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/count_by_2.i_3.bplTransformedIcfg_BEv2_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-4eac566 [2018-09-23 19:32:03,963 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-23 19:32:03,965 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-23 19:32:03,982 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-23 19:32:03,983 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-23 19:32:03,984 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-23 19:32:03,987 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-23 19:32:03,990 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-23 19:32:03,992 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-23 19:32:03,994 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-23 19:32:03,995 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-23 19:32:04,036 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 [2018-09-23 19:32:04,061 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-23 19:32:04,061 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-23 19:32:04,062 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-23 19:32:04,062 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-23 19:32:04,066 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-23 19:32:04,066 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-23 19:32:04,066 INFO L133 SettingsManager]: * Use SBE=true [2018-09-23 19:32:04,066 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-23 19:32:04,067 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-23 19:32:04,067 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-23 19:32:04,068 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-23 19:32:04,068 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-23 19:32:04,068 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-23 19:32:04,068 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-23 19:32:04,068 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-23 19:32:04,068 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-23 19:32:04,069 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-23 19:32:04,069 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-23 19:32:04,069 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-23 19:32:04,069 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-23 19:32:04,071 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-23 19:32:04,071 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-23 19:32:04,071 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 19:32:04,071 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-23 19:32:04,071 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-23 19:32:04,072 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-23 19:32:04,072 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-23 19:32:04,072 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-23 19:32:04,072 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-23 19:32:04,072 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-23 19:32:04,122 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-23 19:32:04,138 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-23 19:32:04,145 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-23 19:32:04,147 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-23 19:32:04,148 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-23 19:32:04,148 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/count_by_2.i_3.bplTransformedIcfg_BEv2_3.bpl [2018-09-23 19:32:04,149 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/count_by_2.i_3.bplTransformedIcfg_BEv2_3.bpl' [2018-09-23 19:32:04,209 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-23 19:32:04,213 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-23 19:32:04,214 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-23 19:32:04,214 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-23 19:32:04,214 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-23 19:32:04,236 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "count_by_2.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:32:04" (1/1) ... [2018-09-23 19:32:04,250 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "count_by_2.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:32:04" (1/1) ... [2018-09-23 19:32:04,257 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-23 19:32:04,258 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-23 19:32:04,258 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-23 19:32:04,259 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-23 19:32:04,271 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "count_by_2.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:32:04" (1/1) ... [2018-09-23 19:32:04,271 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "count_by_2.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:32:04" (1/1) ... [2018-09-23 19:32:04,272 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "count_by_2.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:32:04" (1/1) ... [2018-09-23 19:32:04,272 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "count_by_2.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:32:04" (1/1) ... [2018-09-23 19:32:04,277 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "count_by_2.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:32:04" (1/1) ... [2018-09-23 19:32:04,278 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "count_by_2.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:32:04" (1/1) ... [2018-09-23 19:32:04,279 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "count_by_2.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:32:04" (1/1) ... [2018-09-23 19:32:04,281 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-23 19:32:04,282 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-23 19:32:04,282 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-23 19:32:04,282 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-23 19:32:04,284 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "count_by_2.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:32:04" (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 [2018-09-23 19:32:04,366 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-09-23 19:32:04,366 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-23 19:32:04,366 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-23 19:32:04,527 INFO L354 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-23 19:32:04,528 INFO L202 PluginConnector]: Adding new model count_by_2.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 07:32:04 BoogieIcfgContainer [2018-09-23 19:32:04,528 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-23 19:32:04,529 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-23 19:32:04,529 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-23 19:32:04,533 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-23 19:32:04,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "count_by_2.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:32:04" (1/2) ... [2018-09-23 19:32:04,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c661b78 and model type count_by_2.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.09 07:32:04, skipping insertion in model container [2018-09-23 19:32:04,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "count_by_2.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 07:32:04" (2/2) ... [2018-09-23 19:32:04,536 INFO L112 eAbstractionObserver]: Analyzing ICFG count_by_2.i_3.bplTransformedIcfg_BEv2_3.bpl [2018-09-23 19:32:04,546 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-23 19:32:04,554 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-23 19:32:04,607 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-23 19:32:04,608 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-23 19:32:04,609 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-23 19:32:04,609 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-23 19:32:04,609 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-23 19:32:04,609 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-23 19:32:04,610 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-23 19:32:04,610 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-23 19:32:04,610 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-23 19:32:04,626 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-09-23 19:32:04,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-23 19:32:04,633 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:04,634 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-23 19:32:04,635 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:04,641 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:04,642 INFO L82 PathProgramCache]: Analyzing trace with hash 30017, now seen corresponding path program 1 times [2018-09-23 19:32:04,644 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:04,644 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:04,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:04,701 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:04,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:04,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:04,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:04,790 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 19:32:04,790 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-23 19:32:04,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-23 19:32:04,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-23 19:32:04,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 19:32:04,811 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-09-23 19:32:04,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:04,849 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2018-09-23 19:32:04,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-23 19:32:04,852 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-23 19:32:04,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:04,863 INFO L225 Difference]: With dead ends: 9 [2018-09-23 19:32:04,864 INFO L226 Difference]: Without dead ends: 5 [2018-09-23 19:32:04,867 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 [2018-09-23 19:32:04,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-09-23 19:32:04,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-09-23 19:32:04,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-09-23 19:32:04,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-09-23 19:32:04,904 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-09-23 19:32:04,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:04,905 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-09-23 19:32:04,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-23 19:32:04,905 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-09-23 19:32:04,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-23 19:32:04,906 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:04,906 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-23 19:32:04,906 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:04,907 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:04,907 INFO L82 PathProgramCache]: Analyzing trace with hash 928552, now seen corresponding path program 1 times [2018-09-23 19:32:04,907 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:04,907 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:04,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:04,908 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:04,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:04,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:05,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:05,009 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:05,009 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:32:05,029 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:05,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:05,078 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:05,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:05,122 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:05,122 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-23 19:32:05,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-23 19:32:05,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-23 19:32:05,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-23 19:32:05,123 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 4 states. [2018-09-23 19:32:05,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:05,172 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-09-23 19:32:05,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-23 19:32:05,173 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-09-23 19:32:05,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:05,174 INFO L225 Difference]: With dead ends: 8 [2018-09-23 19:32:05,174 INFO L226 Difference]: Without dead ends: 6 [2018-09-23 19:32:05,175 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 [2018-09-23 19:32:05,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-23 19:32:05,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-23 19:32:05,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-23 19:32:05,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-23 19:32:05,178 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-09-23 19:32:05,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:05,178 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-23 19:32:05,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-23 19:32:05,179 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-23 19:32:05,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-23 19:32:05,179 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:05,179 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-09-23 19:32:05,180 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:05,180 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:05,180 INFO L82 PathProgramCache]: Analyzing trace with hash 28783137, now seen corresponding path program 2 times [2018-09-23 19:32:05,180 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:05,180 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:05,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:05,181 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:05,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:05,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:05,285 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:05,286 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:05,286 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:32:05,295 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:32:05,308 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:32:05,308 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:05,309 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:05,315 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:05,337 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:05,337 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-23 19:32:05,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-23 19:32:05,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-23 19:32:05,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-23 19:32:05,338 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 5 states. [2018-09-23 19:32:05,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:05,362 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-23 19:32:05,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-23 19:32:05,363 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2018-09-23 19:32:05,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:05,364 INFO L225 Difference]: With dead ends: 9 [2018-09-23 19:32:05,364 INFO L226 Difference]: Without dead ends: 7 [2018-09-23 19:32:05,365 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-23 19:32:05,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-23 19:32:05,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-23 19:32:05,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-23 19:32:05,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-23 19:32:05,368 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-09-23 19:32:05,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:05,368 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-23 19:32:05,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-23 19:32:05,369 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-23 19:32:05,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-23 19:32:05,369 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:05,369 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2018-09-23 19:32:05,370 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:05,370 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:05,370 INFO L82 PathProgramCache]: Analyzing trace with hash 892275272, now seen corresponding path program 3 times [2018-09-23 19:32:05,370 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:05,371 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:05,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:05,372 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:32:05,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:05,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:05,479 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:05,480 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:05,480 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 [2018-09-23 19:32:05,493 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:32:05,502 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-23 19:32:05,503 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:05,504 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:05,510 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:05,531 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:05,532 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-23 19:32:05,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-23 19:32:05,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-23 19:32:05,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-23 19:32:05,533 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2018-09-23 19:32:05,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:05,599 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-09-23 19:32:05,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-23 19:32:05,600 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2018-09-23 19:32:05,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:05,601 INFO L225 Difference]: With dead ends: 10 [2018-09-23 19:32:05,601 INFO L226 Difference]: Without dead ends: 8 [2018-09-23 19:32:05,602 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 [2018-09-23 19:32:05,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-23 19:32:05,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-23 19:32:05,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-23 19:32:05,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-09-23 19:32:05,605 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-09-23 19:32:05,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:05,605 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-09-23 19:32:05,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-23 19:32:05,605 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-09-23 19:32:05,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-23 19:32:05,606 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:05,606 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1, 1] [2018-09-23 19:32:05,606 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:05,607 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:05,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1890727681, now seen corresponding path program 4 times [2018-09-23 19:32:05,607 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:05,607 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:05,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:05,608 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:32:05,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:05,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:05,845 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:05,846 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:05,846 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:32:05,860 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:32:05,892 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:32:05,893 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:05,894 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:05,901 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:05,932 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:05,932 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-23 19:32:05,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-23 19:32:05,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-23 19:32:05,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-23 19:32:05,933 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 7 states. [2018-09-23 19:32:05,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:05,997 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-23 19:32:05,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-23 19:32:05,998 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-09-23 19:32:05,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:05,999 INFO L225 Difference]: With dead ends: 11 [2018-09-23 19:32:05,999 INFO L226 Difference]: Without dead ends: 9 [2018-09-23 19:32:05,999 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 [2018-09-23 19:32:06,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-23 19:32:06,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-23 19:32:06,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-23 19:32:06,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-23 19:32:06,004 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-09-23 19:32:06,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:06,005 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-23 19:32:06,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-23 19:32:06,006 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-23 19:32:06,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-23 19:32:06,006 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:06,007 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1] [2018-09-23 19:32:06,007 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:06,008 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:06,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1516986008, now seen corresponding path program 5 times [2018-09-23 19:32:06,008 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:06,008 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:06,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:06,010 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:32:06,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:06,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:06,173 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:06,174 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:06,174 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 [2018-09-23 19:32:06,183 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:32:06,240 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-23 19:32:06,240 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:06,242 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:06,252 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:06,275 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:06,275 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-23 19:32:06,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 19:32:06,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 19:32:06,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:32:06,276 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 8 states. [2018-09-23 19:32:06,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:06,327 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-09-23 19:32:06,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 19:32:06,328 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2018-09-23 19:32:06,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:06,329 INFO L225 Difference]: With dead ends: 12 [2018-09-23 19:32:06,329 INFO L226 Difference]: Without dead ends: 10 [2018-09-23 19:32:06,330 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:32:06,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-23 19:32:06,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-23 19:32:06,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-23 19:32:06,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-23 19:32:06,333 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-09-23 19:32:06,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:06,333 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-23 19:32:06,333 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 19:32:06,333 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-23 19:32:06,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-23 19:32:06,334 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:06,334 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1, 1] [2018-09-23 19:32:06,334 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:06,335 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:06,335 INFO L82 PathProgramCache]: Analyzing trace with hash 218072033, now seen corresponding path program 6 times [2018-09-23 19:32:06,335 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:06,335 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:06,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:06,336 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:32:06,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:06,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:06,557 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:06,557 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:06,558 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:32:06,569 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:32:06,580 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-23 19:32:06,581 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:06,582 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:06,592 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:06,613 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:06,613 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:32:06,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:32:06,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:32:06,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:32:06,614 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 9 states. [2018-09-23 19:32:06,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:06,669 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-23 19:32:06,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:32:06,670 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2018-09-23 19:32:06,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:06,670 INFO L225 Difference]: With dead ends: 13 [2018-09-23 19:32:06,670 INFO L226 Difference]: Without dead ends: 11 [2018-09-23 19:32:06,671 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:32:06,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-23 19:32:06,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-23 19:32:06,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-23 19:32:06,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-23 19:32:06,674 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-09-23 19:32:06,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:06,674 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-23 19:32:06,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:32:06,675 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-23 19:32:06,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-23 19:32:06,675 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:06,675 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1, 1] [2018-09-23 19:32:06,676 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:06,676 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:06,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1829703544, now seen corresponding path program 7 times [2018-09-23 19:32:06,676 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:06,676 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:06,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:06,677 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:32:06,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:06,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:06,802 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:06,802 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:06,802 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 [2018-09-23 19:32:06,815 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:06,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:06,837 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:06,844 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:06,874 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:06,874 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:32:06,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:32:06,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:32:06,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:32:06,875 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-09-23 19:32:06,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:06,933 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-09-23 19:32:06,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:32:06,934 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2018-09-23 19:32:06,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:06,935 INFO L225 Difference]: With dead ends: 14 [2018-09-23 19:32:06,935 INFO L226 Difference]: Without dead ends: 12 [2018-09-23 19:32:06,937 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 [2018-09-23 19:32:06,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-23 19:32:06,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-23 19:32:06,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-23 19:32:06,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-23 19:32:06,940 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-09-23 19:32:06,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:06,940 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-23 19:32:06,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:32:06,940 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-23 19:32:06,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-23 19:32:06,941 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:06,941 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1, 1] [2018-09-23 19:32:06,941 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:06,941 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:06,941 INFO L82 PathProgramCache]: Analyzing trace with hash -886236991, now seen corresponding path program 8 times [2018-09-23 19:32:06,941 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:06,942 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:06,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:06,942 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:06,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:06,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:07,379 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:07,379 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:07,379 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 [2018-09-23 19:32:07,389 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:32:07,398 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:32:07,399 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:07,401 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:07,409 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:07,434 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:07,434 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:32:07,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:32:07,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:32:07,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:32:07,436 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 11 states. [2018-09-23 19:32:07,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:07,473 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-23 19:32:07,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:32:07,479 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2018-09-23 19:32:07,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:07,480 INFO L225 Difference]: With dead ends: 15 [2018-09-23 19:32:07,480 INFO L226 Difference]: Without dead ends: 13 [2018-09-23 19:32:07,480 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:32:07,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-23 19:32:07,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-23 19:32:07,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-23 19:32:07,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-23 19:32:07,483 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-09-23 19:32:07,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:07,484 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-23 19:32:07,484 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:32:07,484 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-23 19:32:07,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-23 19:32:07,484 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:07,484 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1, 1] [2018-09-23 19:32:07,485 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:07,485 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:07,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1703544920, now seen corresponding path program 9 times [2018-09-23 19:32:07,485 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:07,485 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:07,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:07,486 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:32:07,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:07,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:07,647 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:07,649 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:07,649 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 [2018-09-23 19:32:07,661 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:32:07,707 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-23 19:32:07,708 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:07,709 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:07,721 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:07,751 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:07,751 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-23 19:32:07,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-23 19:32:07,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-23 19:32:07,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-23 19:32:07,753 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 12 states. [2018-09-23 19:32:07,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:07,805 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-09-23 19:32:07,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-23 19:32:07,806 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2018-09-23 19:32:07,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:07,806 INFO L225 Difference]: With dead ends: 16 [2018-09-23 19:32:07,807 INFO L226 Difference]: Without dead ends: 14 [2018-09-23 19:32:07,807 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 [2018-09-23 19:32:07,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-23 19:32:07,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-23 19:32:07,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-23 19:32:07,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-23 19:32:07,811 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-09-23 19:32:07,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:07,811 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-23 19:32:07,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-23 19:32:07,811 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-23 19:32:07,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-23 19:32:07,812 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:07,812 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1, 1] [2018-09-23 19:32:07,812 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:07,813 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:07,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1270286943, now seen corresponding path program 10 times [2018-09-23 19:32:07,813 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:07,813 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:07,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:07,814 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:32:07,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:07,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:07,999 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:07,999 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:07,999 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 [2018-09-23 19:32:08,008 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:32:08,035 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:32:08,035 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:08,037 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:08,050 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:08,073 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:08,074 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-23 19:32:08,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-23 19:32:08,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-23 19:32:08,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-23 19:32:08,075 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 13 states. [2018-09-23 19:32:08,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:08,131 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-23 19:32:08,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-23 19:32:08,131 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 13 [2018-09-23 19:32:08,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:08,132 INFO L225 Difference]: With dead ends: 17 [2018-09-23 19:32:08,132 INFO L226 Difference]: Without dead ends: 15 [2018-09-23 19:32:08,132 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-23 19:32:08,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-23 19:32:08,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-23 19:32:08,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-23 19:32:08,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-23 19:32:08,136 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-09-23 19:32:08,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:08,136 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-23 19:32:08,136 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-23 19:32:08,136 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-23 19:32:08,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-23 19:32:08,137 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:08,137 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1, 1] [2018-09-23 19:32:08,137 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:08,138 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:08,138 INFO L82 PathProgramCache]: Analyzing trace with hash -724191544, now seen corresponding path program 11 times [2018-09-23 19:32:08,138 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:08,138 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:08,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:08,139 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:32:08,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:08,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:08,389 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:08,390 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:08,390 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 [2018-09-23 19:32:08,401 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:32:08,433 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-23 19:32:08,433 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:08,434 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:08,444 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:08,466 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:08,467 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-23 19:32:08,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 19:32:08,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 19:32:08,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-23 19:32:08,468 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 14 states. [2018-09-23 19:32:08,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:08,522 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-09-23 19:32:08,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-23 19:32:08,522 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-09-23 19:32:08,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:08,523 INFO L225 Difference]: With dead ends: 18 [2018-09-23 19:32:08,524 INFO L226 Difference]: Without dead ends: 16 [2018-09-23 19:32:08,524 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 [2018-09-23 19:32:08,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-23 19:32:08,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-23 19:32:08,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-23 19:32:08,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-09-23 19:32:08,527 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-09-23 19:32:08,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:08,527 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-09-23 19:32:08,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 19:32:08,527 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-09-23 