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/overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-b2fde6a [2018-09-28 10:00:34,690 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-28 10:00:34,692 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-28 10:00:34,704 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-28 10:00:34,704 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-28 10:00:34,705 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-28 10:00:34,707 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-28 10:00:34,708 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-28 10:00:34,710 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-28 10:00:34,711 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-28 10:00:34,712 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-28 10:00:34,712 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-28 10:00:34,713 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-28 10:00:34,714 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-28 10:00:34,716 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-28 10:00:34,717 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-28 10:00:34,717 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-28 10:00:34,719 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-28 10:00:34,722 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-28 10:00:34,723 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-28 10:00:34,724 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-28 10:00:34,726 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-28 10:00:34,728 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-09-28 10:00:34,738 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-28 10:00:34,754 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-28 10:00:34,754 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-28 10:00:34,755 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-28 10:00:34,755 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-28 10:00:34,756 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-28 10:00:34,756 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-28 10:00:34,756 INFO L133 SettingsManager]: * Use SBE=true [2018-09-28 10:00:34,756 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-28 10:00:34,756 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-28 10:00:34,757 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-28 10:00:34,757 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-28 10:00:34,757 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-28 10:00:34,757 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-28 10:00:34,757 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-28 10:00:34,758 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-28 10:00:34,758 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-28 10:00:34,758 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-28 10:00:34,758 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-28 10:00:34,758 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-28 10:00:34,759 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-28 10:00:34,759 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-28 10:00:34,759 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-28 10:00:34,759 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-28 10:00:34,759 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-28 10:00:34,760 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-28 10:00:34,760 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-28 10:00:34,760 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-28 10:00:34,760 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-28 10:00:34,761 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-28 10:00:34,761 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-28 10:00:34,818 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-28 10:00:34,831 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-28 10:00:34,837 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-28 10:00:34,839 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-28 10:00:34,839 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-28 10:00:34,840 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl [2018-09-28 10:00:34,841 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl' [2018-09-28 10:00:34,894 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-28 10:00:34,897 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-28 10:00:34,898 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-28 10:00:34,898 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-28 10:00:34,898 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-28 10:00:34,920 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:00:34" (1/1) ... [2018-09-28 10:00:34,932 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:00:34" (1/1) ... [2018-09-28 10:00:34,940 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-28 10:00:34,941 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-28 10:00:34,941 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-28 10:00:34,942 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-28 10:00:34,953 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:00:34" (1/1) ... [2018-09-28 10:00:34,954 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:00:34" (1/1) ... [2018-09-28 10:00:34,954 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:00:34" (1/1) ... [2018-09-28 10:00:34,955 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:00:34" (1/1) ... [2018-09-28 10:00:34,957 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:00:34" (1/1) ... [2018-09-28 10:00:34,961 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:00:34" (1/1) ... [2018-09-28 10:00:34,963 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:00:34" (1/1) ... [2018-09-28 10:00:34,964 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-28 10:00:34,965 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-28 10:00:34,965 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-28 10:00:34,965 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-28 10:00:34,966 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:00:34" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-28 10:00:35,047 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-09-28 10:00:35,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-28 10:00:35,048 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-28 10:00:35,276 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-28 10:00:35,276 INFO L202 PluginConnector]: Adding new model overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.09 10:00:35 BoogieIcfgContainer [2018-09-28 10:00:35,277 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-28 10:00:35,278 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-28 10:00:35,278 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-28 10:00:35,283 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-28 10:00:35,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:00:34" (1/2) ... [2018-09-28 10:00:35,285 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67d02a3d and model type overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.09 10:00:35, skipping insertion in model container [2018-09-28 10:00:35,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.09 10:00:35" (2/2) ... [2018-09-28 10:00:35,288 INFO L112 eAbstractionObserver]: Analyzing ICFG overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl [2018-09-28 10:00:35,299 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-28 10:00:35,309 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-28 10:00:35,372 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-28 10:00:35,373 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-28 10:00:35,374 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-28 10:00:35,374 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-28 10:00:35,374 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-28 10:00:35,374 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-28 10:00:35,375 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-28 10:00:35,375 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-28 10:00:35,375 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-28 10:00:35,394 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-09-28 10:00:35,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-28 10:00:35,411 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:35,412 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-28 10:00:35,414 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:35,420 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:35,421 INFO L82 PathProgramCache]: Analyzing trace with hash 30017, now seen corresponding path program 1 times [2018-09-28 10:00:35,423 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:35,424 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:35,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:35,486 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:00:35,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:35,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:35,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:35,640 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-28 10:00:35,640 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-28 10:00:35,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-28 10:00:35,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-28 10:00:35,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-28 10:00:35,661 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-09-28 10:00:35,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:35,704 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2018-09-28 10:00:35,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-28 10:00:35,706 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-28 10:00:35,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:35,718 INFO L225 Difference]: With dead ends: 9 [2018-09-28 10:00:35,718 INFO L226 Difference]: Without dead ends: 5 [2018-09-28 10:00:35,722 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 [2018-09-28 10:00:35,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-09-28 10:00:35,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-09-28 10:00:35,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-09-28 10:00:35,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-09-28 10:00:35,761 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-09-28 10:00:35,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:35,761 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-09-28 10:00:35,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-28 10:00:35,762 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-09-28 10:00:35,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-28 10:00:35,762 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:35,762 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-28 10:00:35,763 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:35,763 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:35,763 INFO L82 PathProgramCache]: Analyzing trace with hash 928552, now seen corresponding path program 1 times [2018-09-28 10:00:35,763 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:35,764 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:35,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:35,771 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:00:35,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:35,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:35,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:35,871 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:35,871 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:00:35,893 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:00:35,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:35,950 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:35,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:36,023 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:36,023 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-28 10:00:36,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-28 10:00:36,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-28 10:00:36,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-28 10:00:36,025 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 4 states. [2018-09-28 10:00:36,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:36,126 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-09-28 10:00:36,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-28 10:00:36,127 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-09-28 10:00:36,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:36,128 INFO L225 Difference]: With dead ends: 8 [2018-09-28 10:00:36,128 INFO L226 Difference]: Without dead ends: 6 [2018-09-28 10:00:36,129 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 [2018-09-28 10:00:36,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-28 10:00:36,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-28 10:00:36,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-28 10:00:36,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-28 10:00:36,132 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-09-28 10:00:36,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:36,132 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-28 10:00:36,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-28 10:00:36,132 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-28 10:00:36,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-28 10:00:36,133 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:36,133 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-09-28 10:00:36,136 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:36,136 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:36,136 INFO L82 PathProgramCache]: Analyzing trace with hash 28783137, now seen corresponding path program 2 times [2018-09-28 10:00:36,136 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:36,137 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:36,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:36,138 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:00:36,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:36,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:36,322 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:36,322 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:36,323 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:00:36,338 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:00:36,362 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:00:36,362 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:36,365 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:36,374 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:36,400 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:36,401 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-28 10:00:36,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-28 10:00:36,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-28 10:00:36,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-28 10:00:36,402 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 5 states. [2018-09-28 10:00:36,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:36,458 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-28 10:00:36,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-28 10:00:36,459 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2018-09-28 10:00:36,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:36,459 INFO L225 Difference]: With dead ends: 9 [2018-09-28 10:00:36,459 INFO L226 Difference]: Without dead ends: 7 [2018-09-28 10:00:36,460 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-28 10:00:36,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-28 10:00:36,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-28 10:00:36,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-28 10:00:36,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-28 10:00:36,463 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-09-28 10:00:36,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:36,463 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-28 10:00:36,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-28 10:00:36,464 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-28 10:00:36,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-28 10:00:36,464 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:36,464 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2018-09-28 10:00:36,465 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:36,465 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:36,466 INFO L82 PathProgramCache]: Analyzing trace with hash 892275272, now seen corresponding path program 3 times [2018-09-28 10:00:36,466 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:36,466 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:36,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:36,468 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:36,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:36,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:36,582 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:36,582 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:36,583 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:00:36,595 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:00:36,616 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-28 10:00:36,616 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:36,618 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:36,624 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:36,645 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:36,645 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-28 10:00:36,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-28 10:00:36,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-28 10:00:36,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-28 10:00:36,646 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2018-09-28 10:00:36,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:36,699 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-09-28 10:00:36,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-28 10:00:36,703 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2018-09-28 10:00:36,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:36,704 INFO L225 Difference]: With dead ends: 10 [2018-09-28 10:00:36,704 INFO L226 Difference]: Without dead ends: 8 [2018-09-28 10:00:36,705 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 [2018-09-28 10:00:36,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-28 10:00:36,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-28 10:00:36,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-28 10:00:36,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-09-28 10:00:36,708 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-09-28 10:00:36,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:36,708 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-09-28 10:00:36,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-28 10:00:36,709 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-09-28 10:00:36,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-28 10:00:36,709 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:36,709 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1, 1] [2018-09-28 10:00:36,710 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:36,710 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:36,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1890727681, now seen corresponding path program 4 times [2018-09-28 10:00:36,710 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:36,711 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:36,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:36,712 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:36,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:36,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:36,977 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:36,977 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:36,977 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:00:36,991 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:00:37,027 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:00:37,027 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:37,029 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:37,036 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:37,066 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:37,066 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-28 10:00:37,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-28 10:00:37,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-28 10:00:37,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-28 10:00:37,068 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 7 states. [2018-09-28 10:00:37,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:37,107 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-28 10:00:37,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-28 10:00:37,108 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-09-28 10:00:37,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:37,109 INFO L225 Difference]: With dead ends: 11 [2018-09-28 10:00:37,109 INFO L226 Difference]: Without dead ends: 9 [2018-09-28 10:00:37,110 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 [2018-09-28 10:00:37,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-28 10:00:37,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-28 10:00:37,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-28 10:00:37,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-28 10:00:37,114 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-09-28 10:00:37,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:37,114 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-28 10:00:37,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-28 10:00:37,115 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-28 10:00:37,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-28 10:00:37,115 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:37,115 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1] [2018-09-28 10:00:37,116 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:37,116 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:37,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1516986008, now seen corresponding path program 5 times [2018-09-28 10:00:37,116 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:37,116 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:37,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:37,117 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:37,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:37,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:37,237 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:37,238 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:37,238 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:00:37,255 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:00:37,278 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-28 10:00:37,278 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:37,280 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:37,288 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:37,309 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:37,309 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:00:37,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:00:37,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:00:37,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:00:37,311 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 8 states. [2018-09-28 10:00:37,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:37,433 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-09-28 10:00:37,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:00:37,438 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2018-09-28 10:00:37,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:37,439 INFO L225 Difference]: With dead ends: 12 [2018-09-28 10:00:37,439 INFO L226 Difference]: Without dead ends: 10 [2018-09-28 10:00:37,439 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:00:37,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-28 10:00:37,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-28 10:00:37,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-28 10:00:37,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-28 10:00:37,443 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-09-28 10:00:37,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:37,443 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-28 10:00:37,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:00:37,443 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-28 10:00:37,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-28 10:00:37,444 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:37,444 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1, 1] [2018-09-28 10:00:37,445 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:37,445 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:37,445 INFO L82 PathProgramCache]: Analyzing trace with hash 218072033, now seen corresponding path program 6 times [2018-09-28 10:00:37,445 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:37,445 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:37,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:37,447 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:37,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:37,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:37,572 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:37,573 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:37,573 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:00:37,589 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:00:37,618 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-28 10:00:37,619 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:37,620 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:37,629 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:37,652 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:37,653 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:00:37,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:00:37,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:00:37,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:00:37,654 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 9 states. [2018-09-28 10:00:37,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:37,695 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-28 10:00:37,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:00:37,696 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2018-09-28 10:00:37,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:37,697 INFO L225 Difference]: With dead ends: 13 [2018-09-28 10:00:37,697 INFO L226 Difference]: Without dead ends: 11 [2018-09-28 10:00:37,697 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:00:37,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-28 10:00:37,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-28 10:00:37,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-28 10:00:37,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-28 10:00:37,701 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-09-28 10:00:37,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:37,701 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-28 10:00:37,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:00:37,701 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-28 10:00:37,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-28 10:00:37,702 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:37,702 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1, 1] [2018-09-28 10:00:37,702 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:37,703 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:37,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1829703544, now seen corresponding path program 7 times [2018-09-28 10:00:37,703 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:37,703 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:37,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:37,704 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:37,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:37,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:37,877 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:37,877 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:37,878 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:00:37,889 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:00:37,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:37,914 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:37,923 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:37,957 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:37,957 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:00:37,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:00:37,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:00:37,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:00:37,959 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-09-28 10:00:38,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:38,209 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-09-28 10:00:38,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:00:38,210 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2018-09-28 10:00:38,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:38,211 INFO L225 Difference]: With dead ends: 14 [2018-09-28 10:00:38,211 INFO L226 Difference]: Without dead ends: 12 [2018-09-28 10:00:38,212 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:00:38,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-28 10:00:38,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-28 10:00:38,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-28 10:00:38,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-28 10:00:38,215 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-09-28 10:00:38,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:38,215 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-28 10:00:38,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:00:38,215 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-28 10:00:38,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-28 10:00:38,216 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:38,216 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1, 1] [2018-09-28 10:00:38,216 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:38,217 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:38,217 INFO L82 PathProgramCache]: Analyzing trace with hash -886236991, now seen corresponding path program 8 times [2018-09-28 10:00:38,217 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:38,217 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:38,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:38,218 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:00:38,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:38,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:38,464 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:38,464 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:38,465 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:00:38,475 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:00:38,485 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:00:38,486 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:38,487 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:38,502 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:38,523 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:38,524 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:00:38,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:00:38,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:00:38,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:00:38,525 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 11 states. [2018-09-28 10:00:38,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:38,615 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-28 10:00:38,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:00:38,618 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2018-09-28 10:00:38,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:38,619 INFO L225 Difference]: With dead ends: 15 [2018-09-28 10:00:38,619 INFO L226 Difference]: Without dead ends: 13 [2018-09-28 10:00:38,620 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:00:38,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-28 10:00:38,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-28 10:00:38,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-28 10:00:38,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-28 10:00:38,623 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-09-28 10:00:38,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:38,623 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-28 10:00:38,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:00:38,624 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-28 10:00:38,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-28 10:00:38,624 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:38,624 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1, 1] [2018-09-28 10:00:38,625 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:38,625 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:38,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1703544920, now seen corresponding path program 9 times [2018-09-28 10:00:38,625 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:38,625 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:38,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:38,626 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:38,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:38,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:38,771 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:38,772 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:38,772 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:00:38,787 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:00:38,803 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-28 10:00:38,803 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:38,806 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:38,814 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:38,835 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:38,836 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-28 10:00:38,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-28 10:00:38,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-28 10:00:38,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-28 10:00:38,837 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 12 states. [2018-09-28 10:00:38,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:38,889 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-09-28 10:00:38,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-28 10:00:38,890 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2018-09-28 10:00:38,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:38,891 INFO L225 Difference]: With dead ends: 16 [2018-09-28 10:00:38,892 INFO L226 Difference]: Without dead ends: 14 [2018-09-28 10:00:38,892 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-28 10:00:38,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-28 10:00:38,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-28 10:00:38,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-28 10:00:38,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-28 10:00:38,896 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-09-28 10:00:38,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:38,896 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-28 10:00:38,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-28 10:00:38,896 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-28 10:00:38,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:00:38,897 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:38,897 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1, 1] [2018-09-28 10:00:38,897 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:38,898 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:38,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1270286943, now seen corresponding path program 10 times [2018-09-28 10:00:38,898 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:38,898 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:38,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:38,899 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:38,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:38,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:39,182 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:39,182 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:39,183 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:00:39,191 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:00:39,217 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:00:39,217 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:39,219 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:39,237 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:39,272 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:39,272 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-28 10:00:39,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-28 10:00:39,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-28 10:00:39,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-28 10:00:39,274 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 13 states. [2018-09-28 10:00:39,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:39,392 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-28 10:00:39,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-28 10:00:39,392 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 13 [2018-09-28 10:00:39,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:39,393 INFO L225 Difference]: With dead ends: 17 [2018-09-28 10:00:39,393 INFO L226 Difference]: Without dead ends: 15 [2018-09-28 10:00:39,394 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 [2018-09-28 10:00:39,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-28 10:00:39,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-28 10:00:39,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-28 10:00:39,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-28 10:00:39,398 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-09-28 10:00:39,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:39,398 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-28 10:00:39,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-28 10:00:39,398 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-28 10:00:39,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-28 10:00:39,399 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:39,399 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1, 1] [2018-09-28 10:00:39,399 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:39,400 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:39,400 INFO L82 PathProgramCache]: Analyzing trace with hash -724191544, now seen corresponding path program 11 times [2018-09-28 10:00:39,400 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:39,400 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:39,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:39,401 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:39,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:39,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:39,691 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:39,691 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:39,692 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:00:39,700 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:00:39,724 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-28 10:00:39,724 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:39,726 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:39,735 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:39,758 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:39,758 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-28 10:00:39,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-28 10:00:39,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-28 10:00:39,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-28 10:00:39,759 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 14 states. [2018-09-28 10:00:39,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:39,843 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-09-28 10:00:39,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-28 10:00:39,843 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-09-28 10:00:39,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:39,844 INFO L225 Difference]: With dead ends: 18 [2018-09-28 10:00:39,844 INFO L226 Difference]: Without dead ends: 16 [2018-09-28 10:00:39,844 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-28 