 [2018-10-04 09:10:11,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:10:11,215 INFO L225 Difference]: With dead ends: 72 [2018-10-04 09:10:11,215 INFO L226 Difference]: Without dead ends: 70 [2018-10-04 09:10:11,216 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-10-04 09:10:11,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-10-04 09:10:11,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-10-04 09:10:11,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-04 09:10:11,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-10-04 09:10:11,217 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-10-04 09:10:11,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:10:11,218 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-10-04 09:10:11,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-04 09:10:11,218 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-10-04 09:10:11,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-10-04 09:10:11,218 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:10:11,218 INFO L375 BasicCegarLoop]: trace histogram [66, 1, 1, 1] [2018-10-04 09:10:11,218 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:10:11,219 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:10:11,219 INFO L82 PathProgramCache]: Analyzing trace with hash 324093475, now seen corresponding path program 66 times [2018-10-04 09:10:11,219 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:10:11,219 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:10:11,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:10:11,219 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:10:11,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:10:11,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:10:12,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:10:12,798 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:10:12,798 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:10:12,805 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:10:12,875 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-10-04 09:10:12,875 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:10:12,879 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:10:12,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:10:12,931 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:10:12,931 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-10-04 09:10:12,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-04 09:10:12,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-04 09:10:12,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-10-04 09:10:12,933 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 69 states. [2018-10-04 09:10:13,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:10:13,137 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-10-04 09:10:13,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-04 09:10:13,137 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 69 [2018-10-04 09:10:13,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:10:13,138 INFO L225 Difference]: With dead ends: 73 [2018-10-04 09:10:13,138 INFO L226 Difference]: Without dead ends: 71 [2018-10-04 09:10:13,139 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-10-04 09:10:13,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-04 09:10:13,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-10-04 09:10:13,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-04 09:10:13,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-10-04 09:10:13,141 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-10-04 09:10:13,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:10:13,142 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-10-04 09:10:13,142 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-04 09:10:13,142 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-10-04 09:10:13,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-04 09:10:13,142 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:10:13,142 INFO L375 BasicCegarLoop]: trace histogram [67, 1, 1, 1] [2018-10-04 09:10:13,142 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:10:13,142 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:10:13,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1456964940, now seen corresponding path program 67 times [2018-10-04 09:10:13,144 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:10:13,144 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:10:13,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:10:13,144 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:10:13,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:10:13,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:10:15,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:10:15,142 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:10:15,142 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:10:15,149 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:10:15,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:10:15,204 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:10:15,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:10:15,237 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:10:15,237 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-10-04 09:10:15,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-04 09:10:15,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-04 09:10:15,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-10-04 09:10:15,238 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 70 states. [2018-10-04 09:10:15,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:10:15,366 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-10-04 09:10:15,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-04 09:10:15,366 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 70 [2018-10-04 09:10:15,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:10:15,367 INFO L225 Difference]: With dead ends: 74 [2018-10-04 09:10:15,367 INFO L226 Difference]: Without dead ends: 72 [2018-10-04 09:10:15,368 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-10-04 09:10:15,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-10-04 09:10:15,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-10-04 09:10:15,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-10-04 09:10:15,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-10-04 09:10:15,371 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-10-04 09:10:15,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:10:15,371 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-10-04 09:10:15,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-04 09:10:15,372 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-10-04 09:10:15,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-10-04 09:10:15,372 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:10:15,372 INFO L375 BasicCegarLoop]: trace histogram [68, 1, 1, 1] [2018-10-04 09:10:15,372 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:10:15,372 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:10:15,372 INFO L82 PathProgramCache]: Analyzing trace with hash -2078725309, now seen corresponding path program 68 times [2018-10-04 09:10:15,373 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:10:15,373 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:10:15,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:10:15,373 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:10:15,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:10:15,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:10:17,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:10:17,206 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:10:17,206 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:10:17,212 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:10:17,265 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:10:17,265 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:10:17,268 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:10:17,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:10:17,301 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:10:17,301 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-10-04 09:10:17,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-04 09:10:17,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-04 09:10:17,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-10-04 09:10:17,302 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 71 states. [2018-10-04 09:10:17,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:10:17,477 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-10-04 09:10:17,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-04 09:10:17,478 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 71 [2018-10-04 09:10:17,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:10:17,479 INFO L225 Difference]: With dead ends: 75 [2018-10-04 09:10:17,479 INFO L226 Difference]: Without dead ends: 73 [2018-10-04 09:10:17,479 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-10-04 09:10:17,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-04 09:10:17,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-10-04 09:10:17,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-04 09:10:17,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-10-04 09:10:17,481 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2018-10-04 09:10:17,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:10:17,482 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-10-04 09:10:17,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-04 09:10:17,482 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-10-04 09:10:17,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-04 09:10:17,483 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:10:17,483 INFO L375 BasicCegarLoop]: trace histogram [69, 1, 1, 1] [2018-10-04 09:10:17,483 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:10:17,483 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:10:17,484 INFO L82 PathProgramCache]: Analyzing trace with hash -15973332, now seen corresponding path program 69 times [2018-10-04 09:10:17,484 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:10:17,484 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:10:17,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:10:17,484 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:10:17,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:10:17,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:10:19,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:10:19,484 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:10:19,484 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:10:19,492 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:10:19,557 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-10-04 09:10:19,557 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:10:19,560 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:10:19,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:10:19,610 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:10:19,610 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-10-04 09:10:19,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-04 09:10:19,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-04 09:10:19,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-10-04 09:10:19,612 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 72 states. [2018-10-04 09:10:21,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:10:21,005 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-10-04 09:10:21,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-04 09:10:21,006 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 72 [2018-10-04 09:10:21,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:10:21,006 INFO L225 Difference]: With dead ends: 76 [2018-10-04 09:10:21,007 INFO L226 Difference]: Without dead ends: 74 [2018-10-04 09:10:21,007 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-10-04 09:10:21,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-04 09:10:21,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-10-04 09:10:21,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-10-04 09:10:21,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-10-04 09:10:21,009 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2018-10-04 09:10:21,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:10:21,010 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-10-04 09:10:21,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-04 09:10:21,010 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-10-04 09:10:21,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-10-04 09:10:21,010 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:10:21,010 INFO L375 BasicCegarLoop]: trace histogram [70, 1, 1, 1] [2018-10-04 09:10:21,011 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:10:21,011 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:10:21,011 INFO L82 PathProgramCache]: Analyzing trace with hash -495171485, now seen corresponding path program 70 times [2018-10-04 09:10:21,011 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:10:21,011 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:10:21,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:10:21,012 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:10:21,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:10:21,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:10:23,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:10:23,089 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:10:23,089 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:10:23,095 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:10:23,161 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:10:23,161 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:10:23,164 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:10:23,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:10:23,202 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:10:23,202 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-10-04 09:10:23,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-04 09:10:23,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-04 09:10:23,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-10-04 09:10:23,204 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 73 states. [2018-10-04 09:10:23,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:10:23,376 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-10-04 09:10:23,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-04 09:10:23,377 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 73 [2018-10-04 09:10:23,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:10:23,378 INFO L225 Difference]: With dead ends: 77 [2018-10-04 09:10:23,378 INFO L226 Difference]: Without dead ends: 75 [2018-10-04 09:10:23,378 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-10-04 09:10:23,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-04 09:10:23,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-10-04 09:10:23,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-04 09:10:23,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-10-04 09:10:23,381 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2018-10-04 09:10:23,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:10:23,381 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-10-04 09:10:23,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-04 09:10:23,382 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-10-04 09:10:23,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-04 09:10:23,382 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:10:23,382 INFO L375 BasicCegarLoop]: trace histogram [71, 1, 1, 1] [2018-10-04 09:10:23,382 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:10:23,383 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:10:23,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1829554956, now seen corresponding path program 71 times [2018-10-04 09:10:23,383 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:10:23,383 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:10:23,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:10:23,384 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:10:23,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:10:23,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:10:25,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:10:25,500 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:10:25,500 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:10:25,507 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:10:25,587 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-10-04 09:10:25,587 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:10:25,590 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:10:25,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:10:25,631 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:10:25,632 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-10-04 09:10:25,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-04 09:10:25,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-04 09:10:25,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-10-04 