19:32:08,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:32:08,528 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:08,528 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1, 1] [2018-09-23 19:32:08,528 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:08,529 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:08,529 INFO L82 PathProgramCache]: Analyzing trace with hash -975103359, now seen corresponding path program 12 times [2018-09-23 19:32:08,529 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:08,529 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:08,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:08,530 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:32:08,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:08,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:08,705 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:08,706 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:08,706 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 [2018-09-23 19:32:08,713 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:32:08,727 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-23 19:32:08,727 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:08,728 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:08,737 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:08,765 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:08,766 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-23 19:32:08,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-23 19:32:08,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-23 19:32:08,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-23 19:32:08,767 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 15 states. [2018-09-23 19:32:08,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:08,827 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-23 19:32:08,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-23 19:32:08,830 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-09-23 19:32:08,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:08,830 INFO L225 Difference]: With dead ends: 19 [2018-09-23 19:32:08,830 INFO L226 Difference]: Without dead ends: 17 [2018-09-23 19:32:08,831 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-23 19:32:08,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-23 19:32:08,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-23 19:32:08,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-23 19:32:08,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-23 19:32:08,834 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-09-23 19:32:08,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:08,834 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-23 19:32:08,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-23 19:32:08,835 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-23 19:32:08,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-23 19:32:08,835 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:08,835 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1, 1] [2018-09-23 19:32:08,835 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:08,836 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:08,836 INFO L82 PathProgramCache]: Analyzing trace with hash -163435032, now seen corresponding path program 13 times [2018-09-23 19:32:08,836 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:08,836 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:08,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:08,837 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:32:08,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:08,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:09,081 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:09,082 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:09,082 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 [2018-09-23 19:32:09,091 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:09,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:09,115 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:09,124 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:09,153 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:09,153 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-23 19:32:09,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-23 19:32:09,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-23 19:32:09,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-23 19:32:09,154 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 16 states. [2018-09-23 19:32:09,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:09,413 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-09-23 19:32:09,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-23 19:32:09,414 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2018-09-23 19:32:09,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:09,415 INFO L225 Difference]: With dead ends: 20 [2018-09-23 19:32:09,415 INFO L226 Difference]: Without dead ends: 18 [2018-09-23 19:32:09,415 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 [2018-09-23 19:32:09,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-23 19:32:09,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-23 19:32:09,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-23 19:32:09,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-09-23 19:32:09,421 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-09-23 19:32:09,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:09,422 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-09-23 19:32:09,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-23 19:32:09,422 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-09-23 19:32:09,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:32:09,423 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:09,423 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1, 1] [2018-09-23 19:32:09,423 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:09,423 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:09,423 INFO L82 PathProgramCache]: Analyzing trace with hash -771520671, now seen corresponding path program 14 times [2018-09-23 19:32:09,424 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:09,424 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:09,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:09,425 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:09,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:09,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:09,680 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:09,680 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:09,681 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:32:09,690 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:32:09,698 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:32:09,698 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:09,700 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:09,710 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:09,731 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:09,731 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-23 19:32:09,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-23 19:32:09,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-23 19:32:09,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-23 19:32:09,732 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 17 states. [2018-09-23 19:32:10,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:10,064 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-23 19:32:10,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-23 19:32:10,065 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2018-09-23 19:32:10,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:10,065 INFO L225 Difference]: With dead ends: 21 [2018-09-23 19:32:10,066 INFO L226 Difference]: Without dead ends: 19 [2018-09-23 19:32:10,066 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 [2018-09-23 19:32:10,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-23 19:32:10,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-23 19:32:10,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-23 19:32:10,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-23 19:32:10,070 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-09-23 19:32:10,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:10,070 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-23 19:32:10,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-23 19:32:10,070 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-23 19:32:10,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-23 19:32:10,071 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:10,071 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1, 1] [2018-09-23 19:32:10,071 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:10,072 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:10,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1852661000, now seen corresponding path program 15 times [2018-09-23 19:32:10,072 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:10,072 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:10,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:10,073 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:32:10,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:10,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:10,333 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:10,333 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:10,333 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 [2018-09-23 19:32:10,342 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:32:10,362 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-23 19:32:10,363 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:10,365 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:10,375 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:10,400 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:10,400 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-23 19:32:10,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-23 19:32:10,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-23 19:32:10,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-23 19:32:10,401 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 18 states. [2018-09-23 19:32:10,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:10,511 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-09-23 19:32:10,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-23 19:32:10,512 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-09-23 19:32:10,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:10,513 INFO L225 Difference]: With dead ends: 22 [2018-09-23 19:32:10,513 INFO L226 Difference]: Without dead ends: 20 [2018-09-23 19:32:10,514 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 [2018-09-23 19:32:10,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-23 19:32:10,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-23 19:32:10,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-23 19:32:10,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-09-23 19:32:10,518 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-09-23 19:32:10,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:10,518 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-09-23 19:32:10,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-23 19:32:10,518 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-09-23 19:32:10,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:32:10,519 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:10,519 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1, 1] [2018-09-23 19:32:10,519 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:10,519 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:10,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1597914177, now seen corresponding path program 16 times [2018-09-23 19:32:10,520 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:10,520 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:10,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:10,521 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:32:10,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:10,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:10,743 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:10,744 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:10,744 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 [2018-09-23 19:32:10,752 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:32:10,763 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:32:10,764 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:10,765 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:10,775 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:10,798 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:10,799 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-23 19:32:10,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-23 19:32:10,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-23 19:32:10,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-23 19:32:10,800 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 19 states. [2018-09-23 19:32:10,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:10,869 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-23 19:32:10,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-23 19:32:10,871 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2018-09-23 19:32:10,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:10,872 INFO L225 Difference]: With dead ends: 23 [2018-09-23 19:32:10,872 INFO L226 Difference]: Without dead ends: 21 [2018-09-23 19:32:10,872 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-23 19:32:10,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-23 19:32:10,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-23 19:32:10,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-23 19:32:10,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-23 19:32:10,875 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-09-23 19:32:10,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:10,876 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-23 19:32:10,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-23 19:32:10,876 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-23 19:32:10,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-23 19:32:10,876 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:10,876 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1, 1] [2018-09-23 19:32:10,877 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:10,877 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:10,877 INFO L82 PathProgramCache]: Analyzing trace with hash -2004270040, now seen corresponding path program 17 times [2018-09-23 19:32:10,877 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:10,877 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:10,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:10,878 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:32:10,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:10,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:11,495 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:11,495 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:11,495 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:32:11,504 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:32:11,519 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-23 19:32:11,519 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:11,522 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:11,534 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:11,566 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:11,567 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-23 19:32:11,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-23 19:32:11,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-23 19:32:11,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-23 19:32:11,568 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 20 states. [2018-09-23 19:32:11,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:11,701 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-09-23 19:32:11,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-23 19:32:11,702 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2018-09-23 19:32:11,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:11,703 INFO L225 Difference]: With dead ends: 24 [2018-09-23 19:32:11,703 INFO L226 Difference]: Without dead ends: 22 [2018-09-23 19:32:11,704 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-23 19:32:11,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-23 19:32:11,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-23 19:32:11,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-23 19:32:11,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-09-23 19:32:11,708 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-09-23 19:32:11,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:11,708 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-09-23 19:32:11,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-23 19:32:11,708 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-09-23 19:32:11,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-23 19:32:11,709 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:11,709 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1, 1] [2018-09-23 19:32:11,709 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:11,709 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:11,710 INFO L82 PathProgramCache]: Analyzing trace with hash -2002831071, now seen corresponding path program 18 times [2018-09-23 19:32:11,710 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:11,710 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:11,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:11,711 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:32:11,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:11,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:12,158 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:12,159 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:12,159 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:32:12,169 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:32:12,180 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-09-23 19:32:12,180 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:12,182 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:12,192 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:12,222 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:12,222 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-23 19:32:12,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-23 19:32:12,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-23 19:32:12,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-23 19:32:12,225 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 21 states. [2018-09-23 19:32:12,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:12,291 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-23 19:32:12,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-23 19:32:12,291 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 21 [2018-09-23 19:32:12,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:12,292 INFO L225 Difference]: With dead ends: 25 [2018-09-23 19:32:12,292 INFO L226 Difference]: Without dead ends: 23 [2018-09-23 19:32:12,293 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-23 19:32:12,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-23 19:32:12,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-23 19:32:12,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-23 19:32:12,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-23 19:32:12,297 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-09-23 19:32:12,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:12,298 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-23 19:32:12,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-23 19:32:12,298 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-23 19:32:12,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-23 19:32:12,298 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:12,299 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1, 1] [2018-09-23 19:32:12,299 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:12,299 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:12,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1958223032, now seen corresponding path program 19 times [2018-09-23 19:32:12,299 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:12,299 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:12,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:12,300 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:32:12,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:12,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:12,773 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:12,773 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:12,774 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:32:12,782 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:12,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:12,807 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:12,822 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:12,844 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:12,844 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-23 19:32:12,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-23 19:32:12,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-23 19:32:12,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-23 19:32:12,845 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 22 states. [2018-09-23 19:32:12,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:12,915 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-09-23 19:32:12,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-23 19:32:12,915 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2018-09-23 19:32:12,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:12,916 INFO L225 Difference]: With dead ends: 26 [2018-09-23 19:32:12,916 INFO L226 Difference]: Without dead ends: 24 [2018-09-23 19:32:12,917 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-23 19:32:12,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-23 19:32:12,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-23 19:32:12,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-23 19:32:12,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-09-23 19:32:12,921 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-09-23 19:32:12,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:12,922 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-09-23 19:32:12,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-23 19:32:12,922 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-09-23 19:32:12,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-23 19:32:12,923 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:12,923 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1, 1] [2018-09-23 19:32:12,923 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:12,923 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:12,923 INFO L82 PathProgramCache]: Analyzing trace with hash -575373823, now seen corresponding path program 20 times [2018-09-23 19:32:12,923 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:12,923 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:12,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:12,924 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:12,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:12,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:13,211 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:13,212 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:13,212 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:32:13,220 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:32:13,246 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:32:13,247 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:13,249 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:13,258 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:13,289 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:13,289 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-23 19:32:13,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-23 19:32:13,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-23 19:32:13,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-23 19:32:13,291 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 23 states. [2018-09-23 19:32:13,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:13,418 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-23 19:32:13,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-23 19:32:13,419 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 23 [2018-09-23 19:32:13,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:13,419 INFO L225 Difference]: With dead ends: 27 [2018-09-23 19:32:13,420 INFO L226 Difference]: Without dead ends: 25 [2018-09-23 19:32:13,420 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 [2018-09-23 19:32:13,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-23 19:32:13,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-23 19:32:13,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-23 19:32:13,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-23 19:32:13,423 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-09-23 19:32:13,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:13,423 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-23 19:32:13,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-23 19:32:13,424 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-23 19:32:13,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-23 19:32:13,424 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:13,424 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1, 1] [2018-09-23 19:32:13,425 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:13,425 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:13,425 INFO L82 PathProgramCache]: Analyzing trace with hash -656721304, now seen corresponding path program 21 times [2018-09-23 19:32:13,425 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:13,425 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:13,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:13,426 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:32:13,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:13,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:13,752 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:13,753 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:13,753 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:32:13,761 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:32:13,775 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-23 19:32:13,775 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:13,777 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:13,786 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:13,816 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:13,816 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-23 19:32:13,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-23 19:32:13,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-23 19:32:13,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-23 19:32:13,817 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 24 states. [2018-09-23 19:32:13,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:13,893 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-09-23 19:32:13,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-23 19:32:13,896 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 24 [2018-09-23 19:32:13,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:13,897 INFO L225 Difference]: With dead ends: 28 [2018-09-23 19:32:13,897 INFO L226 Difference]: Without dead ends: 26 [2018-09-23 19:32:13,897 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 [2018-09-23 19:32:13,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-23 19:32:13,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-23 19:32:13,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-23 19:32:13,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-09-23 19:32:13,900 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-09-23 19:32:13,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:13,901 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-09-23 19:32:13,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-23 19:32:13,901 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-09-23 19:32:13,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-23 19:32:13,902 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:13,902 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1, 1] [2018-09-23 19:32:13,902 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:13,902 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:13,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1116474081, now seen corresponding path program 22 times [2018-09-23 19:32:13,902 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:13,902 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:13,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:13,903 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:32:13,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:13,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:14,299 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:14,299 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:14,300 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:32:14,307 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:32:14,324 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:32:14,324 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:14,326 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:14,336 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:14,360 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:14,360 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-23 19:32:14,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-23 19:32:14,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-23 19:32:14,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-23 19:32:14,361 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 25 states. [2018-09-23 19:32:14,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:14,413 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-23 19:32:14,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-23 19:32:14,414 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 25 [2018-09-23 19:32:14,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:14,415 INFO L225 Difference]: With dead ends: 29 [2018-09-23 19:32:14,415 INFO L226 Difference]: Without dead ends: 27 [2018-09-23 19:32:14,415 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-23 19:32:14,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-23 19:32:14,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-23 19:32:14,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-23 19:32:14,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-23 19:32:14,419 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-09-23 19:32:14,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:14,420 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-23 19:32:14,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-23 19:32:14,420 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-23 19:32:14,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-23 19:32:14,420 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:14,420 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1, 1] [2018-09-23 19:32:14,421 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:14,421 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:14,421 INFO L82 PathProgramCache]: Analyzing trace with hash 250956168, now seen corresponding path program 23 times [2018-09-23 19:32:14,421 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:14,421 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:14,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:14,422 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:32:14,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:14,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:15,548 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:15,549 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:15,549 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 [2018-09-23 19:32:15,564 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:32:15,594 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-23 19:32:15,594 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:15,597 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:15,608 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:15,638 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:15,638 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-23 19:32:15,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-23 19:32:15,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-23 19:32:15,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-23 19:32:15,640 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 26 states. [2018-09-23 19:32:15,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:15,704 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-09-23 19:32:15,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-23 19:32:15,705 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 26 [2018-09-23 19:32:15,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:15,705 INFO L225 Difference]: With dead ends: 30 [2018-09-23 19:32:15,706 INFO L226 Difference]: Without dead ends: 28 [2018-09-23 19:32:15,706 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-23 19:32:15,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-23 19:32:15,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-23 19:32:15,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-23 19:32:15,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-09-23 19:32:15,710 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-09-23 19:32:15,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:15,711 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-09-23 19:32:15,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-23 19:32:15,711 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-09-23 19:32:15,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-23 19:32:15,712 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:15,712 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1, 1] [2018-09-23 19:32:15,712 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:15,712 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:15,712 INFO L82 PathProgramCache]: Analyzing trace with hash -810295359, now seen corresponding path program 24 times [2018-09-23 19:32:15,713 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:15,713 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:15,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:15,714 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:32:15,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:15,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:16,416 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:16,417 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:16,417 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 [2018-09-23 19:32:16,425 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:32:16,451 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-23 19:32:16,452 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:16,453 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:16,462 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:16,493 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:16,493 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-23 19:32:16,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-23 19:32:16,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-23 19:32:16,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-23 19:32:16,494 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 27 states. [2018-09-23 19:32:16,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:16,595 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-23 19:32:16,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-23 19:32:16,595 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 27 [2018-09-23 19:32:16,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:16,596 INFO L225 Difference]: With dead ends: 31 [2018-09-23 19:32:16,596 INFO L226 Difference]: Without dead ends: 29 [2018-09-23 19:32:16,597 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-23 19:32:16,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-23 19:32:16,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-23 19:32:16,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-23 19:32:16,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-23 19:32:16,599 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-09-23 19:32:16,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:16,600 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-23 19:32:16,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-23 19:32:16,600 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-23 19:32:16,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-23 19:32:16,601 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:16,601 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1, 1] [2018-09-23 19:32:16,601 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:16,601 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:16,601 INFO L82 PathProgramCache]: Analyzing trace with hash 650645672, now seen corresponding path program 25 times [2018-09-23 19:32:16,601 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:16,601 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:16,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:16,602 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:32:16,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:16,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:17,152 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:17,153 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:17,153 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 [2018-09-23 19:32:17,161 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:17,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:17,177 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:17,185 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:17,207 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:17,207 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-23 19:32:17,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-23 19:32:17,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-23 19:32:17,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-23 19:32:17,208 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 28 states. [2018-09-23 19:32:17,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:17,263 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-09-23 19:32:17,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-23 19:32:17,264 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 28 [2018-09-23 19:32:17,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:17,265 INFO L225 Difference]: With dead ends: 32 [2018-09-23 19:32:17,265 INFO L226 Difference]: Without dead ends: 30 [2018-09-23 19:32:17,265 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 [2018-09-23 19:32:17,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-23 19:32:17,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-23 19:32:17,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:32:17,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-09-23 19:32:17,269 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-09-23 19:32:17,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:17,269 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-09-23 19:32:17,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-23 19:32:17,269 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-09-23 19:32:17,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-23 19:32:17,269 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:17,270 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1, 1] [2018-09-23 19:32:17,270 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:17,270 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:17,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1304822623, now seen corresponding path program 26 times [2018-09-23 19:32:17,270 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:17,270 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:17,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:17,271 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:17,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:17,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:18,105 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:18,105 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:18,105 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 [2018-09-23 19:32:18,112 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:32:18,124 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:32:18,125 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:18,127 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:18,136 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:18,161 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:18,162 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-23 19:32:18,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-23 19:32:18,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-23 19:32:18,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-23 19:32:18,163 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 29 states. [2018-09-23 19:32:18,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:18,320 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-23 19:32:18,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-23 19:32:18,321 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 