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_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-4eac566 [2018-09-23 19:34:52,987 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-23 19:34:52,989 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-23 19:34:53,005 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-23 19:34:53,005 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-23 19:34:53,007 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-23 19:34:53,009 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-23 19:34:53,011 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-23 19:34:53,014 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-23 19:34:53,022 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-23 19:34:53,023 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-23 19:34:53,059 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 19:34:53,073 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-23 19:34:53,074 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-23 19:34:53,074 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-23 19:34:53,075 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-23 19:34:53,075 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-23 19:34:53,075 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-23 19:34:53,076 INFO L133 SettingsManager]: * Use SBE=true [2018-09-23 19:34:53,076 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-23 19:34:53,076 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-23 19:34:53,076 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-23 19:34:53,076 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-23 19:34:53,077 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-23 19:34:53,077 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-23 19:34:53,077 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-23 19:34:53,077 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-23 19:34:53,077 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-23 19:34:53,077 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-23 19:34:53,078 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-23 19:34:53,078 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-23 19:34:53,078 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-23 19:34:53,078 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-23 19:34:53,078 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-23 19:34:53,079 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 19:34:53,079 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-23 19:34:53,079 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-23 19:34:53,079 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-23 19:34:53,079 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-23 19:34:53,079 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-23 19:34:53,080 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-23 19:34:53,080 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-23 19:34:53,142 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-23 19:34:53,154 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-23 19:34:53,160 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-23 19:34:53,162 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-23 19:34:53,162 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-23 19:34:53,163 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl [2018-09-23 19:34:53,163 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl' [2018-09-23 19:34:53,213 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-23 19:34:53,216 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-23 19:34:53,217 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-23 19:34:53,218 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-23 19:34:53,218 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-23 19:34:53,239 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:34:53" (1/1) ... [2018-09-23 19:34:53,251 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:34:53" (1/1) ... [2018-09-23 19:34:53,258 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-23 19:34:53,258 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-23 19:34:53,259 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-23 19:34:53,259 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-23 19:34:53,270 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:34:53" (1/1) ... [2018-09-23 19:34:53,270 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:34:53" (1/1) ... [2018-09-23 19:34:53,271 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:34:53" (1/1) ... [2018-09-23 19:34:53,271 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:34:53" (1/1) ... [2018-09-23 19:34:53,274 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:34:53" (1/1) ... [2018-09-23 19:34:53,276 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:34:53" (1/1) ... [2018-09-23 19:34:53,277 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:34:53" (1/1) ... [2018-09-23 19:34:53,278 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-23 19:34:53,278 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-23 19:34:53,279 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-23 19:34:53,279 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-23 19:34:53,280 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:34:53" (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 19:34:53,356 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-09-23 19:34:53,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-23 19:34:53,357 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-23 19:34:53,562 INFO L354 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-23 19:34:53,562 INFO L202 PluginConnector]: Adding new model count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 07:34:53 BoogieIcfgContainer [2018-09-23 19:34:53,562 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-23 19:34:53,563 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-23 19:34:53,563 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-23 19:34:53,567 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-23 19:34:53,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:34:53" (1/2) ... [2018-09-23 19:34:53,568 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21ef3795 and model type count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.09 07:34:53, skipping insertion in model container [2018-09-23 19:34:53,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 07:34:53" (2/2) ... [2018-09-23 19:34:53,571 INFO L112 eAbstractionObserver]: Analyzing ICFG count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl [2018-09-23 19:34:53,582 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-23 19:34:53,593 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-23 19:34:53,653 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-23 19:34:53,654 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-23 19:34:53,654 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-23 19:34:53,654 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-23 19:34:53,655 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-23 19:34:53,655 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-23 19:34:53,655 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-23 19:34:53,655 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-23 19:34:53,657 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-23 19:34:53,674 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-09-23 19:34:53,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-23 19:34:53,682 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:34:53,693 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-23 19:34:53,694 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:34:53,705 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:34:53,706 INFO L82 PathProgramCache]: Analyzing trace with hash 30017, now seen corresponding path program 1 times [2018-09-23 19:34:53,709 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:34:53,710 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:34:53,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:53,759 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:34:53,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:53,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:53,844 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 19:34:53,846 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 19:34:53,847 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-23 19:34:53,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-23 19:34:53,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-23 19:34:53,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 19:34:53,868 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-09-23 19:34:53,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:34:53,923 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2018-09-23 19:34:53,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-23 19:34:53,925 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-23 19:34:53,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:34:53,936 INFO L225 Difference]: With dead ends: 9 [2018-09-23 19:34:53,936 INFO L226 Difference]: Without dead ends: 5 [2018-09-23 19:34:53,940 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 19:34:53,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-09-23 19:34:53,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-09-23 19:34:53,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-09-23 19:34:53,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-09-23 19:34:53,977 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-09-23 19:34:53,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:34:53,977 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-09-23 19:34:53,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-23 19:34:53,977 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-09-23 19:34:53,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-23 19:34:53,978 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:34:53,978 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-23 19:34:53,978 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:34:53,979 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:34:53,979 INFO L82 PathProgramCache]: Analyzing trace with hash 928552, now seen corresponding path program 1 times [2018-09-23 19:34:53,979 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:34:53,979 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:34:53,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:53,980 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:34:53,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:53,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:54,111 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 19:34:54,112 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:34:54,112 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 19:34:54,129 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:34:54,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:54,163 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:34:54,202 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 19:34:54,237 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:34:54,237 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-23 19:34:54,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-23 19:34:54,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-23 19:34:54,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-23 19:34:54,239 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 4 states. [2018-09-23 19:34:54,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:34:54,334 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-09-23 19:34:54,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-23 19:34:54,335 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-09-23 19:34:54,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:34:54,336 INFO L225 Difference]: With dead ends: 8 [2018-09-23 19:34:54,336 INFO L226 Difference]: Without dead ends: 6 [2018-09-23 19:34:54,337 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-23 19:34:54,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-23 19:34:54,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-23 19:34:54,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-23 19:34:54,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-23 19:34:54,340 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-09-23 19:34:54,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:34:54,340 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-23 19:34:54,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-23 19:34:54,341 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-23 19:34:54,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-23 19:34:54,341 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:34:54,341 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-09-23 19:34:54,342 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:34:54,342 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:34:54,342 INFO L82 PathProgramCache]: Analyzing trace with hash 28783137, now seen corresponding path program 2 times [2018-09-23 19:34:54,342 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:34:54,342 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:34:54,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:54,344 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:34:54,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:54,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:54,603 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 19:34:54,603 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:34:54,603 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:34:54,618 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:34:54,643 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:34:54,643 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:34:54,645 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:34:54,651 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 19:34:54,674 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:34:54,674 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-23 19:34:54,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-23 19:34:54,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-23 19:34:54,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-23 19:34:54,676 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 5 states. [2018-09-23 19:34:54,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:34:54,714 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-23 19:34:54,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-23 19:34:54,715 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2018-09-23 19:34:54,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:34:54,715 INFO L225 Difference]: With dead ends: 9 [2018-09-23 19:34:54,715 INFO L226 Difference]: Without dead ends: 7 [2018-09-23 19:34:54,716 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-23 19:34:54,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-23 19:34:54,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-23 19:34:54,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-23 19:34:54,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-23 19:34:54,719 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-09-23 19:34:54,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:34:54,720 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-23 19:34:54,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-23 19:34:54,720 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-23 19:34:54,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-23 19:34:54,723 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:34:54,723 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2018-09-23 19:34:54,724 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:34:54,724 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:34:54,724 INFO L82 PathProgramCache]: Analyzing trace with hash 892275272, now seen corresponding path program 3 times [2018-09-23 19:34:54,726 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:34:54,726 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:34:54,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:54,727 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:34:54,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:54,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:54,852 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 19:34:54,852 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:34:54,852 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 19:34:54,862 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:34:54,921 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-23 19:34:54,922 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:34:54,924 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:34:54,933 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 19:34:54,956 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:34:54,957 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-23 19:34:54,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-23 19:34:54,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-23 19:34:54,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-23 19:34:54,958 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2018-09-23 19:34:55,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:34:55,019 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-09-23 19:34:55,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-23 19:34:55,020 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2018-09-23 19:34:55,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:34:55,021 INFO L225 Difference]: With dead ends: 10 [2018-09-23 19:34:55,021 INFO L226 Difference]: Without dead ends: 8 [2018-09-23 19:34:55,022 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 19:34:55,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-23 19:34:55,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-23 19:34:55,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-23 19:34:55,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-09-23 19:34:55,025 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-09-23 19:34:55,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:34:55,025 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-09-23 19:34:55,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-23 19:34:55,026 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-09-23 19:34:55,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-23 19:34:55,026 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:34:55,026 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1, 1] [2018-09-23 19:34:55,027 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:34:55,027 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:34:55,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1890727681, now seen corresponding path program 4 times [2018-09-23 19:34:55,027 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:34:55,028 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:34:55,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:55,029 