09:10:25,633 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 74 states. [2018-10-04 09:10:25,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:10:25,772 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-10-04 09:10:25,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-04 09:10:25,772 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 74 [2018-10-04 09:10:25,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:10:25,773 INFO L225 Difference]: With dead ends: 78 [2018-10-04 09:10:25,773 INFO L226 Difference]: Without dead ends: 76 [2018-10-04 09:10:25,774 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-10-04 09:10:25,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-10-04 09:10:25,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-10-04 09:10:25,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-04 09:10:25,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-10-04 09:10:25,776 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2018-10-04 09:10:25,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:10:25,777 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-10-04 09:10:25,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-04 09:10:25,777 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-10-04 09:10:25,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-10-04 09:10:25,777 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:10:25,778 INFO L375 BasicCegarLoop]: trace histogram [72, 1, 1, 1] [2018-10-04 09:10:25,778 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:10:25,778 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:10:25,778 INFO L82 PathProgramCache]: Analyzing trace with hash 881630595, now seen corresponding path program 72 times [2018-10-04 09:10:25,778 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:10:25,778 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:10:25,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:10:25,779 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:10:25,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:10:25,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:10:27,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:10:27,817 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:10:27,818 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:10:27,824 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:10:27,902 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-04 09:10:27,903 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:10:27,906 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:10:27,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:10:27,975 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:10:27,975 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-10-04 09:10:27,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-04 09:10:27,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-04 09:10:27,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-10-04 09:10:27,976 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 75 states. [2018-10-04 09:10:28,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:10:28,101 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-10-04 09:10:28,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-04 09:10:28,101 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 75 [2018-10-04 09:10:28,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:10:28,102 INFO L225 Difference]: With dead ends: 79 [2018-10-04 09:10:28,102 INFO L226 Difference]: Without dead ends: 77 [2018-10-04 09:10:28,103 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-10-04 09:10:28,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-04 09:10:28,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-10-04 09:10:28,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-04 09:10:28,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-10-04 09:10:28,106 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2018-10-04 09:10:28,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:10:28,106 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-10-04 09:10:28,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-04 09:10:28,107 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-10-04 09:10:28,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-04 09:10:28,107 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:10:28,107 INFO L375 BasicCegarLoop]: trace histogram [73, 1, 1, 1] [2018-10-04 09:10:28,107 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:10:28,108 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:10:28,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1560746476, now seen corresponding path program 73 times [2018-10-04 09:10:28,108 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:10:28,108 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:10:28,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:10:28,109 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:10:28,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:10:28,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:10:30,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:10:30,668 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:10:30,668 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:10:30,675 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:10:30,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:10:30,738 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:10:30,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:10:30,779 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:10:30,780 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-10-04 09:10:30,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-04 09:10:30,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-04 09:10:30,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-10-04 09:10:30,781 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 76 states. [2018-10-04 09:10:30,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:10:30,930 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-10-04 09:10:30,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-04 09:10:30,930 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 76 [2018-10-04 09:10:30,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:10:30,931 INFO L225 Difference]: With dead ends: 80 [2018-10-04 09:10:30,931 INFO L226 Difference]: Without dead ends: 78 [2018-10-04 09:10:30,931 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-10-04 09:10:30,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-10-04 09:10:30,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-10-04 09:10:30,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-10-04 09:10:30,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-10-04 09:10:30,933 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2018-10-04 09:10:30,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:10:30,933 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-10-04 09:10:30,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-04 09:10:30,934 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-10-04 09:10:30,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-10-04 09:10:30,934 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:10:30,934 INFO L375 BasicCegarLoop]: trace histogram [74, 1, 1, 1] [2018-10-04 09:10:30,934 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:10:30,934 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:10:30,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1138502307, now seen corresponding path program 74 times [2018-10-04 09:10:30,935 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:10:30,935 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:10:30,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:10:30,935 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:10:30,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:10:30,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:10:32,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:10:32,948 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:10:32,948 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:10:32,954 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:10:33,008 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:10:33,009 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:10:33,011 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:10:33,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:10:33,050 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:10:33,050 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-10-04 09:10:33,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-04 09:10:33,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-04 09:10:33,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-10-04 09:10:33,052 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 77 states. [2018-10-04 09:10:33,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:10:33,205 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-10-04 09:10:33,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-04 09:10:33,206 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 77 [2018-10-04 09:10:33,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:10:33,206 INFO L225 Difference]: With dead ends: 81 [2018-10-04 09:10:33,206 INFO L226 Difference]: Without dead ends: 79 [2018-10-04 09:10:33,207 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-10-04 09:10:33,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-04 09:10:33,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-10-04 09:10:33,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-04 09:10:33,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-10-04 09:10:33,209 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2018-10-04 09:10:33,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:10:33,209 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-10-04 09:10:33,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-04 09:10:33,209 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-10-04 09:10:33,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-04 09:10:33,210 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:10:33,210 INFO L375 BasicCegarLoop]: trace histogram [75, 1, 1, 1] [2018-10-04 09:10:33,210 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:10:33,210 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:10:33,211 INFO L82 PathProgramCache]: Analyzing trace with hash 933834956, now seen corresponding path program 75 times [2018-10-04 09:10:33,211 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:10:33,211 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:10:33,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:10:33,211 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:10:33,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:10:33,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:10:35,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:10:35,582 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:10:35,582 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:10:35,589 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:10:35,667 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-10-04 09:10:35,667 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:10:35,670 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:10:35,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:10:35,703 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:10:35,704 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-10-04 09:10:35,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-04 09:10:35,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-04 09:10:35,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-10-04 09:10:35,705 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 78 states. [2018-10-04 09:10:35,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:10:35,852 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-10-04 09:10:35,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-04 09:10:35,853 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 78 [2018-10-04 09:10:35,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:10:35,854 INFO L225 Difference]: With dead ends: 82 [2018-10-04 09:10:35,854 INFO L226 Difference]: Without dead ends: 80 [2018-10-04 09:10:35,854 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-10-04 09:10:35,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-10-04 09:10:35,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-10-04 09:10:35,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-04 09:10:35,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-10-04 09:10:35,856 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2018-10-04 09:10:35,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:10:35,857 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-10-04 09:10:35,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-04 09:10:35,857 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-10-04 09:10:35,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-04 09:10:35,858 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:10:35,858 INFO L375 BasicCegarLoop]: trace histogram [76, 1, 1, 1] [2018-10-04 09:10:35,858 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:10:35,858 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:10:35,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1115885629, now seen corresponding path program 76 times [2018-10-04 09:10:35,859 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:10:35,859 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:10:35,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:10:35,859 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:10:35,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:10:35,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:10:38,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:10:38,006 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:10:38,006 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:10:38,013 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:10:38,082 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:10:38,082 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:10:38,085 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:10:38,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:10:38,119 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:10:38,119 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-10-04 09:10:38,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-10-04 09:10:38,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-10-04 09:10:38,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-10-04 09:10:38,121 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 79 states. [2018-10-04 09:10:38,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:10:38,740 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-10-04 09:10:38,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-04 09:10:38,741 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 79 [2018-10-04 09:10:38,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:10:38,741 INFO L225 Difference]: With dead ends: 83 [2018-10-04 09:10:38,741 INFO L226 Difference]: Without dead ends: 81 [2018-10-04 09:10:38,742 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-10-04 09:10:38,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-04 09:10:38,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-10-04 09:10:38,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-10-04 09:10:38,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-10-04 09:10:38,745 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2018-10-04 09:10:38,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:10:38,745 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-10-04 09:10:38,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-10-04 09:10:38,745 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-10-04 09:10:38,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-04 09:10:38,746 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:10:38,746 INFO L375 BasicCegarLoop]: trace histogram [77, 1, 1, 1] [2018-10-04 09:10:38,746 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:10:38,746 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:10:38,747 INFO L82 PathProgramCache]: Analyzing trace with hash -232714324, now seen corresponding path program 77 times [2018-10-04 09:10:38,747 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:10:38,747 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:10:38,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:10:38,747 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:10:38,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:10:38,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:10:41,188 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:10:41,188 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:10:41,189 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:10:41,196 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:10:41,278 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-10-04 09:10:41,278 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:10:41,282 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:10:41,300 