29 [2018-09-23 19:32:18,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:18,321 INFO L225 Difference]: With dead ends: 33 [2018-09-23 19:32:18,321 INFO L226 Difference]: Without dead ends: 31 [2018-09-23 19:32:18,322 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 [2018-09-23 19:32:18,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-23 19:32:18,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-23 19:32:18,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-23 19:32:18,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-23 19:32:18,326 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-09-23 19:32:18,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:18,327 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-23 19:32:18,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-23 19:32:18,327 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-23 19:32:18,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-23 19:32:18,327 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:18,328 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1, 1] [2018-09-23 19:32:18,328 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:18,329 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:18,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1794797624, now seen corresponding path program 27 times [2018-09-23 19:32:18,329 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:18,329 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:18,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:18,330 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:32:18,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:18,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:18,922 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:18,923 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:18,923 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:32:18,932 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:32:18,955 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-23 19:32:18,956 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:18,958 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:18,967 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:18,990 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:18,990 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-23 19:32:18,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-23 19:32:18,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-23 19:32:18,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-23 19:32:18,991 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 30 states. [2018-09-23 19:32:19,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:19,035 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-09-23 19:32:19,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-23 19:32:19,036 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 30 [2018-09-23 19:32:19,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:19,037 INFO L225 Difference]: With dead ends: 34 [2018-09-23 19:32:19,037 INFO L226 Difference]: Without dead ends: 32 [2018-09-23 19:32:19,038 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-23 19:32:19,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-23 19:32:19,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-23 19:32:19,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:32:19,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-09-23 19:32:19,041 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-09-23 19:32:19,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:19,041 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-09-23 19:32:19,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-23 19:32:19,041 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-09-23 19:32:19,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-23 19:32:19,042 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:19,042 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1, 1] [2018-09-23 19:32:19,042 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:19,042 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:19,043 INFO L82 PathProgramCache]: Analyzing trace with hash 195846529, now seen corresponding path program 28 times [2018-09-23 19:32:19,043 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:19,043 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:19,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:19,044 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:32:19,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:19,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:19,550 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:19,551 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:19,551 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 [2018-09-23 19:32:19,564 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:32:19,579 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:32:19,579 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:19,581 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:19,590 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:19,613 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:19,614 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-23 19:32:19,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-23 19:32:19,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-23 19:32:19,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-23 19:32:19,615 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 31 states. [2018-09-23 19:32:19,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:19,665 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-23 19:32:19,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-23 19:32:19,665 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 31 [2018-09-23 19:32:19,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:19,666 INFO L225 Difference]: With dead ends: 35 [2018-09-23 19:32:19,666 INFO L226 Difference]: Without dead ends: 33 [2018-09-23 19:32:19,667 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-23 19:32:19,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-23 19:32:19,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-23 19:32:19,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-23 19:32:19,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-23 19:32:19,672 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-09-23 19:32:19,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:19,672 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-23 19:32:19,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-23 19:32:19,673 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-23 19:32:19,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-23 19:32:19,673 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:19,673 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1, 1] [2018-09-23 19:32:19,673 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:19,674 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:19,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1776273128, now seen corresponding path program 29 times [2018-09-23 19:32:19,674 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:19,674 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:19,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:19,675 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:32:19,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:19,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:20,161 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:20,162 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:20,162 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 [2018-09-23 19:32:20,169 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:32:20,193 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-23 19:32:20,193 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:20,196 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:20,208 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:20,237 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:20,237 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-23 19:32:20,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-23 19:32:20,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-23 19:32:20,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-23 19:32:20,238 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 32 states. [2018-09-23 19:32:20,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:20,405 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-09-23 19:32:20,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-23 19:32:20,405 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 32 [2018-09-23 19:32:20,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:20,405 INFO L225 Difference]: With dead ends: 36 [2018-09-23 19:32:20,405 INFO L226 Difference]: Without dead ends: 34 [2018-09-23 19:32:20,406 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-23 19:32:20,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-23 19:32:20,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-23 19:32:20,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:32:20,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-09-23 19:32:20,408 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-09-23 19:32:20,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:20,408 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-09-23 19:32:20,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-23 19:32:20,408 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-09-23 19:32:20,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-23 19:32:20,409 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:20,409 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1, 1] [2018-09-23 19:32:20,409 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:20,409 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:20,409 INFO L82 PathProgramCache]: Analyzing trace with hash -770109855, now seen corresponding path program 30 times [2018-09-23 19:32:20,410 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:20,410 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:20,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:20,410 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:32:20,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:20,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:20,970 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:20,971 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:20,971 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 [2018-09-23 19:32:20,980 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:32:21,011 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-23 19:32:21,011 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:21,014 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:21,024 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:21,054 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:21,055 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-23 19:32:21,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-23 19:32:21,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-23 19:32:21,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 19:32:21,056 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 33 states. [2018-09-23 19:32:21,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:21,269 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-23 19:32:21,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-23 19:32:21,269 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 33 [2018-09-23 19:32:21,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:21,270 INFO L225 Difference]: With dead ends: 37 [2018-09-23 19:32:21,270 INFO L226 Difference]: Without dead ends: 35 [2018-09-23 19:32:21,271 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 19:32:21,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-23 19:32:21,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-23 19:32:21,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-23 19:32:21,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-23 19:32:21,274 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-09-23 19:32:21,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:21,274 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-23 19:32:21,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-23 19:32:21,274 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-23 19:32:21,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-23 19:32:21,275 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:21,275 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1, 1] [2018-09-23 19:32:21,275 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:21,275 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:21,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1896396296, now seen corresponding path program 31 times [2018-09-23 19:32:21,275 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:21,275 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:21,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:21,276 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:32:21,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:21,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:22,065 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:22,066 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:22,066 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:32:22,074 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:22,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:22,089 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:22,097 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:22,117 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:22,117 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-23 19:32:22,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-23 19:32:22,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-23 19:32:22,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 19:32:22,118 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 34 states. [2018-09-23 19:32:22,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:22,173 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-09-23 19:32:22,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-23 19:32:22,174 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 34 [2018-09-23 19:32:22,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:22,175 INFO L225 Difference]: With dead ends: 38 [2018-09-23 19:32:22,175 INFO L226 Difference]: Without dead ends: 36 [2018-09-23 19:32:22,176 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 [2018-09-23 19:32:22,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-23 19:32:22,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-23 19:32:22,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-23 19:32:22,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-09-23 19:32:22,179 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-09-23 19:32:22,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:22,179 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-09-23 19:32:22,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-23 19:32:22,180 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-09-23 19:32:22,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-23 19:32:22,180 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:22,180 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1, 1] [2018-09-23 19:32:22,180 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:22,180 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:22,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1341258943, now seen corresponding path program 32 times [2018-09-23 19:32:22,181 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:22,181 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:22,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:22,182 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:22,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:22,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:22,674 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:22,674 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:22,674 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 [2018-09-23 19:32:22,683 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:32:22,700 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:32:22,701 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:22,702 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:22,712 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:22,738 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:22,738 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-23 19:32:22,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-23 19:32:22,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-23 19:32:22,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 19:32:22,739 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 35 states. [2018-09-23 19:32:22,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:22,795 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-23 19:32:22,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-23 19:32:22,796 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 35 [2018-09-23 19:32:22,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:22,796 INFO L225 Difference]: With dead ends: 39 [2018-09-23 19:32:22,796 INFO L226 Difference]: Without dead ends: 37 [2018-09-23 19:32:22,797 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 19:32:22,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-23 19:32:22,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-23 19:32:22,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-23 19:32:22,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-23 19:32:22,800 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-09-23 19:32:22,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:22,801 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-23 19:32:22,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-23 19:32:22,801 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-23 19:32:22,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-23 19:32:22,801 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:22,801 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1, 1] [2018-09-23 19:32:22,802 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:22,802 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:22,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1370643752, now seen corresponding path program 33 times [2018-09-23 19:32:22,802 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:22,802 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:22,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:22,803 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:32:22,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:22,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:23,449 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:23,449 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:23,449 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:32:23,457 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:32:23,478 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-23 19:32:23,478 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:23,480 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:23,488 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:23,509 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:23,509 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-23 19:32:23,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-23 19:32:23,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-23 19:32:23,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 19:32:23,510 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 36 states. [2018-09-23 19:32:23,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:23,567 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-09-23 19:32:23,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-23 19:32:23,567 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 36 [2018-09-23 19:32:23,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:23,568 INFO L225 Difference]: With dead ends: 40 [2018-09-23 19:32:23,568 INFO L226 Difference]: Without dead ends: 38 [2018-09-23 19:32:23,569 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 19:32:23,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-23 19:32:23,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-23 19:32:23,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-23 19:32:23,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-09-23 19:32:23,572 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-09-23 19:32:23,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:23,572 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-09-23 19:32:23,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-23 19:32:23,572 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-09-23 19:32:23,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-23 19:32:23,572 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:23,572 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1, 1] [2018-09-23 19:32:23,573 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:23,573 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:23,573 INFO L82 PathProgramCache]: Analyzing trace with hash -459718623, now seen corresponding path program 34 times [2018-09-23 19:32:23,573 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:23,573 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:23,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:23,574 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:32:23,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:23,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:24,133 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:24,133 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:24,133 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:32:24,141 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:32:24,160 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:32:24,160 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:24,161 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:24,171 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:24,194 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:24,194 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-23 19:32:24,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-23 19:32:24,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-23 19:32:24,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 19:32:24,195 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 37 states. [2018-09-23 19:32:24,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:24,253 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-23 19:32:24,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-23 19:32:24,254 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 37 [2018-09-23 19:32:24,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:24,254 INFO L225 Difference]: With dead ends: 41 [2018-09-23 19:32:24,254 INFO L226 Difference]: Without dead ends: 39 [2018-09-23 19:32:24,256 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 [2018-09-23 19:32:24,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-23 19:32:24,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-23 19:32:24,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-23 19:32:24,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-23 19:32:24,258 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-09-23 19:32:24,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:24,258 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-23 19:32:24,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-23 19:32:24,258 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-23 19:32:24,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-23 19:32:24,259 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:24,259 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1, 1] [2018-09-23 19:32:24,259 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:24,259 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:24,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1366377400, now seen corresponding path program 35 times [2018-09-23 19:32:24,260 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:24,260 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:24,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:24,261 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:32:24,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:24,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:24,857 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:24,857 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:24,857 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 [2018-09-23 19:32:24,865 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:32:24,888 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-23 19:32:24,888 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:24,890 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:24,903 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:24,924 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:24,924 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-23 19:32:24,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-23 19:32:24,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-23 19:32:24,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 19:32:24,925 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 38 states. [2018-09-23 19:32:25,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:25,001 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-09-23 19:32:25,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-23 19:32:25,001 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 38 [2018-09-23 19:32:25,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:25,002 INFO L225 Difference]: With dead ends: 42 [2018-09-23 19:32:25,002 INFO L226 Difference]: Without dead ends: 40 [2018-09-23 19:32:25,003 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 19:32:25,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-23 19:32:25,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-23 19:32:25,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-23 19:32:25,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-09-23 19:32:25,006 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-09-23 19:32:25,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:25,006 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-09-23 19:32:25,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-23 19:32:25,007 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-09-23 19:32:25,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-23 19:32:25,007 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:25,007 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1, 1] [2018-09-23 19:32:25,007 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:25,007 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:25,008 INFO L82 PathProgramCache]: Analyzing trace with hash 591971585, now seen corresponding path program 36 times [2018-09-23 19:32:25,008 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:25,008 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:25,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:25,008 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:32:25,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:25,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:25,708 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:25,708 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:25,708 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 [2018-09-23 19:32:25,717 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:32:25,755 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-23 19:32:25,756 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:25,758 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:25,768 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:25,797 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:25,798 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-23 19:32:25,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-23 19:32:25,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-23 19:32:25,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-23 19:32:25,799 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 39 states. [2018-09-23 19:32:25,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:25,857 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-23 19:32:25,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-23 19:32:25,857 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 39 [2018-09-23 19:32:25,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:25,858 INFO L225 Difference]: With dead ends: 43 [2018-09-23 19:32:25,858 INFO L226 Difference]: Without dead ends: 41 [2018-09-23 19:32:25,859 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 [2018-09-23 19:32:25,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-23 19:32:25,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-23 19:32:25,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-23 19:32:25,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-23 19:32:25,861 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-09-23 19:32:25,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:25,861 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-23 19:32:25,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-23 19:32:25,861 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-23 19:32:25,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-23 19:32:25,862 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:25,862 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1, 1] [2018-09-23 19:32:25,862 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:25,862 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:25,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1171247976, now seen corresponding path program 37 times [2018-09-23 19:32:25,862 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:25,863 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:25,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:25,863 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:32:25,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:25,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:26,458 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:26,458 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:26,458 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 [2018-09-23 19:32:26,467 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:26,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:26,484 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:26,495 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:26,515 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:26,515 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-23 19:32:26,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-23 19:32:26,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-23 19:32:26,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 19:32:26,516 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 40 states. [2018-09-23 19:32:26,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:26,643 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-09-23 19:32:26,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-23 19:32:26,643 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 40 [2018-09-23 19:32:26,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:26,644 INFO L225 Difference]: With dead ends: 44 [2018-09-23 19:32:26,644 INFO L226 Difference]: Without dead ends: 42 [2018-09-23 19:32:26,644 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 [2018-09-23 19:32:26,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-23 19:32:26,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-23 19:32:26,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-23 19:32:26,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-09-23 19:32:26,646 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-09-23 19:32:26,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:26,646 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-09-23 19:32:26,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-23 19:32:26,646 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-09-23 19:32:26,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-23 19:32:26,647 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:26,647 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1, 1] [2018-09-23 19:32:26,647 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:26,647 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:26,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1948946913, now seen corresponding path program 38 times [2018-09-23 19:32:26,648 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:26,648 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:26,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:26,648 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:26,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:26,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:27,410 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:27,410 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:27,410 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:32:27,417 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:32:27,435 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:32:27,435 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:27,437 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:27,448 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:27,471 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:27,471 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-23 19:32:27,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-23 19:32:27,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-23 19:32:27,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 19:32:27,472 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 41 states. [2018-09-23 19:32:27,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:27,545 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-23 19:32:27,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-23 19:32:27,545 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 41 [2018-09-23 19:32:27,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:27,546 INFO L225 Difference]: With dead ends: 45 [2018-09-23 19:32:27,546 INFO L226 Difference]: Without dead ends: 43 [2018-09-23 19:32:27,547 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 19:32:27,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-23 19:32:27,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-23 19:32:27,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-23 19:32:27,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-23 19:32:27,549 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-09-23 19:32:27,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:27,550 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-23 19:32:27,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-23 19:32:27,550 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-23 19:32:27,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-23 19:32:27,550 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:27,550 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1, 1] [2018-09-23 19:32:27,550 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:27,551 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:27,551 INFO L82 PathProgramCache]: Analyzing trace with hash 287810184, now seen corresponding path program 39 times [2018-09-23 19:32:27,551 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:27,551 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:27,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:27,551 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:32:27,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:27,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:28,578 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:28,579 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:28,579 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:32:28,586 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:32:28,609 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-09-23 19:32:28,609 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:28,610 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:28,622 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:28,653 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:28,653 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-23 19:32:28,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-23 19:32:28,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-23 19:32:28,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 19:32:28,654 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 42 states. [2018-09-23 19:32:29,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:29,482 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-09-23 19:32:29,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-23 19:32:29,482 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 42 [2018-09-23 19:32:29,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:29,483 INFO L225 Difference]: With dead ends: 46 [2018-09-23 19:32:29,483 INFO L226 Difference]: Without dead ends: 44 [2018-09-23 19:32:29,484 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 19:32:29,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-23 19:32:29,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-23 19:32:29,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-23 19:32:29,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-09-23 19:32:29,486 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-09-23 19:32:29,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:29,487 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-09-23 19:32:29,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-23 19:32:29,487 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-09-23 19:32:29,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-23 19:32:29,487 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:29,487 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1, 1] [2018-09-23 19:32:29,488 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:29,488 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:29,488 INFO L82 PathProgramCache]: Analyzing trace with hash 332179137, now seen corresponding path program 40 times [2018-09-23 19:32:29,488 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:29,488 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:29,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:29,489 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:32:29,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:29,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:30,686 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:30,686 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:30,686 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:32:30,693 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:32:30,724 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:32:30,725 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:30,727 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:30,741 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:30,763 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:30,763 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-23 19:32:30,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-23 19:32:30,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-23 19:32:30,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 19:32:30,765 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 43 states. [2018-09-23 19:32:30,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:30,883 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-23 19:32:30,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-23 19:32:30,884 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 43 [2018-09-23 19:32:30,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:30,884 INFO L225 Difference]: With dead ends: 47 [2018-09-23 19:32:30,885 INFO L226 Difference]: Without dead ends: 45 [2018-09-23 19:32:30,886 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 19:32:30,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-23 19:32:30,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-23 19:32:30,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-23 19:32:30,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-23 19:32:30,888 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-09-23 19:32:30,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:30,888 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-23 19:32:30,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-23 19:32:30,889 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-23 19:32:30,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-23 19:32:30,889 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:30,889 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1, 1] [2018-09-23 19:32:30,889 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:30,889 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:30,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1707616680, now seen corresponding path program 41 times [2018-09-23 19:32:30,889 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:30,889 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:30,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:30,890 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:32:30,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:30,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:32,491 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:32,491 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:32,491 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:32:32,498 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:32:32,528 