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:34:55,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:55,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:55,344 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 19:34:55,345 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:34:55,345 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 19:34:55,355 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:34:55,393 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:34:55,393 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:34:55,395 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:34:55,403 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 19:34:55,426 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:34:55,426 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-23 19:34:55,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-23 19:34:55,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-23 19:34:55,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-23 19:34:55,428 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 7 states. [2018-09-23 19:34:55,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:34:55,466 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-23 19:34:55,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-23 19:34:55,467 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-09-23 19:34:55,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:34:55,468 INFO L225 Difference]: With dead ends: 11 [2018-09-23 19:34:55,468 INFO L226 Difference]: Without dead ends: 9 [2018-09-23 19:34:55,468 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 19:34:55,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-23 19:34:55,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-23 19:34:55,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-23 19:34:55,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-23 19:34:55,472 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-09-23 19:34:55,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:34:55,472 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-23 19:34:55,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-23 19:34:55,473 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-23 19:34:55,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-23 19:34:55,473 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:34:55,473 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1] [2018-09-23 19:34:55,474 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:34:55,474 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:34:55,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1516986008, now seen corresponding path program 5 times [2018-09-23 19:34:55,474 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:34:55,475 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:34:55,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:55,477 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:34:55,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:55,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:55,688 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 19:34:55,688 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:34:55,688 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:34:55,701 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:34:55,746 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-23 19:34:55,747 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:34:55,749 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:34:55,756 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 19:34:55,789 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:34:55,789 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-23 19:34:55,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 19:34:55,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 19:34:55,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:34:55,790 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 8 states. [2018-09-23 19:34:55,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:34:55,863 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-09-23 19:34:55,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 19:34:55,865 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2018-09-23 19:34:55,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:34:55,865 INFO L225 Difference]: With dead ends: 12 [2018-09-23 19:34:55,866 INFO L226 Difference]: Without dead ends: 10 [2018-09-23 19:34:55,866 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 19:34:55,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-23 19:34:55,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-23 19:34:55,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-23 19:34:55,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-23 19:34:55,869 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-09-23 19:34:55,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:34:55,870 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-23 19:34:55,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 19:34:55,870 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-23 19:34:55,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-23 19:34:55,870 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:34:55,871 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1, 1] [2018-09-23 19:34:55,871 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:34:55,871 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:34:55,871 INFO L82 PathProgramCache]: Analyzing trace with hash 218072033, now seen corresponding path program 6 times [2018-09-23 19:34:55,872 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:34:55,872 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:34:55,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:55,873 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:34:55,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:55,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:56,008 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 19:34:56,009 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:34:56,009 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:34:56,023 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:34:56,093 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-23 19:34:56,094 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:34:56,096 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:34:56,104 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 19:34:56,135 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:34:56,135 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:34:56,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:34:56,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:34:56,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:34:56,136 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 9 states. [2018-09-23 19:34:56,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:34:56,226 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-23 19:34:56,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:34:56,228 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2018-09-23 19:34:56,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:34:56,229 INFO L225 Difference]: With dead ends: 13 [2018-09-23 19:34:56,229 INFO L226 Difference]: Without dead ends: 11 [2018-09-23 19:34:56,229 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:34:56,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-23 19:34:56,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-23 19:34:56,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-23 19:34:56,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-23 19:34:56,233 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-09-23 19:34:56,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:34:56,233 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-23 19:34:56,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:34:56,233 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-23 19:34:56,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-23 19:34:56,234 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:34:56,234 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1, 1] [2018-09-23 19:34:56,234 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:34:56,235 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:34:56,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1829703544, now seen corresponding path program 7 times [2018-09-23 19:34:56,235 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:34:56,235 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:34:56,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:56,236 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:34:56,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:56,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:56,726 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 19:34:56,726 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:34:56,726 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:34:56,734 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:34:56,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:56,758 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:34:56,771 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 19:34:56,793 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:34:56,794 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:34:56,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:34:56,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:34:56,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:34:56,795 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-09-23 19:34:56,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:34:56,851 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-09-23 19:34:56,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:34:56,851 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2018-09-23 19:34:56,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:34:56,852 INFO L225 Difference]: With dead ends: 14 [2018-09-23 19:34:56,852 INFO L226 Difference]: Without dead ends: 12 [2018-09-23 19:34:56,853 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:34:56,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-23 19:34:56,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-23 19:34:56,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-23 19:34:56,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-23 19:34:56,857 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-09-23 19:34:56,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:34:56,857 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-23 19:34:56,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:34:56,857 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-23 19:34:56,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-23 19:34:56,858 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:34:56,858 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1, 1] [2018-09-23 19:34:56,858 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:34:56,858 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:34:56,859 INFO L82 PathProgramCache]: Analyzing trace with hash -886236991, now seen corresponding path program 8 times [2018-09-23 19:34:56,859 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:34:56,859 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:34:56,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:56,860 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:34:56,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:56,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:57,051 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 19:34:57,052 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:34:57,052 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:34:57,061 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:34:57,087 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:34:57,088 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:34:57,090 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:34:57,098 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 19:34:57,119 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:34:57,119 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:34:57,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:34:57,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:34:57,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:34:57,121 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 11 states. [2018-09-23 19:34:57,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:34:57,168 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-23 19:34:57,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:34:57,172 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2018-09-23 19:34:57,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:34:57,173 INFO L225 Difference]: With dead ends: 15 [2018-09-23 19:34:57,173 INFO L226 Difference]: Without dead ends: 13 [2018-09-23 19:34:57,174 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:34:57,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-23 19:34:57,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-23 19:34:57,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-23 19:34:57,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-23 19:34:57,177 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-09-23 19:34:57,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:34:57,177 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-23 19:34:57,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:34:57,178 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-23 19:34:57,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-23 19:34:57,178 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:34:57,178 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1, 1] [2018-09-23 19:34:57,179 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:34:57,179 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:34:57,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1703544920, now seen corresponding path program 9 times [2018-09-23 19:34:57,179 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:34:57,179 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:34:57,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:57,180 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:34:57,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:57,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:57,342 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 19:34:57,343 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:34:57,343 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 19:34:57,353 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:34:57,438 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-23 19:34:57,439 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:34:57,441 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:34:57,449 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 19:34:57,469 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:34:57,470 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-23 19:34:57,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-23 19:34:57,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-23 19:34:57,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-23 19:34:57,471 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 12 states. [2018-09-23 19:34:57,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:34:57,530 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-09-23 19:34:57,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-23 19:34:57,530 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2018-09-23 19:34:57,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:34:57,531 INFO L225 Difference]: With dead ends: 16 [2018-09-23 19:34:57,531 INFO L226 Difference]: Without dead ends: 14 [2018-09-23 19:34:57,532 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 19:34:57,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-23 19:34:57,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-23 19:34:57,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-23 19:34:57,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-23 19:34:57,535 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-09-23 19:34:57,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:34:57,535 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-23 19:34:57,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-23 19:34:57,535 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-23 19:34:57,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-23 19:34:57,536 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:34:57,536 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1, 1] [2018-09-23 19:34:57,536 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:34:57,536 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:34:57,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1270286943, now seen corresponding path program 10 times [2018-09-23 19:34:57,537 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:34:57,537 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:34:57,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:57,538 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:34:57,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:57,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:57,808 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 19:34:57,808 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:34:57,808 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 19:34:57,817 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:34:57,840 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:34:57,840 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:34:57,842 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:34:57,850 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 19:34:57,874 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:34:57,874 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-23 19:34:57,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-23 19:34:57,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-23 19:34:57,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-23 19:34:57,875 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 13 states. [2018-09-23 19:34:57,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:34:57,927 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-23 19:34:57,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-23 19:34:57,927 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 13 [2018-09-23 19:34:57,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:34:57,928 INFO L225 Difference]: With dead ends: 17 [2018-09-23 19:34:57,928 INFO L226 Difference]: Without dead ends: 15 [2018-09-23 19:34:57,928 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-23 19:34:57,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-23 19:34:57,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-23 19:34:57,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-23 