10:00:39,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-28 10:00:39,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-28 10:00:39,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-28 10:00:39,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-09-28 10:00:39,847 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-09-28 10:00:39,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:39,848 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-09-28 10:00:39,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-28 10:00:39,848 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-09-28 10:00:39,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:00:39,848 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:39,849 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1, 1] [2018-09-28 10:00:39,849 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:39,849 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:39,849 INFO L82 PathProgramCache]: Analyzing trace with hash -975103359, now seen corresponding path program 12 times [2018-09-28 10:00:39,849 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:39,850 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:39,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:39,851 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:39,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:39,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:40,282 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:40,283 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:40,283 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:00:40,293 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:00:40,309 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-28 10:00:40,309 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:40,311 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:40,320 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:40,349 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:40,349 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-28 10:00:40,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-28 10:00:40,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-28 10:00:40,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-28 10:00:40,351 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 15 states. [2018-09-28 10:00:40,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:40,396 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-28 10:00:40,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-28 10:00:40,400 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-09-28 10:00:40,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:40,401 INFO L225 Difference]: With dead ends: 19 [2018-09-28 10:00:40,401 INFO L226 Difference]: Without dead ends: 17 [2018-09-28 10:00:40,402 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-28 10:00:40,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-28 10:00:40,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-28 10:00:40,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-28 10:00:40,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-28 10:00:40,405 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-09-28 10:00:40,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:40,406 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-28 10:00:40,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-28 10:00:40,406 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-28 10:00:40,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-28 10:00:40,406 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:40,407 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1, 1] [2018-09-28 10:00:40,407 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:40,407 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:40,407 INFO L82 PathProgramCache]: Analyzing trace with hash -163435032, now seen corresponding path program 13 times [2018-09-28 10:00:40,407 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:40,408 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:40,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:40,408 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:40,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:40,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:40,719 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:40,720 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:40,720 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:00:40,729 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:00:40,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:40,745 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:40,755 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:40,776 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:40,776 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-28 10:00:40,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-28 10:00:40,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-28 10:00:40,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-28 10:00:40,778 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 16 states. [2018-09-28 10:00:41,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:41,080 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-09-28 10:00:41,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-28 10:00:41,081 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2018-09-28 10:00:41,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:41,081 INFO L225 Difference]: With dead ends: 20 [2018-09-28 10:00:41,082 INFO L226 Difference]: Without dead ends: 18 [2018-09-28 10:00:41,082 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 [2018-09-28 10:00:41,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-28 10:00:41,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-28 10:00:41,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-28 10:00:41,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-09-28 10:00:41,085 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-09-28 10:00:41,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:41,086 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-09-28 10:00:41,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-28 10:00:41,086 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-09-28 10:00:41,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:00:41,087 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:41,087 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1, 1] [2018-09-28 10:00:41,087 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:41,088 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:41,088 INFO L82 PathProgramCache]: Analyzing trace with hash -771520671, now seen corresponding path program 14 times [2018-09-28 10:00:41,088 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:41,088 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:41,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:41,089 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:00:41,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:41,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:41,394 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:41,394 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:41,395 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:00:41,409 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:00:41,438 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:00:41,439 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:41,441 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:41,453 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:41,476 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:41,476 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-28 10:00:41,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-28 10:00:41,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-28 10:00:41,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-28 10:00:41,478 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 17 states. [2018-09-28 10:00:41,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:41,535 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-28 10:00:41,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-28 10:00:41,536 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2018-09-28 10:00:41,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:41,537 INFO L225 Difference]: With dead ends: 21 [2018-09-28 10:00:41,537 INFO L226 Difference]: Without dead ends: 19 [2018-09-28 10:00:41,538 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 [2018-09-28 10:00:41,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-28 10:00:41,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-28 10:00:41,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-28 10:00:41,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-28 10:00:41,542 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-09-28 10:00:41,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:41,542 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-28 10:00:41,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-28 10:00:41,543 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-28 10:00:41,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-28 10:00:41,543 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:41,543 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1, 1] [2018-09-28 10:00:41,544 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:41,544 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:41,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1852661000, now seen corresponding path program 15 times [2018-09-28 10:00:41,544 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:41,544 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:41,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:41,545 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:41,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:41,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:41,794 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:41,795 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:41,795 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:00:41,804 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:00:41,828 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-28 10:00:41,829 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:41,830 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:41,842 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:41,868 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:41,868 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-28 10:00:41,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-28 10:00:41,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-28 10:00:41,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-28 10:00:41,869 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 18 states. [2018-09-28 10:00:41,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:41,900 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-09-28 10:00:41,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-28 10:00:41,901 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-09-28 10:00:41,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:41,902 INFO L225 Difference]: With dead ends: 22 [2018-09-28 10:00:41,902 INFO L226 Difference]: Without dead ends: 20 [2018-09-28 10:00:41,903 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-28 10:00:41,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-28 10:00:41,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-28 10:00:41,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-28 10:00:41,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-09-28 10:00:41,907 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-09-28 10:00:41,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:41,907 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-09-28 10:00:41,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-28 10:00:41,907 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-09-28 10:00:41,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:00:41,908 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:41,908 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1, 1] [2018-09-28 10:00:41,908 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:41,908 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:41,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1597914177, now seen corresponding path program 16 times [2018-09-28 10:00:41,908 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:41,909 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:41,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:41,909 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:41,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:41,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:42,535 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:42,536 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:42,536 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:00:42,543 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:00:42,558 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:00:42,559 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:42,560 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:42,569 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:42,595 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:42,595 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-28 10:00:42,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-28 10:00:42,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-28 10:00:42,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-28 10:00:42,597 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 19 states. [2018-09-28 10:00:42,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:42,765 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-28 10:00:42,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-28 10:00:42,766 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2018-09-28 10:00:42,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:42,766 INFO L225 Difference]: With dead ends: 23 [2018-09-28 10:00:42,766 INFO L226 Difference]: Without dead ends: 21 [2018-09-28 10:00:42,767 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-28 10:00:42,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-28 10:00:42,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-28 10:00:42,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-28 10:00:42,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-28 10:00:42,771 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-09-28 10:00:42,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:42,771 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-28 10:00:42,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-28 10:00:42,771 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-28 10:00:42,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-28 10:00:42,772 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:42,772 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1, 1] [2018-09-28 10:00:42,772 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:42,773 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:42,773 INFO L82 PathProgramCache]: Analyzing trace with hash -2004270040, now seen corresponding path program 17 times [2018-09-28 10:00:42,773 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:42,773 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:42,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:42,774 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:42,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:42,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:43,129 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:43,130 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:43,130 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:00:43,138 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:00:43,209 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-28 10:00:43,209 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:43,210 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:43,219 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:43,247 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:43,248 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-28 10:00:43,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-28 10:00:43,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-28 10:00:43,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-28 10:00:43,249 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 20 states. [2018-09-28 10:00:43,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:43,329 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-09-28 10:00:43,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-28 10:00:43,331 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2018-09-28 10:00:43,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:43,331 INFO L225 Difference]: With dead ends: 24 [2018-09-28 10:00:43,331 INFO L226 Difference]: Without dead ends: 22 [2018-09-28 10:00:43,332 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-28 10:00:43,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-28 10:00:43,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-28 10:00:43,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-28 10:00:43,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-09-28 10:00:43,337 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-09-28 10:00:43,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:43,337 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-09-28 10:00:43,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-28 10:00:43,337 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-09-28 10:00:43,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-28 10:00:43,338 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:43,338 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1, 1] [2018-09-28 10:00:43,338 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:43,339 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:43,339 INFO L82 PathProgramCache]: Analyzing trace with hash -2002831071, now seen corresponding path program 18 times [2018-09-28 10:00:43,339 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:43,339 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:43,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:43,340 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:43,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:43,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:43,686 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:43,686 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:43,686 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:00:43,702 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:00:43,845 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-09-28 10:00:43,846 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:43,848 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:43,867 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:43,905 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:43,905 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-28 10:00:43,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-28 10:00:43,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-28 10:00:43,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-28 10:00:43,908 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 21 states. [2018-09-28 10:00:44,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:44,008 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-28 10:00:44,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-28 10:00:44,009 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 21 [2018-09-28 10:00:44,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:44,010 INFO L225 Difference]: With dead ends: 25 [2018-09-28 10:00:44,010 INFO L226 Difference]: Without dead ends: 23 [2018-09-28 10:00:44,011 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-28 10:00:44,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-28 10:00:44,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-28 10:00:44,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-28 10:00:44,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-28 10:00:44,014 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-09-28 10:00:44,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:44,014 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-28 10:00:44,015 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-28 10:00:44,015 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-28 10:00:44,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-28 10:00:44,015 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:44,015 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1, 1] [2018-09-28 10:00:44,016 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:44,016 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:44,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1958223032, now seen corresponding path program 19 times [2018-09-28 10:00:44,016 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:44,016 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:44,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:44,017 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:44,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:44,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:44,303 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:44,303 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:44,303 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:00:44,311 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:00:44,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:44,342 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:44,352 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:44,385 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:44,385 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-28 10:00:44,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-28 10:00:44,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-28 10:00:44,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-28 10:00:44,386 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 22 states. [2018-09-28 10:00:44,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:44,506 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-09-28 10:00:44,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-28 10:00:44,507 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2018-09-28 10:00:44,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:44,508 INFO L225 Difference]: With dead ends: 26 [2018-09-28 10:00:44,508 INFO L226 Difference]: Without dead ends: 24 [2018-09-28 10:00:44,509 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 [2018-09-28 10:00:44,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-28 10:00:44,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-28 10:00:44,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-28 10:00:44,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-09-28 10:00:44,513 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-09-28 10:00:44,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:44,514 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-09-28 10:00:44,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-28 10:00:44,514 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-09-28 10:00:44,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-28 10:00:44,515 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:44,515 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1, 1] [2018-09-28 10:00:44,515 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:44,515 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:44,515 INFO L82 PathProgramCache]: Analyzing trace with hash -575373823, now seen corresponding path program 20 times [2018-09-28 10:00:44,515 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:44,516 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:44,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:44,517 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:00:44,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:44,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:44,813 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:44,813 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:44,814 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:00:44,822 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:00:44,836 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:00:44,836 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:44,838 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:44,849 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:44,879 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:44,879 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-28 10:00:44,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-28 10:00:44,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-28 10:00:44,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-28 10:00:44,881 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 23 states. [2018-09-28 10:00:45,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:45,100 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-28 10:00:45,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-28 10:00:45,101 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 23 [2018-09-28 10:00:45,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:45,102 INFO L225 Difference]: With dead ends: 27 [2018-09-28 10:00:45,102 INFO L226 Difference]: Without dead ends: 25 [2018-09-28 10:00:45,102 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 [2018-09-28 10:00:45,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-28 10:00:45,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-28 10:00:45,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-28 10:00:45,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-28 10:00:45,105 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-09-28 10:00:45,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:45,105 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-28 10:00:45,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-28 10:00:45,105 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-28 10:00:45,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-28 10:00:45,106 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:45,106 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1, 1] [2018-09-28 10:00:45,107 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:45,107 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:45,107 INFO L82 PathProgramCache]: Analyzing trace with hash -656721304, now seen corresponding path program 21 times [2018-09-28 10:00:45,107 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:45,107 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:45,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:45,108 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:45,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:45,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:45,527 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:45,528 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:45,528 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:00:45,536 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:00:45,554 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-28 10:00:45,555 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:45,556 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:45,566 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:45,587 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:45,587 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-28 10:00:45,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-28 10:00:45,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-28 10:00:45,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-28 10:00:45,588 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 24 states. [2018-09-28 10:00:45,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:45,656 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-09-28 10:00:45,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-28 10:00:45,659 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 24 [2018-09-28 10:00:45,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:45,660 INFO L225 Difference]: With dead ends: 28 [2018-09-28 10:00:45,660 INFO L226 Difference]: Without dead ends: 26 [2018-09-28 10:00:45,661 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 [2018-09-28 10:00:45,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-28 10:00:45,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-28 10:00:45,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:00:45,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-09-28 10:00:45,664 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-09-28 10:00:45,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:45,664 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-09-28 10:00:45,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-28 10:00:45,665 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-09-28 10:00:45,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-28 10:00:45,665 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:45,666 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1, 1] [2018-09-28 10:00:45,666 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:45,666 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:45,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1116474081, now seen corresponding path program 22 times [2018-09-28 10:00:45,666 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:45,666 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:45,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:45,667 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:45,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:45,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:45,985 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:45,986 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:45,986 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:00:45,994 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:00:46,009 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:00:46,009 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:46,011 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:46,021 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:46,049 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:46,049 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-28 10:00:46,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-28 10:00:46,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-28 10:00:46,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-28 10:00:46,050 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 25 states. [2018-09-28 10:00:46,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:46,107 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-28 10:00:46,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-28 10:00:46,108 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 25 [2018-09-28 10:00:46,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:46,108 INFO L225 Difference]: With dead ends: 29 [2018-09-28 10:00:46,109 INFO L226 Difference]: Without dead ends: 27 [2018-09-28 10:00:46,109 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-28 10:00:46,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-28 10:00:46,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-28 10:00:46,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-28 10:00:46,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-28 10:00:46,114 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-09-28 10:00:46,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:46,114 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-28 10:00:46,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-28 10:00:46,114 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-28 10:00:46,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-28 10:00:46,115 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:46,115 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1, 1] [2018-09-28 10:00:46,115 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:46,115 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:46,116 INFO L82 PathProgramCache]: Analyzing trace with hash 250956168, now seen corresponding path program 23 times [2018-09-28 10:00:46,116 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:46,116 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:46,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:46,117 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:46,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:46,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:46,560 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:46,560 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:46,560 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:00:46,573 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:00:46,606 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-28 10:00:46,607 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:46,609 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:46,620 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:46,641 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:46,641 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-28 10:00:46,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-28 10:00:46,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-28 10:00:46,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-28 10:00:46,642 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 26 states. [2018-09-28 10:00:46,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:46,739 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-09-28 10:00:46,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-28 10:00:46,740 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 26 [2018-09-28 10:00:46,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:46,741 INFO L225 Difference]: With dead ends: 30 [2018-09-28 10:00:46,741 INFO L226 Difference]: Without dead ends: 28 [2018-09-28 10:00:46,742 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 [2018-09-28 10:00:46,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-28 10:00:46,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-28 10:00:46,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:00:46,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-09-28 10:00:46,747 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-09-28 10:00:46,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:46,747 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-09-28 10:00:46,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-28 10:00:46,747 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-09-28 10:00:46,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-28 10:00:46,748 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:46,748 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1, 1] [2018-09-28 10:00:46,748 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:46,749 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:46,749 INFO L82 PathProgramCache]: Analyzing trace with hash -810295359, now seen corresponding path program 24 times [2018-09-28 10:00:46,749 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:46,749 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:46,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:46,750 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:46,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:46,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:47,494 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:47,495 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:47,495 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:00:47,502 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:00:47,555 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-28 10:00:47,556 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:47,558 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:47,568 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:47,593 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:47,593 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-28 10:00:47,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-28 10:00:47,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-28 10:00:47,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-28 10:00:47,594 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 27 states. [2018-09-28 10:00:47,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:47,701 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-28 10:00:47,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-28 10:00:47,702 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 27 [2018-09-28 10:00:47,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:47,702 INFO L225 Difference]: With dead ends: 31 [2018-09-28 10:00:47,703 INFO L226 Difference]: Without dead ends: 29 [2018-09-28 10:00:47,703 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-28 10:00:47,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-28 10:00:47,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-28 10:00:47,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-28 10:00:47,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-28 10:00:47,706 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-09-28 10:00:47,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:47,706 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-28 10:00:47,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-28 10:00:47,707 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-28 10:00:47,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-28 10:00:47,707 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:47,707 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1, 1] [2018-09-28 10:00:47,708 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:47,708 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:47,708 INFO L82 PathProgramCache]: Analyzing trace with hash 650645672, now seen corresponding path program 25 times [2018-09-28 10:00:47,708 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:47,708 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:47,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:47,709 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:47,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:47,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:48,313 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:48,313 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:48,313 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:00:48,323 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:00:48,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:48,338 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:48,349 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:48,369 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:48,369 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-28 10:00:48,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-28 10:00:48,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-28 10:00:48,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-28 10:00:48,371 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 28 states. [2018-09-28 10:00:48,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:48,448 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-09-28 10:00:48,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-28 10:00:48,449 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 28 [2018-09-28 10:00:48,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:48,450 INFO L225 Difference]: With dead ends: 32 [2018-09-28 10:00:48,450 INFO L226 Difference]: Without dead ends: 30 [2018-09-28 10:00:48,451 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-28 10:00:48,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-28 10:00:48,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-28 10:00:48,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:00:48,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-09-28 10:00:48,454 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-09-28 10:00:48,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:48,455 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-09-28 10:00:48,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-28 10:00:48,455 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-09-28 10:00:48,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-28 10:00:48,455 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:48,455 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1, 1] [2018-09-28 10:00:48,458 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:48,458 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:48,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1304822623, now seen corresponding path program 26 times [2018-09-28 10:00:48,458 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:48,458 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:48,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:48,459 