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-23 19:32:32,528 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:32,530 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:32,540 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:32,560 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:32,560 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-23 19:32:32,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-23 19:32:32,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-23 19:32:32,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 19:32:32,561 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 44 states. [2018-09-23 19:32:32,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:32,620 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-09-23 19:32:32,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-23 19:32:32,620 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 44 [2018-09-23 19:32:32,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:32,621 INFO L225 Difference]: With dead ends: 48 [2018-09-23 19:32:32,621 INFO L226 Difference]: Without dead ends: 46 [2018-09-23 19:32:32,622 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 19:32:32,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-23 19:32:32,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-23 19:32:32,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-23 19:32:32,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-09-23 19:32:32,624 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-09-23 19:32:32,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:32,624 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-09-23 19:32:32,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-23 19:32:32,625 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-09-23 19:32:32,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-23 19:32:32,625 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:32,625 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1, 1] [2018-09-23 19:32:32,625 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:32,625 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:32,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1396507553, now seen corresponding path program 42 times [2018-09-23 19:32:32,625 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:32,626 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:32,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:32,626 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:32:32,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:32,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:33,496 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:33,497 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:33,497 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 [2018-09-23 19:32:33,504 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:32:33,527 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-09-23 19:32:33,528 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:33,529 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:33,541 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:33,566 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:33,566 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-23 19:32:33,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-23 19:32:33,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-23 19:32:33,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 19:32:33,568 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 45 states. [2018-09-23 19:32:33,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:33,671 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-23 19:32:33,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-23 19:32:33,671 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 45 [2018-09-23 19:32:33,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:33,672 INFO L225 Difference]: With dead ends: 49 [2018-09-23 19:32:33,672 INFO L226 Difference]: Without dead ends: 47 [2018-09-23 19:32:33,673 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 19:32:33,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-23 19:32:33,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-23 19:32:33,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-23 19:32:33,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-23 19:32:33,676 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-09-23 19:32:33,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:33,677 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-23 19:32:33,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-23 19:32:33,677 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-23 19:32:33,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-23 19:32:33,677 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:33,677 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1, 1] [2018-09-23 19:32:33,678 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:33,678 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:33,678 INFO L82 PathProgramCache]: Analyzing trace with hash 342059208, now seen corresponding path program 43 times [2018-09-23 19:32:33,678 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:33,678 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:33,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:33,679 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:32:33,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:33,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:34,460 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:34,460 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:34,460 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:32:34,467 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:34,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:34,486 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:34,494 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:34,514 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:34,515 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-23 19:32:34,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-23 19:32:34,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-23 19:32:34,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 19:32:34,516 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 46 states. [2018-09-23 19:32:34,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:34,636 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-09-23 19:32:34,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-23 19:32:34,636 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 46 [2018-09-23 19:32:34,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:34,637 INFO L225 Difference]: With dead ends: 50 [2018-09-23 19:32:34,637 INFO L226 Difference]: Without dead ends: 48 [2018-09-23 19:32:34,638 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 19:32:34,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-23 19:32:34,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-09-23 19:32:34,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-23 19:32:34,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-09-23 19:32:34,641 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-09-23 19:32:34,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:34,642 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-09-23 19:32:34,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-23 19:32:34,642 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-09-23 19:32:34,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-23 19:32:34,642 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:34,643 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1, 1] [2018-09-23 19:32:34,643 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:34,643 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:34,643 INFO L82 PathProgramCache]: Analyzing trace with hash 2013898881, now seen corresponding path program 44 times [2018-09-23 19:32:34,643 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:34,644 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:34,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:34,645 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:34,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:34,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:35,499 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:35,499 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:35,499 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 [2018-09-23 19:32:35,507 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:32:35,529 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:32:35,529 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:35,531 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:35,542 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:35,562 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:35,562 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-23 19:32:35,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-23 19:32:35,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-23 19:32:35,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 19:32:35,563 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 47 states. [2018-09-23 19:32:35,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:35,628 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-23 19:32:35,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-23 19:32:35,629 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 47 [2018-09-23 19:32:35,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:35,630 INFO L225 Difference]: With dead ends: 51 [2018-09-23 19:32:35,630 INFO L226 Difference]: Without dead ends: 49 [2018-09-23 19:32:35,631 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 19:32:35,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-23 19:32:35,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-23 19:32:35,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-23 19:32:35,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-23 19:32:35,634 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-09-23 19:32:35,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:35,634 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-23 19:32:35,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-23 19:32:35,635 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-23 19:32:35,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-23 19:32:35,635 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:35,635 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1, 1] [2018-09-23 19:32:35,636 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:35,636 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:35,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1993646104, now seen corresponding path program 45 times [2018-09-23 19:32:35,636 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:35,636 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:35,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:35,637 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:32:35,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:35,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:36,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:36,574 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:36,574 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 [2018-09-23 19:32:36,584 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:32:36,610 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-23 19:32:36,610 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:36,613 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:36,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:36,646 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:36,646 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-23 19:32:36,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-23 19:32:36,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-23 19:32:36,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 19:32:36,647 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 48 states. [2018-09-23 19:32:37,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:37,103 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-09-23 19:32:37,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-23 19:32:37,104 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 48 [2018-09-23 19:32:37,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:37,104 INFO L225 Difference]: With dead ends: 52 [2018-09-23 19:32:37,104 INFO L226 Difference]: Without dead ends: 50 [2018-09-23 19:32:37,105 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 19:32:37,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-23 19:32:37,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-23 19:32:37,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-23 19:32:37,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-09-23 19:32:37,107 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-09-23 19:32:37,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:37,108 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-09-23 19:32:37,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-23 19:32:37,108 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-09-23 19:32:37,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-23 19:32:37,108 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:37,108 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1, 1] [2018-09-23 19:32:37,109 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:37,109 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:37,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1673489055, now seen corresponding path program 46 times [2018-09-23 19:32:37,109 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:37,109 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:37,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:37,110 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:32:37,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:37,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:38,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:38,100 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:38,101 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:32:38,108 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:32:38,128 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:32:38,129 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:38,130 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:38,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:38,172 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:38,173 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-23 19:32:38,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-23 19:32:38,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-23 19:32:38,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-23 19:32:38,174 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 49 states. [2018-09-23 19:32:38,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:38,274 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-23 19:32:38,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-23 19:32:38,275 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 49 [2018-09-23 19:32:38,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:38,276 INFO L225 Difference]: With dead ends: 53 [2018-09-23 19:32:38,276 INFO L226 Difference]: Without dead ends: 51 [2018-09-23 19:32:38,277 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-23 19:32:38,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-23 19:32:38,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-23 19:32:38,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-23 19:32:38,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-23 19:32:38,279 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-09-23 19:32:38,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:38,280 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-23 19:32:38,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-23 19:32:38,280 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-23 19:32:38,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-23 19:32:38,280 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:38,280 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1, 1] [2018-09-23 19:32:38,281 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:38,281 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:38,281 INFO L82 PathProgramCache]: Analyzing trace with hash -338555128, now seen corresponding path program 47 times [2018-09-23 19:32:38,281 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:38,281 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:38,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:38,282 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:32:38,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:38,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:39,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:39,365 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:39,365 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 [2018-09-23 19:32:39,372 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:32:39,402 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-23 19:32:39,402 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:39,404 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:39,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:39,448 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:39,449 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-23 19:32:39,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-23 19:32:39,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-23 19:32:39,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 19:32:39,450 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 50 states. [2018-09-23 19:32:39,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:39,583 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-09-23 19:32:39,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-23 19:32:39,583 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 50 [2018-09-23 19:32:39,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:39,584 INFO L225 Difference]: With dead ends: 54 [2018-09-23 19:32:39,584 INFO L226 Difference]: Without dead ends: 52 [2018-09-23 19:32:39,585 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 19:32:39,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-23 19:32:39,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-23 19:32:39,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-23 19:32:39,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-09-23 19:32:39,588 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-09-23 19:32:39,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:39,588 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-09-23 19:32:39,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-23 19:32:39,588 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-09-23 19:32:39,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-23 19:32:39,588 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:39,589 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1, 1] [2018-09-23 19:32:39,589 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:39,589 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:39,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1905276351, now seen corresponding path program 48 times [2018-09-23 19:32:39,589 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:39,589 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:39,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:39,590 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:32:39,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:39,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:40,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:40,683 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:40,683 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 [2018-09-23 19:32:40,692 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:32:40,729 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-23 19:32:40,729 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:40,731 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:40,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:40,775 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:40,776 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-23 19:32:40,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-23 19:32:40,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-23 19:32:40,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-23 19:32:40,776 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 51 states. [2018-09-23 19:32:40,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:40,867 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-23 19:32:40,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-23 19:32:40,867 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 51 [2018-09-23 19:32:40,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:40,868 INFO L225 Difference]: With dead ends: 55 [2018-09-23 19:32:40,868 INFO L226 Difference]: Without dead ends: 53 [2018-09-23 19:32:40,869 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 [2018-09-23 19:32:40,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-23 19:32:40,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-23 19:32:40,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-23 19:32:40,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-23 19:32:40,871 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-09-23 19:32:40,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:40,871 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-23 19:32:40,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-23 19:32:40,871 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-23 19:32:40,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-23 19:32:40,872 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:40,872 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1, 1] [2018-09-23 19:32:40,872 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:40,872 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:40,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1065973288, now seen corresponding path program 49 times [2018-09-23 19:32:40,872 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:40,872 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:40,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:40,873 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:32:40,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:40,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:42,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:42,285 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:42,285 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:32:42,292 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:42,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:42,318 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:42,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:42,349 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:42,349 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-23 19:32:42,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-23 19:32:42,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-23 19:32:42,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 19:32:42,350 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 52 states. [2018-09-23 19:32:42,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:42,429 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-09-23 19:32:42,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-23 19:32:42,430 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 52 [2018-09-23 19:32:42,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:42,431 INFO L225 Difference]: With dead ends: 56 [2018-09-23 19:32:42,431 INFO L226 Difference]: Without dead ends: 54 [2018-09-23 19:32:42,431 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 19:32:42,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-23 19:32:42,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-09-23 19:32:42,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-23 19:32:42,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-09-23 19:32:42,434 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-09-23 19:32:42,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:42,435 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-09-23 19:32:42,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-23 19:32:42,435 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-09-23 19:32:42,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-23 19:32:42,435 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:42,435 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1, 1] [2018-09-23 19:32:42,436 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:42,436 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:42,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1314568415, now seen corresponding path program 50 times [2018-09-23 19:32:42,436 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:42,436 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:42,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:42,437 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:42,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:42,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:43,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:43,462 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:43,462 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:32:43,471 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:32:43,493 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:32:43,493 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:43,496 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:43,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:43,537 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:43,538 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-23 19:32:43,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-23 19:32:43,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-23 19:32:43,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 19:32:43,539 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 53 states. [2018-09-23 19:32:43,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:43,636 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-23 19:32:43,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-23 19:32:43,637 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 53 [2018-09-23 19:32:43,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:43,638 INFO L225 Difference]: With dead ends: 57 [2018-09-23 19:32:43,638 INFO L226 Difference]: Without dead ends: 55 [2018-09-23 19:32:43,639 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 19:32:43,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-23 19:32:43,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-23 19:32:43,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-23 19:32:43,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-23 19:32:43,640 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-09-23 19:32:43,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:43,640 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-23 19:32:43,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-23 19:32:43,641 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-23 19:32:43,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-23 19:32:43,641 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:43,641 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1, 1] [2018-09-23 19:32:43,641 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:43,642 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:43,642 INFO L82 PathProgramCache]: Analyzing trace with hash -2096917176, now seen corresponding path program 51 times [2018-09-23 19:32:43,642 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:43,642 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:43,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:43,643 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:32:43,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:43,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:44,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:44,684 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:44,684 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 [2018-09-23 19:32:44,691 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:32:44,722 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-09-23 19:32:44,723 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:44,724 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:44,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:44,761 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:44,761 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-23 19:32:44,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-23 19:32:44,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-23 19:32:44,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 19:32:44,763 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 54 states. [2018-09-23 19:32:44,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:44,893 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-09-23 19:32:44,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-23 19:32:44,894 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 54 [2018-09-23 19:32:44,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:44,895 INFO L225 Difference]: With dead ends: 58 [2018-09-23 19:32:44,895 INFO L226 Difference]: Without dead ends: 56 [2018-09-23 19:32:44,896 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 19:32:44,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-23 19:32:44,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-23 19:32:44,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-23 19:32:44,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-09-23 19:32:44,898 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-09-23 19:32:44,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:44,898 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-09-23 19:32:44,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-23 19:32:44,899 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-09-23 19:32:44,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-23 19:32:44,899 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:44,899 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1, 1] [2018-09-23 19:32:44,899 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:44,900 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:44,900 INFO L82 PathProgramCache]: Analyzing trace with hash -579924991, now seen corresponding path program 52 times [2018-09-23 19:32:44,900 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:44,900 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:44,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:44,901 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:32:44,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:44,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:46,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:46,134 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:46,134 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 [2018-09-23 19:32:46,141 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:32:46,164 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:32:46,164 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:46,166 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:46,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:46,209 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:46,209 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-23 19:32:46,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-23 19:32:46,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-23 19:32:46,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-23 19:32:46,211 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 55 states. [2018-09-23 19:32:46,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:46,389 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-23 19:32:46,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-23 19:32:46,390 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 55 [2018-09-23 19:32:46,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:46,390 INFO L225 Difference]: With dead ends: 59 [2018-09-23 19:32:46,390 INFO L226 Difference]: Without dead ends: 57 [2018-09-23 19:32:46,391 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 [2018-09-23 19:32:46,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-23 19:32:46,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-23 19:32:46,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-23 19:32:46,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-09-23 19:32:46,393 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-09-23 19:32:46,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:46,394 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-09-23 19:32:46,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-23 19:32:46,394 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-09-23 19:32:46,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-23 19:32:46,394 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:46,395 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1, 1] [2018-09-23 19:32:46,395 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:46,395 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:46,395 INFO L82 PathProgramCache]: Analyzing trace with hash -797807512, now seen corresponding path program 53 times [2018-09-23 19:32:46,395 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:46,395 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:46,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:46,396 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:32:46,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:46,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:47,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:47,811 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:47,811 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:32:47,818 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:32:47,848 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-09-23 19:32:47,848 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:47,850 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:47,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:47,891 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:47,891 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-23 19:32:47,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-23 19:32:47,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-23 19:32:47,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 19:32:47,892 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 56 states. [2018-09-23 19:32:47,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:47,969 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-09-23 19:32:47,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-23 19:32:47,970 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 56 [2018-09-23 19:32:47,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:47,971 INFO L225 Difference]: With dead ends: 60 [2018-09-23 19:32:47,971 INFO L226 Difference]: Without dead ends: 58 [2018-09-23 19:32:47,972 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 19:32:47,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-23 19:32:47,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-23 19:32:47,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-23 19:32:47,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-09-23 19:32:47,975 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-09-23 19:32:47,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:47,975 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-09-23 19:32:47,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-23 19:32:47,975 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-09-23 19:32:47,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-23 19:32:47,975 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:47,976 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1, 1] [2018-09-23 19:32:47,976 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:47,976 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:47,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1037768929, now seen corresponding path program 54 times [2018-09-23 19:32:47,976 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:47,976 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:47,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:47,977 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:32:47,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:47,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:49,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:49,107 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:49,108 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:32:49,115 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:32:49,147 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-09-23 19:32:49,147 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:49,149 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:49,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:49,179 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:49,179 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-23 19:32:49,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-23 19:32:49,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-23 19:32:49,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-23 19:32:49,180 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 57 states. [2018-09-23 19:32:49,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:49,271 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-23 19:32:49,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-23 19:32:49,271 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 57 [2018-09-23 19:32:49,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:49,272 INFO L225 Difference]: With dead ends: 61 [2018-09-23 19:32:49,272 INFO L226 Difference]: Without dead ends: 59 [2018-09-23 19:32:49,272 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-23 19:32:49,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-23 19:32:49,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-23 19:32:49,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-23 19:32:49,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-23 19:32:49,276 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-09-23 19:32:49,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:49,276 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-23 19:32:49,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-23 19:32:49,276 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-23 19:32:49,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-23 19:32:49,276 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:49,277 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1, 1] [2018-09-23 19:32:49,277 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:49,277 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:49,277 INFO L82 PathProgramCache]: Analyzing trace with hash 2106063752, now seen corresponding path program 55 times [2018-09-23 19:32:49,277 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:49,277 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:49,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:49,278 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:32:49,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:49,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:50,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:50,572 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:50,572 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 [2018-09-23 19:32:50,580 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:50,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:50,607 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:50,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:50,653 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:50,654 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-23 19:32:50,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-23 19:32:50,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-23 19:32:50,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 19:32:50,655 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 58 states. [2018-09-23 19:32:50,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:50,810 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-09-23 19:32:50,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-23 19:32:50,810 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 58 [2018-09-23 19:32:50,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:50,811 INFO L225 Difference]: With dead ends: 62 [2018-09-23 19:32:50,811 INFO L226 Difference]: Without dead ends: 60 [2018-09-23 19:32:50,812 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 [2018-09-23 19:32:50,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-09-23 19:32:50,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-09-23 19:32:50,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-23 19:32:50,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-09-23 19:32:50,814 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-09-23 19:32:50,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:50,815 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-09-23 19:32:50,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-23 19:32:50,815 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-09-23 19:32:50,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-23 19:32:50,815 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:50,815 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1, 1] [2018-09-23 19:32:50,816 