19:34:57,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-23 19:34:57,931 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-09-23 19:34:57,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:34:57,932 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-23 19:34:57,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-23 19:34:57,932 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-23 19:34:57,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-23 19:34:57,933 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:34:57,933 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1, 1] [2018-09-23 19:34:57,933 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:34:57,933 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:34:57,933 INFO L82 PathProgramCache]: Analyzing trace with hash -724191544, now seen corresponding path program 11 times [2018-09-23 19:34:57,934 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:34:57,934 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:34:57,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:57,935 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:34:57,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:57,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:58,128 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 19:34:58,128 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:34:58,129 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:34:58,138 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:34:58,257 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-23 19:34:58,258 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:34:58,261 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:34:58,270 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 19:34:58,305 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:34:58,306 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-23 19:34:58,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 19:34:58,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 19:34:58,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-23 19:34:58,307 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 14 states. [2018-09-23 19:34:58,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:34:58,437 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-09-23 19:34:58,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-23 19:34:58,438 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-09-23 19:34:58,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:34:58,439 INFO L225 Difference]: With dead ends: 18 [2018-09-23 19:34:58,439 INFO L226 Difference]: Without dead ends: 16 [2018-09-23 19:34:58,440 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-23 19:34:58,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-23 19:34:58,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-23 19:34:58,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-23 19:34:58,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-09-23 19:34:58,443 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-09-23 19:34:58,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:34:58,443 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-09-23 19:34:58,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 19:34:58,444 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-09-23 19:34:58,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:34:58,444 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:34:58,444 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1, 1] [2018-09-23 19:34:58,444 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:34:58,445 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:34:58,445 INFO L82 PathProgramCache]: Analyzing trace with hash -975103359, now seen corresponding path program 12 times [2018-09-23 19:34:58,445 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:34:58,445 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:34:58,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:58,446 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:34:58,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:58,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:58,657 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 19:34:58,658 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:34:58,658 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 19:34:58,666 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:34:58,697 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-23 19:34:58,697 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:34:58,700 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:34:58,710 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 19:34:58,734 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:34:58,735 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-23 19:34:58,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-23 19:34:58,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-23 19:34:58,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-23 19:34:58,736 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 15 states. [2018-09-23 19:34:58,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:34:58,778 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-23 19:34:58,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-23 19:34:58,781 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-09-23 19:34:58,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:34:58,782 INFO L225 Difference]: With dead ends: 19 [2018-09-23 19:34:58,782 INFO L226 Difference]: Without dead ends: 17 [2018-09-23 19:34:58,783 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 19:34:58,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-23 19:34:58,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-23 19:34:58,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-23 19:34:58,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-23 19:34:58,786 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-09-23 19:34:58,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:34:58,787 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-23 19:34:58,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-23 19:34:58,787 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-23 19:34:58,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-23 19:34:58,787 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:34:58,787 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1, 1] [2018-09-23 19:34:58,788 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:34:58,788 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:34:58,788 INFO L82 PathProgramCache]: Analyzing trace with hash -163435032, now seen corresponding path program 13 times [2018-09-23 19:34:58,788 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:34:58,788 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:34:58,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:58,789 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:34:58,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:58,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:59,055 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 19:34:59,056 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:34:59,056 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 19:34:59,066 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:34:59,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:59,095 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:34:59,104 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 19:34:59,127 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:34:59,127 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-23 19:34:59,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-23 19:34:59,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-23 19:34:59,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-23 19:34:59,129 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 16 states. [2018-09-23 19:34:59,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:34:59,381 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-09-23 19:34:59,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-23 19:34:59,382 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2018-09-23 19:34:59,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:34:59,383 INFO L225 Difference]: With dead ends: 20 [2018-09-23 19:34:59,383 INFO L226 Difference]: Without dead ends: 18 [2018-09-23 19:34:59,385 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 19:34:59,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-23 19:34:59,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-23 19:34:59,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-23 19:34:59,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-09-23 19:34:59,392 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-09-23 19:34:59,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:34:59,392 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-09-23 19:34:59,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-23 19:34:59,392 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-09-23 19:34:59,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:34:59,393 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:34:59,393 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1, 1] [2018-09-23 19:34:59,393 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:34:59,394 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:34:59,394 INFO L82 PathProgramCache]: Analyzing trace with hash -771520671, now seen corresponding path program 14 times [2018-09-23 19:34:59,394 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:34:59,394 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:34:59,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:59,396 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:34:59,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:59,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:59,645 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 19:34:59,646 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:34:59,646 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 19:34:59,679 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:34:59,711 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:34:59,711 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:34:59,713 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:34:59,722 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 19:34:59,744 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:34:59,745 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-23 19:34:59,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-23 19:34:59,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-23 19:34:59,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-23 19:34:59,746 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 17 states. [2018-09-23 19:34:59,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:34:59,802 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-23 19:34:59,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-23 19:34:59,803 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2018-09-23 19:34:59,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:34:59,803 INFO L225 Difference]: With dead ends: 21 [2018-09-23 19:34:59,803 INFO L226 Difference]: Without dead ends: 19 [2018-09-23 19:34:59,804 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-23 19:34:59,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-23 19:34:59,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-23 19:34:59,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-23 19:34:59,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-23 19:34:59,808 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-09-23 19:34:59,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:34:59,808 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-23 19:34:59,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-23 19:34:59,808 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-23 19:34:59,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-23 19:34:59,809 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:34:59,809 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1, 1] [2018-09-23 19:34:59,809 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:34:59,810 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:34:59,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1852661000, now seen corresponding path program 15 times [2018-09-23 19:34:59,810 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:34:59,810 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:34:59,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:59,811 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:34:59,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:59,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:00,043 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 19:35:00,043 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:00,044 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 19:35:00,053 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:35:00,174 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-23 19:35:00,175 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:00,178 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:00,186 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 19:35:00,208 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:00,208 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-23 19:35:00,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-23 19:35:00,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-23 19:35:00,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-23 19:35:00,209 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 18 states. [2018-09-23 19:35:00,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:00,291 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-09-23 19:35:00,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-23 19:35:00,292 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-09-23 19:35:00,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:00,293 INFO L225 Difference]: With dead ends: 22 [2018-09-23 19:35:00,293 INFO L226 Difference]: Without dead ends: 20 [2018-09-23 19:35:00,294 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 19:35:00,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-23 19:35:00,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-23 19:35:00,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-23 19:35:00,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-09-23 19:35:00,298 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-09-23 19:35:00,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:00,298 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-09-23 19:35:00,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-23 19:35:00,298 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-09-23 19:35:00,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:35:00,299 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:00,299 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1, 1] [2018-09-23 19:35:00,299 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:00,299 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:00,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1597914177, now seen corresponding path program 16 times [2018-09-23 19:35:00,300 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:00,300 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:00,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:00,300 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:00,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:00,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:00,827 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 19:35:00,828 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:00,828 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:35:00,835 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:35:00,866 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:35:00,867 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:00,869 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:00,879 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 19:35:00,913 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:00,914 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-23 19:35:00,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-23 19:35:00,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-23 19:35:00,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-23 19:35:00,915 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 19 states. [2018-09-23 19:35:01,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:01,012 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-23 19:35:01,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-23 19:35:01,013 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2018-09-23 19:35:01,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:01,014 INFO L225 Difference]: With dead ends: 23 [2018-09-23 19:35:01,014 INFO L226 Difference]: Without dead ends: 21 [2018-09-23 19:35:01,015 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-23 19:35:01,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-23 19:35:01,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-23 19:35:01,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-23 19:35:01,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-23 19:35:01,018 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-09-23 19:35:01,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:01,019 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-23 19:35:01,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-23 19:35:01,019 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-23 19:35:01,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-23 19:35:01,020 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:01,020 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1, 1] [2018-09-23 19:35:01,020 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:01,020 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:01,020 INFO L82 PathProgramCache]: Analyzing trace with hash -2004270040, now seen corresponding path program 17 times [2018-09-23 19:35:01,020 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:01,021 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:01,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:01,021 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:01,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:01,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:01,516 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 19:35:01,516 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:01,516 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 19:35:01,525 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:35:01,592 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-23 19:35:01,592 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:01,594 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:01,603 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 19:35:01,626 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:01,626 