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:00:48,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:48,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:49,367 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:49,368 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:49,368 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:00:49,376 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:00:49,394 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:00:49,395 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:49,397 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:49,407 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:49,436 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:49,436 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-28 10:00:49,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-28 10:00:49,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-28 10:00:49,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-28 10:00:49,438 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 29 states. [2018-09-28 10:00:49,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:49,618 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-28 10:00:49,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-28 10:00:49,618 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 29 [2018-09-28 10:00:49,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:49,619 INFO L225 Difference]: With dead ends: 33 [2018-09-28 10:00:49,619 INFO L226 Difference]: Without dead ends: 31 [2018-09-28 10:00:49,620 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-28 10:00:49,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-28 10:00:49,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-28 10:00:49,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-28 10:00:49,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-28 10:00:49,625 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-09-28 10:00:49,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:49,625 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-28 10:00:49,626 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-28 10:00:49,626 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-28 10:00:49,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-28 10:00:49,626 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:49,626 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1, 1] [2018-09-28 10:00:49,626 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:49,627 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:49,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1794797624, now seen corresponding path program 27 times [2018-09-28 10:00:49,627 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:49,627 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:49,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:49,628 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:49,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:49,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:50,946 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:50,947 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:50,947 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:00:50,955 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:00:50,976 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-28 10:00:50,976 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:50,978 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:50,990 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:51,011 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:51,011 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-28 10:00:51,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-28 10:00:51,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-28 10:00:51,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-28 10:00:51,012 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 30 states. [2018-09-28 10:00:51,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:51,057 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-09-28 10:00:51,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-28 10:00:51,058 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 30 [2018-09-28 10:00:51,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:51,059 INFO L225 Difference]: With dead ends: 34 [2018-09-28 10:00:51,059 INFO L226 Difference]: Without dead ends: 32 [2018-09-28 10:00:51,060 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-28 10:00:51,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-28 10:00:51,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-28 10:00:51,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:00:51,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-09-28 10:00:51,063 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-09-28 10:00:51,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:51,063 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-09-28 10:00:51,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-28 10:00:51,063 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-09-28 10:00:51,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-28 10:00:51,064 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:51,064 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1, 1] [2018-09-28 10:00:51,064 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:51,065 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:51,065 INFO L82 PathProgramCache]: Analyzing trace with hash 195846529, now seen corresponding path program 28 times [2018-09-28 10:00:51,065 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:51,065 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:51,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:51,066 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:51,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:51,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:51,461 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:51,462 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:51,462 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:00:51,477 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:00:51,497 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:00:51,498 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:51,500 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:51,509 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:51,535 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:51,535 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-28 10:00:51,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-28 10:00:51,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-28 10:00:51,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-28 10:00:51,537 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 31 states. [2018-09-28 10:00:51,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:51,594 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-28 10:00:51,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-28 10:00:51,595 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 31 [2018-09-28 10:00:51,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:51,595 INFO L225 Difference]: With dead ends: 35 [2018-09-28 10:00:51,595 INFO L226 Difference]: Without dead ends: 33 [2018-09-28 10:00:51,596 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 [2018-09-28 10:00:51,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-28 10:00:51,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-28 10:00:51,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-28 10:00:51,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-28 10:00:51,600 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-09-28 10:00:51,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:51,600 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-28 10:00:51,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-28 10:00:51,601 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-28 10:00:51,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-28 10:00:51,601 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:51,601 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1, 1] [2018-09-28 10:00:51,602 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:51,602 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:51,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1776273128, now seen corresponding path program 29 times [2018-09-28 10:00:51,602 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:51,602 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:51,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:51,603 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:51,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:51,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:52,658 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:52,659 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:52,659 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:00:52,667 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:00:52,695 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-28 10:00:52,695 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:52,699 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:52,712 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:52,742 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:52,742 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-28 10:00:52,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-28 10:00:52,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-28 10:00:52,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-28 10:00:52,744 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 32 states. [2018-09-28 10:00:52,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:52,990 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-09-28 10:00:52,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-28 10:00:52,990 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 32 [2018-09-28 10:00:52,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:52,991 INFO L225 Difference]: With dead ends: 36 [2018-09-28 10:00:52,991 INFO L226 Difference]: Without dead ends: 34 [2018-09-28 10:00:52,991 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-28 10:00:52,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-28 10:00:52,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-28 10:00:52,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:00:52,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-09-28 10:00:52,994 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-09-28 10:00:52,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:52,994 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-09-28 10:00:52,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-28 10:00:52,994 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-09-28 10:00:52,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-28 10:00:52,994 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:52,994 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1, 1] [2018-09-28 10:00:52,995 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:52,995 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:52,995 INFO L82 PathProgramCache]: Analyzing trace with hash -770109855, now seen corresponding path program 30 times [2018-09-28 10:00:52,995 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:52,995 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:52,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:52,996 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:52,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:53,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:53,925 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:53,925 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:53,926 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:00:53,935 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:00:53,966 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-28 10:00:53,967 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:53,969 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:53,980 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:54,012 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:54,012 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-28 10:00:54,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-28 10:00:54,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-28 10:00:54,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-28 10:00:54,013 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 33 states. [2018-09-28 10:00:54,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:54,162 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-28 10:00:54,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-28 10:00:54,163 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 33 [2018-09-28 10:00:54,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:54,163 INFO L225 Difference]: With dead ends: 37 [2018-09-28 10:00:54,163 INFO L226 Difference]: Without dead ends: 35 [2018-09-28 10:00:54,165 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 [2018-09-28 10:00:54,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-28 10:00:54,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-28 10:00:54,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-28 10:00:54,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-28 10:00:54,168 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-09-28 10:00:54,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:54,169 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-28 10:00:54,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-28 10:00:54,169 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-28 10:00:54,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-28 10:00:54,169 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:54,169 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1, 1] [2018-09-28 10:00:54,170 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:54,170 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:54,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1896396296, now seen corresponding path program 31 times [2018-09-28 10:00:54,170 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:54,170 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:54,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:54,171 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:54,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:54,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:54,929 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:54,930 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:54,930 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:00:54,938 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:00:54,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:54,959 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:54,969 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:54,992 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:54,992 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-28 10:00:54,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-28 10:00:54,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-28 10:00:54,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-28 10:00:54,994 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 34 states. [2018-09-28 10:00:55,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:55,055 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-09-28 10:00:55,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-28 10:00:55,056 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 34 [2018-09-28 10:00:55,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:55,057 INFO L225 Difference]: With dead ends: 38 [2018-09-28 10:00:55,057 INFO L226 Difference]: Without dead ends: 36 [2018-09-28 10:00:55,058 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-28 10:00:55,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-28 10:00:55,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-28 10:00:55,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-28 10:00:55,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-09-28 10:00:55,061 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-09-28 10:00:55,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:55,062 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-09-28 10:00:55,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-28 10:00:55,062 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-09-28 10:00:55,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-28 10:00:55,062 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:55,063 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1, 1] [2018-09-28 10:00:55,063 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:55,063 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:55,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1341258943, now seen corresponding path program 32 times [2018-09-28 10:00:55,063 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:55,063 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:55,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:55,064 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:00:55,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:55,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:55,677 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:55,678 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:55,678 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:00:55,685 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:00:55,704 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:00:55,705 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:55,706 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:55,717 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:55,740 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:55,740 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-28 10:00:55,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-28 10:00:55,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-28 10:00:55,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-28 10:00:55,742 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 35 states. [2018-09-28 10:00:55,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:55,801 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-28 10:00:55,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-28 10:00:55,802 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 35 [2018-09-28 10:00:55,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:55,803 INFO L225 Difference]: With dead ends: 39 [2018-09-28 10:00:55,803 INFO L226 Difference]: Without dead ends: 37 [2018-09-28 10:00:55,804 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-28 10:00:55,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-28 10:00:55,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-28 10:00:55,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-28 10:00:55,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-28 10:00:55,807 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-09-28 10:00:55,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:55,807 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-28 10:00:55,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-28 10:00:55,808 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-28 10:00:55,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-28 10:00:55,808 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:55,808 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1, 1] [2018-09-28 10:00:55,808 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:55,809 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:55,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1370643752, now seen corresponding path program 33 times [2018-09-28 10:00:55,809 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:55,809 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:55,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:55,810 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:55,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:55,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:56,312 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:56,312 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:56,312 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:00:56,320 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:00:56,346 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-28 10:00:56,346 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:56,348 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:56,357 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:56,385 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:56,386 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-28 10:00:56,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-28 10:00:56,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-28 10:00:56,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-28 10:00:56,387 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 36 states. [2018-09-28 10:00:56,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:56,514 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-09-28 10:00:56,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-28 10:00:56,514 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 36 [2018-09-28 10:00:56,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:56,515 INFO L225 Difference]: With dead ends: 40 [2018-09-28 10:00:56,515 INFO L226 Difference]: Without dead ends: 38 [2018-09-28 10:00:56,516 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-28 10:00:56,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-28 10:00:56,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-28 10:00:56,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-28 10:00:56,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-09-28 10:00:56,519 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-09-28 10:00:56,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:56,519 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-09-28 10:00:56,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-28 10:00:56,519 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-09-28 10:00:56,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-28 10:00:56,519 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:56,520 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1, 1] [2018-09-28 10:00:56,520 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:56,520 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:56,520 INFO L82 PathProgramCache]: Analyzing trace with hash -459718623, now seen corresponding path program 34 times [2018-09-28 10:00:56,520 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:56,520 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:56,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:56,521 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:56,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:56,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:57,086 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:57,086 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:57,086 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:00:57,093 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:00:57,116 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:00:57,116 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:57,118 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:57,128 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:57,155 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:57,155 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-28 10:00:57,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-28 10:00:57,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-28 10:00:57,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-28 10:00:57,156 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 37 states. [2018-09-28 10:00:57,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:57,224 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-28 10:00:57,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-28 10:00:57,225 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 37 [2018-09-28 10:00:57,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:57,226 INFO L225 Difference]: With dead ends: 41 [2018-09-28 10:00:57,226 INFO L226 Difference]: Without dead ends: 39 [2018-09-28 10:00:57,227 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 [2018-09-28 10:00:57,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-28 10:00:57,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-28 10:00:57,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-28 10:00:57,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-28 10:00:57,229 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-09-28 10:00:57,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:57,230 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-28 10:00:57,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-28 10:00:57,230 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-28 10:00:57,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-28 10:00:57,230 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:57,230 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1, 1] [2018-09-28 10:00:57,231 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:57,231 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:57,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1366377400, now seen corresponding path program 35 times [2018-09-28 10:00:57,231 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:57,231 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:57,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:57,232 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:57,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:57,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:58,262 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:58,263 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:58,263 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:00:58,279 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:00:58,355 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-28 10:00:58,356 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:58,358 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:58,370 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:58,391 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:58,391 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-28 10:00:58,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-28 10:00:58,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-28 10:00:58,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-28 10:00:58,393 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 38 states. [2018-09-28 10:00:58,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:58,473 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-09-28 10:00:58,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-28 10:00:58,473 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 38 [2018-09-28 10:00:58,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:58,474 INFO L225 Difference]: With dead ends: 42 [2018-09-28 10:00:58,474 INFO L226 Difference]: Without dead ends: 40 [2018-09-28 10:00:58,475 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-28 10:00:58,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-28 10:00:58,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-28 10:00:58,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-28 10:00:58,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-09-28 10:00:58,479 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-09-28 10:00:58,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:58,479 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-09-28 10:00:58,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-28 10:00:58,479 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-09-28 10:00:58,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-28 10:00:58,480 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:58,480 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1, 1] [2018-09-28 10:00:58,480 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:58,480 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:58,480 INFO L82 PathProgramCache]: Analyzing trace with hash 591971585, now seen corresponding path program 36 times [2018-09-28 10:00:58,480 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:58,480 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:58,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:58,481 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:58,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:58,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:00:59,162 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:59,163 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:00:59,163 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:00:59,171 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:00:59,200 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-28 10:00:59,200 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:00:59,202 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:00:59,213 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:00:59,247 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:00:59,247 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-28 10:00:59,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-28 10:00:59,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-28 10:00:59,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-28 10:00:59,248 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 39 states. [2018-09-28 10:00:59,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:00:59,665 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-28 10:00:59,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-28 10:00:59,666 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 39 [2018-09-28 10:00:59,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:00:59,666 INFO L225 Difference]: With dead ends: 43 [2018-09-28 10:00:59,667 INFO L226 Difference]: Without dead ends: 41 [2018-09-28 10:00:59,668 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-28 10:00:59,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-28 10:00:59,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-28 10:00:59,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-28 10:00:59,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-28 10:00:59,670 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-09-28 10:00:59,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:00:59,670 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-28 10:00:59,670 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-28 10:00:59,670 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-28 10:00:59,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-28 10:00:59,671 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:00:59,671 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1, 1] [2018-09-28 10:00:59,671 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:00:59,671 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:00:59,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1171247976, now seen corresponding path program 37 times [2018-09-28 10:00:59,671 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:00:59,672 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:00:59,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:59,672 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:00:59,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:00:59,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:00,294 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:00,294 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:01:00,294 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:01:00,302 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:01:00,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:00,319 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:00,330 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:00,359 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:01:00,359 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-28 10:01:00,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-28 10:01:00,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-28 10:01:00,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-28 10:01:00,360 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 40 states. [2018-09-28 10:01:00,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:00,428 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-09-28 10:01:00,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-28 10:01:00,428 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 40 [2018-09-28 10:01:00,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:00,429 INFO L225 Difference]: With dead ends: 44 [2018-09-28 10:01:00,429 INFO L226 Difference]: Without dead ends: 42 [2018-09-28 10:01:00,430 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-28 10:01:00,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-28 10:01:00,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-28 10:01:00,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-28 10:01:00,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-09-28 10:01:00,432 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-09-28 10:01:00,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:00,432 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-09-28 10:01:00,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-28 10:01:00,433 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-09-28 10:01:00,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-28 10:01:00,433 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:00,433 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1, 1] [2018-09-28 10:01:00,434 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:00,434 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:00,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1948946913, now seen corresponding path program 38 times [2018-09-28 10:01:00,434 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:00,434 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:00,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:00,435 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:01:00,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:00,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:01,457 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:01,457 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:01:01,457 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:01:01,465 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:01:01,490 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:01:01,491 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:01:01,492 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:01,501 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:01,522 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:01:01,522 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-28 10:01:01,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-28 10:01:01,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-28 10:01:01,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-28 10:01:01,524 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 41 states. [2018-09-28 10:01:01,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:01,602 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-28 10:01:01,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-28 10:01:01,603 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 41 [2018-09-28 10:01:01,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:01,603 INFO L225 Difference]: With dead ends: 45 [2018-09-28 10:01:01,604 INFO L226 Difference]: Without dead ends: 43 [2018-09-28 10:01:01,605 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-28 10:01:01,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-28 10:01:01,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-28 10:01:01,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-28 10:01:01,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-28 10:01:01,608 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-09-28 10:01:01,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:01,608 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-28 10:01:01,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-28 10:01:01,608 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-28 10:01:01,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-28 10:01:01,609 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:01,609 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1, 1] [2018-09-28 10:01:01,609 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:01,609 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:01,609 INFO L82 PathProgramCache]: Analyzing trace with hash 287810184, now seen corresponding path program 39 times [2018-09-28 10:01:01,609 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:01,610 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:01,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:01,610 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:01:01,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:01,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:02,492 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:02,493 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:01:02,493 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:01:02,500 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:01:02,543 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-09-28 10:01:02,544 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:01:02,545 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:02,557 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:02,579 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:01:02,579 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-28 10:01:02,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-28 10:01:02,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-28 10:01:02,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-28 10:01:02,581 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 42 states. [2018-09-28 10:01:02,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:02,708 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-09-28 10:01:02,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-28 10:01:02,708 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 42 [2018-09-28 10:01:02,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:02,709 INFO L225 Difference]: With dead ends: 46 [2018-09-28 10:01:02,709 INFO L226 Difference]: Without dead ends: 44 [2018-09-28 10:01:02,710 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-28 10:01:02,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-28 10:01:02,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-28 10:01:02,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-28 10:01:02,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-09-28 10:01:02,712 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-09-28 10:01:02,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:02,712 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-09-28 10:01:02,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-28 10:01:02,712 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-09-28 10:01:02,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-28 10:01:02,713 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:02,713 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1, 1] [2018-09-28 10:01:02,713 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:02,713 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:02,713 INFO L82 PathProgramCache]: Analyzing trace with hash 332179137, now seen corresponding path program 40 times [2018-09-28 10:01:02,713 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:02,713 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:02,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:02,714 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:01:02,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:02,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:03,694 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:03,694 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:01:03,694 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:01:03,714 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:01:03,750 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:01:03,751 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:01:03,753 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:03,764 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:03,791 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:01:03,791 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-28 10:01:03,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-28 10:01:03,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-28 10:01:03,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-28 10:01:03,793 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 43 states. [2018-09-28 10:01:03,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:03,913 