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:50,816 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:50,816 INFO L82 PathProgramCache]: Analyzing trace with hash 863464897, now seen corresponding path program 56 times [2018-09-23 19:32:50,816 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:50,816 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:50,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:50,817 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:50,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:50,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:52,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:52,108 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:52,108 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:32:52,116 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:32:52,140 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:32:52,141 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:52,142 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:52,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:52,184 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:52,185 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-23 19:32:52,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-23 19:32:52,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-23 19:32:52,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-23 19:32:52,186 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 59 states. [2018-09-23 19:32:52,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:52,473 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-23 19:32:52,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-23 19:32:52,473 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 59 [2018-09-23 19:32:52,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:52,474 INFO L225 Difference]: With dead ends: 63 [2018-09-23 19:32:52,474 INFO L226 Difference]: Without dead ends: 61 [2018-09-23 19:32:52,475 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-23 19:32:52,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-23 19:32:52,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-23 19:32:52,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-23 19:32:52,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-09-23 19:32:52,479 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-09-23 19:32:52,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:52,479 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-09-23 19:32:52,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-23 19:32:52,480 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-09-23 19:32:52,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-23 19:32:52,480 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:52,480 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1, 1] [2018-09-23 19:32:52,480 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:52,481 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:52,481 INFO L82 PathProgramCache]: Analyzing trace with hash 997606056, now seen corresponding path program 57 times [2018-09-23 19:32:52,481 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:52,481 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:52,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:52,482 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:32:52,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:52,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:53,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:53,735 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:53,735 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 [2018-09-23 19:32:53,742 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:32:53,779 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-09-23 19:32:53,780 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:53,782 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:53,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:53,822 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:53,823 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-23 19:32:53,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-23 19:32:53,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-23 19:32:53,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-23 19:32:53,824 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 60 states. [2018-09-23 19:32:53,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:53,942 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-09-23 19:32:53,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-23 19:32:53,942 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 60 [2018-09-23 19:32:53,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:53,943 INFO L225 Difference]: With dead ends: 64 [2018-09-23 19:32:53,943 INFO L226 Difference]: Without dead ends: 62 [2018-09-23 19:32:53,944 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-23 19:32:53,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-09-23 19:32:53,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-09-23 19:32:53,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-09-23 19:32:53,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-09-23 19:32:53,946 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-09-23 19:32:53,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:53,946 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-09-23 19:32:53,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-23 19:32:53,947 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-09-23 19:32:53,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-09-23 19:32:53,947 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:53,947 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1, 1] [2018-09-23 19:32:53,947 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:53,947 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:53,948 INFO L82 PathProgramCache]: Analyzing trace with hash 861014689, now seen corresponding path program 58 times [2018-09-23 19:32:53,948 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:53,948 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:53,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:53,949 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:32:53,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:53,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:55,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:55,501 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:55,502 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:32:55,513 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:32:55,536 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:32:55,536 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:55,538 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:55,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:55,570 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:55,570 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-23 19:32:55,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-23 19:32:55,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-23 19:32:55,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-23 19:32:55,571 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 61 states. [2018-09-23 19:32:55,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:55,678 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-23 19:32:55,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-23 19:32:55,679 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 61 [2018-09-23 19:32:55,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:55,680 INFO L225 Difference]: With dead ends: 65 [2018-09-23 19:32:55,680 INFO L226 Difference]: Without dead ends: 63 [2018-09-23 19:32:55,680 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-23 19:32:55,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-23 19:32:55,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-23 19:32:55,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-23 19:32:55,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-09-23 19:32:55,683 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-09-23 19:32:55,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:55,683 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-09-23 19:32:55,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-23 19:32:55,684 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-09-23 19:32:55,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-23 19:32:55,684 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:55,684 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1, 1] [2018-09-23 19:32:55,684 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:55,685 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:55,685 INFO L82 PathProgramCache]: Analyzing trace with hash 921649608, now seen corresponding path program 59 times [2018-09-23 19:32:55,685 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:55,685 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:55,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:55,686 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:32:55,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:55,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:57,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:57,339 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:57,339 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:32:57,346 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:32:57,407 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-09-23 19:32:57,407 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:57,409 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:57,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:57,452 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:57,452 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-23 19:32:57,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-23 19:32:57,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-23 19:32:57,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-23 19:32:57,453 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 62 states. [2018-09-23 19:32:57,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:57,605 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-09-23 19:32:57,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-23 19:32:57,605 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 62 [2018-09-23 19:32:57,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:57,606 INFO L225 Difference]: With dead ends: 66 [2018-09-23 19:32:57,606 INFO L226 Difference]: Without dead ends: 64 [2018-09-23 19:32:57,607 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-23 19:32:57,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-23 19:32:57,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-09-23 19:32:57,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-23 19:32:57,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-09-23 19:32:57,610 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-09-23 19:32:57,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:57,610 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-09-23 19:32:57,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-23 19:32:57,610 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-09-23 19:32:57,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-23 19:32:57,610 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:57,611 INFO L375 BasicCegarLoop]: trace histogram [60, 1, 1, 1] [2018-09-23 19:32:57,611 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:57,611 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:57,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1493635199, now seen corresponding path program 60 times [2018-09-23 19:32:57,611 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:57,611 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:57,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:57,612 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:32:57,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:57,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:59,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:59,199 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:59,199 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 [2018-09-23 19:32:59,206 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:32:59,250 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-23 19:32:59,251 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:59,253 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:59,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:59,296 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:59,296 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-09-23 19:32:59,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-23 19:32:59,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-23 19:32:59,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-23 19:32:59,297 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 63 states. [2018-09-23 19:32:59,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:59,389 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-23 19:32:59,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-23 19:32:59,390 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 63 [2018-09-23 19:32:59,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:59,391 INFO L225 Difference]: With dead ends: 67 [2018-09-23 19:32:59,391 INFO L226 Difference]: Without dead ends: 65 [2018-09-23 19:32:59,391 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-23 19:32:59,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-23 19:32:59,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-23 19:32:59,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-23 19:32:59,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-09-23 19:32:59,394 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-09-23 19:32:59,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:59,394 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-09-23 19:32:59,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-23 19:32:59,394 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-09-23 19:32:59,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-23 19:32:59,395 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:59,395 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1, 1] [2018-09-23 19:32:59,395 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:59,395 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:59,396 INFO L82 PathProgramCache]: Analyzing trace with hash 941947112, now seen corresponding path program 61 times [2018-09-23 19:32:59,396 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:59,396 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:59,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:59,396 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:32:59,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:59,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:00,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:00,886 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:33:00,886 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 [2018-09-23 19:33:00,893 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:33:00,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:00,923 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:33:00,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:00,955 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:33:00,955 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-23 19:33:00,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-23 19:33:00,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-23 19:33:00,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-23 19:33:00,956 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 64 states. [2018-09-23 19:33:01,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:33:01,041 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-09-23 19:33:01,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-23 19:33:01,041 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 64 [2018-09-23 19:33:01,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:33:01,042 INFO L225 Difference]: With dead ends: 68 [2018-09-23 19:33:01,042 INFO L226 Difference]: Without dead ends: 66 [2018-09-23 19:33:01,043 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-23 19:33:01,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-23 19:33:01,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-09-23 19:33:01,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-23 19:33:01,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-09-23 19:33:01,046 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-09-23 19:33:01,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:33:01,046 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-09-23 19:33:01,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-23 19:33:01,046 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-09-23 19:33:01,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-23 19:33:01,046 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:33:01,046 INFO L375 BasicCegarLoop]: trace histogram [62, 1, 1, 1] [2018-09-23 19:33:01,046 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:33:01,047 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:33:01,047 INFO L82 PathProgramCache]: Analyzing trace with hash -864412575, now seen corresponding path program 62 times [2018-09-23 19:33:01,047 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:33:01,047 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:33:01,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:01,048 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:33:01,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:01,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:02,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:02,864 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:33:02,864 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 [2018-09-23 19:33:02,872 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:33:02,899 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:33:02,899 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:33:02,901 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:33:02,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:02,941 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:33:02,942 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-23 19:33:02,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-23 19:33:02,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-23 19:33:02,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-23 19:33:02,943 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 65 states. [2018-09-23 19:33:03,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:33:03,101 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-23 19:33:03,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-23 19:33:03,101 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 65 [2018-09-23 19:33:03,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:33:03,102 INFO L225 Difference]: With dead ends: 69 [2018-09-23 19:33:03,102 INFO L226 Difference]: Without dead ends: 67 [2018-09-23 19:33:03,102 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 [2018-09-23 19:33:03,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-23 19:33:03,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-23 19:33:03,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-23 19:33:03,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-09-23 19:33:03,104 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-09-23 19:33:03,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:33:03,105 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-09-23 19:33:03,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-23 19:33:03,105 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-09-23 19:33:03,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-23 19:33:03,105 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:33:03,106 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1, 1] [2018-09-23 19:33:03,106 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:33:03,106 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:33:03,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1026988024, now seen corresponding path program 63 times [2018-09-23 19:33:03,106 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:33:03,106 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:33:03,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:03,107 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:33:03,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:03,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:04,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:04,698 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:33:04,698 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:33:04,724 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:33:04,763 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-09-23 19:33:04,763 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:33:04,765 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:33:04,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:04,806 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:33:04,806 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-23 19:33:04,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-23 19:33:04,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-23 19:33:04,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-23 19:33:04,807 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 66 states. [2018-09-23 19:33:04,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:33:04,931 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-09-23 19:33:04,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-23 19:33:04,939 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 66 [2018-09-23 19:33:04,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:33:04,939 INFO L225 Difference]: With dead ends: 70 [2018-09-23 19:33:04,939 INFO L226 Difference]: Without dead ends: 68 [2018-09-23 19:33:04,940 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 [2018-09-23 19:33:04,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-23 19:33:04,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-09-23 19:33:04,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-23 19:33:04,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-09-23 19:33:04,942 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-09-23 19:33:04,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:33:04,942 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-09-23 19:33:04,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-23 19:33:04,943 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-09-23 19:33:04,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-09-23 19:33:04,943 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:33:04,943 INFO L375 BasicCegarLoop]: trace histogram [64, 1, 1, 1] [2018-09-23 19:33:04,944 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:33:04,944 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:33:04,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1771859647, now seen corresponding path program 64 times [2018-09-23 19:33:04,944 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:33:04,944 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:33:04,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:04,945 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:33:04,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:04,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:06,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:06,556 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:33:06,556 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 [2018-09-23 19:33:06,569 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:33:06,596 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:33:06,596 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:33:06,598 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:33:06,611 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:06,643 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:33:06,643 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-23 19:33:06,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-23 19:33:06,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-23 19:33:06,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-23 19:33:06,644 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 67 states. [2018-09-23 19:33:06,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:33:06,813 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-23 19:33:06,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-23 19:33:06,814 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 67 [2018-09-23 19:33:06,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:33:06,815 INFO L225 Difference]: With dead ends: 71 [2018-09-23 19:33:06,815 INFO L226 Difference]: Without dead ends: 69 [2018-09-23 19:33:06,815 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-23 19:33:06,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-23 19:33:06,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-23 19:33:06,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-23 19:33:06,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-09-23 19:33:06,819 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-09-23 19:33:06,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:33:06,819 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-09-23 19:33:06,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-23 19:33:06,820 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-09-23 19:33:06,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-23 19:33:06,820 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:33:06,820 INFO L375 BasicCegarLoop]: trace histogram [65, 1, 1, 1] [2018-09-23 19:33:06,820 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:33:06,820 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:33:06,821 INFO L82 PathProgramCache]: Analyzing trace with hash 906923816, now seen corresponding path program 65 times [2018-09-23 19:33:06,821 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:33:06,821 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:33:06,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:06,821 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:33:06,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:06,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:08,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:08,792 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:33:08,792 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 [2018-09-23 19:33:08,799 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:33:08,839 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-09-23 19:33:08,839 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:33:08,841 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:33:08,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:08,881 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:33:08,882 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-23 19:33:08,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-23 19:33:08,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-23 19:33:08,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-23 19:33:08,883 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 68 states. [2018-09-23 19:33:09,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:33:09,163 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-09-23 19:33:09,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-23 19:33:09,163 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 68 [2018-09-23 19:33:09,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:33:09,164 INFO L225 Difference]: With dead ends: 72 [2018-09-23 19:33:09,164 INFO L226 Difference]: Without dead ends: 70 [2018-09-23 19:33:09,165 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 [2018-09-23 19:33:09,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-23 19:33:09,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-09-23 19:33:09,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-23 19:33:09,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-09-23 19:33:09,168 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-09-23 19:33:09,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:33:09,169 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-09-23 19:33:09,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-23 19:33:09,169 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-09-23 19:33:09,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-09-23 19:33:09,169 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:33:09,169 INFO L375 BasicCegarLoop]: trace histogram [66, 1, 1, 1] [2018-09-23 19:33:09,170 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:33:09,170 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:33:09,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1950134751, now seen corresponding path program 66 times [2018-09-23 19:33:09,170 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:33:09,170 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:33:09,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:09,171 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:33:09,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:09,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:10,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:10,843 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:33:10,843 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:33:10,852 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:33:10,890 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-09-23 19:33:10,890 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:33:10,894 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:33:10,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:10,925 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:33:10,926 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-09-23 19:33:10,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-23 19:33:10,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-23 19:33:10,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-23 19:33:10,927 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 69 states. [2018-09-23 19:33:11,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:33:11,005 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-23 19:33:11,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-23 19:33:11,005 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 69 [2018-09-23 19:33:11,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:33:11,006 INFO L225 Difference]: With dead ends: 73 [2018-09-23 19:33:11,006 INFO L226 Difference]: Without dead ends: 71 [2018-09-23 19:33:11,007 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 [2018-09-23 19:33:11,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-23 19:33:11,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-23 19:33:11,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-23 19:33:11,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-09-23 19:33:11,009 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-09-23 19:33:11,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:33:11,010 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-09-23 19:33:11,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-23 19:33:11,010 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-09-23 19:33:11,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-23 19:33:11,010 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:33:11,010 INFO L375 BasicCegarLoop]: trace histogram [67, 1, 1, 1] [2018-09-23 19:33:11,011 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:33:11,011 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:33:11,011 INFO L82 PathProgramCache]: Analyzing trace with hash -324637112, now seen corresponding path program 67 times [2018-09-23 19:33:11,011 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:33:11,011 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:33:11,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:11,011 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:33:11,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:11,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:12,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:12,889 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:33:12,889 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 [2018-09-23 19:33:12,896 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:33:12,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:12,926 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:33:12,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:12,958 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:33:12,958 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-23 19:33:12,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-23 19:33:12,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-23 19:33:12,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-23 19:33:12,959 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 70 states. [2018-09-23 19:33:13,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:33:13,067 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-09-23 19:33:13,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-23 19:33:13,067 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 70 [2018-09-23 19:33:13,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:33:13,068 INFO L225 Difference]: With dead ends: 74 [2018-09-23 19:33:13,068 INFO L226 Difference]: Without dead ends: 72 [2018-09-23 19:33:13,069 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-23 19:33:13,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-09-23 19:33:13,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-09-23 19:33:13,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-09-23 19:33:13,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-09-23 19:33:13,071 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-09-23 19:33:13,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:33:13,072 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-09-23 19:33:13,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-23 19:33:13,072 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-09-23 19:33:13,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-09-23 19:33:13,072 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:33:13,072 INFO L375 BasicCegarLoop]: trace histogram [68, 1, 1, 1] [2018-09-23 19:33:13,072 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:33:13,072 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:33:13,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1473817855, now seen corresponding path program 68 times [2018-09-23 19:33:13,073 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:33:13,073 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:33:13,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:13,074 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:33:13,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:13,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:14,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:14,938 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:33:14,938 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 [2018-09-23 19:33:14,945 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:33:14,974 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:33:14,975 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:33:14,977 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:33:14,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:15,009 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:33:15,010 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-23 19:33:15,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-23 19:33:15,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-23 19:33:15,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-23 19:33:15,011 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 71 states. [2018-09-23 19:33:15,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:33:15,180 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-09-23 19:33:15,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-23 19:33:15,180 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 71 [2018-09-23 19:33:15,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:33:15,181 INFO L225 Difference]: With dead ends: 75 [2018-09-23 19:33:15,181 INFO L226 Difference]: Without dead ends: 73 [2018-09-23 19:33:15,182 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 [2018-09-23 19:33:15,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-23 19:33:15,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-23 19:33:15,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-23 19:33:15,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-09-23 19:33:15,184 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2018-09-23 19:33:15,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:33:15,184 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-09-23 19:33:15,184 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-23 19:33:15,184 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-09-23 19:33:15,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-23 19:33:15,185 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:33:15,185 INFO L375 BasicCegarLoop]: trace histogram [69, 1, 1, 1] [2018-09-23 19:33:15,185 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:33:15,185 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:33:15,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1556284776, now seen corresponding path program 69 times [2018-09-23 19:33:15,186 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:33:15,186 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:33:15,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:15,186 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:33:15,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:15,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:16,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:16,943 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:33:16,943 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:33:16,950 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:33:17,021 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-09-23 19:33:17,022 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:33:17,024 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:33:17,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:17,069 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:33:17,070 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-23 19:33:17,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-23 19:33:17,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-23 19:33:17,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-23 19:33:17,071 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 72 states. [2018-09-23 19:33:17,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:33:17,353 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-09-23 19:33:17,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-23 19:33:17,354 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 72 [2018-09-23 19:33:17,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:33:17,355 INFO L225 Difference]: With dead ends: 76 [2018-09-23 19:33:17,355 INFO L226 Difference]: Without dead ends: 74 [2018-09-23 19:33:17,356 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-23 19:33:17,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-23 19:33:17,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-09-23 19:33:17,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-23 19:33:17,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-09-23 19:33:17,359 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2018-09-23 19:33:17,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:33:17,359 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-09-23 19:33:17,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-23 19:33:17,360 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-09-23 19:33:17,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-09-23 19:33:17,360 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:33:17,360 INFO L375 BasicCegarLoop]: trace histogram [70, 1, 1, 1] [2018-09-23 19:33:17,360 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:33:17,361 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:33:17,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1000185825, now seen corresponding path program 70 times [2018-09-23 19:33:17,361 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:33:17,361 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:33:17,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:17,362 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:33:17,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:17,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:19,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:19,455 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:33:19,455 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:33:19,463 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:33:19,516 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:33:19,517 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:33:19,520 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:33:19,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:19,553 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:33:19,553 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-09-23 19:33:19,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-23 19:33:19,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-23 19:33:19,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-23 19:33:19,554 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 73 states. [2018-09-23 