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-23 19:35:01,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-23 19:35:01,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-23 19:35:01,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-23 19:35:01,628 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 20 states. [2018-09-23 19:35:01,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:01,708 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-09-23 19:35:01,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-23 19:35:01,709 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2018-09-23 19:35:01,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:01,710 INFO L225 Difference]: With dead ends: 24 [2018-09-23 19:35:01,710 INFO L226 Difference]: Without dead ends: 22 [2018-09-23 19:35:01,711 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-23 19:35:01,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-23 19:35:01,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-23 19:35:01,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-23 19:35:01,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-09-23 19:35:01,715 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-09-23 19:35:01,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:01,715 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-09-23 19:35:01,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-23 19:35:01,715 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-09-23 19:35:01,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-23 19:35:01,716 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:01,716 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1, 1] [2018-09-23 19:35:01,716 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:01,717 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:01,717 INFO L82 PathProgramCache]: Analyzing trace with hash -2002831071, now seen corresponding path program 18 times [2018-09-23 19:35:01,717 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:01,717 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:01,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:01,718 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:01,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:01,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:02,242 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 19:35:02,242 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:02,242 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 19:35:02,252 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:35:02,316 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-09-23 19:35:02,317 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:02,319 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:02,329 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 19:35:02,358 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:02,359 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-23 19:35:02,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-23 19:35:02,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-23 19:35:02,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-23 19:35:02,360 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 21 states. [2018-09-23 19:35:02,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:02,410 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-23 19:35:02,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-23 19:35:02,411 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 21 [2018-09-23 19:35:02,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:02,412 INFO L225 Difference]: With dead ends: 25 [2018-09-23 19:35:02,412 INFO L226 Difference]: Without dead ends: 23 [2018-09-23 19:35:02,413 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 19:35:02,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-23 19:35:02,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-23 19:35:02,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-23 19:35:02,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-23 19:35:02,417 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-09-23 19:35:02,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:02,417 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-23 19:35:02,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-23 19:35:02,417 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-23 19:35:02,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-23 19:35:02,418 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:02,418 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1, 1] [2018-09-23 19:35:02,418 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:02,419 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:02,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1958223032, now seen corresponding path program 19 times [2018-09-23 19:35:02,419 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:02,419 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:02,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:02,420 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:02,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:02,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:02,689 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 19:35:02,689 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:02,689 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:35:02,700 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:35:02,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:02,733 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:02,743 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 19:35:02,774 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:02,774 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-23 19:35:02,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-23 19:35:02,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-23 19:35:02,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-23 19:35:02,775 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 22 states. [2018-09-23 19:35:02,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:02,891 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-09-23 19:35:02,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-23 19:35:02,891 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2018-09-23 19:35:02,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:02,892 INFO L225 Difference]: With dead ends: 26 [2018-09-23 19:35:02,892 INFO L226 Difference]: Without dead ends: 24 [2018-09-23 19:35:02,893 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-23 19:35:02,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-23 19:35:02,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-23 19:35:02,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-23 19:35:02,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-09-23 19:35:02,896 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-09-23 19:35:02,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:02,896 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-09-23 19:35:02,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-23 19:35:02,896 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-09-23 19:35:02,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-23 19:35:02,897 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:02,897 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1, 1] [2018-09-23 19:35:02,897 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:02,898 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:02,898 INFO L82 PathProgramCache]: Analyzing trace with hash -575373823, now seen corresponding path program 20 times [2018-09-23 19:35:02,898 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:02,898 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:02,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:02,899 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:35:02,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:02,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:03,262 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 19:35:03,262 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:03,262 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 19:35:03,276 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:35:03,313 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:35:03,314 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:03,316 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:03,326 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 19:35:03,348 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:03,348 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-23 19:35:03,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-23 19:35:03,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-23 19:35:03,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-23 19:35:03,350 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 23 states. [2018-09-23 19:35:03,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:03,405 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-23 19:35:03,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-23 19:35:03,406 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 23 [2018-09-23 19:35:03,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:03,407 INFO L225 Difference]: With dead ends: 27 [2018-09-23 19:35:03,407 INFO L226 Difference]: Without dead ends: 25 [2018-09-23 19:35:03,408 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-23 19:35:03,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-23 19:35:03,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-23 19:35:03,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-23 19:35:03,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-23 19:35:03,411 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-09-23 19:35:03,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:03,411 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-23 19:35:03,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-23 19:35:03,412 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-23 19:35:03,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-23 19:35:03,412 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:03,412 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1, 1] [2018-09-23 19:35:03,413 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:03,413 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:03,413 INFO L82 PathProgramCache]: Analyzing trace with hash -656721304, now seen corresponding path program 21 times [2018-09-23 19:35:03,413 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:03,413 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:03,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:03,414 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:03,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:03,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:03,854 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 19:35:03,854 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:03,854 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:35:03,861 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:35:03,899 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-23 19:35:03,900 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:03,902 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:03,911 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 19:35:03,934 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:03,934 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-23 19:35:03,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-23 19:35:03,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-23 19:35:03,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-23 19:35:03,935 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 24 states. [2018-09-23 19:35:04,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:04,003 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-09-23 19:35:04,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-23 19:35:04,003 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 24 [2018-09-23 19:35:04,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:04,004 INFO L225 Difference]: With dead ends: 28 [2018-09-23 19:35:04,005 INFO L226 Difference]: Without dead ends: 26 [2018-09-23 19:35:04,005 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-23 19:35:04,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-23 19:35:04,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-23 19:35:04,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-23 19:35:04,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-09-23 19:35:04,009 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-09-23 19:35:04,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:04,009 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-09-23 19:35:04,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-23 19:35:04,010 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-09-23 19:35:04,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-23 19:35:04,010 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:04,011 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1, 1] [2018-09-23 19:35:04,011 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:04,011 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:04,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1116474081, now seen corresponding path program 22 times [2018-09-23 19:35:04,011 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:04,011 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:04,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:04,012 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:04,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:04,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:04,414 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 19:35:04,414 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:04,414 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 19:35:04,423 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:35:04,464 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:35:04,464 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:04,467 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:04,478 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 19:35:04,508 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:04,508 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-23 19:35:04,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-23 19:35:04,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-23 19:35:04,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-23 19:35:04,509 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 25 states. [2018-09-23 19:35:04,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:04,642 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-23 19:35:04,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-23 19:35:04,642 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 25 [2018-09-23 19:35:04,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:04,643 INFO L225 Difference]: With dead ends: 29 [2018-09-23 19:35:04,643 INFO L226 Difference]: Without dead ends: 27 [2018-09-23 19:35:04,644 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 19:35:04,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-23 19:35:04,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-23 19:35:04,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-23 19:35:04,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-23 19:35:04,649 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-09-23 19:35:04,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:04,649 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-23 19:35:04,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-23 19:35:04,650 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-23 19:35:04,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-23 19:35:04,650 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:04,650 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1, 1] [2018-09-23 19:35:04,651 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:04,651 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:04,651 INFO L82 PathProgramCache]: Analyzing trace with hash 250956168, now seen corresponding path program 23 times [2018-09-23 19:35:04,651 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:04,651 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:04,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:04,652 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:04,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:04,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:05,673 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 19:35:05,673 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:05,674 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:35:05,687 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:35:05,741 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-23 19:35:05,741 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:05,743 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:05,753 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 19:35:05,784 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:05,784 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-23 19:35:05,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-23 19:35:05,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-23 19:35:05,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-23 19:35:05,785 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 26 states. [2018-09-23 19:35:06,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:06,268 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-09-23 19:35:06,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-23 19:35:06,269 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 26 [2018-09-23 19:35:06,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:06,269 INFO L225 Difference]: With dead ends: 30 [2018-09-23 19:35:06,269 INFO L226 Difference]: Without dead ends: 28 [2018-09-23 19:35:06,271 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-23 19:35:06,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-23 19:35:06,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-23 19:35:06,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-23 19:35:06,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-09-23 19:35:06,277 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-09-23 19:35:06,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:06,278 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-09-23 19:35:06,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-23 19:35:06,278 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-09-23 19:35:06,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-23 19:35:06,278 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:06,279 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1, 1] [2018-09-23 19:35:06,279 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:06,279 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:06,279 INFO L82 PathProgramCache]: Analyzing trace with hash -810295359, now seen corresponding path