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-28 10:01:03,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-28 10:01:03,913 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 43 [2018-09-28 10:01:03,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:03,914 INFO L225 Difference]: With dead ends: 47 [2018-09-28 10:01:03,914 INFO L226 Difference]: Without dead ends: 45 [2018-09-28 10:01:03,915 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-28 10:01:03,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-28 10:01:03,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-28 10:01:03,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-28 10:01:03,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-28 10:01:03,917 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-09-28 10:01:03,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:03,918 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-28 10:01:03,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-28 10:01:03,918 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-28 10:01:03,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-28 10:01:03,918 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:03,918 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1, 1] [2018-09-28 10:01:03,918 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:03,918 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:03,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1707616680, now seen corresponding path program 41 times [2018-09-28 10:01:03,919 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:03,919 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:03,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:03,919 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:01:03,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:03,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:04,823 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:04,823 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:01:04,823 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:01:04,832 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:01:04,866 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-28 10:01:04,867 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:01:04,869 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:04,879 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:04,903 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:01:04,903 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-28 10:01:04,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-28 10:01:04,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-28 10:01:04,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-28 10:01:04,904 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 44 states. [2018-09-28 10:01:04,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:04,973 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-09-28 10:01:04,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-28 10:01:04,974 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 44 [2018-09-28 10:01:04,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:04,975 INFO L225 Difference]: With dead ends: 48 [2018-09-28 10:01:04,975 INFO L226 Difference]: Without dead ends: 46 [2018-09-28 10:01:04,976 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 [2018-09-28 10:01:04,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-28 10:01:04,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-28 10:01:04,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-28 10:01:04,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-09-28 10:01:04,978 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-09-28 10:01:04,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:04,978 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-09-28 10:01:04,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-28 10:01:04,978 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-09-28 10:01:04,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-28 10:01:04,978 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:04,979 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1, 1] [2018-09-28 10:01:04,979 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:04,979 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:04,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1396507553, now seen corresponding path program 42 times [2018-09-28 10:01:04,979 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:04,979 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:04,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:04,980 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:01:04,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:04,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:05,719 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:05,719 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:01:05,719 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:01:05,726 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:01:05,763 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-09-28 10:01:05,763 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:01:05,765 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:05,776 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:05,802 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:01:05,803 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-28 10:01:05,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-28 10:01:05,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-28 10:01:05,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-28 10:01:05,804 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 45 states. [2018-09-28 10:01:05,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:05,883 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-28 10:01:05,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-28 10:01:05,884 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 45 [2018-09-28 10:01:05,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:05,884 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:01:05,885 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:01:05,886 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-28 10:01:05,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:01:05,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-28 10:01:05,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-28 10:01:05,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-28 10:01:05,889 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-09-28 10:01:05,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:05,889 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-28 10:01:05,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-28 10:01:05,889 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-28 10:01:05,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-28 10:01:05,890 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:05,890 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1, 1] [2018-09-28 10:01:05,890 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:05,891 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:05,891 INFO L82 PathProgramCache]: Analyzing trace with hash 342059208, now seen corresponding path program 43 times [2018-09-28 10:01:05,891 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:05,891 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:05,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:05,892 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:01:05,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:05,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:06,783 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:06,783 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:01:06,784 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:01:06,791 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:01:06,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:06,822 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:06,834 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:06,855 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:01:06,855 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-28 10:01:06,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-28 10:01:06,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-28 10:01:06,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-28 10:01:06,857 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 46 states. [2018-09-28 10:01:06,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:06,957 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-09-28 10:01:06,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-28 10:01:06,958 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 46 [2018-09-28 10:01:06,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:06,959 INFO L225 Difference]: With dead ends: 50 [2018-09-28 10:01:06,959 INFO L226 Difference]: Without dead ends: 48 [2018-09-28 10:01:06,960 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-28 10:01:06,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-28 10:01:06,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-09-28 10:01:06,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-28 10:01:06,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-09-28 10:01:06,963 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-09-28 10:01:06,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:06,963 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-09-28 10:01:06,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-28 10:01:06,964 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-09-28 10:01:06,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-28 10:01:06,964 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:06,964 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1, 1] [2018-09-28 10:01:06,964 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:06,965 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:06,965 INFO L82 PathProgramCache]: Analyzing trace with hash 2013898881, now seen corresponding path program 44 times [2018-09-28 10:01:06,965 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:06,965 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:06,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:06,966 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:01:06,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:06,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:08,433 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:08,434 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:01:08,434 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:01:08,454 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:01:08,494 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:01:08,494 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:01:08,496 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:08,508 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:08,528 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:01:08,528 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-28 10:01:08,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-28 10:01:08,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-28 10:01:08,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-28 10:01:08,529 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 47 states. [2018-09-28 10:01:08,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:08,625 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-28 10:01:08,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-28 10:01:08,626 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 47 [2018-09-28 10:01:08,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:08,627 INFO L225 Difference]: With dead ends: 51 [2018-09-28 10:01:08,627 INFO L226 Difference]: Without dead ends: 49 [2018-09-28 10:01:08,628 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-28 10:01:08,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-28 10:01:08,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-28 10:01:08,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-28 10:01:08,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-28 10:01:08,631 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-09-28 10:01:08,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:08,631 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-28 10:01:08,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-28 10:01:08,631 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-28 10:01:08,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-28 10:01:08,632 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:08,632 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1, 1] [2018-09-28 10:01:08,632 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:08,632 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:08,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1993646104, now seen corresponding path program 45 times [2018-09-28 10:01:08,633 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:08,633 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:08,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:08,634 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:01:08,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:08,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:09,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:09,689 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:01:09,689 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:01:09,697 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:01:09,730 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-28 10:01:09,730 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:01:09,732 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:09,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:09,770 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:01:09,770 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-28 10:01:09,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-28 10:01:09,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-28 10:01:09,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-28 10:01:09,771 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 48 states. [2018-09-28 10:01:10,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:10,188 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-09-28 10:01:10,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-28 10:01:10,189 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 48 [2018-09-28 10:01:10,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:10,190 INFO L225 Difference]: With dead ends: 52 [2018-09-28 10:01:10,190 INFO L226 Difference]: Without dead ends: 50 [2018-09-28 10:01:10,190 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-28 10:01:10,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-28 10:01:10,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-28 10:01:10,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-28 10:01:10,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-09-28 10:01:10,193 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-09-28 10:01:10,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:10,193 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-09-28 10:01:10,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-28 10:01:10,193 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-09-28 10:01:10,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-28 10:01:10,194 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:10,194 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1, 1] [2018-09-28 10:01:10,194 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:10,194 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:10,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1673489055, now seen corresponding path program 46 times [2018-09-28 10:01:10,194 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:10,194 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:10,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:10,195 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:01:10,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:10,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:12,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:12,040 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:01:12,040 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:01:12,047 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:01:12,076 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:01:12,077 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:01:12,078 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:12,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:12,112 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:01:12,112 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-28 10:01:12,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-28 10:01:12,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-28 10:01:12,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-28 10:01:12,113 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 49 states. [2018-09-28 10:01:12,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:12,185 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-28 10:01:12,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-28 10:01:12,186 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 49 [2018-09-28 10:01:12,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:12,187 INFO L225 Difference]: With dead ends: 53 [2018-09-28 10:01:12,187 INFO L226 Difference]: Without dead ends: 51 [2018-09-28 10:01:12,187 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-28 10:01:12,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-28 10:01:12,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-28 10:01:12,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-28 10:01:12,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-28 10:01:12,190 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-09-28 10:01:12,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:12,190 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-28 10:01:12,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-28 10:01:12,190 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-28 10:01:12,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-28 10:01:12,190 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:12,191 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1, 1] [2018-09-28 10:01:12,191 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:12,191 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:12,191 INFO L82 PathProgramCache]: Analyzing trace with hash -338555128, now seen corresponding path program 47 times [2018-09-28 10:01:12,191 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:12,191 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:12,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:12,192 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:01:12,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:12,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:13,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:13,805 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:01:13,805 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:01:13,812 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:01:13,850 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-28 10:01:13,850 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:01:13,852 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:13,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:13,884 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:01:13,884 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-28 10:01:13,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-28 10:01:13,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-28 10:01:13,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-28 10:01:13,885 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 50 states. [2018-09-28 10:01:13,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:13,981 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-09-28 10:01:13,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-28 10:01:13,982 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 50 [2018-09-28 10:01:13,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:13,983 INFO L225 Difference]: With dead ends: 54 [2018-09-28 10:01:13,983 INFO L226 Difference]: Without dead ends: 52 [2018-09-28 10:01:13,984 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-28 10:01:13,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-28 10:01:13,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-28 10:01:13,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-28 10:01:13,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-09-28 10:01:13,987 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-09-28 10:01:13,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:13,987 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-09-28 10:01:13,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-28 10:01:13,987 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-09-28 10:01:13,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-28 10:01:13,988 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:13,988 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1, 1] [2018-09-28 10:01:13,988 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:13,988 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:13,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1905276351, now seen corresponding path program 48 times [2018-09-28 10:01:13,988 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:13,988 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:13,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:13,989 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:01:13,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:13,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:15,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:15,052 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:01:15,052 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:01:15,059 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:01:15,106 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-28 10:01:15,107 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:01:15,108 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:15,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:15,147 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:01:15,148 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-28 10:01:15,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-28 10:01:15,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-28 10:01:15,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-28 10:01:15,149 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 51 states. [2018-09-28 10:01:15,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:15,283 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-28 10:01:15,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-28 10:01:15,283 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 51 [2018-09-28 10:01:15,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:15,284 INFO L225 Difference]: With dead ends: 55 [2018-09-28 10:01:15,284 INFO L226 Difference]: Without dead ends: 53 [2018-09-28 10:01:15,285 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-28 10:01:15,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-28 10:01:15,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-28 10:01:15,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-28 10:01:15,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-28 10:01:15,288 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-09-28 10:01:15,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:15,288 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-28 10:01:15,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-28 10:01:15,288 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-28 10:01:15,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-28 10:01:15,289 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:15,289 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1, 1] [2018-09-28 10:01:15,289 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:15,289 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:15,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1065973288, now seen corresponding path program 49 times [2018-09-28 10:01:15,290 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:15,290 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:15,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:15,290 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:01:15,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:15,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:16,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:16,290 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:01:16,290 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:01:16,298 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:01:16,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:16,327 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:16,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:16,370 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:01:16,370 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-28 10:01:16,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-28 10:01:16,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-28 10:01:16,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-28 10:01:16,371 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 52 states. [2018-09-28 10:01:16,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:16,478 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-09-28 10:01:16,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-28 10:01:16,478 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 52 [2018-09-28 10:01:16,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:16,479 INFO L225 Difference]: With dead ends: 56 [2018-09-28 10:01:16,479 INFO L226 Difference]: Without dead ends: 54 [2018-09-28 10:01:16,480 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-28 10:01:16,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-28 10:01:16,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-09-28 10:01:16,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-28 10:01:16,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-09-28 10:01:16,483 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-09-28 10:01:16,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:16,483 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-09-28 10:01:16,484 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-28 10:01:16,484 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-09-28 10:01:16,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-28 10:01:16,484 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:16,484 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1, 1] [2018-09-28 10:01:16,484 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:16,485 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:16,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1314568415, now seen corresponding path program 50 times [2018-09-28 10:01:16,485 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:16,485 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:16,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:16,486 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:01:16,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:16,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:17,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:17,536 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:01:17,536 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:01:17,547 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:01:17,577 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:01:17,577 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:01:17,579 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:17,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:17,610 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:01:17,610 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-28 10:01:17,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-28 10:01:17,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-28 10:01:17,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-28 10:01:17,611 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 53 states. [2018-09-28 10:01:17,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:17,712 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-28 10:01:17,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-28 10:01:17,712 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 53 [2018-09-28 10:01:17,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:17,714 INFO L225 Difference]: With dead ends: 57 [2018-09-28 10:01:17,714 INFO L226 Difference]: Without dead ends: 55 [2018-09-28 10:01:17,715 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-28 10:01:17,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-28 10:01:17,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-28 10:01:17,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-28 10:01:17,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-28 10:01:17,717 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-09-28 10:01:17,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:17,717 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-28 10:01:17,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-28 10:01:17,717 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-28 10:01:17,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-28 10:01:17,718 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:17,718 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1, 1] [2018-09-28 10:01:17,718 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:17,718 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:17,719 INFO L82 PathProgramCache]: Analyzing trace with hash -2096917176, now seen corresponding path program 51 times [2018-09-28 10:01:17,719 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:17,719 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:17,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:17,720 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:01:17,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:17,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:19,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:19,145 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:01:19,145 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:01:19,152 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:01:19,190 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-09-28 10:01:19,190 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:01:19,192 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:19,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:19,230 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:01:19,230 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-28 10:01:19,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-28 10:01:19,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-28 10:01:19,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-28 10:01:19,232 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 54 states. [2018-09-28 10:01:19,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:19,347 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-09-28 10:01:19,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-28 10:01:19,347 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 54 [2018-09-28 10:01:19,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:19,348 INFO L225 Difference]: With dead ends: 58 [2018-09-28 10:01:19,348 INFO L226 Difference]: Without dead ends: 56 [2018-09-28 10:01:19,349 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-28 10:01:19,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-28 10:01:19,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-28 10:01:19,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-28 10:01:19,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-09-28 10:01:19,351 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-09-28 10:01:19,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:19,351 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-09-28 10:01:19,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-28 10:01:19,351 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-09-28 10:01:19,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-28 10:01:19,352 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:19,352 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1, 1] [2018-09-28 10:01:19,352 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:19,352 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:19,353 INFO L82 PathProgramCache]: Analyzing trace with hash -579924991, now seen corresponding path program 52 times [2018-09-28 10:01:19,353 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:19,353 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:19,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:19,354 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:01:19,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:19,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:20,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:20,613 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:01:20,614 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:01:20,621 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:01:20,652 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:01:20,652 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:01:20,654 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:20,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:20,689 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:01:20,690 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-28 10:01:20,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-28 10:01:20,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-28 10:01:20,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-28 10:01:20,691 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 55 states. [2018-09-28 10:01:20,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:20,808 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-28 10:01:20,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-28 10:01:20,809 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 55 [2018-09-28 10:01:20,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:20,809 INFO L225 Difference]: With dead ends: 59 [2018-09-28 10:01:20,809 INFO L226 Difference]: Without dead ends: 57 [2018-09-28 10:01:20,810 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-28 10:01:20,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-28 10:01:20,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-28 10:01:20,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-28 10:01:20,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-09-28 10:01:20,812 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-09-28 10:01:20,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:20,813 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-09-28 10:01:20,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-28 10:01:20,813 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-09-28 10:01:20,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-28 10:01:20,813 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:20,814 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1, 1] [2018-09-28 10:01:20,814 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:20,814 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:20,814 INFO L82 PathProgramCache]: Analyzing trace with hash -797807512, now seen corresponding path program 53 times [2018-09-28 10:01:20,814 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:20,814 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:20,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:20,815 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:01:20,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:20,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:22,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:22,019 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:01:22,019 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 [2018-09-28 10:01:22,028 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:01:22,070 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-09-28 10:01:22,070 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:01:22,072 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:22,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:22,102 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:01:22,102 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-28 10:01:22,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-28 10:01:22,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-28 10:01:22,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-28 10:01:22,104 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 56 states. [2018-09-28 10:01:22,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:22,175 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-09-28 10:01:22,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-28 10:01:22,176 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 56 [2018-09-28 10:01:22,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:22,176 INFO L225 Difference]: With dead ends: 60 [2018-09-28 10:01:22,177 INFO L226 Difference]: Without dead ends: 58 [2018-09-28 10:01:22,177 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-28 10:01:22,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-28 10:01:22,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-28 10:01:22,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-28 10:01:22,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-09-28 10:01:22,179 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-09-28 10:01:22,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:22,179 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-09-28 10:01:22,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-28 10:01:22,180 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-09-28 10:01:22,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-28 10:01:22,180 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:22,180 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1, 1] [2018-09-28 10:01:22,180 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:22,180 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:22,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1037768929, now seen corresponding path program 54 times [2018-09-28 10:01:22,180 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:22,180 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:22,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:22,181 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:01:22,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:22,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:23,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:23,831 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:01:23,832 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:01:23,839 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:01:23,881 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-09-28 10:01:23,881 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:01:23,883 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:23,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:23,925 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:01:23,926 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-28 10:01:23,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-28 10:01:23,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-28 10:01:23,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-28 10:01:23,927 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 57 states. [2018-09-28 10:01:24,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:24,122 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-28 10:01:24,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-28 10:01:24,123 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 57 [2018-09-28 10:01:24,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:24,124 INFO L225 Difference]: With dead ends: 61 [2018-09-28 10:01:24,124 INFO L226 Difference]: Without dead ends: 59 [2018-09-28 10:01:24,124 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-28 10:01:24,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-28 10:01:24,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-28 10:01:24,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-28 10:01:24,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-28 10:01:24,126 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-09-28 10:01:24,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:24,127 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-28 10:01:24,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-28 10:01:24,127 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-28 10:01:24,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-28 