19:33:19,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:33:19,736 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-23 19:33:19,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-23 19:33:19,736 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 73 [2018-09-23 19:33:19,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:33:19,737 INFO L225 Difference]: With dead ends: 77 [2018-09-23 19:33:19,737 INFO L226 Difference]: Without dead ends: 75 [2018-09-23 19:33:19,737 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-23 19:33:19,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-23 19:33:19,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-23 19:33:19,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-23 19:33:19,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-09-23 19:33:19,741 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2018-09-23 19:33:19,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:33:19,741 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-09-23 19:33:19,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-23 19:33:19,741 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-09-23 19:33:19,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-23 19:33:19,742 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:33:19,742 INFO L375 BasicCegarLoop]: trace histogram [71, 1, 1, 1] [2018-09-23 19:33:19,742 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:33:19,742 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:33:19,742 INFO L82 PathProgramCache]: Analyzing trace with hash 940987528, now seen corresponding path program 71 times [2018-09-23 19:33:19,742 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:33:19,743 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:33:19,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:19,743 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:33:19,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:19,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:22,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:22,281 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:33:22,281 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 [2018-09-23 19:33:22,289 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:33:22,332 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-09-23 19:33:22,333 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:33:22,335 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:33:22,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:22,381 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:33:22,382 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-23 19:33:22,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-23 19:33:22,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-23 19:33:22,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-23 19:33:22,383 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 74 states. [2018-09-23 19:33:22,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:33:22,520 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-09-23 19:33:22,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-23 19:33:22,521 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 74 [2018-09-23 19:33:22,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:33:22,523 INFO L225 Difference]: With dead ends: 78 [2018-09-23 19:33:22,523 INFO L226 Difference]: Without dead ends: 76 [2018-09-23 19:33:22,524 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-23 19:33:22,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-09-23 19:33:22,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-09-23 19:33:22,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-23 19:33:22,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-09-23 19:33:22,527 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2018-09-23 19:33:22,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:33:22,527 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-09-23 19:33:22,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-23 19:33:22,527 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-09-23 19:33:22,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-09-23 19:33:22,528 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:33:22,528 INFO L375 BasicCegarLoop]: trace histogram [72, 1, 1, 1] [2018-09-23 19:33:22,528 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:33:22,528 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:33:22,528 INFO L82 PathProgramCache]: Analyzing trace with hash -894159679, now seen corresponding path program 72 times [2018-09-23 19:33:22,529 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:33:22,529 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:33:22,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:22,530 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:33:22,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:22,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:24,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:24,781 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:33:24,781 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 [2018-09-23 19:33:24,788 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:33:24,829 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-23 19:33:24,830 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:33:24,832 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:33:24,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:24,875 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:33:24,876 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-09-23 19:33:24,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-23 19:33:24,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-23 19:33:24,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-23 19:33:24,877 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 75 states. [2018-09-23 19:33:24,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:33:24,975 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-09-23 19:33:24,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-23 19:33:24,976 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 75 [2018-09-23 19:33:24,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:33:24,976 INFO L225 Difference]: With dead ends: 79 [2018-09-23 19:33:24,977 INFO L226 Difference]: Without dead ends: 77 [2018-09-23 19:33:24,977 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-23 19:33:24,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-23 19:33:24,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-23 19:33:24,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-23 19:33:24,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-09-23 19:33:24,980 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2018-09-23 19:33:24,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:33:24,980 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-09-23 19:33:24,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-23 19:33:24,980 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-09-23 19:33:24,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-23 19:33:24,981 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:33:24,981 INFO L375 BasicCegarLoop]: trace histogram [73, 1, 1, 1] [2018-09-23 19:33:24,981 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:33:24,981 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:33:24,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1949148248, now seen corresponding path program 73 times [2018-09-23 19:33:24,981 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:33:24,982 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:33:24,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:24,982 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:33:24,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:24,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:27,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:27,816 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:33:27,816 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:33:27,824 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:33:27,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:27,857 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:33:27,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:27,894 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:33:27,894 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-23 19:33:27,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-23 19:33:27,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-23 19:33:27,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-23 19:33:27,896 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 76 states. [2018-09-23 19:33:28,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:33:28,082 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-09-23 19:33:28,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-23 19:33:28,082 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 76 [2018-09-23 19:33:28,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:33:28,083 INFO L225 Difference]: With dead ends: 80 [2018-09-23 19:33:28,083 INFO L226 Difference]: Without dead ends: 78 [2018-09-23 19:33:28,083 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-23 19:33:28,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-09-23 19:33:28,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-09-23 19:33:28,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-09-23 19:33:28,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-09-23 19:33:28,086 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2018-09-23 19:33:28,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:33:28,086 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-09-23 19:33:28,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-23 19:33:28,086 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-09-23 19:33:28,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-09-23 19:33:28,086 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:33:28,087 INFO L375 BasicCegarLoop]: trace histogram [74, 1, 1, 1] [2018-09-23 19:33:28,087 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:33:28,087 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:33:28,087 INFO L82 PathProgramCache]: Analyzing trace with hash -294055519, now seen corresponding path program 74 times [2018-09-23 19:33:28,087 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:33:28,087 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:33:28,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:28,088 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:33:28,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:28,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:30,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:30,212 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:33:30,212 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:33:30,220 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:33:30,251 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:33:30,251 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:33:30,254 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:33:30,266 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:30,286 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:33:30,286 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-09-23 19:33:30,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-23 19:33:30,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-23 19:33:30,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-23 19:33:30,287 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 77 states. [2018-09-23 19:33:30,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:33:30,441 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-09-23 19:33:30,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-23 19:33:30,441 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 77 [2018-09-23 19:33:30,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:33:30,442 INFO L225 Difference]: With dead ends: 81 [2018-09-23 19:33:30,442 INFO L226 Difference]: Without dead ends: 79 [2018-09-23 19:33:30,443 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 [2018-09-23 19:33:30,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-23 19:33:30,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-23 19:33:30,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-23 19:33:30,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-09-23 19:33:30,446 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2018-09-23 19:33:30,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:33:30,446 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-09-23 19:33:30,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-23 19:33:30,446 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-09-23 19:33:30,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-23 19:33:30,447 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:33:30,447 INFO L375 BasicCegarLoop]: trace histogram [75, 1, 1, 1] [2018-09-23 19:33:30,447 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:33:30,447 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:33:30,447 INFO L82 PathProgramCache]: Analyzing trace with hash -525788472, now seen corresponding path program 75 times [2018-09-23 19:33:30,447 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:33:30,447 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:33:30,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:30,448 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:33:30,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:30,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:33,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:33,099 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:33:33,100 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 [2018-09-23 19:33:33,107 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:33:33,161 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-09-23 19:33:33,162 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:33:33,164 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:33:33,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:33,198 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:33:33,198 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-09-23 19:33:33,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-23 19:33:33,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-23 19:33:33,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-23 19:33:33,199 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 78 states. [2018-09-23 19:33:33,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:33:33,455 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-09-23 19:33:33,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-23 19:33:33,456 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 78 [2018-09-23 19:33:33,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:33:33,456 INFO L225 Difference]: With dead ends: 82 [2018-09-23 19:33:33,456 INFO L226 Difference]: Without dead ends: 80 [2018-09-23 19:33:33,457 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-23 19:33:33,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-23 19:33:33,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-09-23 19:33:33,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-23 19:33:33,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-09-23 19:33:33,459 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2018-09-23 19:33:33,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:33:33,460 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-09-23 19:33:33,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-23 19:33:33,460 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-09-23 19:33:33,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-09-23 19:33:33,460 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:33:33,460 INFO L375 BasicCegarLoop]: trace histogram [76, 1, 1, 1] [2018-09-23 19:33:33,461 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:33:33,461 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:33:33,461 INFO L82 PathProgramCache]: Analyzing trace with hash 880424577, now seen corresponding path program 76 times [2018-09-23 19:33:33,461 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:33:33,461 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:33:33,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:33,462 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:33:33,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:33,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:35,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:35,525 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:33:35,525 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:33:35,532 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:33:35,582 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:33:35,583 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:33:35,586 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:33:35,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:35,635 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:33:35,635 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-09-23 19:33:35,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-23 19:33:35,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-23 19:33:35,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-23 19:33:35,637 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 79 states. [2018-09-23 19:33:36,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:33:36,469 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-09-23 19:33:36,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-23 19:33:36,470 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 79 [2018-09-23 19:33:36,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:33:36,471 INFO L225 Difference]: With dead ends: 83 [2018-09-23 19:33:36,471 INFO L226 Difference]: Without dead ends: 81 [2018-09-23 19:33:36,471 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-23 19:33:36,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-23 19:33:36,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-23 19:33:36,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-23 19:33:36,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-09-23 19:33:36,474 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2018-09-23 19:33:36,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:33:36,474 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-09-23 19:33:36,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-23 19:33:36,474 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-09-23 19:33:36,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-23 19:33:36,475 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:33:36,475 INFO L375 BasicCegarLoop]: trace histogram [77, 1, 1, 1] [2018-09-23 19:33:36,475 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:33:36,475 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:33:36,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1523356136, now seen corresponding path program 77 times [2018-09-23 19:33:36,476 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:33:36,476 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:33:36,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:36,476 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:33:36,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:36,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:40,226 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:40,226 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:33:40,226 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 [2018-09-23 19:33:40,233 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:33:40,327 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-09-23 19:33:40,327 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:33:40,331 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:33:40,344 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:40,365 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:33:40,365 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-09-23 19:33:40,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-23 19:33:40,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-23 19:33:40,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-23 19:33:40,366 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 80 states. [2018-09-23 19:33:40,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:33:40,490 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2018-09-23 19:33:40,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-23 19:33:40,490 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 80 [2018-09-23 19:33:40,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:33:40,491 INFO L225 Difference]: With dead ends: 84 [2018-09-23 19:33:40,491 INFO L226 Difference]: Without dead ends: 82 [2018-09-23 19:33:40,492 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-23 19:33:40,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-23 19:33:40,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-09-23 19:33:40,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-09-23 19:33:40,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-09-23 19:33:40,495 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2018-09-23 19:33:40,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:33:40,495 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-09-23 19:33:40,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-23 19:33:40,495 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-09-23 19:33:40,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-09-23 19:33:40,496 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:33:40,496 INFO L375 BasicCegarLoop]: trace histogram [78, 1, 1, 1] [2018-09-23 19:33:40,496 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:33:40,496 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:33:40,497 INFO L82 PathProgramCache]: Analyzing trace with hash -20602015, now seen corresponding path program 78 times [2018-09-23 19:33:40,497 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:33:40,497 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:33:40,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:40,498 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:33:40,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:40,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:42,764 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:42,765 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:33:42,765 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:33:42,771 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:33:42,821 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2018-09-23 19:33:42,821 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:33:42,823 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:33:42,844 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:42,877 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:33:42,877 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-09-23 19:33:42,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-23 19:33:42,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-23 19:33:42,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-23 19:33:42,879 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 81 states. [2018-09-23 19:33:43,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:33:43,131 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-09-23 19:33:43,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-23 19:33:43,131 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 81 [2018-09-23 19:33:43,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:33:43,132 INFO L225 Difference]: With dead ends: 85 [2018-09-23 19:33:43,132 INFO L226 Difference]: Without dead ends: 83 [2018-09-23 19:33:43,133 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-23 19:33:43,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-23 19:33:43,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-23 19:33:43,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-23 19:33:43,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-09-23 19:33:43,137 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2018-09-23 19:33:43,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:33:43,137 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-09-23 19:33:43,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-23 19:33:43,137 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-09-23 19:33:43,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-23 19:33:43,137 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:33:43,137 INFO L375 BasicCegarLoop]: trace histogram [79, 1, 1, 1] [2018-09-23 19:33:43,137 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:33:43,138 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:33:43,138 INFO L82 PathProgramCache]: Analyzing trace with hash -638664440, now seen corresponding path program 79 times [2018-09-23 19:33:43,138 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:33:43,138 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:33:43,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:43,138 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:33:43,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:43,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:45,690 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:45,690 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:33:45,691 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:33:45,698 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:33:45,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:45,734 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:33:45,751 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:45,771 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:33:45,771 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-09-23 19:33:45,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-23 19:33:45,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-23 19:33:45,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-23 19:33:45,772 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 82 states. [2018-09-23 19:33:45,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:33:45,916 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-09-23 19:33:45,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-23 19:33:45,917 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 82 [2018-09-23 19:33:45,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:33:45,918 INFO L225 Difference]: With dead ends: 86 [2018-09-23 19:33:45,918 INFO L226 Difference]: Without dead ends: 84 [2018-09-23 19:33:45,918 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 [2018-09-23 19:33:45,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-09-23 19:33:45,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-09-23 19:33:45,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-09-23 19:33:45,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-09-23 19:33:45,920 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2018-09-23 19:33:45,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:33:45,921 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-09-23 19:33:45,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-23 19:33:45,921 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-09-23 19:33:45,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-23 19:33:45,921 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:33:45,921 INFO L375 BasicCegarLoop]: trace histogram [80, 1, 1, 1] [2018-09-23 19:33:45,921 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:33:45,921 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:33:45,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1676236865, now seen corresponding path program 80 times [2018-09-23 19:33:45,922 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:33:45,922 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:33:45,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:45,922 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:33:45,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:45,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:48,640 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:48,640 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:33:48,640 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:33:48,647 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:33:48,679 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:33:48,679 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:33:48,682 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:33:48,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:48,731 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:33:48,731 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-09-23 19:33:48,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-23 19:33:48,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-23 19:33:48,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-23 19:33:48,732 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 83 states. [2018-09-23 19:33:50,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:33:50,625 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-09-23 19:33:50,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-23 19:33:50,625 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 83 [2018-09-23 19:33:50,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:33:50,625 INFO L225 Difference]: With dead ends: 87 [2018-09-23 19:33:50,626 INFO L226 Difference]: Without dead ends: 85 [2018-09-23 19:33:50,626 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-23 19:33:50,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-23 19:33:50,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-23 19:33:50,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-23 19:33:50,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-09-23 19:33:50,628 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2018-09-23 19:33:50,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:33:50,628 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-09-23 19:33:50,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-23 19:33:50,628 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-09-23 19:33:50,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-23 19:33:50,629 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:33:50,629 INFO L375 BasicCegarLoop]: trace histogram [81, 1, 1, 1] [2018-09-23 19:33:50,629 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:33:50,630 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:33:50,630 INFO L82 PathProgramCache]: Analyzing trace with hash 423733288, now seen corresponding path program 81 times [2018-09-23 19:33:50,630 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:33:50,630 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:33:50,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:50,631 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:33:50,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:50,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:53,010 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:53,011 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:33:53,011 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 [2018-09-23 19:33:53,018 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:33:53,071 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-09-23 19:33:53,071 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:33:53,074 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:33:53,090 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:53,110 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:33:53,111 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-09-23 19:33:53,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-23 19:33:53,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-23 19:33:53,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-23 19:33:53,112 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 84 states. [2018-09-23 19:33:53,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:33:53,294 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-09-23 19:33:53,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-23 19:33:53,294 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 84 [2018-09-23 19:33:53,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:33:53,295 INFO L225 Difference]: With dead ends: 88 [2018-09-23 19:33:53,295 INFO L226 Difference]: Without dead ends: 86 [2018-09-23 19:33:53,296 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-23 19:33:53,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-09-23 19:33:53,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-09-23 19:33:53,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-09-23 19:33:53,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-09-23 19:33:53,299 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2018-09-23 19:33:53,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:33:53,299 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-09-23 19:33:53,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-23 19:33:53,299 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-09-23 19:33:53,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-09-23 19:33:53,300 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:33:53,300 INFO L375 BasicCegarLoop]: trace histogram [82, 1, 1, 1] [2018-09-23 19:33:53,300 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:33:53,300 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:33:53,300 INFO L82 PathProgramCache]: Analyzing trace with hash 250828065, now seen corresponding path program 82 times [2018-09-23 19:33:53,300 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:33:53,300 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:33:53,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:53,301 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:33:53,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:53,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:56,086 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:56,087 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:33:56,087 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:33:56,095 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:33:56,127 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:33:56,127 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:33:56,131 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:33:56,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:56,186 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:33:56,186 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-09-23 19:33:56,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-09-23 19:33:56,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-09-23 19:33:56,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-23 19:33:56,188 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 85 states. [2018-09-23 19:33:57,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:33:57,603 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-09-23 19:33:57,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-23 19:33:57,603 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 85 [2018-09-23 19:33:57,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:33:57,604 INFO L225 Difference]: With dead ends: 89 [2018-09-23 19:33:57,604 INFO L226 Difference]: Without dead ends: 87 [2018-09-23 19:33:57,605 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 [2018-09-23 19:33:57,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-23 19:33:57,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-09-23 19:33:57,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-23 19:33:57,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-09-23 19:33:57,607 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2018-09-23 19:33:57,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:33:57,608 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-09-23 19:33:57,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-09-23 19:33:57,608 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-09-23 19:33:57,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-23 19:33:57,608 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:33:57,608 INFO L375 BasicCegarLoop]: trace histogram [83, 1, 1, 1] [2018-09-23 19:33:57,609 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:33:57,609 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:33:57,609 INFO L82 PathProgramCache]: Analyzing trace with hash -814266552, now seen corresponding path program 83 times [2018-09-23 19:33:57,609 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:33:57,609 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:33:57,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:57,610 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:33:57,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:57,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:00,498 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:34:00,498 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:34:00,498 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 [2018-09-23 19:34:00,506 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:34:00,559 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-09-23 19:34:00,560 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:34:00,563 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:34:00,577 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:34:00,597 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:34:00,597 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-09-23 19:34:00,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-23 19:34:00,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-23 19:34:00,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-23 19:34:00,598 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 86 states. [2018-09-23 19:34:00,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:34:00,788 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2018-09-23 19:34:00,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-23 19:34:00,789 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 86 [2018-09-23 19:34:00,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:34:00,789 INFO L225 Difference]: With dead ends: 90 [2018-09-23 19:34:00,790 INFO L226 Difference]: Without dead ends: 88 [2018-09-23 19:34:00,790 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-23 19:34:00,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-09-23 19:34:00,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-09-23 19:34:00,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-09-23 19:34:00,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-09-23 19:34:00,793 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2018-09-23 19:34:00,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:34:00,793 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-09-23 19:34:00,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-23 19:34:00,793 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-09-23 19:34:00,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-09-23 19:34:00,794 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:34:00,794 INFO L375 BasicCegarLoop]: trace histogram [84, 1, 1, 1] [2018-09-23 19:34:00,794 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:34:00,794 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:34:00,794 INFO L82 PathProgramCache]: Analyzing trace with hash 527538689, now seen corresponding path program 84 times [2018-09-23 19:34:00,794 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:34:00,794 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:34:00,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:00,795 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:34:00,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:00,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:03,330 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:34:03,330 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:34:03,330 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:34:03,339 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:34:03,392 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-23 19:34:03,392 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:34:03,395 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:34:03,412 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:34:03,439 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:34:03,439 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-09-23 19:34:03,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-09-23 19:34:03,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-09-23 19:34:03,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-23 19:34:03,441 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 87 states. [2018-09-23 19:34:03,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:34:03,621 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-09-23 19:34:03,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-23 19:34:03,622 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 87 [2018-09-23 19:34:03,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:34:03,623 INFO L225 Difference]: With dead ends: 91 [2018-09-23 19:34:03,623 INFO L226 Difference]: Without dead ends: 89 [2018-09-23 19:34:03,623 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-23 19:34:03,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-23 19:34:03,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-09-23 19:34:03,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-23 19:34:03,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-09-23 19:34:03,626 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2018-09-23 19:34:03,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:34:03,627 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-09-23 19:34:03,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-09-23 19:34:03,627 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-09-23 