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:10:41,330 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:10:41,330 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-10-04 09:10:41,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-04 09:10:41,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-04 09:10:41,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-10-04 09:10:41,332 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 80 states. [2018-10-04 09:10:42,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:10:42,917 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2018-10-04 09:10:42,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-04 09:10:42,917 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 80 [2018-10-04 09:10:42,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:10:42,918 INFO L225 Difference]: With dead ends: 84 [2018-10-04 09:10:42,918 INFO L226 Difference]: Without dead ends: 82 [2018-10-04 09:10:42,919 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-10-04 09:10:42,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-10-04 09:10:42,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-10-04 09:10:42,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-10-04 09:10:42,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-10-04 09:10:42,921 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2018-10-04 09:10:42,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:10:42,921 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-10-04 09:10:42,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-04 09:10:42,922 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-10-04 09:10:42,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-10-04 09:10:42,922 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:10:42,922 INFO L375 BasicCegarLoop]: trace histogram [78, 1, 1, 1] [2018-10-04 09:10:42,922 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:10:42,923 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:10:42,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1375792355, now seen corresponding path program 78 times [2018-10-04 09:10:42,923 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:10:42,923 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:10:42,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:10:42,924 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:10:42,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:10:42,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:10:45,479 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:10:45,479 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:10:45,479 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:10:45,497 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:10:45,745 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2018-10-04 09:10:45,746 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:10:45,748 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:10:45,769 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:10:45,799 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:10:45,799 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-10-04 09:10:45,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-10-04 09:10:45,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-10-04 09:10:45,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-10-04 09:10:45,800 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 81 states. [2018-10-04 09:10:46,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:10:46,044 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-10-04 09:10:46,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-04 09:10:46,045 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 81 [2018-10-04 09:10:46,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:10:46,045 INFO L225 Difference]: With dead ends: 85 [2018-10-04 09:10:46,046 INFO L226 Difference]: Without dead ends: 83 [2018-10-04 09:10:46,046 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-10-04 09:10:46,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-04 09:10:46,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-10-04 09:10:46,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-04 09:10:46,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-10-04 09:10:46,049 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2018-10-04 09:10:46,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:10:46,049 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-10-04 09:10:46,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-10-04 09:10:46,049 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-10-04 09:10:46,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-04 09:10:46,049 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:10:46,050 INFO L375 BasicCegarLoop]: trace histogram [79, 1, 1, 1] [2018-10-04 09:10:46,050 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:10:46,050 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:10:46,050 INFO L82 PathProgramCache]: Analyzing trace with hash -300108148, now seen corresponding path program 79 times [2018-10-04 09:10:46,050 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:10:46,050 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:10:46,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:10:46,051 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:10:46,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:10:46,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:10:48,522 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:10:48,522 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:10:48,522 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:10:48,530 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:10:48,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:10:48,590 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:10:48,611 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:10:48,638 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:10:48,638 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-10-04 09:10:48,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-04 09:10:48,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-04 09:10:48,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-10-04 09:10:48,640 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 82 states. [2018-10-04 09:10:48,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:10:48,804 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-10-04 09:10:48,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-04 09:10:48,805 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 82 [2018-10-04 09:10:48,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:10:48,805 INFO L225 Difference]: With dead ends: 86 [2018-10-04 09:10:48,805 INFO L226 Difference]: Without dead ends: 84 [2018-10-04 09:10:48,806 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-10-04 09:10:48,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-10-04 09:10:48,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-10-04 09:10:48,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-10-04 09:10:48,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-10-04 09:10:48,807 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2018-10-04 09:10:48,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:10:48,808 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-10-04 09:10:48,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-04 09:10:48,808 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-10-04 09:10:48,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-04 09:10:48,808 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:10:48,808 INFO L375 BasicCegarLoop]: trace histogram [80, 1, 1, 1] [2018-10-04 09:10:48,808 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:10:48,809 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:10:48,809 INFO L82 PathProgramCache]: Analyzing trace with hash -713416189, now seen corresponding path program 80 times [2018-10-04 09:10:48,809 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:10:48,809 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:10:48,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:10:48,809 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:10:48,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:10:48,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:10:51,442 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:10:51,443 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:10:51,443 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:10:51,450 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:10:51,512 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:10:51,513 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:10:51,515 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:10:51,529 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:10:51,550 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:10:51,550 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-10-04 09:10:51,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-04 09:10:51,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-04 09:10:51,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-10-04 09:10:51,551 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 83 states. [2018-10-04 09:10:51,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:10:51,742 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-10-04 09:10:51,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-04 09:10:51,743 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 83 [2018-10-04 09:10:51,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:10:51,743 INFO L225 Difference]: With dead ends: 87 [2018-10-04 09:10:51,743 INFO L226 Difference]: Without dead ends: 85 [2018-10-04 09:10:51,743 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-10-04 09:10:51,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-10-04 09:10:51,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-10-04 09:10:51,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-04 09:10:51,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-10-04 09:10:51,745 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2018-10-04 09:10:51,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:10:51,746 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-10-04 09:10:51,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-04 09:10:51,746 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-10-04 09:10:51,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-04 09:10:51,746 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:10:51,746 INFO L375 BasicCegarLoop]: trace histogram [81, 1, 1, 1] [2018-10-04 09:10:51,746 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:10:51,746 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:10:51,747 INFO L82 PathProgramCache]: Analyzing trace with hash -641063572, now seen corresponding path program 81 times [2018-10-04 09:10:51,747 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:10:51,747 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:10:51,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:10:51,747 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:10:51,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:10:51,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:10:54,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:10:54,272 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:10:54,272 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:10:54,280 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:10:54,373 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-10-04 09:10:54,373 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:10:54,376 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:10:54,391 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:10:54,410 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:10:54,411 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-10-04 09:10:54,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-04 09:10:54,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-04 09:10:54,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-10-04 09:10:54,412 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 84 states. [2018-10-04 09:10:54,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:10:54,657 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-10-04 09:10:54,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-10-04 09:10:54,658 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 84 [2018-10-04 09:10:54,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:10:54,658 INFO L225 Difference]: With dead ends: 88 [2018-10-04 09:10:54,658 INFO L226 Difference]: Without dead ends: 86 [2018-10-04 09:10:54,659 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-10-04 09:10:54,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-04 09:10:54,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-10-04 09:10:54,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-10-04 09:10:54,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-10-04 09:10:54,661 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2018-10-04 09:10:54,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:10:54,661 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-10-04 09:10:54,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-04 09:10:54,661 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-10-04 09:10:54,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-10-04 09:10:54,662 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:10:54,662 INFO L375 BasicCegarLoop]: trace histogram [82, 1, 1, 1] [2018-10-04 09:10:54,662 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:10:54,662 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:10:54,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1601867555, now seen corresponding path program 82 times [2018-10-04 09:10:54,662 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:10:54,662 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:10:54,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:10:54,663 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:10:54,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:10:54,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:10:57,128 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:10:57,129 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:10:57,129 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:10:57,137 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:10:57,200 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:10:57,200 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:10:57,203 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:10:57,223 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:10:57,252 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:10:57,252 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-10-04 09:10:57,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-10-04 09:10:57,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-10-04 09:10:57,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-10-04 09:10:57,254 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 85 states. [2018-10-04 09:10:57,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:10:57,486 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-10-04 09:10:57,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-10-04 09:10:57,487 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 85 [2018-10-04 09:10:57,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:10:57,487 INFO L225 Difference]: With dead ends: 89 [2018-10-04 09:10:57,487 INFO L226 Difference]: Without dead ends: 87 [2018-10-04 09:10:57,488 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-10-04 09:10:57,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-04 09:10:57,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-10-04 09:10:57,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-04 09:10:57,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-10-04 09:10:57,493 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2018-10-04 09:10:57,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:10:57,493 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-10-04 09:10:57,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-10-04 09:10:57,493 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-10-04 09:10:57,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-04 09:10:57,494 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:10:57,494 INFO L375 BasicCegarLoop]: trace histogram [83, 1, 1, 1] [2018-10-04 09:10:57,494 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:10:57,494 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:10:57,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1881711540, now seen corresponding path program 83 times [2018-10-04 09:10:57,494 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:10:57,494 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:10:57,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:10:57,495 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:10:57,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:10:57,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:11:00,380 