10:01:24,127 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:24,127 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1, 1] [2018-09-28 10:01:24,128 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:24,128 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:24,128 INFO L82 PathProgramCache]: Analyzing trace with hash 2106063752, now seen corresponding path program 55 times [2018-09-28 10:01:24,128 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:24,128 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:24,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:24,128 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:01:24,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:24,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:25,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:25,358 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:01:25,358 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:01:25,365 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:01:25,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:25,400 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:25,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:25,431 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:01:25,431 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-28 10:01:25,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-28 10:01:25,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-28 10:01:25,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-28 10:01:25,432 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 58 states. [2018-09-28 10:01:25,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:25,535 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-09-28 10:01:25,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-28 10:01:25,536 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 58 [2018-09-28 10:01:25,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:25,536 INFO L225 Difference]: With dead ends: 62 [2018-09-28 10:01:25,536 INFO L226 Difference]: Without dead ends: 60 [2018-09-28 10:01:25,537 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-28 10:01:25,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-09-28 10:01:25,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-09-28 10:01:25,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-28 10:01:25,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-09-28 10:01:25,539 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-09-28 10:01:25,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:25,539 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-09-28 10:01:25,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-28 10:01:25,540 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-09-28 10:01:25,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-28 10:01:25,540 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:25,540 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1, 1] [2018-09-28 10:01:25,541 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:25,541 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:25,541 INFO L82 PathProgramCache]: Analyzing trace with hash 863464897, now seen corresponding path program 56 times [2018-09-28 10:01:25,541 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:25,541 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:25,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:25,542 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:01:25,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:25,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:26,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:26,878 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:01:26,879 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:01:26,887 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:01:26,923 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:01:26,923 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:01:26,925 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:26,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:26,968 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:01:26,969 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-28 10:01:26,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-28 10:01:26,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-28 10:01:26,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-28 10:01:26,970 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 59 states. [2018-09-28 10:01:27,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:27,406 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-28 10:01:27,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-28 10:01:27,406 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 59 [2018-09-28 10:01:27,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:27,407 INFO L225 Difference]: With dead ends: 63 [2018-09-28 10:01:27,407 INFO L226 Difference]: Without dead ends: 61 [2018-09-28 10:01:27,409 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-28 10:01:27,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-28 10:01:27,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-28 10:01:27,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-28 10:01:27,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-09-28 10:01:27,412 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-09-28 10:01:27,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:27,412 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-09-28 10:01:27,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-28 10:01:27,412 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-09-28 10:01:27,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-28 10:01:27,413 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:27,413 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1, 1] [2018-09-28 10:01:27,413 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:27,413 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:27,413 INFO L82 PathProgramCache]: Analyzing trace with hash 997606056, now seen corresponding path program 57 times [2018-09-28 10:01:27,413 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:27,414 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:27,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:27,414 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:01:27,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:27,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:28,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:28,912 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:01:28,912 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:01:28,920 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:01:28,964 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-09-28 10:01:28,965 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:01:28,967 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:28,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:29,008 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:01:29,009 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-28 10:01:29,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-28 10:01:29,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-28 10:01:29,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-28 10:01:29,010 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 60 states. [2018-09-28 10:01:29,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:29,124 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-09-28 10:01:29,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-28 10:01:29,124 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 60 [2018-09-28 10:01:29,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:29,125 INFO L225 Difference]: With dead ends: 64 [2018-09-28 10:01:29,125 INFO L226 Difference]: Without dead ends: 62 [2018-09-28 10:01:29,125 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-28 10:01:29,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-09-28 10:01:29,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-09-28 10:01:29,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-09-28 10:01:29,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-09-28 10:01:29,127 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-09-28 10:01:29,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:29,128 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-09-28 10:01:29,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-28 10:01:29,128 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-09-28 10:01:29,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-09-28 10:01:29,128 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:29,128 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1, 1] [2018-09-28 10:01:29,129 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:29,129 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:29,129 INFO L82 PathProgramCache]: Analyzing trace with hash 861014689, now seen corresponding path program 58 times [2018-09-28 10:01:29,129 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:29,129 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:29,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:29,130 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:01:29,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:29,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:30,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:30,941 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:01:30,941 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:01:30,955 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:01:30,990 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:01:30,990 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:01:30,992 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:31,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:31,024 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:01:31,024 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-28 10:01:31,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-28 10:01:31,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-28 10:01:31,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-28 10:01:31,025 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 61 states. [2018-09-28 10:01:31,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:31,137 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-28 10:01:31,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-28 10:01:31,138 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 61 [2018-09-28 10:01:31,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:31,139 INFO L225 Difference]: With dead ends: 65 [2018-09-28 10:01:31,139 INFO L226 Difference]: Without dead ends: 63 [2018-09-28 10:01:31,139 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-28 10:01:31,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-28 10:01:31,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-28 10:01:31,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-28 10:01:31,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-09-28 10:01:31,143 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-09-28 10:01:31,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:31,143 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-09-28 10:01:31,143 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-28 10:01:31,143 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-09-28 10:01:31,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-28 10:01:31,144 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:31,144 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1, 1] [2018-09-28 10:01:31,144 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:31,144 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:31,144 INFO L82 PathProgramCache]: Analyzing trace with hash 921649608, now seen corresponding path program 59 times [2018-09-28 10:01:31,144 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:31,144 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:31,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:31,145 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:01:31,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:31,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:32,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:32,578 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:01:32,578 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:01:32,586 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:01:32,633 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-09-28 10:01:32,634 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:01:32,636 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:32,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:32,681 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:01:32,681 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-28 10:01:32,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-28 10:01:32,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-28 10:01:32,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-28 10:01:32,682 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 62 states. [2018-09-28 10:01:32,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:32,832 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-09-28 10:01:32,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-28 10:01:32,833 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 62 [2018-09-28 10:01:32,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:32,834 INFO L225 Difference]: With dead ends: 66 [2018-09-28 10:01:32,834 INFO L226 Difference]: Without dead ends: 64 [2018-09-28 10:01:32,834 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 [2018-09-28 10:01:32,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-28 10:01:32,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-09-28 10:01:32,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-28 10:01:32,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-09-28 10:01:32,836 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-09-28 10:01:32,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:32,836 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-09-28 10:01:32,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-28 10:01:32,836 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-09-28 10:01:32,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-28 10:01:32,836 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:32,836 INFO L375 BasicCegarLoop]: trace histogram [60, 1, 1, 1] [2018-09-28 10:01:32,837 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:32,837 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:32,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1493635199, now seen corresponding path program 60 times [2018-09-28 10:01:32,837 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:32,837 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:32,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:32,838 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:01:32,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:32,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:34,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:34,942 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:01:34,942 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:01:34,951 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:01:34,999 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-28 10:01:35,000 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:01:35,002 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:35,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:35,036 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:01:35,037 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-09-28 10:01:35,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-28 10:01:35,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-28 10:01:35,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-28 10:01:35,038 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 63 states. [2018-09-28 10:01:35,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:35,136 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-28 10:01:35,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-28 10:01:35,137 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 63 [2018-09-28 10:01:35,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:35,138 INFO L225 Difference]: With dead ends: 67 [2018-09-28 10:01:35,138 INFO L226 Difference]: Without dead ends: 65 [2018-09-28 10:01:35,138 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-28 10:01:35,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-28 10:01:35,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-28 10:01:35,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-28 10:01:35,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-09-28 10:01:35,141 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-09-28 10:01:35,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:35,141 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-09-28 10:01:35,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-28 10:01:35,141 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-09-28 10:01:35,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-28 10:01:35,141 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:35,141 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1, 1] [2018-09-28 10:01:35,142 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:35,142 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:35,142 INFO L82 PathProgramCache]: Analyzing trace with hash 941947112, now seen corresponding path program 61 times [2018-09-28 10:01:35,142 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:35,142 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:35,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:35,143 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:01:35,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:35,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:37,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:37,122 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:01:37,122 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:01:37,132 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:01:37,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:37,170 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:37,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:37,201 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:01:37,201 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-28 10:01:37,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-28 10:01:37,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-28 10:01:37,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-28 10:01:37,202 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 64 states. [2018-09-28 10:01:37,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:37,294 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-09-28 10:01:37,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-28 10:01:37,294 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 64 [2018-09-28 10:01:37,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:37,295 INFO L225 Difference]: With dead ends: 68 [2018-09-28 10:01:37,295 INFO L226 Difference]: Without dead ends: 66 [2018-09-28 10:01:37,296 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-28 10:01:37,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-28 10:01:37,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-09-28 10:01:37,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-28 10:01:37,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-09-28 10:01:37,298 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-09-28 10:01:37,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:37,298 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-09-28 10:01:37,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-28 10:01:37,299 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-09-28 10:01:37,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-28 10:01:37,299 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:37,299 INFO L375 BasicCegarLoop]: trace histogram [62, 1, 1, 1] [2018-09-28 10:01:37,299 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:37,299 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:37,299 INFO L82 PathProgramCache]: Analyzing trace with hash -864412575, now seen corresponding path program 62 times [2018-09-28 10:01:37,300 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:37,300 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:37,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:37,300 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:01:37,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:37,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:39,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:39,067 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:01:39,067 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:01:39,075 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:01:39,109 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:01:39,109 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:01:39,111 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:39,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:39,152 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:01:39,152 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-28 10:01:39,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-28 10:01:39,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-28 10:01:39,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-28 10:01:39,153 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 65 states. [2018-09-28 10:01:39,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:39,324 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-28 10:01:39,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-28 10:01:39,324 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 65 [2018-09-28 10:01:39,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:39,325 INFO L225 Difference]: With dead ends: 69 [2018-09-28 10:01:39,325 INFO L226 Difference]: Without dead ends: 67 [2018-09-28 10:01:39,326 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-28 10:01:39,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-28 10:01:39,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-28 10:01:39,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-28 10:01:39,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-09-28 10:01:39,329 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-09-28 10:01:39,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:39,329 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-09-28 10:01:39,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-28 10:01:39,329 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-09-28 10:01:39,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-28 10:01:39,329 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:39,329 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1, 1] [2018-09-28 10:01:39,330 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:39,330 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:39,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1026988024, now seen corresponding path program 63 times [2018-09-28 10:01:39,330 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:39,330 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:39,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:39,331 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:01:39,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:39,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:40,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:40,950 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:01:40,950 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:01:40,976 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:01:41,028 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-09-28 10:01:41,028 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:01:41,031 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:41,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:41,062 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:01:41,063 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-28 10:01:41,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-28 10:01:41,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-28 10:01:41,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-28 10:01:41,064 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 66 states. [2018-09-28 10:01:41,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:41,178 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-09-28 10:01:41,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-28 10:01:41,185 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 66 [2018-09-28 10:01:41,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:41,185 INFO L225 Difference]: With dead ends: 70 [2018-09-28 10:01:41,186 INFO L226 Difference]: Without dead ends: 68 [2018-09-28 10:01:41,186 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-28 10:01:41,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-28 10:01:41,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-09-28 10:01:41,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-28 10:01:41,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-09-28 10:01:41,189 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-09-28 10:01:41,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:41,189 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-09-28 10:01:41,189 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-28 10:01:41,189 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-09-28 10:01:41,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-09-28 10:01:41,190 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:41,190 INFO L375 BasicCegarLoop]: trace histogram [64, 1, 1, 1] [2018-09-28 10:01:41,190 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:41,191 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:41,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1771859647, now seen corresponding path program 64 times [2018-09-28 10:01:41,191 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:41,191 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:41,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:41,192 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:01:41,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:41,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:43,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:43,095 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:01:43,095 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:01:43,108 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:01:43,165 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:01:43,166 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:01:43,169 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:43,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:43,213 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:01:43,214 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-28 10:01:43,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-28 10:01:43,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-28 10:01:43,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-28 10:01:43,215 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 67 states. [2018-09-28 10:01:43,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:43,375 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-28 10:01:43,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-28 10:01:43,375 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 67 [2018-09-28 10:01:43,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:43,376 INFO L225 Difference]: With dead ends: 71 [2018-09-28 10:01:43,376 INFO L226 Difference]: Without dead ends: 69 [2018-09-28 10:01:43,376 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-28 10:01:43,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-28 10:01:43,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-28 10:01:43,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-28 10:01:43,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-09-28 10:01:43,379 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-09-28 10:01:43,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:43,379 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-09-28 10:01:43,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-28 10:01:43,379 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-09-28 10:01:43,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-28 10:01:43,380 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:43,380 INFO L375 BasicCegarLoop]: trace histogram [65, 1, 1, 1] [2018-09-28 10:01:43,380 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:43,380 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:43,381 INFO L82 PathProgramCache]: Analyzing trace with hash 906923816, now seen corresponding path program 65 times [2018-09-28 10:01:43,381 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:43,381 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:43,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:43,381 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:01:43,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:43,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:45,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:45,330 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:01:45,330 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:01:45,337 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:01:45,392 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-09-28 10:01:45,392 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:01:45,394 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:45,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:45,434 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:01:45,434 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-28 10:01:45,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-28 10:01:45,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-28 10:01:45,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-28 10:01:45,435 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 68 states. [2018-09-28 10:01:45,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:45,727 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-09-28 10:01:45,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-28 10:01:45,727 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 68 [2018-09-28 10:01:45,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:45,728 INFO L225 Difference]: With dead ends: 72 [2018-09-28 10:01:45,728 INFO L226 Difference]: Without dead ends: 70 [2018-09-28 10:01:45,729 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-28 10:01:45,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-28 10:01:45,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-09-28 10:01:45,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-28 10:01:45,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-09-28 10:01:45,732 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-09-28 10:01:45,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:45,732 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-09-28 10:01:45,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-28 10:01:45,732 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-09-28 10:01:45,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-09-28 10:01:45,732 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:45,732 INFO L375 BasicCegarLoop]: trace histogram [66, 1, 1, 1] [2018-09-28 10:01:45,732 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:45,733 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:45,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1950134751, now seen corresponding path program 66 times [2018-09-28 10:01:45,733 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:45,733 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:45,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:45,733 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:01:45,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:45,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:47,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:47,452 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:01:47,452 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:01:47,462 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:01:47,519 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-09-28 10:01:47,519 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:01:47,522 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:47,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:47,561 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:01:47,562 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-09-28 10:01:47,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-28 10:01:47,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-28 10:01:47,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-28 10:01:47,563 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 69 states. [2018-09-28 10:01:47,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:47,660 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-28 10:01:47,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-28 10:01:47,660 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 69 [2018-09-28 10:01:47,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:47,661 INFO L225 Difference]: With dead ends: 73 [2018-09-28 10:01:47,661 INFO L226 Difference]: Without dead ends: 71 [2018-09-28 10:01:47,662 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-28 10:01:47,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-28 10:01:47,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-28 10:01:47,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-28 10:01:47,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-09-28 10:01:47,665 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-09-28 10:01:47,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:47,665 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-09-28 10:01:47,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-28 10:01:47,665 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-09-28 10:01:47,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-28 10:01:47,666 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:47,666 INFO L375 BasicCegarLoop]: trace histogram [67, 1, 1, 1] [2018-09-28 10:01:47,666 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:47,666 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:47,666 INFO L82 PathProgramCache]: Analyzing trace with hash -324637112, now seen corresponding path program 67 times [2018-09-28 10:01:47,666 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:47,667 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:47,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:47,667 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:01:47,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:47,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:49,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:49,662 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:01:49,662 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:01:49,669 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:01:49,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:49,709 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:49,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:49,742 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:01:49,742 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-28 10:01:49,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-28 10:01:49,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-28 10:01:49,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-28 10:01:49,744 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 70 states. [2018-09-28 10:01:49,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:49,892 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-09-28 10:01:49,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-28 10:01:49,892 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 70 [2018-09-28 10:01:49,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:49,893 INFO L225 Difference]: With dead ends: 74 [2018-09-28 10:01:49,893 INFO L226 Difference]: Without dead ends: 72 [2018-09-28 10:01:49,894 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 [2018-09-28 10:01:49,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-09-28 10:01:49,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-09-28 10:01:49,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-09-28 10:01:49,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-09-28 10:01:49,895 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-09-28 10:01:49,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:49,896 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-09-28 10:01:49,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-28 10:01:49,896 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-09-28 10:01:49,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-09-28 10:01:49,896 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:49,896 INFO L375 BasicCegarLoop]: trace histogram [68, 1, 1, 1] [2018-09-28 10:01:49,897 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:49,897 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:49,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1473817855, now seen corresponding path program 68 times [2018-09-28 10:01:49,897 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:49,897 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:49,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:49,898 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:01:49,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:49,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:51,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:51,794 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:01:51,794 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:01:51,802 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:01:51,842 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:01:51,843 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:01:51,845 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:51,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:51,879 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:01:51,879 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-28 10:01:51,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-28 10:01:51,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-28 10:01:51,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-28 10:01:51,880 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 71 states. [2018-09-28 10:01:52,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:52,075 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-09-28 10:01:52,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-28 10:01:52,075 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 71 [2018-09-28 10:01:52,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:52,076 INFO L225 Difference]: With dead ends: 75 [2018-09-28 10:01:52,076 INFO L226 Difference]: Without dead ends: 73 [2018-09-28 10:01:52,077 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 [2018-09-28 10:01:52,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-28 10:01:52,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-28 10:01:52,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-28 10:01:52,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-09-28 10:01:52,079 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2018-09-28 10:01:52,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:52,079 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-09-28 10:01:52,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-28 10:01:52,079 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-09-28 10:01:52,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-28 10:01:52,079 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:52,080 INFO L375 BasicCegarLoop]: trace histogram [69, 1, 1, 1] [2018-09-28 10:01:52,080 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:52,080 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:52,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1556284776, now seen corresponding path program 69 times [2018-09-28 10:01:52,080 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:52,080 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:52,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:52,081 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:01:52,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:52,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:54,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:54,156 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:01:54,156 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:01:54,163 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:01:54,267 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-09-28 10:01:54,267 