19:34:03,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-23 19:34:03,627 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:34:03,628 INFO L375 BasicCegarLoop]: trace histogram [85, 1, 1, 1] [2018-09-23 19:34:03,628 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:34:03,628 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:34:03,628 INFO L82 PathProgramCache]: Analyzing trace with hash -826171800, now seen corresponding path program 85 times [2018-09-23 19:34:03,628 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:34:03,628 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:34:03,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:03,629 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:34:03,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:03,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:06,546 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:34:06,546 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:34:06,546 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 [2018-09-23 19:34:06,554 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:34:06,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:06,591 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:34:06,606 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:34:06,627 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:34:06,627 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-09-23 19:34:06,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-23 19:34:06,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-23 19:34:06,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-23 19:34:06,629 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 88 states. [2018-09-23 19:34:06,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:34:06,770 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2018-09-23 19:34:06,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-23 19:34:06,770 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 88 [2018-09-23 19:34:06,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:34:06,771 INFO L225 Difference]: With dead ends: 92 [2018-09-23 19:34:06,771 INFO L226 Difference]: Without dead ends: 90 [2018-09-23 19:34:06,772 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-23 19:34:06,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-09-23 19:34:06,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-09-23 19:34:06,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-09-23 19:34:06,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-09-23 19:34:06,775 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2018-09-23 19:34:06,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:34:06,775 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-09-23 19:34:06,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-23 19:34:06,775 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-09-23 19:34:06,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-09-23 19:34:06,776 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:34:06,776 INFO L375 BasicCegarLoop]: trace histogram [86, 1, 1, 1] [2018-09-23 19:34:06,776 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:34:06,777 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:34:06,777 INFO L82 PathProgramCache]: Analyzing trace with hash 158476001, now seen corresponding path program 86 times [2018-09-23 19:34:06,777 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:34:06,777 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:34:06,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:06,778 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:34:06,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:06,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:09,743 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:34:09,743 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:34:09,743 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 [2018-09-23 19:34:09,752 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:34:09,789 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:34:09,789 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:34:09,791 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:34:09,806 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:34:09,825 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:34:09,826 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-09-23 19:34:09,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-23 19:34:09,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-23 19:34:09,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-23 19:34:09,827 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 89 states. [2018-09-23 19:34:10,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:34:10,016 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-09-23 19:34:10,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-23 19:34:10,017 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 89 [2018-09-23 19:34:10,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:34:10,017 INFO L225 Difference]: With dead ends: 93 [2018-09-23 19:34:10,017 INFO L226 Difference]: Without dead ends: 91 [2018-09-23 19:34:10,018 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-23 19:34:10,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-23 19:34:10,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-23 19:34:10,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-23 19:34:10,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-09-23 19:34:10,020 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2018-09-23 19:34:10,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:34:10,021 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-09-23 19:34:10,021 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-23 19:34:10,021 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-09-23 19:34:10,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-23 19:34:10,021 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:34:10,021 INFO L375 BasicCegarLoop]: trace histogram [87, 1, 1, 1] [2018-09-23 19:34:10,021 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:34:10,021 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:34:10,022 INFO L82 PathProgramCache]: Analyzing trace with hash 617786760, now seen corresponding path program 87 times [2018-09-23 19:34:10,022 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:34:10,022 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:34:10,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:10,022 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:34:10,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:10,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:12,826 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:34:12,826 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:34:12,826 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 [2018-09-23 19:34:12,836 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:34:12,895 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-09-23 19:34:12,895 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:34:12,898 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:34:12,914 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:34:12,934 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:34:12,935 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-09-23 19:34:12,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-23 19:34:12,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-23 19:34:12,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-23 19:34:12,936 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 90 states. [2018-09-23 19:34:13,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:34:13,133 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-09-23 19:34:13,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-23 19:34:13,133 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 90 [2018-09-23 19:34:13,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:34:13,134 INFO L225 Difference]: With dead ends: 94 [2018-09-23 19:34:13,135 INFO L226 Difference]: Without dead ends: 92 [2018-09-23 19:34:13,135 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-23 19:34:13,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-09-23 19:34:13,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-09-23 19:34:13,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-09-23 19:34:13,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-09-23 19:34:13,138 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2018-09-23 19:34:13,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:34:13,138 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-09-23 19:34:13,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-23 19:34:13,139 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-09-23 19:34:13,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-09-23 19:34:13,139 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:34:13,139 INFO L375 BasicCegarLoop]: trace histogram [88, 1, 1, 1] [2018-09-23 19:34:13,139 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:34:13,140 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:34:13,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1971518401, now seen corresponding path program 88 times [2018-09-23 19:34:13,140 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:34:13,140 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:34:13,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:13,141 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:34:13,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:13,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:16,178 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:34:16,179 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:34:16,179 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 [2018-09-23 19:34:16,186 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:34:16,224 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:34:16,224 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:34:16,227 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:34:16,263 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:34:16,290 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:34:16,290 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-09-23 19:34:16,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-09-23 19:34:16,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-09-23 19:34:16,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-23 19:34:16,291 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 91 states. [2018-09-23 19:34:16,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:34:16,423 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-09-23 19:34:16,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-23 19:34:16,424 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 91 [2018-09-23 19:34:16,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:34:16,425 INFO L225 Difference]: With dead ends: 95 [2018-09-23 19:34:16,425 INFO L226 Difference]: Without dead ends: 93 [2018-09-23 19:34:16,425 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-23 19:34:16,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-23 19:34:16,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-23 19:34:16,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-23 19:34:16,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-09-23 19:34:16,429 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2018-09-23 19:34:16,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:34:16,430 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-09-23 19:34:16,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-09-23 19:34:16,430 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-09-23 19:34:16,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-23 19:34:16,430 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:34:16,431 INFO L375 BasicCegarLoop]: trace histogram [89, 1, 1, 1] [2018-09-23 19:34:16,431 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:34:16,431 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:34:16,431 INFO L82 PathProgramCache]: Analyzing trace with hash 987526312, now seen corresponding path program 89 times [2018-09-23 19:34:16,431 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:34:16,432 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:34:16,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:16,432 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:34:16,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:16,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:19,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:34:19,927 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:34:19,927 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 [2018-09-23 19:34:19,936 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:34:20,049 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-09-23 19:34:20,050 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:34:20,053 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:34:20,075 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:34:20,107 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:34:20,107 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-09-23 19:34:20,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-23 19:34:20,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-23 19:34:20,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-23 19:34:20,109 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 92 states. [2018-09-23 19:34:20,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:34:20,368 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2018-09-23 19:34:20,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-23 19:34:20,369 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 92 [2018-09-23 19:34:20,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:34:20,370 INFO L225 Difference]: With dead ends: 96 [2018-09-23 19:34:20,370 INFO L226 Difference]: Without dead ends: 94 [2018-09-23 19:34:20,370 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-23 19:34:20,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-09-23 19:34:20,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-09-23 19:34:20,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-09-23 19:34:20,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-09-23 19:34:20,373 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2018-09-23 19:34:20,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:34:20,374 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-09-23 19:34:20,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-23 19:34:20,374 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-09-23 19:34:20,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-09-23 19:34:20,374 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:34:20,374 INFO L375 BasicCegarLoop]: trace histogram [90, 1, 1, 1] [2018-09-23 19:34:20,375 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:34:20,375 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:34:20,375 INFO L82 PathProgramCache]: Analyzing trace with hash 548542625, now seen corresponding path program 90 times [2018-09-23 19:34:20,375 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:34:20,375 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:34:20,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:20,376 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:34:20,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:20,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:23,375 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:34:23,375 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:34:23,375 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 [2018-09-23 19:34:23,382 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:34:23,441 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2018-09-23 19:34:23,441 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:34:23,443 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:34:23,460 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:34:23,480 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:34:23,480 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-09-23 19:34:23,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-09-23 19:34:23,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-09-23 19:34:23,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-23 19:34:23,481 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 93 states. [2018-09-23 19:34:23,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:34:23,704 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-09-23 19:34:23,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-23 19:34:23,704 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 93 [2018-09-23 19:34:23,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:34:23,705 INFO L225 Difference]: With dead ends: 97 [2018-09-23 19:34:23,705 INFO L226 Difference]: Without dead ends: 95 [2018-09-23 19:34:23,706 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-23 19:34:23,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-23 19:34:23,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-23 19:34:23,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-23 19:34:23,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-09-23 19:34:23,709 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2018-09-23 19:34:23,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:34:23,709 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-09-23 19:34:23,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-09-23 19:34:23,709 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-09-23 19:34:23,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-23 19:34:23,710 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:34:23,710 INFO L375 BasicCegarLoop]: trace histogram [91, 1, 1, 1] [2018-09-23 19:34:23,710 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:34:23,710 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:34:23,711 INFO L82 PathProgramCache]: Analyzing trace with hash -175049784, now seen corresponding path program 91 times [2018-09-23 19:34:23,711 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:34:23,711 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:34:23,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:23,711 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:34:23,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:23,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:26,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:34:26,911 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:34:26,911 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:34:26,919 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:34:26,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:26,960 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:34:26,976 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:34:26,995 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:34:26,996 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-09-23 19:34:26,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-23 19:34:26,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-23 19:34:26,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-23 19:34:26,997 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 94 states. [2018-09-23 19:34:27,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:34:27,204 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-09-23 19:34:27,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-23 19:34:27,205 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 94 [2018-09-23 19:34:27,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:34:27,206 INFO L225 Difference]: With dead ends: 98 [2018-09-23 19:34:27,206 INFO L226 Difference]: Without dead ends: 96 [2018-09-23 19:34:27,207 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-23 19:34:27,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-09-23 19:34:27,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-09-23 19:34:27,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-09-23 19:34:27,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-09-23 19:34:27,210 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2018-09-23 19:34:27,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:34:27,210 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-09-23 19:34:27,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-23 19:34:27,210 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-09-23 19:34:27,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-09-23 19:34:27,211 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:34:27,211 INFO L375 BasicCegarLoop]: trace histogram [92, 1, 1, 1] [2018-09-23 19:34:27,211 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:34:27,211 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:34:27,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1131577983, now seen corresponding path program 92 times [2018-09-23 19:34:27,212 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:34:27,212 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:34:27,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:27,212 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:34:27,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:27,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:31,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:34:31,081 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:34:31,081 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:34:31,089 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:34:31,128 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:34:31,128 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:34:31,131 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:34:31,151 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:34:31,174 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:34:31,174 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-09-23 19:34:31,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-09-23 19:34:31,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-09-23 19:34:31,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-23 19:34:31,175 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 95 states. [2018-09-23 19:34:31,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:34:31,358 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-09-23 19:34:31,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-23 19:34:31,359 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 95 [2018-09-23 19:34:31,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:34:31,360 INFO L225 Difference]: With dead ends: 99 [2018-09-23 19:34:31,360 INFO L226 Difference]: Without dead ends: 97 [2018-09-23 19:34:31,360 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-23 19:34:31,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-23 19:34:31,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-23 19:34:31,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-23 19:34:31,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-09-23 19:34:31,363 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2018-09-23 19:34:31,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:34:31,364 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-09-23 19:34:31,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-09-23 19:34:31,364 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-09-23 19:34:31,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-23 19:34:31,364 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:34:31,364 INFO L375 BasicCegarLoop]: trace histogram [93, 1, 1, 1] [2018-09-23 19:34:31,364 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:34:31,365 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:34:31,365 INFO L82 PathProgramCache]: Analyzing trace with hash -719181080, now seen corresponding path program 93 times [2018-09-23 19:34:31,365 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:34:31,365 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:34:31,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:31,366 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:34:31,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:31,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:34,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:34:34,445 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:34:34,445 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:34:34,452 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:34:34,520 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-09-23 19:34:34,520 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:34:34,523 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:34:34,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:34:34,577 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:34:34,577 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-09-23 19:34:34,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-23 19:34:34,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-23 19:34:34,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-23 19:34:34,580 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 96 states. [2018-09-23 19:34:34,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:34:34,880 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2018-09-23 19:34:34,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-23 19:34:34,880 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 96 [2018-09-23 19:34:34,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:34:34,881 INFO L225 Difference]: With dead ends: 100 [2018-09-23 19:34:34,881 INFO L226 Difference]: Without dead ends: 98 [2018-09-23 19:34:34,881 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-23 19:34:34,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-09-23 19:34:34,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-09-23 19:34:34,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-09-23 19:34:34,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-09-23 19:34:34,884 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2018-09-23 19:34:34,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:34:34,884 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-09-23 19:34:34,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-23 19:34:34,884 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-09-23 19:34:34,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-09-23 19:34:34,885 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:34:34,885 INFO L375 BasicCegarLoop]: trace histogram [94, 1, 1, 1] [2018-09-23 19:34:34,886 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:34:34,886 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:34:34,886 INFO L82 PathProgramCache]: Analyzing trace with hash -819778975, now seen corresponding path program 94 times [2018-09-23 19:34:34,886 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:34:34,886 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:34:34,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:34,887 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:34:34,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:34,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:38,011 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:34:38,011 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:34:38,011 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 [2018-09-23 19:34:38,020 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:34:38,060 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:34:38,061 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:34:38,063 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:34:38,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:34:38,117 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:34:38,117 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-09-23 19:34:38,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-09-23 19:34:38,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-09-23 19:34:38,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-23 19:34:38,119 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 97 states. [2018-09-23 19:34:38,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:34:38,408 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-09-23 19:34:38,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-23 19:34:38,409 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 97 [2018-09-23 19:34:38,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:34:38,410 INFO L225 Difference]: With dead ends: 101 [2018-09-23 19:34:38,410 INFO L226 Difference]: Without dead ends: 99 [2018-09-23 19:34:38,410 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-23 19:34:38,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-23 19:34:38,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-23 19:34:38,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-23 19:34:38,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-09-23 19:34:38,413 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2018-09-23 19:34:38,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:34:38,414 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-09-23 19:34:38,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-09-23 19:34:38,414 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-09-23 19:34:38,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-23 19:34:38,415 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:34:38,415 INFO L375 BasicCegarLoop]: trace histogram [95, 1, 1, 1] [2018-09-23 19:34:38,415 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:34:38,415 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:34:38,415 INFO L82 PathProgramCache]: Analyzing trace with hash 356653576, now seen corresponding path program 95 times [2018-09-23 19:34:38,415 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:34:38,416 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:34:38,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:38,416 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:34:38,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:38,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:41,940 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:34:41,941 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:34:41,941 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:34:41,957 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:34:42,021 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-09-23 19:34:42,021 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:34:42,024 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:34:42,041 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:34:42,061 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:34:42,061 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-09-23 19:34:42,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-23 19:34:42,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-23 19:34:42,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-09-23 19:34:42,063 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 98 states. [2018-09-23 19:34:42,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:34:42,829 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2018-09-23 19:34:42,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-09-23 19:34:42,830 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 98 [2018-09-23 19:34:42,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:34:42,831 INFO L225 Difference]: With dead ends: 102 [2018-09-23 19:34:42,831 INFO L226 Difference]: Without dead ends: 100 [2018-09-23 19:34:42,832 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-09-23 19:34:42,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-09-23 19:34:42,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-09-23 19:34:42,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-09-23 19:34:42,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-09-23 19:34:42,835 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2018-09-23 19:34:42,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:34:42,835 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-09-23 19:34:42,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-23 19:34:42,836 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-09-23 19:34:42,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-09-23 19:34:42,836 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:34:42,836 INFO L375 BasicCegarLoop]: trace histogram [96, 1, 1, 1] [2018-09-23 19:34:42,836 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:34:42,837 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:34:42,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1828643007, now seen corresponding path program 96 times [2018-09-23 19:34:42,837 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:34:42,837 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:34:42,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:42,837 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:34:42,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:42,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:46,437 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:34:46,437 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:34:46,437 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 [2018-09-23 19:34:46,445 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:34:46,510 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-23 19:34:46,510 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:34:46,513 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:34:46,529 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:34:46,550 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:34:46,550 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-09-23 19:34:46,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-09-23 19:34:46,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-09-23 19:34:46,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-09-23 19:34:46,551 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 99 states. [2018-09-23 19:34:46,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:34:46,796 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-09-23 19:34:46,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-09-23 19:34:46,796 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 99 [2018-09-23 19:34:46,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:34:46,797 INFO L225 Difference]: With dead ends: 103 [2018-09-23 19:34:46,797 INFO L226 Difference]: Without dead ends: 101 [2018-09-23 19:34:46,798 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 [2018-09-23 19:34:46,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-23 19:34:46,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-23 19:34:46,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-23 19:34:46,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-09-23 19:34:46,801 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2018-09-23 19:34:46,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:34:46,801 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-09-23 19:34:46,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-09-23 19:34:46,801 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-09-23 19:34:46,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-23 19:34:46,801 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:34:46,801 INFO L375 BasicCegarLoop]: trace histogram [97, 1, 1, 1] [2018-09-23 19:34:46,802 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:34:46,802 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:34:46,802 INFO L82 PathProgramCache]: Analyzing trace with hash -853360344, now seen corresponding path program 97 times [2018-09-23 19:34:46,802 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:34:46,802 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:34:46,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:46,803 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:34:46,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:46,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:50,508 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:34:50,509 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:34:50,509 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 [2018-09-23 19:34:50,515 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:34:50,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:50,557 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:34:50,573 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:34:50,594 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:34:50,594 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-09-23 19:34:50,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-23 19:34:50,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-23 19:34:50,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-09-23 19:34:50,595 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 100 states. [2018-09-23 19:34:50,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:34:50,845 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2018-09-23 19:34:50,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-09-23 19:34:50,845 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 100 [2018-09-23 19:34:50,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:34:50,846 INFO L225 Difference]: With dead ends: 104 [2018-09-23 19:34:50,846 INFO L226 Difference]: Without dead ends: 102 [2018-09-23 19:34:50,847 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-09-23 19:34:50,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-09-23 19:34:50,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-09-23 19:34:50,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-09-23 19:34:50,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-09-23 19:34:50,850 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2018-09-23 19:34:50,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:34:50,850 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-09-23 19:34:50,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-23 19:34:50,850 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-09-23 19:34:50,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-09-23 19:34:50,851 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:34:50,851 INFO L375 BasicCegarLoop]: trace histogram [98, 1, 1, 1] [2018-09-23 19:34:50,851 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:34:50,851 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:34:50,851 INFO L82 PathProgramCache]: Analyzing trace with hash -684368863, now seen corresponding path program 98 times [2018-09-23 19:34:50,851 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:34:50,851 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:34:50,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:50,852 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:34:50,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:50,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:54,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:34:54,236 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:34:54,236 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 [2018-09-23 19:34:54,243 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:34:54,283 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:34:54,283 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:34:54,286 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:34:54,303 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:34:54,323 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:34:54,324 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-09-23 19:34:54,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-23 19:34:54,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-23 19:34:54,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-09-23 19:34:54,326 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 101 states. [2018-09-23 19:34:54,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:34:54,503 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-09-23 19:34:54,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-09-23 19:34:54,503 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 101 [2018-09-23 19:34:54,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:34:54,504 INFO L225 Difference]: With dead ends: 105 [2018-09-23 19:34:54,504 INFO L226 Difference]: Without dead ends: 103 [2018-09-23 19:34:54,505 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-09-23 19:34:54,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-23 19:34:54,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-23 19:34:54,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-23 19:34:54,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-09-23 19:34:54,508 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101 [2018-09-23 19:34:54,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:34:54,508 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-09-23 19:34:54,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-23 19:34:54,508 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-09-23 19:34:54,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-23 19:34:54,508 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:34:54,509 INFO L375 BasicCegarLoop]: trace histogram [99, 1, 1, 1] [2018-09-23 19:34:54,509 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:34:54,509 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:34:54,509 INFO L82 PathProgramCache]: Analyzing trace with hash 259399752, now seen corresponding path program 99 times [2018-09-23 19:34:54,509 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:34:54,509 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:34:54,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:54,510 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:34:54,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:54,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:58,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:34:58,313 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:34:58,313 