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:11:00,380 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:11:00,380 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:11:00,389 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:11:00,480 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-10-04 09:11:00,480 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:11:00,483 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:11:00,498 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:11:00,517 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:11:00,518 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-10-04 09:11:00,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-04 09:11:00,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-04 09:11:00,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-10-04 09:11:00,519 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 86 states. [2018-10-04 09:11:00,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:11:00,861 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2018-10-04 09:11:00,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-04 09:11:00,861 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 86 [2018-10-04 09:11:00,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:11:00,862 INFO L225 Difference]: With dead ends: 90 [2018-10-04 09:11:00,862 INFO L226 Difference]: Without dead ends: 88 [2018-10-04 09:11:00,862 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-10-04 09:11:00,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-10-04 09:11:00,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-10-04 09:11:00,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-04 09:11:00,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-10-04 09:11:00,865 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2018-10-04 09:11:00,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:11:00,865 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-10-04 09:11:00,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-04 09:11:00,865 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-10-04 09:11:00,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-04 09:11:00,866 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:11:00,866 INFO L375 BasicCegarLoop]: trace histogram [84, 1, 1, 1] [2018-10-04 09:11:00,866 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:11:00,866 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:11:00,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1796486211, now seen corresponding path program 84 times [2018-10-04 09:11:00,866 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:11:00,866 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:11:00,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:11:00,867 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:11:00,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:11:00,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:11:03,494 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:11:03,494 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:11:03,494 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:11:03,506 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:11:03,591 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-10-04 09:11:03,592 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:11:03,595 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:11:03,613 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:11:03,639 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:11:03,640 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-10-04 09:11:03,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-10-04 09:11:03,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-10-04 09:11:03,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-10-04 09:11:03,641 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 87 states. [2018-10-04 09:11:03,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:11:03,850 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-10-04 09:11:03,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-10-04 09:11:03,851 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 87 [2018-10-04 09:11:03,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:11:03,851 INFO L225 Difference]: With dead ends: 91 [2018-10-04 09:11:03,851 INFO L226 Difference]: Without dead ends: 89 [2018-10-04 09:11:03,852 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-10-04 09:11:03,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-04 09:11:03,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-10-04 09:11:03,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-04 09:11:03,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-10-04 09:11:03,854 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2018-10-04 09:11:03,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:11:03,854 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-10-04 09:11:03,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-10-04 09:11:03,855 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-10-04 09:11:03,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-04 09:11:03,855 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:11:03,855 INFO L375 BasicCegarLoop]: trace histogram [85, 1, 1, 1] [2018-10-04 09:11:03,856 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:11:03,856 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:11:03,856 INFO L82 PathProgramCache]: Analyzing trace with hash -143500500, now seen corresponding path program 85 times [2018-10-04 09:11:03,856 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:11:03,856 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:11:03,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:11:03,857 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:11:03,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:11:03,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:11:06,779 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:11:06,779 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:11:06,779 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:11:06,786 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:11:06,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:11:06,853 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:11:06,868 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:11:06,888 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:11:06,889 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-10-04 09:11:06,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-04 09:11:06,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-04 09:11:06,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-10-04 09:11:06,890 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 88 states. [2018-10-04 09:11:07,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:11:07,051 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2018-10-04 09:11:07,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-04 09:11:07,052 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 88 [2018-10-04 09:11:07,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:11:07,053 INFO L225 Difference]: With dead ends: 92 [2018-10-04 09:11:07,053 INFO L226 Difference]: Without dead ends: 90 [2018-10-04 09:11:07,053 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-10-04 09:11:07,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-10-04 09:11:07,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-10-04 09:11:07,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-10-04 09:11:07,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-10-04 09:11:07,056 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2018-10-04 09:11:07,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:11:07,056 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-10-04 09:11:07,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-04 09:11:07,056 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-10-04 09:11:07,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-10-04 09:11:07,057 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:11:07,057 INFO L375 BasicCegarLoop]: trace histogram [86, 1, 1, 1] [2018-10-04 09:11:07,057 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:11:07,057 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:11:07,057 INFO L82 PathProgramCache]: Analyzing trace with hash -153546397, now seen corresponding path program 86 times [2018-10-04 09:11:07,058 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:11:07,058 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:11:07,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:11:07,058 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:11:07,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:11:07,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:11:10,068 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:11:10,068 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:11:10,069 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:11:10,075 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:11:10,143 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:11:10,144 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:11:10,146 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:11:10,161 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:11:10,181 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:11:10,182 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-10-04 09:11:10,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-10-04 09:11:10,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-10-04 09:11:10,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-10-04 09:11:10,183 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 89 states. [2018-10-04 09:11:10,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:11:10,390 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-10-04 09:11:10,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-10-04 09:11:10,390 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 89 [2018-10-04 09:11:10,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:11:10,391 INFO L225 Difference]: With dead ends: 93 [2018-10-04 09:11:10,391 INFO L226 Difference]: Without dead ends: 91 [2018-10-04 09:11:10,391 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-10-04 09:11:10,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-04 09:11:10,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-10-04 09:11:10,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-04 09:11:10,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-10-04 09:11:10,393 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2018-10-04 09:11:10,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:11:10,393 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-10-04 09:11:10,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-10-04 09:11:10,393 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-10-04 09:11:10,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-04 09:11:10,394 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:11:10,394 INFO L375 BasicCegarLoop]: trace histogram [87, 1, 1, 1] [2018-10-04 09:11:10,394 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:11:10,394 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:11:10,394 INFO L82 PathProgramCache]: Analyzing trace with hash -464969204, now seen corresponding path program 87 times [2018-10-04 09:11:10,394 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:11:10,394 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:11:10,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:11:10,395 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:11:10,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:11:10,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:11:13,135 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:11:13,136 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:11:13,136 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:11:13,144 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:11:13,237 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-10-04 09:11:13,238 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:11:13,241 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:11:13,257 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:11:13,277 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:11:13,278 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-10-04 09:11:13,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-04 09:11:13,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-04 09:11:13,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-10-04 09:11:13,279 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 90 states. [2018-10-04 09:11:13,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:11:13,477 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-10-04 09:11:13,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-04 09:11:13,483 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 90 [2018-10-04 09:11:13,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:11:13,484 INFO L225 Difference]: With dead ends: 94 [2018-10-04 09:11:13,484 INFO L226 Difference]: Without dead ends: 92 [2018-10-04 09:11:13,484 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-10-04 09:11:13,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-10-04 09:11:13,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-10-04 09:11:13,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-10-04 09:11:13,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-10-04 09:11:13,487 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2018-10-04 09:11:13,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:11:13,487 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-10-04 09:11:13,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-04 09:11:13,488 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-10-04 09:11:13,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-10-04 09:11:13,488 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:11:13,488 INFO L375 BasicCegarLoop]: trace histogram [88, 1, 1, 1] [2018-10-04 09:11:13,489 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:11:13,489 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:11:13,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1529141629, now seen corresponding path program 88 times [2018-10-04 09:11:13,489 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:11:13,489 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:11:13,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:11:13,490 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:11:13,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:11:13,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:11:16,639 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:11:16,640 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:11:16,640 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:11:16,646 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:11:16,715 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:11:16,715 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:11:16,718 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:11:16,736 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:11:16,755 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:11:16,756 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-10-04 09:11:16,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-10-04 09:11:16,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-10-04 09:11:16,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-10-04 09:11:16,757 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 91 states. [2018-10-04 09:11:16,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:11:16,907 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-10-04 09:11:16,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-10-04 09:11:16,907 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 91 [2018-10-04 09:11:16,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:11:16,908 INFO L225 Difference]: With dead ends: 95 [2018-10-04 09:11:16,908 INFO L226 Difference]: Without dead ends: 93 [2018-10-04 09:11:16,909 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-10-04 09:11:16,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-04 09:11:16,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-10-04 09:11:16,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-10-04 09:11:16,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-10-04 09:11:16,912 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2018-10-04 09:11:16,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:11:16,912 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-10-04 09:11:16,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-10-04 09:11:16,913 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-10-04 09:11:16,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-04 09:11:16,913 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:11:16,913 INFO L375 BasicCegarLoop]: trace histogram [89, 1, 1, 1] [2018-10-04 09:11:16,913 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:11:16,914 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:11:16,914 INFO L82 PathProgramCache]: Analyzing trace with hash -158748436, now seen corresponding path program 89 times [2018-10-04 09:11:16,914 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:11:16,914 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:11:16,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:11:16,915 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:11:16,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:11:16,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:11:19,765 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:11:19,765 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:11:19,765 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:11:19,773 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:11:19,882 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-10-04 09:11:19,882 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:11:19,886 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:11:19,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:11:19,923 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:11:19,923 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-10-04 09:11:19,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-04 09:11:19,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-04 09:11:19,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-10-04 09:11:19,925 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 92 states. [2018-10-04 09:11:20,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:11:20,296 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2018-10-04 09:11:20,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-10-04 09:11:20,297 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 92 [2018-10-04 09:11:20,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:11:20,297 INFO L225 Difference]: With dead ends: 96 [2018-10-04 09:11:20,297 INFO L226 Difference]: Without dead ends: 94 [2018-10-04 09:11:20,298 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-10-04 09:11:20,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-10-04 09:11:20,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-10-04 09:11:20,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-04 09:11:20,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-10-04 09:11:20,300 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2018-10-04 09:11:20,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:11:20,300 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-10-04 09:11:20,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-10-04 09:11:20,300 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-10-04 09:11:20,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-10-04 09:11:20,300 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:11:20,300 INFO L375 BasicCegarLoop]: trace histogram [90, 1, 1, 1] [2018-10-04 09:11:20,301 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:11:20,301 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:11:20,301 INFO L82 PathProgramCache]: Analyzing trace with hash -626232413, now seen corresponding path program 90 times [2018-10-04 09:11:20,301 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:11:20,301 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:11:20,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:11:20,302 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:11:20,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:11:20,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:11:23,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:11:23,360 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:11:23,360 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:11:23,368 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:11:23,464 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2018-10-04 09:11:23,465 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:11:23,467 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:11:23,485 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:11:23,505 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:11:23,505 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-10-04 09:11:23,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-10-04 09:11:23,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-10-04 09:11:23,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-10-04 09:11:23,507 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 93 states. [2018-10-04 09:11:23,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:11:23,999 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-10-04 09:11:24,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-10-04 09:11:24,000 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 93 [2018-10-04 09:11:24,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:11:24,000 INFO L225 Difference]: With dead ends: 97 [2018-10-04 09:11:24,000 INFO L226 Difference]: Without dead ends: 95 [2018-10-04 09:11:24,001 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-10-04 09:11:24,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-04 09:11:24,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-10-04 09:11:24,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-04 09:11:24,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-10-04 09:11:24,003 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2018-10-04 09:11:24,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:11:24,003 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-10-04 09:11:24,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-10-04 09:11:24,003 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-10-04 09:11:24,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-04 09:11:24,003 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:11:24,004 INFO L375 BasicCegarLoop]: trace histogram [91, 1, 1, 1] [2018-10-04 09:11:24,004 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:11:24,004 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:11:24,004 INFO L82 PathProgramCache]: Analyzing trace with hash 2061633484, now seen corresponding path program 91 times [2018-10-04 09:11:24,004 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:11:24,004 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:11:24,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:11:24,005 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:11:24,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:11:24,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:11:27,300 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:11:27,300 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:11:27,300 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:11:27,311 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:11:27,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:11:27,385 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:11:27,404 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:11:27,424 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:11:27,424 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-10-04 09:11:27,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-10-04 09:11:27,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-10-04 09:11:27,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-10-04 09:11:27,426 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 94 states. [2018-10-04 09:11:27,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:11:27,650 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-10-04 09:11:27,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-10-04 09:11:27,651 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 94 [2018-10-04 09:11:27,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:11:27,651 INFO L225 Difference]: With dead ends: 98 [2018-10-04 09:11:27,651 INFO L226 Difference]: Without dead ends: 96 [2018-10-04 09:11:27,652 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-10-04 09:11:27,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-10-04 09:11:27,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-10-04 09:11:27,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-10-04 09:11:27,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-10-04 09:11:27,654 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2018-10-04 09:11:27,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:11:27,654 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-10-04 09:11:27,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-10-04 09:11:27,654 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-10-04 09:11:27,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-10-04 09:11:27,654 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:11:27,654 INFO L375 BasicCegarLoop]: trace histogram [92, 1, 1, 1] [2018-10-04 09:11:27,655 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:11:27,655 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:11:27,655 INFO L82 PathProgramCache]: Analyzing trace with hash -513869629, now seen corresponding path program 92 times [2018-10-04 09:11:27,655 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:11:27,655 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:11:27,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:11:27,656 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:11:27,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:11:27,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:11:30,977 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:11:30,977 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:11:30,977 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:11:30,984 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:11:31,055 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:11:31,055 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:11:31,058 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:11:31,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:11:31,097 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:11:31,097 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-10-04 09:11:31,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-10-04 09:11:31,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-10-04 09:11:31,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-10-04 09:11:31,098 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 95 states. [2018-10-04 09:11:31,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:11:31,294 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-10-04 09:11:31,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-10-04 09:11:31,295 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 95 [2018-10-04 09:11:31,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:11:31,295 INFO L225 Difference]: With dead ends: 99 [2018-10-04 09:11:31,295 INFO L226 Difference]: Without dead ends: 97 [2018-10-04 09:11:31,296 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-10-04 09:11:31,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-10-04 09:11:31,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-10-04 09:11:31,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-10-04 09:11:31,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-10-04 09:11:31,298 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2018-10-04 09:11:31,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:11:31,298 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-10-04 09:11:31,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-10-04 09:11:31,298 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-10-04 09:11:31,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-10-04 09:11:31,298 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:11:31,298 INFO L375 BasicCegarLoop]: trace histogram [93, 1, 1, 1] [2018-10-04 09:11:31,299 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:11:31,299 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:11:31,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1249912492, now seen corresponding path program 93 times [2018-10-04 09:11:31,299 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:11:31,299 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:11:31,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:11:31,300 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:11:31,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:11:31,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:11:35,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:11:35,423 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:11:35,423 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:11:35,430 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:11:35,543 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-10-04 09:11:35,543 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:11:35,546 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:11:35,568 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:11:35,591 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:11:35,592 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-10-04 09:11:35,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-04 09:11:35,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-04 09:11:35,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-10-04 09:11:35,593 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 96 states. [2018-10-04 09:11:35,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:11:35,788 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2018-10-04 09:11:35,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-04 09:11:35,789 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 96 [2018-10-04 09:11:35,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:11:35,789 INFO L225 Difference]: With dead ends: 100 [2018-10-04 09:11:35,790 INFO L226 Difference]: Without dead ends: 98 [2018-10-04 09:11:35,790 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-10-04 09:11:35,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-10-04 09:11:35,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-10-04 09:11:35,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-04 09:11:35,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-10-04 09:11:35,792 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2018-10-04 09:11:35,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:11:35,793 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-10-04 09:11:35,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-04 09:11:35,793 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-10-04 09:11:35,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-10-04 09:11:35,794 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:11:35,794 INFO L375 BasicCegarLoop]: trace histogram [94, 1, 1, 1] [2018-10-04 09:11:35,794 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:11:35,794 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:11:35,795 INFO L82 PathProgramCache]: Analyzing trace with hash 92583395, now seen corresponding path program 94 times [2018-10-04 09:11:35,795 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:11:35,795 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:11:35,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:11:35,795 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:11:35,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:11:35,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:11:38,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:11:38,943 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:11:38,943 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:11:38,951 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:11:39,026 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:11:39,026 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:11:39,029 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:11:39,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:11:39,082 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:11:39,082 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-10-04 09:11:39,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-10-04 09:11:39,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-10-04 09:11:39,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-10-04 09:11:39,084 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 97 states. [2018-10-04 09:11:39,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:11:39,351 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-10-04 09:11:39,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-10-04 09:11:39,351 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 97 [2018-10-04 09:11:39,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:11:39,352 INFO L225 Difference]: With dead ends: 101 [2018-10-04 09:11:39,352 INFO L226 Difference]: Without dead ends: 99 [2018-10-04 09:11:39,352 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-10-04 09:11:39,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-04 09:11:39,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-10-04 09:11:39,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-10-04 09:11:39,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-10-04 09:11:39,355 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2018-10-04 09:11:39,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:11:39,355 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-10-04 09:11:39,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-10-04 