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:01:54,270 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:54,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:54,303 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:01:54,303 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-28 10:01:54,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-28 10:01:54,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-28 10:01:54,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-28 10:01:54,304 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 72 states. [2018-09-28 10:01:54,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:54,468 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-09-28 10:01:54,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-28 10:01:54,468 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 72 [2018-09-28 10:01:54,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:54,469 INFO L225 Difference]: With dead ends: 76 [2018-09-28 10:01:54,469 INFO L226 Difference]: Without dead ends: 74 [2018-09-28 10:01:54,470 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-28 10:01:54,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-28 10:01:54,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-09-28 10:01:54,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-28 10:01:54,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-09-28 10:01:54,474 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2018-09-28 10:01:54,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:54,474 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-09-28 10:01:54,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-28 10:01:54,475 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-09-28 10:01:54,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-09-28 10:01:54,475 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:54,475 INFO L375 BasicCegarLoop]: trace histogram [70, 1, 1, 1] [2018-09-28 10:01:54,476 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:54,476 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:54,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1000185825, now seen corresponding path program 70 times [2018-09-28 10:01:54,476 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:54,476 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:54,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:54,477 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:01:54,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:54,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:01:57,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:57,569 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:01:57,569 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:01:57,577 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:01:57,633 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:01:57,634 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:01:57,637 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:01:57,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:01:57,688 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:01:57,688 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-09-28 10:01:57,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-28 10:01:57,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-28 10:01:57,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-28 10:01:57,690 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 73 states. [2018-09-28 10:01:57,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:01:57,883 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-28 10:01:57,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-28 10:01:57,884 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 73 [2018-09-28 10:01:57,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:01:57,885 INFO L225 Difference]: With dead ends: 77 [2018-09-28 10:01:57,885 INFO L226 Difference]: Without dead ends: 75 [2018-09-28 10:01:57,885 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-28 10:01:57,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-28 10:01:57,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-28 10:01:57,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-28 10:01:57,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-09-28 10:01:57,888 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2018-09-28 10:01:57,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:01:57,889 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-09-28 10:01:57,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-28 10:01:57,889 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-09-28 10:01:57,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-28 10:01:57,889 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:01:57,890 INFO L375 BasicCegarLoop]: trace histogram [71, 1, 1, 1] [2018-09-28 10:01:57,890 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:01:57,890 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:01:57,890 INFO L82 PathProgramCache]: Analyzing trace with hash 940987528, now seen corresponding path program 71 times [2018-09-28 10:01:57,890 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:01:57,890 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:01:57,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:57,891 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:01:57,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:01:57,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:02:00,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:02:00,041 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:02:00,041 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:02:00,048 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:02:00,270 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-09-28 10:02:00,270 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:02:00,275 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:02:00,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:02:00,325 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:02:00,326 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-28 10:02:00,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-28 10:02:00,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-28 10:02:00,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-28 10:02:00,327 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 74 states. [2018-09-28 10:02:00,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:02:00,664 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-09-28 10:02:00,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-28 10:02:00,664 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 74 [2018-09-28 10:02:00,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:02:00,665 INFO L225 Difference]: With dead ends: 78 [2018-09-28 10:02:00,666 INFO L226 Difference]: Without dead ends: 76 [2018-09-28 10:02:00,666 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-28 10:02:00,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-09-28 10:02:00,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-09-28 10:02:00,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-28 10:02:00,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-09-28 10:02:00,670 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2018-09-28 10:02:00,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:02:00,670 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-09-28 10:02:00,671 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-28 10:02:00,671 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-09-28 10:02:00,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-09-28 10:02:00,671 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:02:00,671 INFO L375 BasicCegarLoop]: trace histogram [72, 1, 1, 1] [2018-09-28 10:02:00,672 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:02:00,672 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:02:00,672 INFO L82 PathProgramCache]: Analyzing trace with hash -894159679, now seen corresponding path program 72 times [2018-09-28 10:02:00,672 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:02:00,672 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:02:00,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:00,673 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:02:00,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:00,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:02:02,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:02:02,790 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:02:02,790 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:02:02,798 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:02:02,855 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-28 10:02:02,856 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:02:02,858 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:02:02,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:02:02,905 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:02:02,906 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-09-28 10:02:02,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-28 10:02:02,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-28 10:02:02,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-28 10:02:02,907 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 75 states. [2018-09-28 10:02:03,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:02:03,022 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-09-28 10:02:03,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-28 10:02:03,023 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 75 [2018-09-28 10:02:03,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:02:03,024 INFO L225 Difference]: With dead ends: 79 [2018-09-28 10:02:03,024 INFO L226 Difference]: Without dead ends: 77 [2018-09-28 10:02:03,024 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 [2018-09-28 10:02:03,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-28 10:02:03,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-28 10:02:03,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-28 10:02:03,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-09-28 10:02:03,027 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2018-09-28 10:02:03,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:02:03,028 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-09-28 10:02:03,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-28 10:02:03,028 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-09-28 10:02:03,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-28 10:02:03,028 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:02:03,028 INFO L375 BasicCegarLoop]: trace histogram [73, 1, 1, 1] [2018-09-28 10:02:03,029 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:02:03,029 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:02:03,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1949148248, now seen corresponding path program 73 times [2018-09-28 10:02:03,029 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:02:03,029 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:02:03,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:03,030 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:02:03,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:03,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:02:06,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:02:06,360 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:02:06,360 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:02:06,368 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:02:06,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:02:06,411 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:02:06,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:02:06,444 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:02:06,445 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-28 10:02:06,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-28 10:02:06,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-28 10:02:06,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-28 10:02:06,446 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 76 states. [2018-09-28 10:02:06,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:02:06,611 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-09-28 10:02:06,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-28 10:02:06,611 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 76 [2018-09-28 10:02:06,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:02:06,612 INFO L225 Difference]: With dead ends: 80 [2018-09-28 10:02:06,612 INFO L226 Difference]: Without dead ends: 78 [2018-09-28 10:02:06,613 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-28 10:02:06,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-09-28 10:02:06,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-09-28 10:02:06,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-09-28 10:02:06,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-09-28 10:02:06,615 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2018-09-28 10:02:06,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:02:06,616 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-09-28 10:02:06,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-28 10:02:06,616 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-09-28 10:02:06,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-09-28 10:02:06,616 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:02:06,616 INFO L375 BasicCegarLoop]: trace histogram [74, 1, 1, 1] [2018-09-28 10:02:06,616 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:02:06,616 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:02:06,617 INFO L82 PathProgramCache]: Analyzing trace with hash -294055519, now seen corresponding path program 74 times [2018-09-28 10:02:06,617 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:02:06,617 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:02:06,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:06,617 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:02:06,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:06,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:02:08,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:02:08,660 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:02:08,660 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:02:08,668 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:02:08,708 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:02:08,708 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:02:08,711 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:02:08,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:02:08,748 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:02:08,749 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-09-28 10:02:08,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-28 10:02:08,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-28 10:02:08,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-28 10:02:08,750 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 77 states. [2018-09-28 10:02:08,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:02:08,929 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-09-28 10:02:08,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-28 10:02:08,929 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 77 [2018-09-28 10:02:08,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:02:08,930 INFO L225 Difference]: With dead ends: 81 [2018-09-28 10:02:08,930 INFO L226 Difference]: Without dead ends: 79 [2018-09-28 10:02:08,931 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-28 10:02:08,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-28 10:02:08,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-28 10:02:08,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-28 10:02:08,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-09-28 10:02:08,934 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2018-09-28 10:02:08,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:02:08,934 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-09-28 10:02:08,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-28 10:02:08,934 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-09-28 10:02:08,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-28 10:02:08,935 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:02:08,935 INFO L375 BasicCegarLoop]: trace histogram [75, 1, 1, 1] [2018-09-28 10:02:08,935 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:02:08,935 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:02:08,935 INFO L82 PathProgramCache]: Analyzing trace with hash -525788472, now seen corresponding path program 75 times [2018-09-28 10:02:08,936 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:02:08,936 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:02:08,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:08,936 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:02:08,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:08,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:02:11,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:02:11,940 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:02:11,940 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:02:11,949 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:02:12,010 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-09-28 10:02:12,010 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:02:12,013 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:02:12,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:02:12,046 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:02:12,046 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-09-28 10:02:12,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-28 10:02:12,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-28 10:02:12,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-28 10:02:12,047 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 78 states. [2018-09-28 10:02:12,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:02:12,469 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-09-28 10:02:12,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-28 10:02:12,469 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 78 [2018-09-28 10:02:12,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:02:12,470 INFO L225 Difference]: With dead ends: 82 [2018-09-28 10:02:12,470 INFO L226 Difference]: Without dead ends: 80 [2018-09-28 10:02:12,471 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-28 10:02:12,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-28 10:02:12,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-09-28 10:02:12,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-28 10:02:12,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-09-28 10:02:12,474 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2018-09-28 10:02:12,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:02:12,474 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-09-28 10:02:12,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-28 10:02:12,475 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-09-28 10:02:12,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-09-28 10:02:12,475 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:02:12,475 INFO L375 BasicCegarLoop]: trace histogram [76, 1, 1, 1] [2018-09-28 10:02:12,476 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:02:12,476 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:02:12,476 INFO L82 PathProgramCache]: Analyzing trace with hash 880424577, now seen corresponding path program 76 times [2018-09-28 10:02:12,476 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:02:12,476 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:02:12,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:12,477 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:02:12,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:12,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:02:15,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:02:15,098 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:02:15,098 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:02:15,105 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:02:15,156 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:02:15,156 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:02:15,159 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:02:15,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:02:15,209 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:02:15,209 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-09-28 10:02:15,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-28 10:02:15,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-28 10:02:15,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-28 10:02:15,211 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 79 states. [2018-09-28 10:02:15,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:02:15,798 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-09-28 10:02:15,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-28 10:02:15,799 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 79 [2018-09-28 10:02:15,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:02:15,799 INFO L225 Difference]: With dead ends: 83 [2018-09-28 10:02:15,800 INFO L226 Difference]: Without dead ends: 81 [2018-09-28 10:02:15,800 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-28 10:02:15,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-28 10:02:15,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-28 10:02:15,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-28 10:02:15,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-09-28 10:02:15,803 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2018-09-28 10:02:15,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:02:15,803 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-09-28 10:02:15,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-28 10:02:15,803 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-09-28 10:02:15,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-28 10:02:15,804 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:02:15,804 INFO L375 BasicCegarLoop]: trace histogram [77, 1, 1, 1] [2018-09-28 10:02:15,804 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:02:15,805 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:02:15,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1523356136, now seen corresponding path program 77 times [2018-09-28 10:02:15,805 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:02:15,806 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:02:15,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:15,806 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:02:15,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:15,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:02:18,772 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:02:18,772 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:02:18,772 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:02:18,779 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:02:18,874 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-09-28 10:02:18,874 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:02:18,879 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:02:18,899 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:02:18,921 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:02:18,921 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-09-28 10:02:18,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-28 10:02:18,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-28 10:02:18,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-28 10:02:18,923 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 80 states. [2018-09-28 10:02:19,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:02:19,153 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2018-09-28 10:02:19,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-28 10:02:19,153 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 80 [2018-09-28 10:02:19,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:02:19,154 INFO L225 Difference]: With dead ends: 84 [2018-09-28 10:02:19,154 INFO L226 Difference]: Without dead ends: 82 [2018-09-28 10:02:19,155 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-28 10:02:19,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-28 10:02:19,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-09-28 10:02:19,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-09-28 10:02:19,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-09-28 10:02:19,157 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2018-09-28 10:02:19,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:02:19,157 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-09-28 10:02:19,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-28 10:02:19,157 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-09-28 10:02:19,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-09-28 10:02:19,158 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:02:19,158 INFO L375 BasicCegarLoop]: trace histogram [78, 1, 1, 1] [2018-09-28 10:02:19,158 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:02:19,158 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:02:19,158 INFO L82 PathProgramCache]: Analyzing trace with hash -20602015, now seen corresponding path program 78 times [2018-09-28 10:02:19,158 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:02:19,158 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:02:19,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:19,159 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:02:19,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:19,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:02:22,130 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:02:22,131 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:02:22,131 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:02:22,141 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:02:22,565 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2018-09-28 10:02:22,566 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:02:22,570 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:02:22,591 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:02:22,624 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:02:22,624 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-09-28 10:02:22,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-28 10:02:22,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-28 10:02:22,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-28 10:02:22,626 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 81 states. [2018-09-28 10:02:22,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:02:22,839 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-09-28 10:02:22,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-28 10:02:22,839 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 81 [2018-09-28 10:02:22,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:02:22,840 INFO L225 Difference]: With dead ends: 85 [2018-09-28 10:02:22,840 INFO L226 Difference]: Without dead ends: 83 [2018-09-28 10:02:22,840 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-28 10:02:22,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-28 10:02:22,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-28 10:02:22,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-28 10:02:22,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-09-28 10:02:22,844 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2018-09-28 10:02:22,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:02:22,844 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-09-28 10:02:22,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-28 10:02:22,844 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-09-28 10:02:22,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-28 10:02:22,845 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:02:22,845 INFO L375 BasicCegarLoop]: trace histogram [79, 1, 1, 1] [2018-09-28 10:02:22,845 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:02:22,845 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:02:22,845 INFO L82 PathProgramCache]: Analyzing trace with hash -638664440, now seen corresponding path program 79 times [2018-09-28 10:02:22,845 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:02:22,846 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:02:22,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:22,846 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:02:22,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:22,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:02:25,449 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:02:25,449 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:02:25,449 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:02:25,456 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:02:25,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:02:25,500 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:02:25,514 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:02:25,536 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:02:25,536 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-09-28 10:02:25,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-28 10:02:25,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-28 10:02:25,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-28 10:02:25,537 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 82 states. [2018-09-28 10:02:25,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:02:25,713 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-09-28 10:02:25,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-28 10:02:25,714 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 82 [2018-09-28 10:02:25,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:02:25,714 INFO L225 Difference]: With dead ends: 86 [2018-09-28 10:02:25,715 INFO L226 Difference]: Without dead ends: 84 [2018-09-28 10:02:25,715 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-28 10:02:25,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-09-28 10:02:25,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-09-28 10:02:25,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-09-28 10:02:25,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-09-28 10:02:25,717 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2018-09-28 10:02:25,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:02:25,717 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-09-28 10:02:25,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-28 10:02:25,717 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-09-28 10:02:25,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-28 10:02:25,717 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:02:25,718 INFO L375 BasicCegarLoop]: trace histogram [80, 1, 1, 1] [2018-09-28 10:02:25,718 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:02:25,718 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:02:25,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1676236865, now seen corresponding path program 80 times [2018-09-28 10:02:25,718 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:02:25,718 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:02:25,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:25,719 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:02:25,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:25,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:02:28,097 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:02:28,098 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:02:28,098 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:02:28,106 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:02:28,146 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:02:28,147 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:02:28,149 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:02:28,171 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:02:28,205 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:02:28,205 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-09-28 10:02:28,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-28 10:02:28,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-28 10:02:28,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-28 10:02:28,207 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 83 states. [2018-09-28 10:02:29,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:02:29,662 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-09-28 10:02:29,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-28 10:02:29,663 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 83 [2018-09-28 10:02:29,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:02:29,663 INFO L225 Difference]: With dead ends: 87 [2018-09-28 10:02:29,663 INFO L226 Difference]: Without dead ends: 85 [2018-09-28 10:02:29,664 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-28 10:02:29,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-28 10:02:29,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-28 10:02:29,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-28 10:02:29,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-09-28 10:02:29,665 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2018-09-28 10:02:29,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:02:29,666 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-09-28 10:02:29,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-28 10:02:29,666 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-09-28 10:02:29,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-28 10:02:29,666 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:02:29,666 INFO L375 BasicCegarLoop]: trace histogram [81, 1, 1, 1] [2018-09-28 10:02:29,666 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:02:29,666 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:02:29,667 INFO L82 PathProgramCache]: Analyzing trace with hash 423733288, now seen corresponding path program 81 times [2018-09-28 10:02:29,667 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:02:29,667 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:02:29,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:29,667 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:02:29,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:29,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:02:32,314 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:02:32,314 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:02:32,314 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:02:32,321 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:02:32,388 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-09-28 10:02:32,388 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:02:32,391 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:02:32,412 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:02:32,442 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:02:32,443 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-09-28 10:02:32,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-28 10:02:32,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-28 10:02:32,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-28 10:02:32,445 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 84 states. [2018-09-28 10:02:32,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:02:32,682 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-09-28 10:02:32,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-28 10:02:32,682 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 84 [2018-09-28 10:02:32,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:02:32,683 INFO L225 Difference]: With dead ends: 88 [2018-09-28 10:02:32,683 INFO L226 Difference]: Without dead ends: 86 [2018-09-28 10:02:32,683 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-28 10:02:32,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-09-28 10:02:32,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-09-28 10:02:32,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-09-28 10:02:32,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-09-28 10:02:32,685 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2018-09-28 10:02:32,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:02:32,685 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-09-28 10:02:32,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-28 10:02:32,686 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-09-28 10:02:32,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-09-28 10:02:32,686 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:02:32,686 INFO L375 BasicCegarLoop]: trace histogram [82, 1, 1, 1] [2018-09-28 10:02:32,686 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:02:32,686 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:02:32,687 INFO L82 PathProgramCache]: Analyzing trace with hash 250828065, now seen corresponding path program 82 times [2018-09-28 10:02:32,687 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:02:32,687 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:02:32,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:32,687 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:02:32,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:32,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:02:35,485 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:02:35,486 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:02:35,486 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:02:35,494 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:02:35,538 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:02:35,538 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:02:35,541 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:02:35,564 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:02:35,596 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:02:35,596 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-09-28 10:02:35,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-09-28 10:02:35,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-09-28 10:02:35,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-28 10:02:35,598 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 85 states. [2018-09-28 10:02:36,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:02:36,750 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-09-28 10:02:36,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-28 10:02:36,751 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 85 [2018-09-28 10:02:36,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:02:36,752 INFO L225 Difference]: With dead ends: 89 [2018-09-28 10:02:36,752 INFO L226 Difference]: Without dead ends: 87 [2018-09-28 10:02:36,753 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-28 10:02:36,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-28 10:02:36,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-09-28 10:02:36,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-28 10:02:36,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-09-28 10:02:36,756 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2018-09-28 10:02:36,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:02:36,756 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-09-28 10:02:36,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-09-28 10:02:36,756 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-09-28 10:02:36,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-28 10:02:36,757 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:02:36,757 INFO L375 BasicCegarLoop]: trace histogram [83, 1, 1, 1] [2018-09-28 10:02:36,757 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:02:36,757 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:02:36,757 INFO L82 PathProgramCache]: Analyzing trace with hash -814266552, now seen corresponding path program 83 times [2018-09-28 10:02:36,757 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:02:36,758 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:02:36,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:36,758 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:02:36,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:36,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:02:39,285 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:02:39,285 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:02:39,285 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:02:39,293 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:02:39,363 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-09-28 10:02:39,363 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:02:39,367 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:02:39,381 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:02:39,402 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:02:39,402 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-09-28 10:02:39,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-28 