program 24 times [2018-09-23 19:35:06,279 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:06,281 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:06,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:06,282 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:06,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:06,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:07,200 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 19:35:07,201 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:07,201 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 19:35:07,208 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:35:07,252 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-23 19:35:07,252 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:07,255 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:07,265 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 19:35:07,291 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:07,291 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-23 19:35:07,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-23 19:35:07,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-23 19:35:07,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-23 19:35:07,292 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 27 states. [2018-09-23 19:35:07,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:07,358 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-23 19:35:07,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-23 19:35:07,358 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 27 [2018-09-23 19:35:07,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:07,359 INFO L225 Difference]: With dead ends: 31 [2018-09-23 19:35:07,359 INFO L226 Difference]: Without dead ends: 29 [2018-09-23 19:35:07,360 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-23 19:35:07,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-23 19:35:07,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-23 19:35:07,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-23 19:35:07,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-23 19:35:07,364 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-09-23 19:35:07,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:07,365 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-23 19:35:07,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-23 19:35:07,365 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-23 19:35:07,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-23 19:35:07,366 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:07,366 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1, 1] [2018-09-23 19:35:07,366 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:07,366 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:07,366 INFO L82 PathProgramCache]: Analyzing trace with hash 650645672, now seen corresponding path program 25 times [2018-09-23 19:35:07,366 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:07,366 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:07,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:07,367 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:07,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:07,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:07,941 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 19:35:07,942 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:07,942 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:35:07,950 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:35:07,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:08,003 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:08,014 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 19:35:08,044 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:08,045 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-23 19:35:08,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-23 19:35:08,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-23 19:35:08,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-23 19:35:08,046 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 28 states. [2018-09-23 19:35:08,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:08,105 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-09-23 19:35:08,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-23 19:35:08,106 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 28 [2018-09-23 19:35:08,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:08,106 INFO L225 Difference]: With dead ends: 32 [2018-09-23 19:35:08,106 INFO L226 Difference]: Without dead ends: 30 [2018-09-23 19:35:08,107 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 19:35:08,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-23 19:35:08,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-23 19:35:08,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:35:08,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-09-23 19:35:08,111 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-09-23 19:35:08,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:08,111 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-09-23 19:35:08,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-23 19:35:08,111 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-09-23 19:35:08,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-23 19:35:08,112 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:08,112 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1, 1] [2018-09-23 19:35:08,112 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:08,113 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:08,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1304822623, now seen corresponding path program 26 times [2018-09-23 19:35:08,113 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:08,113 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:08,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:08,114 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:35:08,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:08,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:09,686 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 19:35:09,687 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:09,687 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:35:09,695 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:35:09,747 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:35:09,748 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:09,750 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:09,760 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 19:35:09,788 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:09,788 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-23 19:35:09,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-23 19:35:09,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-23 19:35:09,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-23 19:35:09,789 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 29 states. [2018-09-23 19:35:10,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:10,026 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-23 19:35:10,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-23 19:35:10,027 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 29 [2018-09-23 19:35:10,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:10,027 INFO L225 Difference]: With dead ends: 33 [2018-09-23 19:35:10,027 INFO L226 Difference]: Without dead ends: 31 [2018-09-23 19:35:10,028 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-23 19:35:10,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-23 19:35:10,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-23 19:35:10,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-23 19:35:10,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-23 19:35:10,032 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-09-23 19:35:10,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:10,032 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-23 19:35:10,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-23 19:35:10,033 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-23 19:35:10,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-23 19:35:10,033 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:10,033 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1, 1] [2018-09-23 19:35:10,033 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:10,033 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:10,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1794797624, now seen corresponding path program 27 times [2018-09-23 19:35:10,034 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:10,034 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:10,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:10,034 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:10,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:10,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:11,209 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 19:35:11,209 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:11,210 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:35:11,219 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:35:11,268 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-23 19:35:11,268 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:11,270 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:11,282 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 19:35:11,307 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:11,308 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-23 19:35:11,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-23 19:35:11,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-23 19:35:11,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-23 19:35:11,309 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 30 states. [2018-09-23 19:35:11,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:11,358 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-09-23 19:35:11,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-23 19:35:11,359 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 30 [2018-09-23 19:35:11,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:11,360 INFO L225 Difference]: With dead ends: 34 [2018-09-23 19:35:11,360 INFO L226 Difference]: Without dead ends: 32 [2018-09-23 19:35:11,360 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-23 19:35:11,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-23 19:35:11,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-23 19:35:11,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:35:11,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-09-23 19:35:11,364 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-09-23 19:35:11,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:11,364 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-09-23 19:35:11,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-23 19:35:11,364 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-09-23 19:35:11,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-23 19:35:11,365 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:11,365 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1, 1] [2018-09-23 19:35:11,365 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:11,366 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:11,366 INFO L82 PathProgramCache]: Analyzing trace with hash 195846529, now seen corresponding path program 28 times [2018-09-23 19:35:11,366 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:11,366 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:11,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:11,367 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:11,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:11,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:12,220 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 19:35:12,220 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:12,221 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 19:35:12,234 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:35:12,279 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:35:12,279 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:12,281 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:12,290 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 19:35:12,310 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:12,310 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-23 19:35:12,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-23 19:35:12,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-23 19:35:12,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-23 19:35:12,311 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 31 states. [2018-09-23 19:35:12,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:12,363 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-23 19:35:12,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-23 19:35:12,363 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 31 [2018-09-23 19:35:12,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:12,364 INFO L225 Difference]: With dead ends: 35 [2018-09-23 19:35:12,364 INFO L226 Difference]: Without dead ends: 33 [2018-09-23 19:35:12,365 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-23 19:35:12,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-23 19:35:12,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-23 19:35:12,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-23 19:35:12,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-23 19:35:12,369 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-09-23 19:35:12,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:12,370 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-23 19:35:12,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-23 19:35:12,370 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-23 19:35:12,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-23 19:35:12,371 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:12,371 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1, 1] [2018-09-23 19:35:12,371 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:12,371 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:12,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1776273128, now seen corresponding path program 29 times [2018-09-23 19:35:12,372 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:12,372 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:12,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:12,373 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:12,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:12,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:12,982 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 19:35:12,983 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:12,983 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 19:35:13,004 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:35:13,059 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-23 19:35:13,060 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:13,062 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:13,073 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 19:35:13,104 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:13,104 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-23 19:35:13,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-23 19:35:13,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-23 19:35:13,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-23 19:35:13,105 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 32 states. [2018-09-23 19:35:13,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:13,294 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-09-23 19:35:13,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-23 19:35:13,294 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 32 [2018-09-23 19:35:13,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:13,294 INFO L225 Difference]: With dead ends: 36 [2018-09-23 19:35:13,294 INFO L226 Difference]: Without dead ends: 34 [2018-09-23 19:35:13,295 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-23 19:35:13,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-23 19:35:13,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-23 19:35:13,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:35:13,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-09-23 19:35:13,298 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-09-23 19:35:13,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:13,299 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-09-23 19:35:13,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-23 19:35:13,299 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-09-23 19:35:13,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-23 19:35:13,300 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:13,300 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1, 1] [2018-09-23 19:35:13,300 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:13,300 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:13,300 INFO L82 PathProgramCache]: Analyzing trace with hash -770109855, now seen corresponding path program 30 times [2018-09-23 19:35:13,301 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:13,301 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:13,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:13,301 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:13,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:13,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:13,936 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 19:35:13,936 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:13,936 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 19:35:13,946 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:35:14,008 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-23 19:35:14,008 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:14,010 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:14,021 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 19:35:14,050 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:14,050 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-23 19:35:14,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-23 19:35:14,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-23 19:35:14,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 19:35:14,051 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 33 states. [2018-09-23 19:35:14,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:14,198 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-23 19:35:14,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-23 19:35:14,198 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 33 [2018-09-23 19:35:14,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:14,199 INFO L225 Difference]: With dead ends: 37 [2018-09-23 19:35:14,199 INFO L226 Difference]: Without dead ends: 35 [2018-09-23 19:35:14,200 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 19:35:14,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-23 