09:11:39,355 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-10-04 09:11:39,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-04 09:11:39,356 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:11:39,356 INFO L375 BasicCegarLoop]: trace histogram [95, 1, 1, 1] [2018-10-04 09:11:39,356 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:11:39,357 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:11:39,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1424880244, now seen corresponding path program 95 times [2018-10-04 09:11:39,358 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:11:39,358 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:11:39,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:11:39,359 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:11:39,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:11:39,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:11:42,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:11:42,923 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:11:42,923 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:11:42,931 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:11:43,041 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-10-04 09:11:43,042 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:11:43,045 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:11:43,064 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:11:43,084 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:11:43,084 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-10-04 09:11:43,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-10-04 09:11:43,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-10-04 09:11:43,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-10-04 09:11:43,086 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 98 states. [2018-10-04 09:11:43,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:11:43,700 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2018-10-04 09:11:43,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-10-04 09:11:43,701 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 98 [2018-10-04 09:11:43,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:11:43,701 INFO L225 Difference]: With dead ends: 102 [2018-10-04 09:11:43,701 INFO L226 Difference]: Without dead ends: 100 [2018-10-04 09:11:43,702 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-10-04 09:11:43,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-10-04 09:11:43,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-10-04 09:11:43,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-04 09:11:43,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-10-04 09:11:43,704 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2018-10-04 09:11:43,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:11:43,704 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-10-04 09:11:43,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-10-04 09:11:43,704 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-10-04 09:11:43,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-10-04 09:11:43,705 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:11:43,705 INFO L375 BasicCegarLoop]: trace histogram [96, 1, 1, 1] [2018-10-04 09:11:43,705 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:11:43,705 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:11:43,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1221612797, now seen corresponding path program 96 times [2018-10-04 09:11:43,706 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:11:43,706 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:11:43,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:11:43,706 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:11:43,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:11:43,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:11:47,237 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:11:47,237 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:11:47,237 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:11:47,246 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:11:47,354 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-10-04 09:11:47,354 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:11:47,357 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:11:47,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:11:47,396 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:11:47,396 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-10-04 09:11:47,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-10-04 09:11:47,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-10-04 09:11:47,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-10-04 09:11:47,397 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 99 states. [2018-10-04 09:11:47,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:11:47,655 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-10-04 09:11:47,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-10-04 09:11:47,655 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 99 [2018-10-04 09:11:47,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:11:47,656 INFO L225 Difference]: With dead ends: 103 [2018-10-04 09:11:47,656 INFO L226 Difference]: Without dead ends: 101 [2018-10-04 09:11:47,656 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-10-04 09:11:47,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-04 09:11:47,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-10-04 09:11:47,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-04 09:11:47,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-10-04 09:11:47,659 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2018-10-04 09:11:47,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:11:47,659 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-10-04 09:11:47,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-10-04 09:11:47,659 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-10-04 09:11:47,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-04 09:11:47,660 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:11:47,660 INFO L375 BasicCegarLoop]: trace histogram [97, 1, 1, 1] [2018-10-04 09:11:47,660 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:11:47,660 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:11:47,660 INFO L82 PathProgramCache]: Analyzing trace with hash 784710764, now seen corresponding path program 97 times [2018-10-04 09:11:47,660 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:11:47,660 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:11:47,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:11:47,661 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:11:47,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:11:47,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:11:51,107 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:11:51,107 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:11:51,107 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:11:51,114 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:11:51,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:11:51,193 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:11:51,211 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:11:51,230 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:11:51,230 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-10-04 09:11:51,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-10-04 09:11:51,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-10-04 09:11:51,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-10-04 09:11:51,232 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 100 states. [2018-10-04 09:11:51,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:11:51,490 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2018-10-04 09:11:51,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-10-04 09:11:51,490 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 100 [2018-10-04 09:11:51,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:11:51,491 INFO L225 Difference]: With dead ends: 104 [2018-10-04 09:11:51,491 INFO L226 Difference]: Without dead ends: 102 [2018-10-04 09:11:51,491 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-10-04 09:11:51,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-10-04 09:11:51,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-10-04 09:11:51,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-10-04 09:11:51,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-10-04 09:11:51,493 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2018-10-04 09:11:51,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:11:51,494 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-10-04 09:11:51,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-10-04 09:11:51,494 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-10-04 09:11:51,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-10-04 09:11:51,494 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:11:51,494 INFO L375 BasicCegarLoop]: trace histogram [98, 1, 1, 1] [2018-10-04 09:11:51,495 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:11:51,495 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:11:51,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1443768285, now seen corresponding path program 98 times [2018-10-04 09:11:51,495 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:11:51,495 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:11:51,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:11:51,495 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:11:51,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:11:51,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:11:54,924 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:11:54,925 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:11:54,925 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:11:54,932 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:11:55,009 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:11:55,009 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:11:55,013 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:11:55,033 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:11:55,054 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:11:55,054 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-10-04 09:11:55,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-10-04 09:11:55,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-10-04 09:11:55,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-10-04 09:11:55,055 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 101 states. [2018-10-04 09:11:55,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:11:55,256 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-10-04 09:11:55,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-10-04 09:11:55,257 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 101 [2018-10-04 09:11:55,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:11:55,257 INFO L225 Difference]: With dead ends: 105 [2018-10-04 09:11:55,257 INFO L226 Difference]: Without dead ends: 103 [2018-10-04 09:11:55,258 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-10-04 09:11:55,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-04 09:11:55,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-10-04 09:11:55,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-04 09:11:55,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-10-04 09:11:55,260 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101 [2018-10-04 09:11:55,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:11:55,260 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-10-04 09:11:55,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-10-04 09:11:55,260 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-10-04 09:11:55,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-04 09:11:55,261 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:11:55,261 INFO L375 BasicCegarLoop]: trace histogram [99, 1, 1, 1] [2018-10-04 09:11:55,261 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:11:55,261 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:11:55,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1807142068, now seen corresponding path program 99 times [2018-10-04 09:11:55,261 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:11:55,261 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:11:55,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:11:55,262 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:11:55,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:11:55,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:11:59,012 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:11:59,013 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:11:59,013 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:11:59,020 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:11:59,135 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2018-10-04 09:11:59,136 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:11:59,139 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:11:59,169 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:11:59,190 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:11:59,190 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-10-04 09:11:59,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-10-04 09:11:59,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-10-04 09:11:59,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-10-04 09:11:59,191 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 102 states. [2018-10-04 09:11:59,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:11:59,459 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2018-10-04 09:11:59,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-10-04 09:11:59,459 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 102 [2018-10-04 09:11:59,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:11:59,460 INFO L225 Difference]: With dead ends: 106 [2018-10-04 09:11:59,460 INFO L226 Difference]: Without dead ends: 104 [2018-10-04 09:11:59,460 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-10-04 09:11:59,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-10-04 09:11:59,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-10-04 09:11:59,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-10-04 09:11:59,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-10-04 09:11:59,463 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102 [2018-10-04 09:11:59,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:11:59,463 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-10-04 09:11:59,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-10-04 09:11:59,463 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-10-04 09:11:59,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-10-04 09:11:59,464 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:11:59,464 INFO L375 BasicCegarLoop]: trace histogram [100, 1, 1, 1] [2018-10-04 09:11:59,464 INFO L423 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:11:59,464 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:11:59,464 INFO L82 PathProgramCache]: Analyzing trace with hash -186827453, now seen corresponding path program 100 times [2018-10-04 09:11:59,465 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:11:59,465 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:11:59,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:11:59,465 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:11:59,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:11:59,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:03,326 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:03,326 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:03,326 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:12:03,334 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:12:03,408 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:12:03,408 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:03,411 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:03,431 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:03,450 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:03,450 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-10-04 09:12:03,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-10-04 09:12:03,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-10-04 09:12:03,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-10-04 09:12:03,452 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 103 states. [2018-10-04 09:12:03,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:03,637 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-10-04 09:12:03,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-10-04 09:12:03,637 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 103 [2018-10-04 09:12:03,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:03,638 INFO L225 Difference]: With dead ends: 107 [2018-10-04 09:12:03,639 INFO L226 Difference]: Without dead ends: 105 [2018-10-04 09:12:03,639 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-10-04 09:12:03,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-10-04 