10:02:39,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-28 10:02:39,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-28 10:02:39,403 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 86 states. [2018-09-28 10:02:39,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:02:39,731 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2018-09-28 10:02:39,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-28 10:02:39,731 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 86 [2018-09-28 10:02:39,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:02:39,732 INFO L225 Difference]: With dead ends: 90 [2018-09-28 10:02:39,732 INFO L226 Difference]: Without dead ends: 88 [2018-09-28 10:02:39,732 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-28 10:02:39,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-09-28 10:02:39,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-09-28 10:02:39,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-09-28 10:02:39,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-09-28 10:02:39,735 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2018-09-28 10:02:39,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:02:39,739 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-09-28 10:02:39,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-28 10:02:39,739 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-09-28 10:02:39,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-09-28 10:02:39,740 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:02:39,740 INFO L375 BasicCegarLoop]: trace histogram [84, 1, 1, 1] [2018-09-28 10:02:39,740 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:02:39,742 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:02:39,742 INFO L82 PathProgramCache]: Analyzing trace with hash 527538689, now seen corresponding path program 84 times [2018-09-28 10:02:39,742 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:02:39,742 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:02:39,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:39,744 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:02:39,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:39,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:02:42,675 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:02:42,675 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:02:42,675 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:02:42,683 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:02:42,751 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-28 10:02:42,751 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:02:42,754 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:02:42,775 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:02:42,806 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:02:42,807 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-09-28 10:02:42,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-09-28 10:02:42,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-09-28 10:02:42,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-28 10:02:42,809 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 87 states. [2018-09-28 10:02:43,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:02:43,106 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-09-28 10:02:43,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-28 10:02:43,107 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 87 [2018-09-28 10:02:43,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:02:43,108 INFO L225 Difference]: With dead ends: 91 [2018-09-28 10:02:43,108 INFO L226 Difference]: Without dead ends: 89 [2018-09-28 10:02:43,108 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-28 10:02:43,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-28 10:02:43,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-09-28 10:02:43,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-28 10:02:43,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-09-28 10:02:43,112 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2018-09-28 10:02:43,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:02:43,112 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-09-28 10:02:43,112 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-09-28 10:02:43,112 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-09-28 10:02:43,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-28 10:02:43,113 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:02:43,113 INFO L375 BasicCegarLoop]: trace histogram [85, 1, 1, 1] [2018-09-28 10:02:43,113 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:02:43,113 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:02:43,113 INFO L82 PathProgramCache]: Analyzing trace with hash -826171800, now seen corresponding path program 85 times [2018-09-28 10:02:43,113 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:02:43,114 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:02:43,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:43,114 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:02:43,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:43,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:02:46,154 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:02:46,154 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:02:46,154 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:02:46,162 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:02:46,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:02:46,211 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:02:46,226 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:02:46,247 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:02:46,247 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-09-28 10:02:46,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-28 10:02:46,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-28 10:02:46,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-28 10:02:46,249 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 88 states. [2018-09-28 10:02:46,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:02:46,411 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2018-09-28 10:02:46,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-28 10:02:46,411 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 88 [2018-09-28 10:02:46,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:02:46,412 INFO L225 Difference]: With dead ends: 92 [2018-09-28 10:02:46,413 INFO L226 Difference]: Without dead ends: 90 [2018-09-28 10:02:46,413 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-28 10:02:46,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-09-28 10:02:46,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-09-28 10:02:46,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-09-28 10:02:46,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-09-28 10:02:46,417 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2018-09-28 10:02:46,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:02:46,417 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-09-28 10:02:46,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-28 10:02:46,417 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-09-28 10:02:46,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-09-28 10:02:46,418 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:02:46,418 INFO L375 BasicCegarLoop]: trace histogram [86, 1, 1, 1] [2018-09-28 10:02:46,418 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:02:46,418 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:02:46,419 INFO L82 PathProgramCache]: Analyzing trace with hash 158476001, now seen corresponding path program 86 times [2018-09-28 10:02:46,419 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:02:46,419 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:02:46,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:46,419 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:02:46,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:46,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:02:49,163 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:02:49,163 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:02:49,163 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:02:49,170 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:02:49,218 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:02:49,219 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:02:49,221 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:02:49,237 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:02:49,257 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:02:49,257 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-09-28 10:02:49,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-28 10:02:49,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-28 10:02:49,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-28 10:02:49,259 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 89 states. [2018-09-28 10:02:49,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:02:49,494 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-09-28 10:02:49,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-28 10:02:49,494 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 89 [2018-09-28 10:02:49,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:02:49,495 INFO L225 Difference]: With dead ends: 93 [2018-09-28 10:02:49,496 INFO L226 Difference]: Without dead ends: 91 [2018-09-28 10:02:49,496 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-28 10:02:49,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-28 10:02:49,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-28 10:02:49,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-28 10:02:49,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-09-28 10:02:49,499 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2018-09-28 10:02:49,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:02:49,499 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-09-28 10:02:49,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-28 10:02:49,499 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-09-28 10:02:49,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-28 10:02:49,500 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:02:49,500 INFO L375 BasicCegarLoop]: trace histogram [87, 1, 1, 1] [2018-09-28 10:02:49,500 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:02:49,500 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:02:49,500 INFO L82 PathProgramCache]: Analyzing trace with hash 617786760, now seen corresponding path program 87 times [2018-09-28 10:02:49,500 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:02:49,501 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:02:49,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:49,501 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:02:49,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:49,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:02:52,630 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:02:52,630 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:02:52,630 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:02:52,638 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:02:52,717 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-09-28 10:02:52,717 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:02:52,720 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:02:52,735 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:02:52,756 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:02:52,756 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-09-28 10:02:52,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-28 10:02:52,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-28 10:02:52,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-28 10:02:52,757 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 90 states. [2018-09-28 10:02:52,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:02:52,975 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-09-28 10:02:52,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-28 10:02:52,986 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 90 [2018-09-28 10:02:52,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:02:52,986 INFO L225 Difference]: With dead ends: 94 [2018-09-28 10:02:52,987 INFO L226 Difference]: Without dead ends: 92 [2018-09-28 10:02:52,987 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-28 10:02:52,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-09-28 10:02:52,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-09-28 10:02:52,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-09-28 10:02:52,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-09-28 10:02:52,990 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2018-09-28 10:02:52,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:02:52,991 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-09-28 10:02:52,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-28 10:02:52,991 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-09-28 10:02:52,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-09-28 10:02:52,991 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:02:52,992 INFO L375 BasicCegarLoop]: trace histogram [88, 1, 1, 1] [2018-09-28 10:02:52,992 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:02:52,992 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:02:52,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1971518401, now seen corresponding path program 88 times [2018-09-28 10:02:52,992 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:02:52,992 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:02:52,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:52,993 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:02:52,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:53,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:02:56,151 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:02:56,151 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:02:56,151 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:02:56,160 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:02:56,218 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:02:56,219 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:02:56,221 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:02:56,244 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:02:56,271 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:02:56,272 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-09-28 10:02:56,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-09-28 10:02:56,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-09-28 10:02:56,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-28 10:02:56,273 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 91 states. [2018-09-28 10:02:56,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:02:56,414 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-09-28 10:02:56,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-28 10:02:56,415 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 91 [2018-09-28 10:02:56,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:02:56,416 INFO L225 Difference]: With dead ends: 95 [2018-09-28 10:02:56,416 INFO L226 Difference]: Without dead ends: 93 [2018-09-28 10:02:56,416 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 [2018-09-28 10:02:56,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-28 10:02:56,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-28 10:02:56,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-28 10:02:56,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-09-28 10:02:56,419 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2018-09-28 10:02:56,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:02:56,420 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-09-28 10:02:56,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-09-28 10:02:56,420 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-09-28 10:02:56,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-28 10:02:56,420 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:02:56,420 INFO L375 BasicCegarLoop]: trace histogram [89, 1, 1, 1] [2018-09-28 10:02:56,420 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:02:56,421 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:02:56,421 INFO L82 PathProgramCache]: Analyzing trace with hash 987526312, now seen corresponding path program 89 times [2018-09-28 10:02:56,421 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:02:56,421 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:02:56,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:56,421 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:02:56,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:56,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:02:59,322 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:02:59,322 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:02:59,322 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:02:59,329 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:02:59,412 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-09-28 10:02:59,413 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:02:59,416 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:02:59,431 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:02:59,451 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:02:59,451 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-09-28 10:02:59,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-28 10:02:59,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-28 10:02:59,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-28 10:02:59,453 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 92 states. [2018-09-28 10:02:59,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:02:59,700 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2018-09-28 10:02:59,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-28 10:02:59,700 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 92 [2018-09-28 10:02:59,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:02:59,701 INFO L225 Difference]: With dead ends: 96 [2018-09-28 10:02:59,701 INFO L226 Difference]: Without dead ends: 94 [2018-09-28 10:02:59,702 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 [2018-09-28 10:02:59,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-09-28 10:02:59,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-09-28 10:02:59,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-09-28 10:02:59,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-09-28 10:02:59,705 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2018-09-28 10:02:59,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:02:59,705 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-09-28 10:02:59,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-28 10:02:59,705 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-09-28 10:02:59,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-09-28 10:02:59,706 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:02:59,706 INFO L375 BasicCegarLoop]: trace histogram [90, 1, 1, 1] [2018-09-28 10:02:59,706 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:02:59,706 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:02:59,706 INFO L82 PathProgramCache]: Analyzing trace with hash 548542625, now seen corresponding path program 90 times [2018-09-28 10:02:59,706 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:02:59,706 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:02:59,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:59,707 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:02:59,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:02:59,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:03:03,056 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:03,056 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:03:03,057 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:03:03,064 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:03:03,145 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2018-09-28 10:03:03,145 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:03:03,148 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:03:03,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:03,184 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:03:03,184 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-09-28 10:03:03,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-09-28 10:03:03,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-09-28 10:03:03,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-28 10:03:03,186 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 93 states. [2018-09-28 10:03:03,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:03:03,455 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-09-28 10:03:03,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-28 10:03:03,456 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 93 [2018-09-28 10:03:03,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:03:03,457 INFO L225 Difference]: With dead ends: 97 [2018-09-28 10:03:03,457 INFO L226 Difference]: Without dead ends: 95 [2018-09-28 10:03:03,457 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-28 10:03:03,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-28 10:03:03,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-28 10:03:03,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-28 10:03:03,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-09-28 10:03:03,460 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2018-09-28 10:03:03,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:03:03,460 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-09-28 10:03:03,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-09-28 10:03:03,460 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-09-28 10:03:03,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-28 10:03:03,461 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:03:03,461 INFO L375 BasicCegarLoop]: trace histogram [91, 1, 1, 1] [2018-09-28 10:03:03,461 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:03:03,461 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:03:03,461 INFO L82 PathProgramCache]: Analyzing trace with hash -175049784, now seen corresponding path program 91 times [2018-09-28 10:03:03,461 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:03:03,462 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:03:03,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:03,462 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:03:03,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:03,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:03:06,846 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:06,846 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:03:06,846 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:03:06,854 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:03:06,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:03:06,906 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:03:06,923 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:06,943 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:03:06,943 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-09-28 10:03:06,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-28 10:03:06,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-28 10:03:06,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-28 10:03:06,944 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 94 states. [2018-09-28 10:03:07,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:03:07,201 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-09-28 10:03:07,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-28 10:03:07,201 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 94 [2018-09-28 10:03:07,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:03:07,202 INFO L225 Difference]: With dead ends: 98 [2018-09-28 10:03:07,202 INFO L226 Difference]: Without dead ends: 96 [2018-09-28 10:03:07,203 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-28 10:03:07,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-09-28 10:03:07,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-09-28 10:03:07,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-09-28 10:03:07,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-09-28 10:03:07,206 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2018-09-28 10:03:07,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:03:07,206 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-09-28 10:03:07,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-28 10:03:07,206 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-09-28 10:03:07,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-09-28 10:03:07,207 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:03:07,207 INFO L375 BasicCegarLoop]: trace histogram [92, 1, 1, 1] [2018-09-28 10:03:07,207 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:03:07,207 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:03:07,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1131577983, now seen corresponding path program 92 times [2018-09-28 10:03:07,207 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:03:07,207 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:03:07,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:07,208 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:03:07,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:07,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:03:10,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:10,315 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:03:10,315 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:03:10,321 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:03:10,371 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:03:10,372 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:03:10,374 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:03:10,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:10,411 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:03:10,411 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-09-28 10:03:10,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-09-28 10:03:10,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-09-28 10:03:10,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-28 10:03:10,413 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 95 states. [2018-09-28 10:03:10,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:03:10,660 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-09-28 10:03:10,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-28 10:03:10,660 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 95 [2018-09-28 10:03:10,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:03:10,661 INFO L225 Difference]: With dead ends: 99 [2018-09-28 10:03:10,661 INFO L226 Difference]: Without dead ends: 97 [2018-09-28 10:03:10,661 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-28 10:03:10,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-28 10:03:10,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-28 10:03:10,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-28 10:03:10,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-09-28 10:03:10,663 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2018-09-28 10:03:10,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:03:10,663 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-09-28 10:03:10,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-09-28 10:03:10,664 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-09-28 10:03:10,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-28 10:03:10,664 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:03:10,664 INFO L375 BasicCegarLoop]: trace histogram [93, 1, 1, 1] [2018-09-28 10:03:10,664 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:03:10,664 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:03:10,664 INFO L82 PathProgramCache]: Analyzing trace with hash -719181080, now seen corresponding path program 93 times [2018-09-28 10:03:10,665 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:03:10,665 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:03:10,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:10,665 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:03:10,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:10,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:03:14,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:14,528 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:03:14,528 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:03:14,535 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:03:14,628 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-09-28 10:03:14,628 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:03:14,632 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:03:14,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:14,687 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:03:14,687 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-09-28 10:03:14,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-28 10:03:14,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-28 10:03:14,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-28 10:03:14,690 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 96 states. [2018-09-28 10:03:14,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:03:14,910 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2018-09-28 10:03:14,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-28 10:03:14,911 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 96 [2018-09-28 10:03:14,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:03:14,912 INFO L225 Difference]: With dead ends: 100 [2018-09-28 10:03:14,912 INFO L226 Difference]: Without dead ends: 98 [2018-09-28 10:03:14,913 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-28 10:03:14,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-09-28 10:03:14,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-09-28 10:03:14,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-09-28 10:03:14,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-09-28 10:03:14,915 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2018-09-28 10:03:14,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:03:14,915 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-09-28 10:03:14,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-28 10:03:14,916 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-09-28 10:03:14,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-09-28 10:03:14,916 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:03:14,916 INFO L375 BasicCegarLoop]: trace histogram [94, 1, 1, 1] [2018-09-28 10:03:14,916 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:03:14,917 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:03:14,917 INFO L82 PathProgramCache]: Analyzing trace with hash -819778975, now seen corresponding path program 94 times [2018-09-28 10:03:14,917 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:03:14,917 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:03:14,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:14,918 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:03:14,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:14,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:03:18,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:18,441 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:03:18,441 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:03:18,449 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:03:18,502 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:03:18,502 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:03:18,505 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:03:18,529 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:18,558 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:03:18,558 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-09-28 10:03:18,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-09-28 10:03:18,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-09-28 10:03:18,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-28 10:03:18,560 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 97 states. [2018-09-28 10:03:18,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:03:18,794 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-09-28 10:03:18,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-28 10:03:18,794 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 97 [2018-09-28 10:03:18,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:03:18,795 INFO L225 Difference]: With dead ends: 101 [2018-09-28 10:03:18,795 INFO L226 Difference]: Without dead ends: 99 [2018-09-28 10:03:18,796 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-28 10:03:18,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-28 10:03:18,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-28 10:03:18,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-28 10:03:18,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-09-28 10:03:18,800 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2018-09-28 10:03:18,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:03:18,800 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-09-28 10:03:18,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-09-28 10:03:18,800 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-09-28 10:03:18,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-28 10:03:18,804 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:03:18,804 INFO L375 BasicCegarLoop]: trace histogram [95, 1, 1, 1] [2018-09-28 10:03:18,805 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:03:18,805 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:03:18,805 INFO L82 PathProgramCache]: Analyzing trace with hash 356653576, now seen corresponding path program 95 times [2018-09-28 10:03:18,805 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:03:18,805 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:03:18,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:18,806 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:03:18,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:18,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:03:22,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:22,446 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:03:22,446 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:03:22,456 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:03:22,554 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-09-28 10:03:22,554 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:03:22,558 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:03:22,574 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:22,594 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:03:22,595 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-09-28 10:03:22,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-28 10:03:22,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-28 10:03:22,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-09-28 10:03:22,596 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 98 states. [2018-09-28 10:03:23,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:03:23,096 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2018-09-28 10:03:23,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-09-28 10:03:23,097 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 98 [2018-09-28 10:03:23,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:03:23,098 INFO L225 Difference]: With dead ends: 102 [2018-09-28 10:03:23,098 INFO L226 Difference]: Without dead ends: 100 [2018-09-28 10:03:23,099 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-09-28 10:03:23,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-09-28 10:03:23,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-09-28 10:03:23,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-09-28 10:03:23,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-09-28 10:03:23,102 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2018-09-28 10:03:23,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:03:23,102 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-09-28 10:03:23,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-28 10:03:23,102 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-09-28 10:03:23,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-09-28 10:03:23,103 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:03:23,103 INFO L375 BasicCegarLoop]: trace histogram [96, 1, 1, 1] [2018-09-28 10:03:23,103 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:03:23,103 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:03:23,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1828643007, now seen corresponding path program 96 times [2018-09-28 10:03:23,104 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:03:23,104 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:03:23,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:23,104 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:03:23,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:23,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:03:26,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:26,687 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:03:26,687 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:03:26,695 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:03:26,780 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-28 10:03:26,781 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:03:26,784 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:03:26,802 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:26,822 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:03:26,822 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-09-28 10:03:26,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-09-28 10:03:26,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-09-28 10:03:26,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-09-28 10:03:26,823 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 99 states. [2018-09-28 10:03:27,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:03:27,110 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-09-28 10:03:27,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-09-28 10:03:27,111 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 99 [2018-09-28 10:03:27,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:03:27,112 INFO L225 Difference]: With dead ends: 103 [2018-09-28 10:03:27,112 INFO L226 Difference]: Without dead ends: 101 [2018-09-28 10:03:27,112 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-09-28 10:03:27,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-28 10:03:27,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-28 10:03:27,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-28 10:03:27,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-09-28 10:03:27,115 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2018-09-28 10:03:27,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:03:27,115 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-09-28 10:03:27,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-09-28 10:03:27,115 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-09-28 10:03:27,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-28 10:03:27,116 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:03:27,116 INFO L375 BasicCegarLoop]: trace histogram [97, 1, 1, 1] [2018-09-28 10:03:27,116 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:03:27,116 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:03:27,116 INFO L82 PathProgramCache]: Analyzing trace with hash -853360344, now seen corresponding path program 97 times [2018-09-28 10:03:27,116 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:03:27,116 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:03:27,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:27,117 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:03:27,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:27,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:03:30,509 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:30,509 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:03:30,509 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:03:30,517 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:03:30,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:03:30,570 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:03:30,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:30,608 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:03:30,608 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-09-28 10:03:30,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-28 10:03:30,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-28 10:03:30,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-09-28 10:03:30,610 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 100 states. [2018-09-28 10:03:30,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:03:30,888 