19:35:14,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-23 19:35:14,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-23 19:35:14,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-23 19:35:14,203 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-09-23 19:35:14,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:14,203 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-23 19:35:14,203 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-23 19:35:14,204 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-23 19:35:14,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-23 19:35:14,204 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:14,204 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1, 1] [2018-09-23 19:35:14,204 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:14,204 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:14,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1896396296, now seen corresponding path program 31 times [2018-09-23 19:35:14,205 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:14,205 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:14,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:14,205 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:14,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:14,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:15,041 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 19:35:15,041 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:15,041 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:35:15,050 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:35:15,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:15,106 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:15,124 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 19:35:15,156 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:15,157 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-23 19:35:15,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-23 19:35:15,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-23 19:35:15,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 19:35:15,158 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 34 states. [2018-09-23 19:35:15,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:15,404 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-09-23 19:35:15,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-23 19:35:15,405 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 34 [2018-09-23 19:35:15,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:15,406 INFO L225 Difference]: With dead ends: 38 [2018-09-23 19:35:15,406 INFO L226 Difference]: Without dead ends: 36 [2018-09-23 19:35:15,407 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 19:35:15,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-23 19:35:15,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-23 19:35:15,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-23 19:35:15,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-09-23 19:35:15,411 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-09-23 19:35:15,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:15,411 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-09-23 19:35:15,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-23 19:35:15,411 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-09-23 19:35:15,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-23 19:35:15,412 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:15,412 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1, 1] [2018-09-23 19:35:15,412 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:15,412 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:15,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1341258943, now seen corresponding path program 32 times [2018-09-23 19:35:15,413 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:15,413 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:15,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:15,414 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:35:15,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:15,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:16,095 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 19:35:16,096 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:16,096 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 19:35:16,103 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:35:16,152 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:35:16,152 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:16,154 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:16,167 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 19:35:16,189 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:16,189 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-23 19:35:16,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-23 19:35:16,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-23 19:35:16,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 19:35:16,190 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 35 states. [2018-09-23 19:35:16,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:16,250 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-23 19:35:16,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-23 19:35:16,250 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 35 [2018-09-23 19:35:16,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:16,251 INFO L225 Difference]: With dead ends: 39 [2018-09-23 19:35:16,251 INFO L226 Difference]: Without dead ends: 37 [2018-09-23 19:35:16,252 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 19:35:16,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-23 19:35:16,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-23 19:35:16,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-23 19:35:16,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-23 19:35:16,256 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-09-23 19:35:16,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:16,257 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-23 19:35:16,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-23 19:35:16,257 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-23 19:35:16,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-23 19:35:16,257 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:16,257 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1, 1] [2018-09-23 19:35:16,258 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:16,258 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:16,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1370643752, now seen corresponding path program 33 times [2018-09-23 19:35:16,258 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:16,258 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:16,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:16,260 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:16,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:16,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:16,780 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 19:35:16,781 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:16,781 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:35:16,788 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:35:16,851 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-23 19:35:16,852 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:16,854 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:16,863 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 19:35:16,892 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:16,893 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-23 19:35:16,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-23 19:35:16,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-23 19:35:16,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 19:35:16,894 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 36 states. [2018-09-23 19:35:16,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:16,964 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-09-23 19:35:16,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-23 19:35:16,964 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 36 [2018-09-23 19:35:16,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:16,965 INFO L225 Difference]: With dead ends: 40 [2018-09-23 19:35:16,965 INFO L226 Difference]: Without dead ends: 38 [2018-09-23 19:35:16,966 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 19:35:16,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-23 19:35:16,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-23 19:35:16,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-23 19:35:16,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-09-23 19:35:16,970 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-09-23 19:35:16,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:16,970 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-09-23 19:35:16,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-23 19:35:16,970 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-09-23 19:35:16,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-23 19:35:16,970 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:16,970 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1, 1] [2018-09-23 19:35:16,970 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:16,971 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:16,971 INFO L82 PathProgramCache]: Analyzing trace with hash -459718623, now seen corresponding path program 34 times [2018-09-23 19:35:16,971 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:16,971 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:16,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:16,971 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:16,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:16,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:18,103 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 19:35:18,104 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:18,104 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 19:35:18,112 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:35:18,175 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:35:18,175 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:18,177 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:18,189 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 19:35:18,209 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:18,210 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-23 19:35:18,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-23 19:35:18,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-23 19:35:18,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 19:35:18,211 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 37 states. [2018-09-23 19:35:18,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:18,277 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-23 19:35:18,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-23 19:35:18,278 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 37 [2018-09-23 19:35:18,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:18,279 INFO L225 Difference]: With dead ends: 41 [2018-09-23 19:35:18,279 INFO L226 Difference]: Without dead ends: 39 [2018-09-23 19:35:18,280 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 19:35:18,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-23 19:35:18,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-23 19:35:18,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-23 19:35:18,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-23 19:35:18,286 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-09-23 19:35:18,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:18,286 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-23 19:35:18,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-23 19:35:18,286 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-23 19:35:18,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-23 19:35:18,287 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:18,287 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1, 1] [2018-09-23 19:35:18,287 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:18,287 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:18,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1366377400, now seen corresponding path program 35 times [2018-09-23 19:35:18,288 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:18,288 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:18,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:18,289 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:18,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:18,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:19,371 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 19:35:19,372 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:19,372 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 19:35:19,378 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:35:19,445 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-23 19:35:19,445 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:19,447 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:19,456 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 19:35:19,476 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:19,477 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-23 19:35:19,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-23 19:35:19,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-23 19:35:19,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 19:35:19,478 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 38 states. [2018-09-23 19:35:19,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:19,551 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-09-23 19:35:19,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-23 19:35:19,551 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 38 [2018-09-23 19:35:19,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:19,552 INFO L225 Difference]: With dead ends: 42 [2018-09-23 19:35:19,552 INFO L226 Difference]: Without dead ends: 40 [2018-09-23 19:35:19,553 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 19:35:19,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-23 19:35:19,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-23 19:35:19,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-23 19:35:19,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-09-23 19:35:19,556 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-09-23 19:35:19,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:19,556 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-09-23 19:35:19,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-23 19:35:19,557 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-09-23 19:35:19,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-23 19:35:19,557 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:19,557 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1, 1] [2018-09-23 19:35:19,557 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:19,557 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:19,558 INFO L82 PathProgramCache]: Analyzing trace with hash 591971585, now seen corresponding path program 36 times [2018-09-23 19:35:19,558 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:19,558 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:19,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:19,558 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:19,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:19,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:20,206 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 19:35:20,206 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:20,206 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:35:20,213 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:35:20,279 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-23 19:35:20,280 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:20,282 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:20,292 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 19:35:20,313 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:20,313 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-23 19:35:20,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-23 19:35:20,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-23 19:35:20,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-23 19:35:20,314 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 39 states. [2018-09-23 19:35:20,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:20,363 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-23 19:35:20,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-23 19:35:20,364 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 39 [2018-09-23 19:35:20,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:20,365 INFO L225 Difference]: With dead ends: 43 [2018-09-23 19:35:20,365 INFO L226 Difference]: Without dead ends: 41 [2018-09-23 19:35:20,366 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 19:35:20,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-23 19:35:20,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-23 19:35:20,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-23 19:35:20,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-23 19:35:20,369 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-09-23 19:35:20,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:20,369 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-23 19:35:20,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-23 19:35:20,369 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-23 19:35:20,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-23 19:35:20,370 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:20,370 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1, 1] [2018-09-23 19:35:20,370 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:20,370 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:20,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1171247976, now seen corresponding path program 37 times [2018-09-23 19:35:20,371 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:20,371 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:20,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:20,371 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:20,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:20,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:21,423 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 19:35:21,423 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:21,423 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:35:21,430 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:35:21,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:21,489 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:21,500 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 19:35:21,529 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:21,530 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-23 19:35:21,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-23 