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:34:58,321 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:34:58,391 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2018-09-23 19:34:58,391 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:34:58,394 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:34:58,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:34:58,431 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:34:58,431 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-09-23 19:34:58,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-23 19:34:58,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-23 19:34:58,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-09-23 19:34:58,433 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 102 states. [2018-09-23 19:34:58,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:34:58,687 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2018-09-23 19:34:58,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-09-23 19:34:58,688 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 102 [2018-09-23 19:34:58,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:34:58,689 INFO L225 Difference]: With dead ends: 106 [2018-09-23 19:34:58,689 INFO L226 Difference]: Without dead ends: 104 [2018-09-23 19:34:58,690 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-09-23 19:34:58,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-09-23 19:34:58,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-09-23 19:34:58,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-09-23 19:34:58,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-09-23 19:34:58,693 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102 [2018-09-23 19:34:58,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:34:58,693 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-09-23 19:34:58,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-23 19:34:58,693 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-09-23 19:34:58,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-09-23 19:34:58,693 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:34:58,694 INFO L375 BasicCegarLoop]: trace histogram [100, 1, 1, 1] [2018-09-23 19:34:58,694 INFO L423 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:34:58,694 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:34:58,694 INFO L82 PathProgramCache]: Analyzing trace with hash -548544255, now seen corresponding path program 100 times [2018-09-23 19:34:58,694 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:34:58,694 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:34:58,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:58,695 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:34:58,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:58,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:02,491 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:35:02,491 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:02,491 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:35:02,498 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:35:02,540 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:35:02,540 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:02,543 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:02,560 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:35:02,581 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:02,581 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-09-23 19:35:02,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-09-23 19:35:02,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-09-23 19:35:02,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-09-23 19:35:02,583 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 103 states. [2018-09-23 19:35:02,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:02,756 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-09-23 19:35:02,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-23 19:35:02,756 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 103 [2018-09-23 19:35:02,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:02,757 INFO L225 Difference]: With dead ends: 107 [2018-09-23 19:35:02,758 INFO L226 Difference]: Without dead ends: 105 [2018-09-23 19:35:02,758 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-09-23 19:35:02,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-09-23 19:35:02,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-09-23 19:35:02,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-23 19:35:02,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-09-23 19:35:02,761 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 103 [2018-09-23 19:35:02,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:02,762 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-09-23 19:35:02,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-09-23 19:35:02,762 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-09-23 19:35:02,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-23 19:35:02,762 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:02,763 INFO L375 BasicCegarLoop]: trace histogram [101, 1, 1, 1] [2018-09-23 19:35:02,763 INFO L423 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:02,763 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:02,763 INFO L82 PathProgramCache]: Analyzing trace with hash 174995304, now seen corresponding path program 101 times [2018-09-23 19:35:02,763 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:02,763 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:02,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:02,764 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:02,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:02,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:06,762 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:35:06,762 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:06,762 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 [2018-09-23 19:35:06,769 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:35:06,847 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2018-09-23 19:35:06,847 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:06,852 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:06,870 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:35:06,891 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:06,891 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-09-23 19:35:06,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-23 19:35:06,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-23 19:35:06,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-09-23 19:35:06,893 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 104 states. [2018-09-23 19:35:07,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:07,110 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2018-09-23 19:35:07,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-09-23 19:35:07,111 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 104 [2018-09-23 19:35:07,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:07,112 INFO L225 Difference]: With dead ends: 108 [2018-09-23 19:35:07,113 INFO L226 Difference]: Without dead ends: 106 [2018-09-23 19:35:07,113 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-09-23 19:35:07,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-09-23 19:35:07,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-09-23 19:35:07,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-09-23 19:35:07,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-09-23 19:35:07,116 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 104 [2018-09-23 19:35:07,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:07,117 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-09-23 19:35:07,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-23 19:35:07,117 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-09-23 19:35:07,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-09-23 19:35:07,118 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:07,118 INFO L375 BasicCegarLoop]: trace histogram [102, 1, 1, 1] [2018-09-23 19:35:07,118 INFO L423 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:07,118 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:07,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1129885153, now seen corresponding path program 102 times [2018-09-23 19:35:07,118 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:07,118 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:07,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:07,119 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:07,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:07,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:11,148 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:35:11,148 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:11,148 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:35:11,159 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:35:11,230 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2018-09-23 19:35:11,230 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:11,233 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:11,251 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:35:11,271 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:11,271 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-09-23 19:35:11,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-09-23 19:35:11,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-09-23 19:35:11,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-09-23 19:35:11,274 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 105 states. [2018-09-23 19:35:11,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:11,543 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-09-23 19:35:11,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-09-23 19:35:11,544 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 105 [2018-09-23 19:35:11,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:11,544 INFO L225 Difference]: With dead ends: 109 [2018-09-23 19:35:11,544 INFO L226 Difference]: Without dead ends: 107 [2018-09-23 19:35:11,545 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-09-23 19:35:11,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-23 19:35:11,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-09-23 19:35:11,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-23 19:35:11,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-09-23 19:35:11,547 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 105 [2018-09-23 19:35:11,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:11,548 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-09-23 19:35:11,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-09-23 19:35:11,548 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-09-23 19:35:11,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-23 19:35:11,548 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:11,549 INFO L375 BasicCegarLoop]: trace histogram [103, 1, 1, 1] [2018-09-23 19:35:11,549 INFO L423 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:11,549 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:11,549 INFO L82 PathProgramCache]: Analyzing trace with hash 666699400, now seen corresponding path program 103 times [2018-09-23 19:35:11,549 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:11,549 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:11,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:11,550 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:11,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:11,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:15,461 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:35:15,461 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:15,461 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 [2018-09-23 19:35:15,469 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:35:15,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:15,514 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:15,540 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:35:15,562 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:15,562 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-09-23 19:35:15,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-23 19:35:15,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-23 19:35:15,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-09-23 19:35:15,564 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 106 states. [2018-09-23 19:35:15,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:15,897 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2018-09-23 19:35:15,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-09-23 19:35:15,900 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 106 [2018-09-23 19:35:15,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:15,900 INFO L225 Difference]: With dead ends: 110 [2018-09-23 19:35:15,900 INFO L226 Difference]: Without dead ends: 108 [2018-09-23 19:35:15,901 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 [2018-09-23 19:35:15,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-09-23 19:35:15,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-09-23 19:35:15,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-09-23 19:35:15,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-09-23 19:35:15,904 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 106 [2018-09-23 19:35:15,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:15,904 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-09-23 19:35:15,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-23 19:35:15,904 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-09-23 19:35:15,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-09-23 19:35:15,905 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:15,905 INFO L375 BasicCegarLoop]: trace histogram [104, 1, 1, 1] [2018-09-23 19:35:15,905 INFO L423 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:15,905 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:15,905 INFO L82 PathProgramCache]: Analyzing trace with hash -807157055, now seen corresponding path program 104 times [2018-09-23 19:35:15,905 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:15,905 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:15,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:15,906 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:35:15,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:15,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:19,817 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:35:19,817 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:19,817 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 [2018-09-23 19:35:19,824 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:35:19,870 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:35:19,870 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:19,873 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:19,898 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:35:19,928 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:19,929 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106 [2018-09-23 19:35:19,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-09-23 19:35:19,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-09-23 19:35:19,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-09-23 19:35:19,931 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 107 states. [2018-09-23 19:35:20,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:20,234 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-09-23 19:35:20,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-09-23 19:35:20,234 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 107 [2018-09-23 19:35:20,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:20,235 INFO L225 Difference]: With dead ends: 111 [2018-09-23 19:35:20,235 INFO L226 Difference]: Without dead ends: 109 [2018-09-23 19:35:20,236 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-09-23 19:35:20,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-23 19:35:20,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-23 19:35:20,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-23 19:35:20,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-09-23 19:35:20,239 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 107 [2018-09-23 19:35:20,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:20,239 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-09-23 19:35:20,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-09-23 19:35:20,239 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-09-23 19:35:20,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-23 19:35:20,239 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:20,239 INFO L375 BasicCegarLoop]: trace histogram [105, 1, 1, 1] [2018-09-23 19:35:20,240 INFO L423 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:20,240 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:20,240 INFO L82 PathProgramCache]: Analyzing trace with hash 747933096, now seen corresponding path program 105 times [2018-09-23 19:35:20,240 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:20,240 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:20,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:20,241 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:20,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:20,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:24,393 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:35:24,393 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:24,393 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 [2018-09-23 19:35:24,400 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:35:24,472 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2018-09-23 19:35:24,473 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:24,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:24,494 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:35:24,515 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:24,515 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-09-23 19:35:24,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-23 19:35:24,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-23 19:35:24,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-09-23 19:35:24,517 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 108 states. [2018-09-23 19:35:24,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:24,827 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2018-09-23 19:35:24,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-09-23 19:35:24,827 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 108 [2018-09-23 19:35:24,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:24,828 INFO L225 Difference]: With dead ends: 112 [2018-09-23 19:35:24,828 INFO L226 Difference]: Without dead ends: 110 [2018-09-23 19:35:24,828 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 [2018-09-23 19:35:24,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-09-23 19:35:24,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-09-23 19:35:24,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-09-23 19:35:24,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-09-23 19:35:24,830 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 108 [2018-09-23 19:35:24,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:24,830 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-09-23 19:35:24,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-23 19:35:24,831 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-09-23 19:35:24,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-09-23 19:35:24,831 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:24,831 INFO L375 BasicCegarLoop]: trace histogram [106, 1, 1, 1] [2018-09-23 19:35:24,832 INFO L423 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:24,832 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:24,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1711087521, now seen corresponding path program 106 times [2018-09-23 19:35:24,832 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:24,832 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:24,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:24,833 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:24,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:24,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:29,229 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:35:29,229 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:29,229 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 [2018-09-23 19:35:29,236 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:35:29,282 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:35:29,282 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:29,285 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:29,305 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:35:29,326 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:29,326 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 108 [2018-09-23 19:35:29,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-09-23 19:35:29,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-09-23 19:35:29,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-09-23 19:35:29,327 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 109 states. [2018-09-23 19:35:29,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:29,636 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-09-23 19:35:29,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-09-23 19:35:29,636 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 109 [2018-09-23 19:35:29,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:29,637 INFO L225 Difference]: With dead ends: 113 [2018-09-23 19:35:29,637 INFO L226 Difference]: Without dead ends: 111 [2018-09-23 19:35:29,637 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-09-23 19:35:29,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-23 19:35:29,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-09-23 19:35:29,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-23 19:35:29,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-09-23 19:35:29,641 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 109 [2018-09-23 19:35:29,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:29,641 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-09-23 19:35:29,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-09-23 19:35:29,641 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-09-23 19:35:29,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-23 19:35:29,641 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:29,641 INFO L375 BasicCegarLoop]: trace histogram [107, 1, 1, 1] [2018-09-23 19:35:29,642 INFO L423 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:29,642 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:29,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1504103624, now seen corresponding path program 107 times [2018-09-23 19:35:29,642 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:29,642 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:29,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:29,643 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:29,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:29,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:34,077 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:35:34,077 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:34,077 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 [2018-09-23 19:35:34,086 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:35:34,161 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2018-09-23 19:35:34,161 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:34,165 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:34,184 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:35:34,205 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:34,205 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109] total 109 [2018-09-23 19:35:34,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-09-23 19:35:34,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-09-23 19:35:34,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-09-23 19:35:34,207 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 110 states. [2018-09-23 19:35:34,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:34,494 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2018-09-23 19:35:34,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-09-23 19:35:34,494 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 110 [2018-09-23 19:35:34,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:34,495 INFO L225 Difference]: With dead ends: 114 [2018-09-23 19:35:34,495 INFO L226 Difference]: Without dead ends: 112 [2018-09-23 19:35:34,496 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 [2018-09-23 19:35:34,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-09-23 19:35:34,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-09-23 19:35:34,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-09-23 19:35:34,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-09-23 19:35:34,498 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 110 [2018-09-23 19:35:34,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:34,498 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-09-23 19:35:34,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-09-23 19:35:34,498 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-09-23 19:35:34,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-09-23 19:35:34,498 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:34,499 INFO L375 BasicCegarLoop]: trace histogram [108, 1, 1, 1] [2018-09-23 19:35:34,499 INFO L423 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:34,499 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:34,499 INFO L82 PathProgramCache]: Analyzing trace with hash -617429887, now seen corresponding path program 108 times [2018-09-23 19:35:34,499 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:34,499 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:34,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:34,500 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:34,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:34,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:38,927 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 0 proven. 5886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:35:38,927 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:38,927 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 [2018-09-23 19:35:38,934 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:35:39,025 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-09-23 19:35:39,026 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:39,029 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:39,049 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 0 proven. 5886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:35:39,070 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:39,070 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 110] total 110 [2018-09-23 19:35:39,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 111 states [2018-09-23 19:35:39,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2018-09-23 19:35:39,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-09-23 19:35:39,072 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 111 states. [2018-09-23 19:35:39,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:39,360 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-09-23 19:35:39,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-09-23 19:35:39,360 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 111 [2018-09-23 19:35:39,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:39,361 INFO L225 Difference]: With dead ends: 115 [2018-09-23 19:35:39,361 INFO L226 Difference]: Without dead ends: 113 [2018-09-23 19:35:39,362 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-09-23 19:35:39,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-23 19:35:39,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-09-23 19:35:39,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-23 19:35:39,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-09-23 19:35:39,365 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 111 [2018-09-23 19:35:39,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:39,365 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-09-23 19:35:39,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has 111 states. [2018-09-23 19:35:39,365 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-09-23 19:35:39,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-23 19:35:39,365 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:39,365 INFO L375 BasicCegarLoop]: trace histogram [109, 1, 1, 1] [2018-09-23 19:35:39,366 INFO L423 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:39,366 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:39,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1960459288, now seen corresponding path program 109 times [2018-09-23 19:35:39,366 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:39,366 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:39,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:39,367 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:39,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:39,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:43,930 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:35:43,930 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:43,930 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:35:43,937 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:35:43,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:43,984 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:44,005 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:35:44,025 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:44,026 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 111] total 111 [2018-09-23 19:35:44,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-09-23 19:35:44,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-09-23 19:35:44,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2018-09-23 19:35:44,027 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 112 states. [2018-09-23 19:35:44,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:44,281 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2018-09-23 19:35:44,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-09-23 19:35:44,282 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 112 [2018-09-23 19:35:44,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:44,282 INFO L225 Difference]: With dead ends: 116 [2018-09-23 19:35:44,283 INFO L226 Difference]: Without dead ends: 114 [2018-09-23 19:35:44,284 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2018-09-23 19:35:44,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-09-23 19:35:44,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-09-23 19:35:44,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-09-23 19:35:44,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2018-09-23 19:35:44,286 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 112 [2018-09-23 19:35:44,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:44,287 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2018-09-23 19:35:44,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-09-23 19:35:44,287 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2018-09-23 19:35:44,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-09-23 19:35:44,287 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:44,287 INFO L375 BasicCegarLoop]: trace histogram [110, 1, 1, 1] [2018-09-23 19:35:44,288 INFO L423 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:44,288 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:44,288 INFO L82 PathProgramCache]: Analyzing trace with hash -644697759, now seen corresponding path program 110 times [2018-09-23 19:35:44,288 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:44,288 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:44,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:44,289 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:35:44,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:44,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:48,974 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:35:48,974 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:48,974 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:35:48,982 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:35:49,030 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:35:49,030 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:49,033 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:49,052 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:35:49,072 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:49,073 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 112] total 112 [2018-09-23 19:35:49,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-09-23 19:35:49,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-09-23 19:35:49,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2018-09-23 19:35:49,074 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 113 states. [2018-09-23 19:35:49,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:49,426 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-09-23 19:35:49,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-09-23 19:35:49,427 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 113 [2018-09-23 19:35:49,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:49,427 INFO L225 Difference]: With dead ends: 117 [2018-09-23 19:35:49,427 INFO L226 Difference]: Without dead ends: 115 [2018-09-23 19:35:49,428 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2018-09-23 19:35:49,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-23 19:35:49,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-09-23 19:35:49,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-23 19:35:49,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-09-23 19:35:49,430 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 113 [2018-09-23 19:35:49,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:49,431 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-09-23 19:35:49,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-09-23 19:35:49,431 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-09-23 19:35:49,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-23 19:35:49,432 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:49,432 INFO L375 BasicCegarLoop]: trace histogram [111, 1, 1, 1] [2018-09-23 19:35:49,432 INFO L423 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:49,432 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:49,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1489203976, now seen corresponding path program 111 times [2018-09-23 19:35:49,432 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:49,433 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:49,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:49,433 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:49,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:49,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:54,304 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:35:54,304 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:54,304 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:35:54,311 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:35:54,407 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 57 check-sat command(s) [2018-09-23 19:35:54,407 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:54,410 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:54,430 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:35:54,452 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:54,452 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 113] total 113 [2018-09-23 19:35:54,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-09-23 19:35:54,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-09-23 19:35:54,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6441, Invalid=6441, Unknown=0, NotChecked=0, Total=12882 [2018-09-23 19:35:54,454 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 114 states. [2018-09-23 19:35:54,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:54,775 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2018-09-23 19:35:54,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2018-09-23 19:35:54,776 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 114 [2018-09-23 19:35:54,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:54,776 INFO L225 Difference]: With dead ends: 118 [2018-09-23 19:35:54,776 INFO L226 Difference]: Without dead ends: 116 [2018-09-23 19:35:54,777 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=6441, Invalid=6441, Unknown=0, NotChecked=0, Total=12882 [2018-09-23 19:35:54,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-09-23 19:35:54,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-09-23 19:35:54,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-09-23 19:35:54,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2018-09-23 19:35:54,781 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 114 [2018-09-23 19:35:54,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:54,781 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2018-09-23 19:35:54,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-09-23 19:35:54,781 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2018-09-23 19:35:54,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-09-23 19:35:54,782 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:54,782 INFO L375 BasicCegarLoop]: trace histogram [112, 1, 1, 1] [2018-09-23 19:35:54,782 INFO L423 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:54,782 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:54,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1079318975, now seen corresponding path program 112 times [2018-09-23 19:35:54,782 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:54,782 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:54,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:54,783 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:54,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:54,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-09-23 19:35:57,960 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-23 19:35:57,964 WARN L206 ceAbstractionStarter]: Timeout [2018-09-23 19:35:57,964 INFO L202 PluginConnector]: Adding new model count_by_2.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.09 07:35:57 BoogieIcfgContainer [2018-09-23 19:35:57,964 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-23 19:35:57,965 INFO L168 Benchmark]: Toolchain (without parser) took 233755.17 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -111.7 MB). Free memory was 1.5 GB in the beginning and 1.0 GB in the end (delta: 453.8 MB). Peak memory consumption was 342.1 MB. Max. memory is 7.1 GB. [2018-09-23 19:35:57,967 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 19:35:57,967 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.98 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. [2018-09-23 19:35:57,967 INFO L168 Benchmark]: Boogie Preprocessor took 23.47 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. [2018-09-23 19:35:57,967 INFO L168 Benchmark]: RCFGBuilder took 246.12 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. [2018-09-23 19:35:57,968 INFO L168 Benchmark]: TraceAbstraction took 233435.39 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -111.7 MB). Free memory was 1.4 GB in the beginning and 1.0 GB in the end (delta: 432.7 MB). Peak memory consumption was 321.0 MB. Max. memory is 7.1 GB. [2018-09-23 19:35:57,970 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 43.98 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 23.47 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 246.12 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 233435.39 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -111.7 MB). Free memory was 1.4 GB in the beginning and 1.0 GB in the end (delta: 432.7 MB). Peak memory consumption was 321.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 32]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 32). Cancelled while BasicCegarLoop was analyzing trace of length 116 with TraceHistMax 112, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 90 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 233.3s OverallTime, 113 OverallIterations, 112 TraceHistogramMax, 22.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 336 SDtfs, 0 SDslu, 4969 SDs, 0 SdLazy, 11409 SolverSat, 166 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 16.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12878 GetRequests, 6550 SyntacticMatches, 0 SemanticMatches, 6328 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 193.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=116occurred in iteration=112, 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, 112 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 5.1s SatisfiabilityAnalysisTime, 197.2s InterpolantComputationTime, 13101 NumberOfCodeBlocks, 13101 NumberOfCodeBlocksAsserted, 1837 NumberOfCheckSat, 12878 ConstructedInterpolants, 0 QuantifiedInterpolants, 2898440 SizeOfPredicates, 111 NumberOfNonLiveVariables, 20091 ConjunctsInSsa, 6456 ConjunctsInUnsatCore, 223 InterpolantComputations, 1 PerfectInterpolantSequences, 0/468272 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/count_by_2.i_3.bplTransformedIcfg_BEv2_3.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-23_19-35-57-978.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/count_by_2.i_3.bplTransformedIcfg_BEv2_3.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-23_19-35-57-978.csv Completed graceful shutdown