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2018-09-28 10:03:30,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-09-28 10:03:30,888 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 100 [2018-09-28 10:03:30,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:03:30,889 INFO L225 Difference]: With dead ends: 104 [2018-09-28 10:03:30,890 INFO L226 Difference]: Without dead ends: 102 [2018-09-28 10:03:30,890 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-09-28 10:03:30,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-09-28 10:03:30,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-09-28 10:03:30,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-09-28 10:03:30,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-09-28 10:03:30,893 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2018-09-28 10:03:30,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:03:30,893 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-09-28 10:03:30,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-28 10:03:30,893 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-09-28 10:03:30,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-09-28 10:03:30,894 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:03:30,894 INFO L375 BasicCegarLoop]: trace histogram [98, 1, 1, 1] [2018-09-28 10:03:30,894 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:03:30,894 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:03:30,894 INFO L82 PathProgramCache]: Analyzing trace with hash -684368863, now seen corresponding path program 98 times [2018-09-28 10:03:30,894 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:03:30,894 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:03:30,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:30,895 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:03:30,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:30,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:03:34,677 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:34,677 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:03:34,677 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:03:34,684 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:03:34,739 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:03:34,740 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:03:34,742 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:03:34,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:34,781 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:03:34,781 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-09-28 10:03:34,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-28 10:03:34,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-28 10:03:34,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-09-28 10:03:34,782 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 101 states. [2018-09-28 10:03:35,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:03:35,008 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-09-28 10:03:35,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-09-28 10:03:35,009 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 101 [2018-09-28 10:03:35,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:03:35,010 INFO L225 Difference]: With dead ends: 105 [2018-09-28 10:03:35,010 INFO L226 Difference]: Without dead ends: 103 [2018-09-28 10:03:35,010 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-09-28 10:03:35,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-28 10:03:35,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-28 10:03:35,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-28 10:03:35,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-09-28 10:03:35,012 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101 [2018-09-28 10:03:35,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:03:35,013 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-09-28 10:03:35,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-28 10:03:35,013 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-09-28 10:03:35,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-28 10:03:35,013 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:03:35,013 INFO L375 BasicCegarLoop]: trace histogram [99, 1, 1, 1] [2018-09-28 10:03:35,014 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:03:35,014 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:03:35,014 INFO L82 PathProgramCache]: Analyzing trace with hash 259399752, now seen corresponding path program 99 times [2018-09-28 10:03:35,014 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:03:35,014 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:03:35,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:35,015 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:03:35,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:35,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:03:38,888 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:38,888 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:03:38,888 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:03:38,896 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:03:38,984 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2018-09-28 10:03:38,984 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:03:38,987 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:03:39,005 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:39,024 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:03:39,025 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-09-28 10:03:39,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-28 10:03:39,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-28 10:03:39,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-09-28 10:03:39,026 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 102 states. [2018-09-28 10:03:39,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:03:39,312 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2018-09-28 10:03:39,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-09-28 10:03:39,313 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 102 [2018-09-28 10:03:39,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:03:39,314 INFO L225 Difference]: With dead ends: 106 [2018-09-28 10:03:39,314 INFO L226 Difference]: Without dead ends: 104 [2018-09-28 10:03:39,315 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-09-28 10:03:39,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-09-28 10:03:39,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-09-28 10:03:39,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-09-28 10:03:39,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-09-28 10:03:39,319 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102 [2018-09-28 10:03:39,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:03:39,319 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-09-28 10:03:39,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-28 10:03:39,319 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-09-28 10:03:39,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-09-28 10:03:39,319 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:03:39,319 INFO L375 BasicCegarLoop]: trace histogram [100, 1, 1, 1] [2018-09-28 10:03:39,320 INFO L423 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:03:39,320 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:03:39,320 INFO L82 PathProgramCache]: Analyzing trace with hash -548544255, now seen corresponding path program 100 times [2018-09-28 10:03:39,320 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:03:39,320 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:03:39,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:39,321 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:03:39,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:39,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:03:43,213 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:43,213 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:03:43,213 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:03:43,221 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:03:43,274 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:03:43,274 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:03:43,277 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:03:43,294 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:43,315 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:03:43,315 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-09-28 10:03:43,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-09-28 10:03:43,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-09-28 10:03:43,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-09-28 10:03:43,317 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 103 states. [2018-09-28 10:03:43,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:03:43,538 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-09-28 10:03:43,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-28 10:03:43,538 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 103 [2018-09-28 10:03:43,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:03:43,539 INFO L225 Difference]: With dead ends: 107 [2018-09-28 10:03:43,540 INFO L226 Difference]: Without dead ends: 105 [2018-09-28 10:03:43,540 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 [2018-09-28 10:03:43,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-09-28 10:03:43,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-09-28 10:03:43,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-28 10:03:43,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-09-28 10:03:43,544 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 103 [2018-09-28 10:03:43,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:03:43,544 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-09-28 10:03:43,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-09-28 10:03:43,544 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-09-28 10:03:43,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-28 10:03:43,545 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:03:43,545 INFO L375 BasicCegarLoop]: trace histogram [101, 1, 1, 1] [2018-09-28 10:03:43,545 INFO L423 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:03:43,545 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:03:43,545 INFO L82 PathProgramCache]: Analyzing trace with hash 174995304, now seen corresponding path program 101 times [2018-09-28 10:03:43,545 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:03:43,546 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:03:43,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:43,546 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:03:43,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:43,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:03:47,655 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:47,656 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:03:47,656 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:03:47,664 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:03:47,775 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2018-09-28 10:03:47,775 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:03:47,779 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:03:47,798 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:47,819 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:03:47,820 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-09-28 10:03:47,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-28 10:03:47,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-28 10:03:47,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-09-28 10:03:47,821 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 104 states. [2018-09-28 10:03:48,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:03:48,101 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2018-09-28 10:03:48,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-09-28 10:03:48,101 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 104 [2018-09-28 10:03:48,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:03:48,102 INFO L225 Difference]: With dead ends: 108 [2018-09-28 10:03:48,103 INFO L226 Difference]: Without dead ends: 106 [2018-09-28 10:03:48,103 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-09-28 10:03:48,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-09-28 10:03:48,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-09-28 10:03:48,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-09-28 10:03:48,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-09-28 10:03:48,106 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 104 [2018-09-28 10:03:48,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:03:48,107 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-09-28 10:03:48,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-28 10:03:48,107 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-09-28 10:03:48,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-09-28 10:03:48,107 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:03:48,108 INFO L375 BasicCegarLoop]: trace histogram [102, 1, 1, 1] [2018-09-28 10:03:48,108 INFO L423 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:03:48,108 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:03:48,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1129885153, now seen corresponding path program 102 times [2018-09-28 10:03:48,108 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:03:48,108 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:03:48,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:48,109 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:03:48,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:48,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:03:52,189 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:52,190 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:03:52,190 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:03:52,200 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:03:52,289 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2018-09-28 10:03:52,290 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:03:52,293 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:03:52,311 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:52,332 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:03:52,333 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-09-28 10:03:52,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-09-28 10:03:52,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-09-28 10:03:52,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-09-28 10:03:52,334 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 105 states. [2018-09-28 10:03:52,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:03:52,637 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-09-28 10:03:52,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-09-28 10:03:52,638 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 105 [2018-09-28 10:03:52,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:03:52,639 INFO L225 Difference]: With dead ends: 109 [2018-09-28 10:03:52,639 INFO L226 Difference]: Without dead ends: 107 [2018-09-28 10:03:52,640 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-09-28 10:03:52,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-28 10:03:52,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-09-28 10:03:52,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-28 10:03:52,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-09-28 10:03:52,643 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 105 [2018-09-28 10:03:52,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:03:52,643 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-09-28 10:03:52,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-09-28 10:03:52,644 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-09-28 10:03:52,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-28 10:03:52,644 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:03:52,644 INFO L375 BasicCegarLoop]: trace histogram [103, 1, 1, 1] [2018-09-28 10:03:52,645 INFO L423 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:03:52,645 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:03:52,645 INFO L82 PathProgramCache]: Analyzing trace with hash 666699400, now seen corresponding path program 103 times [2018-09-28 10:03:52,645 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:03:52,645 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:03:52,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:52,646 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:03:52,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:52,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:03:56,491 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:56,492 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:03:56,492 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:03:56,500 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:03:56,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:03:56,558 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:03:56,584 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:03:56,604 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:03:56,605 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-09-28 10:03:56,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-28 10:03:56,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-28 10:03:56,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-09-28 10:03:56,606 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 106 states. [2018-09-28 10:03:56,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:03:56,976 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2018-09-28 10:03:56,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-09-28 10:03:56,977 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 106 [2018-09-28 10:03:56,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:03:56,977 INFO L225 Difference]: With dead ends: 110 [2018-09-28 10:03:56,977 INFO L226 Difference]: Without dead ends: 108 [2018-09-28 10:03:56,978 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-09-28 10:03:56,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-09-28 10:03:56,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-09-28 10:03:56,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-09-28 10:03:56,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-09-28 10:03:56,982 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 106 [2018-09-28 10:03:56,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:03:56,982 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-09-28 10:03:56,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-28 10:03:56,982 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-09-28 10:03:56,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-09-28 10:03:56,983 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:03:56,983 INFO L375 BasicCegarLoop]: trace histogram [104, 1, 1, 1] [2018-09-28 10:03:56,983 INFO L423 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:03:56,983 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:03:56,983 INFO L82 PathProgramCache]: Analyzing trace with hash -807157055, now seen corresponding path program 104 times [2018-09-28 10:03:56,983 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:03:56,984 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:03:56,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:56,984 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:03:56,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:03:56,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:04:00,938 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:00,939 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:04:00,939 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:04:00,945 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:04:01,001 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:04:01,002 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:04:01,005 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:04:01,028 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:01,053 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:04:01,053 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106 [2018-09-28 10:04:01,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-09-28 10:04:01,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-09-28 10:04:01,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-09-28 10:04:01,054 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 107 states. [2018-09-28 10:04:01,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:04:01,250 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-09-28 10:04:01,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-09-28 10:04:01,251 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 107 [2018-09-28 10:04:01,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:04:01,251 INFO L225 Difference]: With dead ends: 111 [2018-09-28 10:04:01,251 INFO L226 Difference]: Without dead ends: 109 [2018-09-28 10:04:01,252 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-09-28 10:04:01,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-28 10:04:01,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-28 10:04:01,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-28 10:04:01,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-09-28 10:04:01,255 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 107 [2018-09-28 10:04:01,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:04:01,255 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-09-28 10:04:01,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-09-28 10:04:01,255 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-09-28 10:04:01,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-28 10:04:01,255 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:04:01,255 INFO L375 BasicCegarLoop]: trace histogram [105, 1, 1, 1] [2018-09-28 10:04:01,256 INFO L423 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:04:01,256 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:04:01,256 INFO L82 PathProgramCache]: Analyzing trace with hash 747933096, now seen corresponding path program 105 times [2018-09-28 10:04:01,256 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:04:01,256 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:04:01,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:01,257 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:04:01,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:01,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:04:05,340 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:05,340 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:04:05,340 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:04:05,348 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:04:05,451 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2018-09-28 10:04:05,451 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:04:05,454 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:04:05,474 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:05,494 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:04:05,494 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-09-28 10:04:05,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-28 10:04:05,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-28 10:04:05,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-09-28 10:04:05,495 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 108 states. [2018-09-28 10:04:05,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:04:05,853 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2018-09-28 10:04:05,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-09-28 10:04:05,853 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 108 [2018-09-28 10:04:05,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:04:05,854 INFO L225 Difference]: With dead ends: 112 [2018-09-28 10:04:05,854 INFO L226 Difference]: Without dead ends: 110 [2018-09-28 10:04:05,855 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-09-28 10:04:05,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-09-28 10:04:05,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-09-28 10:04:05,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-09-28 10:04:05,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-09-28 10:04:05,858 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 108 [2018-09-28 10:04:05,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:04:05,858 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-09-28 10:04:05,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-28 10:04:05,858 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-09-28 10:04:05,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-09-28 10:04:05,859 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:04:05,859 INFO L375 BasicCegarLoop]: trace histogram [106, 1, 1, 1] [2018-09-28 10:04:05,859 INFO L423 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:04:05,859 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:04:05,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1711087521, now seen corresponding path program 106 times [2018-09-28 10:04:05,859 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:04:05,860 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:04:05,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:05,860 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:04:05,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:05,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:04:10,167 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:10,168 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:04:10,168 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:04:10,175 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:04:10,233 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:04:10,233 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:04:10,236 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:04:10,256 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:10,277 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:04:10,277 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 108 [2018-09-28 10:04:10,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-09-28 10:04:10,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-09-28 10:04:10,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-09-28 10:04:10,278 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 109 states. [2018-09-28 10:04:10,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:04:10,651 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-09-28 10:04:10,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-09-28 10:04:10,651 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 109 [2018-09-28 10:04:10,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:04:10,652 INFO L225 Difference]: With dead ends: 113 [2018-09-28 10:04:10,652 INFO L226 Difference]: Without dead ends: 111 [2018-09-28 10:04:10,653 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-09-28 10:04:10,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-28 10:04:10,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-09-28 10:04:10,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-28 10:04:10,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-09-28 10:04:10,656 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 109 [2018-09-28 10:04:10,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:04:10,656 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-09-28 10:04:10,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-09-28 10:04:10,656 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-09-28 10:04:10,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-28 10:04:10,657 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:04:10,657 INFO L375 BasicCegarLoop]: trace histogram [107, 1, 1, 1] [2018-09-28 10:04:10,657 INFO L423 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:04:10,657 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:04:10,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1504103624, now seen corresponding path program 107 times [2018-09-28 10:04:10,657 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:04:10,657 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:04:10,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:10,658 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:04:10,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:10,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:04:15,067 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:15,068 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:04:15,068 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:04:15,075 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:04:15,182 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2018-09-28 10:04:15,183 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:04:15,186 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:04:15,207 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:15,228 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:04:15,228 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109] total 109 [2018-09-28 10:04:15,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-09-28 10:04:15,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-09-28 10:04:15,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-09-28 10:04:15,229 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 110 states. [2018-09-28 10:04:15,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:04:15,597 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2018-09-28 10:04:15,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-09-28 10:04:15,598 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 110 [2018-09-28 10:04:15,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:04:15,598 INFO L225 Difference]: With dead ends: 114 [2018-09-28 10:04:15,598 INFO L226 Difference]: Without dead ends: 112 [2018-09-28 10:04:15,599 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-09-28 10:04:15,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-09-28 10:04:15,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-09-28 10:04:15,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-09-28 10:04:15,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-09-28 10:04:15,601 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 110 [2018-09-28 10:04:15,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:04:15,601 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-09-28 10:04:15,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-09-28 10:04:15,601 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-09-28 10:04:15,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-09-28 10:04:15,602 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:04:15,602 INFO L375 BasicCegarLoop]: trace histogram [108, 1, 1, 1] [2018-09-28 10:04:15,602 INFO L423 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:04:15,602 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:04:15,603 INFO L82 PathProgramCache]: Analyzing trace with hash -617429887, now seen corresponding path program 108 times [2018-09-28 10:04:15,603 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:04:15,603 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:04:15,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:15,603 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:04:15,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:15,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:04:20,074 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 0 proven. 5886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:20,074 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:04:20,074 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:04:20,081 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:04:20,179 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-09-28 10:04:20,179 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:04:20,183 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:04:20,204 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 0 proven. 5886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:20,224 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:04:20,224 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 110] total 110 [2018-09-28 10:04:20,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 111 states [2018-09-28 10:04:20,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2018-09-28 10:04:20,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-09-28 10:04:20,226 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 111 states. [2018-09-28 10:04:20,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:04:20,556 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-09-28 10:04:20,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-09-28 10:04:20,556 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 111 [2018-09-28 10:04:20,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:04:20,557 INFO L225 Difference]: With dead ends: 115 [2018-09-28 10:04:20,557 INFO L226 Difference]: Without dead ends: 113 [2018-09-28 10:04:20,558 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-09-28 10:04:20,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-28 10:04:20,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-09-28 10:04:20,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-28 10:04:20,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-09-28 10:04:20,560 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 111 [2018-09-28 10:04:20,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:04:20,560 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-09-28 10:04:20,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has 111 states. [2018-09-28 10:04:20,561 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-09-28 10:04:20,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-28 10:04:20,562 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:04:20,562 INFO L375 BasicCegarLoop]: trace histogram [109, 1, 1, 1] [2018-09-28 10:04:20,562 INFO L423 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:04:20,562 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:04:20,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1960459288, now seen corresponding path program 109 times [2018-09-28 10:04:20,563 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:04:20,563 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:04:20,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:20,564 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:04:20,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:20,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:04:25,171 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:25,171 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:04:25,171 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:04:25,190 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:04:25,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:04:25,252 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:04:25,274 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:04:25,294 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:04:25,294 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 111] total 111 [2018-09-28 10:04:25,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-09-28 10:04:25,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-09-28 10:04:25,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2018-09-28 10:04:25,295 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 112 states. [2018-09-28 10:04:25,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:04:25,617 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2018-09-28 10:04:25,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-09-28 10:04:25,618 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 112 [2018-09-28 10:04:25,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:04:25,618 INFO L225 Difference]: With dead ends: 116 [2018-09-28 10:04:25,619 INFO L226 Difference]: Without dead ends: 114 [2018-09-28 10:04:25,620 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2018-09-28 10:04:25,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-09-28 10:04:25,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-09-28 10:04:25,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-09-28 10:04:25,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2018-09-28 10:04:25,623 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 112 [2018-09-28 10:04:25,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:04:25,623 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2018-09-28 10:04:25,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-09-28 10:04:25,623 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2018-09-28 10:04:25,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-09-28 10:04:25,624 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:04:25,624 INFO L375 BasicCegarLoop]: trace histogram [110, 1, 1, 1] [2018-09-28 10:04:25,624 INFO L423 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:04:25,624 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:04:25,624 INFO L82 PathProgramCache]: Analyzing trace with hash -644697759, now seen corresponding path program 110 times [2018-09-28 10:04:25,624 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:04:25,624 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:04:25,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:25,625 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:04:25,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:04:25,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-09-28 10:04:27,763 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-28 10:04:27,768 WARN L206 ceAbstractionStarter]: Timeout [2018-09-28 10:04:27,769 INFO L202 PluginConnector]: Adding new model overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.09 10:04:27 BoogieIcfgContainer [2018-09-28 10:04:27,769 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-28 10:04:27,770 INFO L168 Benchmark]: Toolchain (without parser) took 232875.39 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -124.8 MB). Free memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: 201.1 MB). Peak memory consumption was 76.4 MB. Max. memory is 7.1 GB. [2018-09-28 10:04:27,772 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.26 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. [2018-09-28 10:04:27,772 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.99 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. [2018-09-28 10:04:27,772 INFO L168 Benchmark]: Boogie Preprocessor took 23.10 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. [2018-09-28 10:04:27,772 INFO L168 Benchmark]: RCFGBuilder took 311.99 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. [2018-09-28 10:04:27,773 INFO L168 Benchmark]: TraceAbstraction took 232491.03 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -124.8 MB). Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 180.0 MB). Peak memory consumption was 55.2 MB. Max. memory is 7.1 GB. [2018-09-28 10:04:27,774 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 0.26 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 42.99 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 23.10 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 311.99 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 232491.03 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -124.8 MB). Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 180.0 MB). Peak memory consumption was 55.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 31]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 31). Cancelled while BasicCegarLoop was analyzing trace of length 114 with TraceHistMax 110, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while NestedInterpolantsBuilder was constructing predicates for 112 interpolants. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 232.4s OverallTime, 111 OverallIterations, 110 TraceHistogramMax, 22.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 330 SDtfs, 0 SDslu, 4759 SDs, 0 SdLazy, 10974 SolverSat, 163 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 15.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12428 GetRequests, 6323 SyntacticMatches, 0 SemanticMatches, 6105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 192.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=114occurred in iteration=110, 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, 110 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 5.9s SatisfiabilityAnalysisTime, 196.6s InterpolantComputationTime, 12647 NumberOfCodeBlocks, 12647 NumberOfCodeBlocksAsserted, 1776 NumberOfCheckSat, 12428 ConstructedInterpolants, 0 QuantifiedInterpolants, 2747462 SizeOfPredicates, 109 NumberOfNonLiveVariables, 25942 ConjunctsInSsa, 6213 ConjunctsInUnsatCore, 219 InterpolantComputations, 1 PerfectInterpolantSequences, 0/443630 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/overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-28_10-04-27-783.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-28_10-04-27-783.csv Completed graceful shutdown