09:12:03,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-10-04 09:12:03,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-04 09:12:03,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-10-04 09:12:03,643 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 103 [2018-10-04 09:12:03,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:03,643 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-10-04 09:12:03,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-10-04 09:12:03,643 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-10-04 09:12:03,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-04 09:12:03,644 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:03,644 INFO L375 BasicCegarLoop]: trace histogram [101, 1, 1, 1] [2018-10-04 09:12:03,644 INFO L423 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:03,644 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:03,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1496681940, now seen corresponding path program 101 times [2018-10-04 09:12:03,645 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:03,645 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:03,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:03,645 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:03,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:03,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:07,510 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:07,510 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:07,510 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:12:07,518 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:12:07,648 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2018-10-04 09:12:07,648 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:07,652 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:07,672 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:07,693 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:07,693 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-10-04 09:12:07,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-10-04 09:12:07,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-10-04 09:12:07,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-10-04 09:12:07,695 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 104 states. [2018-10-04 09:12:07,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:07,934 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2018-10-04 09:12:07,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-10-04 09:12:07,934 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 104 [2018-10-04 09:12:07,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:07,935 INFO L225 Difference]: With dead ends: 108 [2018-10-04 09:12:07,935 INFO L226 Difference]: Without dead ends: 106 [2018-10-04 09:12:07,936 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-10-04 09:12:07,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-10-04 09:12:07,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-10-04 09:12:07,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-10-04 09:12:07,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-10-04 09:12:07,938 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 104 [2018-10-04 09:12:07,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:07,939 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-10-04 09:12:07,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-10-04 09:12:07,939 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-10-04 09:12:07,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-10-04 09:12:07,939 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:07,940 INFO L375 BasicCegarLoop]: trace histogram [102, 1, 1, 1] [2018-10-04 09:12:07,940 INFO L423 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:07,940 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:07,940 INFO L82 PathProgramCache]: Analyzing trace with hash 847501923, now seen corresponding path program 102 times [2018-10-04 09:12:07,940 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:07,940 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:07,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:07,941 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:07,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:07,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:11,949 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:11,950 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:11,950 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:12:11,957 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:12:12,072 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2018-10-04 09:12:12,072 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:12,075 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:12,097 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:12,117 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:12,118 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-10-04 09:12:12,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-10-04 09:12:12,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-10-04 09:12:12,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-10-04 09:12:12,120 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 105 states. [2018-10-04 09:12:12,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:12,408 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-10-04 09:12:12,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-10-04 09:12:12,408 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 105 [2018-10-04 09:12:12,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:12,409 INFO L225 Difference]: With dead ends: 109 [2018-10-04 09:12:12,409 INFO L226 Difference]: Without dead ends: 107 [2018-10-04 09:12:12,410 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-10-04 09:12:12,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-04 09:12:12,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-10-04 09:12:12,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-04 09:12:12,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-10-04 09:12:12,412 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 105 [2018-10-04 09:12:12,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:12,412 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-10-04 09:12:12,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-10-04 09:12:12,412 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-10-04 09:12:12,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-04 09:12:12,413 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:12,413 INFO L375 BasicCegarLoop]: trace histogram [103, 1, 1, 1] [2018-10-04 09:12:12,413 INFO L423 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:12,413 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:12,413 INFO L82 PathProgramCache]: Analyzing trace with hash 502757644, now seen corresponding path program 103 times [2018-10-04 09:12:12,413 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:12,414 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:12,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:12,414 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:12,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:12,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:16,212 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:16,213 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:16,213 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:12:16,219 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:12:16,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:16,303 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:16,333 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:16,356 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:16,356 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-10-04 09:12:16,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-10-04 09:12:16,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-10-04 09:12:16,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-10-04 09:12:16,358 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 106 states. [2018-10-04 09:12:16,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:16,686 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2018-10-04 09:12:16,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-10-04 09:12:16,687 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 106 [2018-10-04 09:12:16,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:16,687 INFO L225 Difference]: With dead ends: 110 [2018-10-04 09:12:16,687 INFO L226 Difference]: Without dead ends: 108 [2018-10-04 09:12:16,688 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-10-04 09:12:16,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-10-04 09:12:16,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-10-04 09:12:16,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-10-04 09:12:16,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-10-04 09:12:16,690 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 106 [2018-10-04 09:12:16,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:16,690 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-10-04 09:12:16,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-10-04 09:12:16,690 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-10-04 09:12:16,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-04 09:12:16,690 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:16,690 INFO L375 BasicCegarLoop]: trace histogram [104, 1, 1, 1] [2018-10-04 09:12:16,691 INFO L423 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:16,691 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:16,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1594380413, now seen corresponding path program 104 times [2018-10-04 09:12:16,691 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:16,691 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:16,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:16,692 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:12:16,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:16,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:20,847 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:20,847 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:20,847 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:12:20,854 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:12:20,938 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:12:20,938 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:20,942 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:20,985 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:21,015 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:21,015 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106 [2018-10-04 09:12:21,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-10-04 09:12:21,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-10-04 09:12:21,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-10-04 09:12:21,017 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 107 states. [2018-10-04 09:12:21,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:21,347 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-10-04 09:12:21,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-10-04 09:12:21,347 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 107 [2018-10-04 09:12:21,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:21,348 INFO L225 Difference]: With dead ends: 111 [2018-10-04 09:12:21,348 INFO L226 Difference]: Without dead ends: 109 [2018-10-04 09:12:21,348 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-10-04 09:12:21,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-10-04 09:12:21,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-10-04 09:12:21,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-10-04 09:12:21,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-10-04 09:12:21,351 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 107 [2018-10-04 09:12:21,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:21,351 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-10-04 09:12:21,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-10-04 09:12:21,351 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-10-04 09:12:21,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-04 09:12:21,352 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:21,352 INFO L375 BasicCegarLoop]: trace histogram [105, 1, 1, 1] [2018-10-04 09:12:21,352 INFO L423 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:21,352 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:21,352 INFO L82 PathProgramCache]: Analyzing trace with hash 2113816556, now seen corresponding path program 105 times [2018-10-04 09:12:21,352 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:21,353 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:21,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:21,353 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:21,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:21,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:25,309 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:25,309 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:25,310 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:12:25,316 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:12:25,441 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2018-10-04 09:12:25,441 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:25,444 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:25,467 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:25,487 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:25,488 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-10-04 09:12:25,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-10-04 09:12:25,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-10-04 09:12:25,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-10-04 09:12:25,489 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 108 states. [2018-10-04 09:12:25,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:25,805 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2018-10-04 09:12:25,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-10-04 09:12:25,806 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 108 [2018-10-04 09:12:25,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:25,806 INFO L225 Difference]: With dead ends: 112 [2018-10-04 09:12:25,806 INFO L226 Difference]: Without dead ends: 110 [2018-10-04 09:12:25,807 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-10-04 09:12:25,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-10-04 09:12:25,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-10-04 09:12:25,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-10-04 09:12:25,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-10-04 09:12:25,809 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 108 [2018-10-04 09:12:25,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:25,809 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-10-04 09:12:25,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-10-04 09:12:25,809 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-10-04 09:12:25,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-10-04 09:12:25,809 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:25,810 INFO L375 BasicCegarLoop]: trace histogram [106, 1, 1, 1] [2018-10-04 09:12:25,810 INFO L423 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:25,810 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:25,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1103805603, now seen corresponding path program 106 times [2018-10-04 09:12:25,810 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:25,810 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:25,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:25,811 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:25,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:25,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:30,035 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:30,035 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:30,035 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:12:30,043 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:12:30,127 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:12:30,128 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:30,131 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:30,153 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:30,174 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:30,174 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 108 [2018-10-04 09:12:30,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-10-04 09:12:30,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-10-04 09:12:30,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-10-04 09:12:30,176 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 109 states. [2018-10-04 09:12:30,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:30,515 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-10-04 09:12:30,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-10-04 09:12:30,515 