19:35:21,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-23 19:35:21,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 19:35:21,531 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 40 states. [2018-09-23 19:35:22,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:22,060 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-09-23 19:35:22,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-23 19:35:22,060 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 40 [2018-09-23 19:35:22,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:22,061 INFO L225 Difference]: With dead ends: 44 [2018-09-23 19:35:22,061 INFO L226 Difference]: Without dead ends: 42 [2018-09-23 19:35:22,061 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 19:35:22,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-23 19:35:22,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-23 19:35:22,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-23 19:35:22,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-09-23 19:35:22,063 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-09-23 19:35:22,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:22,064 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-09-23 19:35:22,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-23 19:35:22,064 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-09-23 19:35:22,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-23 19:35:22,064 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:22,065 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1, 1] [2018-09-23 19:35:22,065 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:22,065 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:22,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1948946913, now seen corresponding path program 38 times [2018-09-23 19:35:22,065 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:22,065 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:22,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:22,066 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:35:22,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:22,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:22,764 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 19:35:22,765 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:22,765 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:35:22,774 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:35:22,836 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:35:22,836 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:22,838 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:22,849 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 19:35:22,880 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:22,880 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-23 19:35:22,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-23 19:35:22,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-23 19:35:22,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 19:35:22,881 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 41 states. [2018-09-23 19:35:23,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:23,057 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-23 19:35:23,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-23 19:35:23,058 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 41 [2018-09-23 19:35:23,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:23,059 INFO L225 Difference]: With dead ends: 45 [2018-09-23 19:35:23,059 INFO L226 Difference]: Without dead ends: 43 [2018-09-23 19:35:23,060 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 19:35:23,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-23 19:35:23,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-23 19:35:23,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-23 19:35:23,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-23 19:35:23,063 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-09-23 19:35:23,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:23,063 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-23 19:35:23,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-23 19:35:23,064 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-23 19:35:23,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-23 19:35:23,064 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:23,064 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1, 1] [2018-09-23 19:35:23,064 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:23,064 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:23,065 INFO L82 PathProgramCache]: Analyzing trace with hash 287810184, now seen corresponding path program 39 times [2018-09-23 19:35:23,065 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:23,065 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:23,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:23,065 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:23,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:23,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:24,213 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 19:35:24,214 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:24,214 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 19:35:24,222 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:35:24,297 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-09-23 19:35:24,297 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:24,300 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:24,309 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 19:35:24,330 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:24,330 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-23 19:35:24,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-23 19:35:24,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-23 19:35:24,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 19:35:24,331 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 42 states. [2018-09-23 19:35:24,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:24,421 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-09-23 19:35:24,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-23 19:35:24,421 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 42 [2018-09-23 19:35:24,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:24,422 INFO L225 Difference]: With dead ends: 46 [2018-09-23 19:35:24,422 INFO L226 Difference]: Without dead ends: 44 [2018-09-23 19:35:24,423 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 19:35:24,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-23 19:35:24,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-23 19:35:24,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-23 19:35:24,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-09-23 19:35:24,426 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-09-23 19:35:24,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:24,426 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-09-23 19:35:24,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-23 19:35:24,426 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-09-23 19:35:24,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-23 19:35:24,427 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:24,427 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1, 1] [2018-09-23 19:35:24,427 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:24,427 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:24,427 INFO L82 PathProgramCache]: Analyzing trace with hash 332179137, now seen corresponding path program 40 times [2018-09-23 19:35:24,427 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:24,428 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:24,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:24,428 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:24,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:24,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:25,226 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 19:35:25,226 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:25,226 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:35:25,234 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:35:25,300 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:35:25,300 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:25,302 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:25,313 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 19:35:25,339 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:25,340 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-23 19:35:25,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-23 19:35:25,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-23 19:35:25,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 19:35:25,341 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 43 states. [2018-09-23 19:35:25,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:25,450 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-23 19:35:25,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-23 19:35:25,450 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 43 [2018-09-23 19:35:25,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:25,451 INFO L225 Difference]: With dead ends: 47 [2018-09-23 19:35:25,451 INFO L226 Difference]: Without dead ends: 45 [2018-09-23 19:35:25,452 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 19:35:25,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-23 19:35:25,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-23 19:35:25,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-23 19:35:25,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-23 19:35:25,454 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-09-23 19:35:25,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:25,454 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-23 19:35:25,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-23 19:35:25,454 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-23 19:35:25,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-23 19:35:25,455 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:25,455 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1, 1] [2018-09-23 19:35:25,455 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:25,455 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:25,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1707616680, now seen corresponding path program 41 times [2018-09-23 19:35:25,455 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:25,455 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:25,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:25,456 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:25,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:25,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:26,577 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 19:35:26,577 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:26,577 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 19:35:26,585 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:35:26,761 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-23 19:35:26,762 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:26,765 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:26,777 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 19:35:26,800 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:26,801 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-23 19:35:26,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-23 19:35:26,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-23 19:35:26,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 19:35:26,802 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 44 states. [2018-09-23 19:35:26,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:26,880 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-09-23 19:35:26,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-23 19:35:26,880 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 44 [2018-09-23 19:35:26,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:26,881 INFO L225 Difference]: With dead ends: 48 [2018-09-23 19:35:26,881 INFO L226 Difference]: Without dead ends: 46 [2018-09-23 19:35:26,882 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 19:35:26,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-23 19:35:26,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-23 19:35:26,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-23 19:35:26,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-09-23 19:35:26,885 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-09-23 19:35:26,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:26,885 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-09-23 19:35:26,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-23 19:35:26,886 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-09-23 19:35:26,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-23 19:35:26,886 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:26,886 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1, 1] [2018-09-23 19:35:26,886 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:26,886 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:26,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1396507553, now seen corresponding path program 42 times [2018-09-23 19:35:26,887 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:26,887 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:26,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:26,887 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:26,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:26,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:27,733 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 19:35:27,733 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:27,733 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:35:27,741 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:35:27,815 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-09-23 19:35:27,815 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:27,818 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:27,829 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 19:35:27,850 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:27,851 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-23 19:35:27,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-23 19:35:27,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-23 19:35:27,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 19:35:27,852 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 45 states. [2018-09-23 19:35:27,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:27,945 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-23 19:35:27,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-23 19:35:27,945 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 45 [2018-09-23 19:35:27,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:27,946 INFO L225 Difference]: With dead ends: 49 [2018-09-23 19:35:27,946 INFO L226 Difference]: Without dead ends: 47 [2018-09-23 19:35:27,948 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 19:35:27,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-23 19:35:27,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-23 19:35:27,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-23 19:35:27,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-23 19:35:27,951 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-09-23 19:35:27,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:27,951 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-23 19:35:27,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-23 19:35:27,951 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-23 19:35:27,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-23 19:35:27,952 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:27,952 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1, 1] [2018-09-23 19:35:27,952 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:27,952 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:27,952 INFO L82 PathProgramCache]: Analyzing trace with hash 342059208, now seen corresponding path program 43 times [2018-09-23 19:35:27,952 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:27,952 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:27,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:27,953 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:27,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:27,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:28,906 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 19:35:28,906 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:28,906 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 19:35:28,914 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:35:28,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:28,987 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:28,997 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 19:35:29,018 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:29,019 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-23 19:35:29,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-23 19:35:29,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-23 19:35:29,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 19:35:29,020 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 46 states. [2018-09-23 19:35:29,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:29,170 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-09-23 19:35:29,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-23 19:35:29,171 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 46 [2018-09-23 19:35:29,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:29,171 INFO L225 Difference]: With dead ends: 50 [2018-09-23 19:35:29,172 INFO L226 Difference]: Without dead ends: 48 [2018-09-23 19:35:29,173 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 19:35:29,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-23 19:35:29,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-09-23 19:35:29,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-23 19:35:29,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-09-23 19:35:29,176 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-09-23 19:35:29,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:29,176 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-09-23 19:35:29,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-23 19:35:29,176 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-09-23 19:35:29,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-23 19:35:29,177 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:29,177 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1, 1] [2018-09-23 19:35:29,177 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:29,178 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:29,178 INFO L82 PathProgramCache]: Analyzing trace with hash 2013898881, now seen corresponding path program 44 times [2018-09-23 19:35:29,178 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:29,178 