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 109 [2018-10-04 09:12:30,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:30,516 INFO L225 Difference]: With dead ends: 113 [2018-10-04 09:12:30,516 INFO L226 Difference]: Without dead ends: 111 [2018-10-04 09:12:30,516 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-10-04 09:12:30,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-04 09:12:30,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-10-04 09:12:30,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-10-04 09:12:30,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-10-04 09:12:30,519 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 109 [2018-10-04 09:12:30,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:30,519 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-10-04 09:12:30,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-10-04 09:12:30,519 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-10-04 09:12:30,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-04 09:12:30,520 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:30,520 INFO L375 BasicCegarLoop]: trace histogram [107, 1, 1, 1] [2018-10-04 09:12:30,520 INFO L423 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:30,520 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:30,520 INFO L82 PathProgramCache]: Analyzing trace with hash -141762868, now seen corresponding path program 107 times [2018-10-04 09:12:30,520 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:30,520 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:30,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:30,521 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:30,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:30,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:35,355 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:35,355 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:35,355 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:12:35,363 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:12:35,494 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2018-10-04 09:12:35,494 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:35,499 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:35,520 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:35,542 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:35,542 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109] total 109 [2018-10-04 09:12:35,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-10-04 09:12:35,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-10-04 09:12:35,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-10-04 09:12:35,543 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 110 states. [2018-10-04 09:12:35,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:35,864 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2018-10-04 09:12:35,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-10-04 09:12:35,864 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 110 [2018-10-04 09:12:35,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:35,864 INFO L225 Difference]: With dead ends: 114 [2018-10-04 09:12:35,864 INFO L226 Difference]: Without dead ends: 112 [2018-10-04 09:12:35,865 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-10-04 09:12:35,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-10-04 09:12:35,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-10-04 09:12:35,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-04 09:12:35,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-10-04 09:12:35,867 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 110 [2018-10-04 09:12:35,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:35,868 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-10-04 09:12:35,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-10-04 09:12:35,868 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-10-04 09:12:35,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-10-04 09:12:35,868 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:35,868 INFO L375 BasicCegarLoop]: trace histogram [108, 1, 1, 1] [2018-10-04 09:12:35,869 INFO L423 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:35,869 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:35,869 INFO L82 PathProgramCache]: Analyzing trace with hash -99679805, now seen corresponding path program 108 times [2018-10-04 09:12:35,869 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:35,869 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:35,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:35,870 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:35,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:35,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:40,295 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 0 proven. 5886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:40,296 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:40,296 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:12:40,303 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:12:40,425 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-10-04 09:12:40,425 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:40,430 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:40,453 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 0 proven. 5886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:40,473 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:40,473 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 110] total 110 [2018-10-04 09:12:40,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 111 states [2018-10-04 09:12:40,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2018-10-04 09:12:40,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-10-04 09:12:40,475 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 111 states. [2018-10-04 09:12:40,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:40,801 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-10-04 09:12:40,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-10-04 09:12:40,802 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 111 [2018-10-04 09:12:40,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:40,802 INFO L225 Difference]: With dead ends: 115 [2018-10-04 09:12:40,802 INFO L226 Difference]: Without dead ends: 113 [2018-10-04 09:12:40,802 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-10-04 09:12:40,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-04 09:12:40,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-10-04 09:12:40,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-10-04 09:12:40,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-10-04 09:12:40,805 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 111 [2018-10-04 09:12:40,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:40,805 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-10-04 09:12:40,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has 111 states. [2018-10-04 09:12:40,805 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-10-04 09:12:40,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-04 09:12:40,806 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:40,806 INFO L375 BasicCegarLoop]: trace histogram [109, 1, 1, 1] [2018-10-04 09:12:40,806 INFO L423 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:40,807 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:40,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1204895148, now seen corresponding path program 109 times [2018-10-04 09:12:40,807 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:40,807 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:40,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:40,808 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:40,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:40,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:45,352 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:45,353 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:45,353 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:12:45,360 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:12:45,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:45,453 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:45,475 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:45,496 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:45,496 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 111] total 111 [2018-10-04 09:12:45,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-10-04 09:12:45,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-10-04 09:12:45,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2018-10-04 09:12:45,498 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 112 states. [2018-10-04 09:12:45,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:45,791 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2018-10-04 09:12:45,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-10-04 09:12:45,791 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 112 [2018-10-04 09:12:45,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:45,791 INFO L225 Difference]: With dead ends: 116 [2018-10-04 09:12:45,792 INFO L226 Difference]: Without dead ends: 114 [2018-10-04 09:12:45,792 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2018-10-04 09:12:45,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-10-04 09:12:45,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-10-04 09:12:45,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-10-04 09:12:45,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2018-10-04 09:12:45,795 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 112 [2018-10-04 09:12:45,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:45,795 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2018-10-04 09:12:45,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-10-04 09:12:45,796 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2018-10-04 09:12:45,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-10-04 09:12:45,796 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:45,796 INFO L375 BasicCegarLoop]: trace histogram [110, 1, 1, 1] [2018-10-04 09:12:45,796 INFO L423 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:45,797 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:45,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1302954269, now seen corresponding path program 110 times [2018-10-04 09:12:45,797 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:45,797 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:45,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:45,798 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:12:45,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:45,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:50,759 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:50,759 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:50,759 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:12:50,766 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:12:50,853 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:12:50,853 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:50,857 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:50,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:50,913 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:50,914 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 112] total 112 [2018-10-04 09:12:50,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-10-04 09:12:50,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-10-04 09:12:50,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2018-10-04 09:12:50,915 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 113 states. [2018-10-04 09:12:51,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:51,241 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-10-04 09:12:51,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-10-04 09:12:51,241 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 113 [2018-10-04 09:12:51,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:51,242 INFO L225 Difference]: With dead ends: 117 [2018-10-04 09:12:51,242 INFO L226 Difference]: Without dead ends: 115 [2018-10-04 09:12:51,242 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2018-10-04 09:12:51,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-10-04 09:12:51,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-10-04 09:12:51,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-04 09:12:51,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-10-04 09:12:51,245 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 113 [2018-10-04 09:12:51,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:51,245 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-10-04 09:12:51,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-10-04 09:12:51,245 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-10-04 09:12:51,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-04 09:12:51,246 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:51,246 INFO L375 BasicCegarLoop]: trace histogram [111, 1, 1, 1] [2018-10-04 09:12:51,246 INFO L423 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:51,246 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:51,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1736874868, now seen corresponding path program 111 times [2018-10-04 09:12:51,247 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:51,247 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:51,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:51,247 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:51,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:51,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-10-04 09:12:54,744 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-04 09:12:54,748 WARN L205 ceAbstractionStarter]: Timeout [2018-10-04 09:12:54,749 INFO L202 PluginConnector]: Adding new model const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.10 09:12:54 BoogieIcfgContainer [2018-10-04 09:12:54,749 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-04 09:12:54,749 INFO L168 Benchmark]: Toolchain (without parser) took 234017.37 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -136.8 MB). Free memory was 1.5 GB in the beginning and 925.8 MB in the end (delta: 538.8 MB). Peak memory consumption was 402.0 MB. Max. memory is 7.1 GB. [2018-10-04 09:12:54,751 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 09:12:54,751 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.61 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 09:12:54,751 INFO L168 Benchmark]: Boogie Preprocessor took 22.68 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 09:12:54,751 INFO L168 Benchmark]: RCFGBuilder took 265.36 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-04 09:12:54,752 INFO L168 Benchmark]: TraceAbstraction took 233680.00 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -136.8 MB). Free memory was 1.4 GB in the beginning and 925.8 MB in the end (delta: 517.7 MB). Peak memory consumption was 380.8 MB. Max. memory is 7.1 GB. [2018-10-04 09:12:54,756 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 44.61 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 22.68 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 265.36 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 233680.00 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -136.8 MB). Free memory was 1.4 GB in the beginning and 925.8 MB in the end (delta: 517.7 MB). Peak memory consumption was 380.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 37]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 37). Cancelled while BasicCegarLoop was analyzing trace of length 115 with TraceHistMax 111, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 95 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 233.6s OverallTime, 112 OverallIterations, 111 TraceHistogramMax, 22.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 334 SDtfs, 0 SDslu, 4870 SDs, 0 SdLazy, 11196 SolverSat, 164 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 16.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12652 GetRequests, 6436 SyntacticMatches, 0 SemanticMatches, 6216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 191.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=115occurred in iteration=111, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 111 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.0s SsaConstructionTime, 6.2s SatisfiabilityAnalysisTime, 195.5s InterpolantComputationTime, 12873 NumberOfCodeBlocks, 12873 NumberOfCodeBlocksAsserted, 1779 NumberOfCheckSat, 12652 ConstructedInterpolants, 0 QuantifiedInterpolants, 2822278 SizeOfPredicates, 110 NumberOfNonLiveVariables, 38610 ConjunctsInSsa, 6325 ConjunctsInUnsatCore, 221 InterpolantComputations, 1 PerfectInterpolantSequences, 0/455840 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/const1.i_3.bplTransformedIcfg_BEv2_6.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-04_09-12-54-766.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/const1.i_3.bplTransformedIcfg_BEv2_6.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-04_09-12-54-766.csv Completed graceful shutdown