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:29,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:29,179 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:35:29,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:29,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:30,018 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 19:35:30,018 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:30,018 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 19:35:30,026 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:35:30,093 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:35:30,094 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:30,096 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:30,107 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 19:35:30,131 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:30,131 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-23 19:35:30,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-23 19:35:30,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-23 19:35:30,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 19:35:30,132 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 47 states. [2018-09-23 19:35:30,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:30,199 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-23 19:35:30,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-23 19:35:30,200 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 47 [2018-09-23 19:35:30,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:30,200 INFO L225 Difference]: With dead ends: 51 [2018-09-23 19:35:30,200 INFO L226 Difference]: Without dead ends: 49 [2018-09-23 19:35:30,201 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 19:35:30,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-23 19:35:30,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-23 19:35:30,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-23 19:35:30,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-23 19:35:30,204 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-09-23 19:35:30,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:30,204 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-23 19:35:30,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-23 19:35:30,205 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-23 19:35:30,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-23 19:35:30,205 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:30,205 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1, 1] [2018-09-23 19:35:30,205 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:30,206 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:30,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1993646104, now seen corresponding path program 45 times [2018-09-23 19:35:30,206 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:30,206 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:30,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:30,207 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:30,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:30,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:31,575 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 19:35:31,575 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:31,575 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:35:31,584 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:35:31,668 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-23 19:35:31,669 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:31,673 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:31,685 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 19:35:31,715 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:31,716 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-23 19:35:31,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-23 19:35:31,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-23 19:35:31,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 19:35:31,717 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 48 states. [2018-09-23 19:35:32,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:32,144 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-09-23 19:35:32,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-23 19:35:32,144 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 48 [2018-09-23 19:35:32,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:32,145 INFO L225 Difference]: With dead ends: 52 [2018-09-23 19:35:32,145 INFO L226 Difference]: Without dead ends: 50 [2018-09-23 19:35:32,146 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 19:35:32,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-23 19:35:32,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-23 19:35:32,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-23 19:35:32,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-09-23 19:35:32,148 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-09-23 19:35:32,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:32,148 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-09-23 19:35:32,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-23 19:35:32,148 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-09-23 19:35:32,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-23 19:35:32,149 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:32,149 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1, 1] [2018-09-23 19:35:32,149 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:32,149 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:32,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1673489055, now seen corresponding path program 46 times [2018-09-23 19:35:32,149 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:32,150 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:32,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:32,150 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:32,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:32,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:33,130 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 19:35:33,130 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:33,130 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:35:33,139 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:35:33,212 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:35:33,212 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:33,216 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:33,228 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 19:35:33,257 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:33,257 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-23 19:35:33,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-23 19:35:33,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-23 19:35:33,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-23 19:35:33,258 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 49 states. [2018-09-23 19:35:33,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:33,328 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-23 19:35:33,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-23 19:35:33,329 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 49 [2018-09-23 19:35:33,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:33,330 INFO L225 Difference]: With dead ends: 53 [2018-09-23 19:35:33,330 INFO L226 Difference]: Without dead ends: 51 [2018-09-23 19:35:33,331 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 19:35:33,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-23 19:35:33,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-23 19:35:33,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-23 19:35:33,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-23 19:35:33,334 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-09-23 19:35:33,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:33,334 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-23 19:35:33,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-23 19:35:33,334 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-23 19:35:33,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-23 19:35:33,335 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:33,335 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1, 1] [2018-09-23 19:35:33,335 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:33,335 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:33,335 INFO L82 PathProgramCache]: Analyzing trace with hash -338555128, now seen corresponding path program 47 times [2018-09-23 19:35:33,335 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:33,335 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:33,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:33,336 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:33,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:33,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:34,322 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 19:35:34,323 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:34,323 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:35:34,330 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:35:34,417 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-23 19:35:34,417 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:34,421 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:34,434 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 19:35:34,462 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:34,462 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-23 19:35:34,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-23 19:35:34,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-23 19:35:34,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 19:35:34,463 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 50 states. [2018-09-23 19:35:34,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:34,557 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-09-23 19:35:34,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-23 19:35:34,558 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 50 [2018-09-23 19:35:34,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:34,559 INFO L225 Difference]: With dead ends: 54 [2018-09-23 19:35:34,559 INFO L226 Difference]: Without dead ends: 52 [2018-09-23 19:35:34,560 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 19:35:34,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-23 19:35:34,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-23 19:35:34,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-23 19:35:34,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-09-23 19:35:34,562 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-09-23 19:35:34,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:34,562 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-09-23 19:35:34,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-23 19:35:34,563 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-09-23 19:35:34,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-23 19:35:34,563 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:34,563 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1, 1] [2018-09-23 19:35:34,564 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:34,564 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:34,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1905276351, now seen corresponding path program 48 times [2018-09-23 19:35:34,564 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:34,564 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:34,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:34,565 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:34,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:34,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:35,635 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 19:35:35,635 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:35,635 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:35:35,643 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:35:35,734 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-23 19:35:35,734 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:35,737 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:35,747 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 19:35:35,767 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:35,767 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-23 19:35:35,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-23 19:35:35,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-23 19:35:35,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-23 19:35:35,768 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 51 states. [2018-09-23 19:35:35,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:35,885 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-23 19:35:35,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-23 19:35:35,886 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 51 [2018-09-23 19:35:35,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:35,887 INFO L225 Difference]: With dead ends: 55 [2018-09-23 19:35:35,887 INFO L226 Difference]: Without dead ends: 53 [2018-09-23 19:35:35,888 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 19:35:35,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-23 19:35:35,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-23 19:35:35,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-23 19:35:35,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-23 19:35:35,891 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-09-23 19:35:35,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:35,891 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-23 19:35:35,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-23 19:35:35,892 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-23 19:35:35,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-23 19:35:35,892 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:35,892 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1, 1] [2018-09-23 19:35:35,892 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:35,892 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:35,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1065973288, now seen corresponding path program 49 times [2018-09-23 19:35:35,892 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:35,893 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:35,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:35,893 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:35,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:35,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:37,203 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 19:35:37,203 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:37,203 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:35:37,211 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:35:37,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:37,290 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:37,302 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 19:35:37,327 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:37,327 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-23 19:35:37,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-23 19:35:37,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-23 19:35:37,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 19:35:37,328 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 52 states. [2018-09-23 19:35:37,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:37,413 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-09-23 19:35:37,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-23 19:35:37,414 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 52 [2018-09-23 19:35:37,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:37,415 INFO L225 Difference]: With dead ends: 56 [2018-09-23 19:35:37,415 INFO L226 Difference]: Without dead ends: 54 [2018-09-23 19:35:37,415 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 19:35:37,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-23 19:35:37,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-09-23 19:35:37,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-23 19:35:37,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-09-23 19:35:37,418 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-09-23 19:35:37,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:37,418 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-09-23 19:35:37,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-23 19:35:37,418 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-09-23 19:35:37,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-23 19:35:37,418 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:37,419 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1, 1] [2018-09-23 19:35:37,419 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:37,419 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:37,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1314568415, now seen corresponding path program 50 times [2018-09-23 19:35:37,419 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:37,419 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:37,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:37,420 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:35:37,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:37,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:38,613 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 19:35:38,614 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:38,614 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:35:38,638 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:35:38,718 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:35:38,718 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:38,721 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:38,736 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 19:35:38,768 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:38,768 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-23 19:35:38,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-23 19:35:38,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-23 19:35:38,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 19:35:38,770 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 53 states. [2018-09-23 19:35:38,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:38,943 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-23 19:35:38,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-23 19:35:38,943 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 53 [2018-09-23 19:35:38,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:38,944 INFO L225 Difference]: With dead ends: 57 [2018-09-23 19:35:38,944 INFO L226 Difference]: Without dead ends: 55 [2018-09-23 19:35:38,945 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 19:35:38,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-23 19:35:38,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-23 19:35:38,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-23 19:35:38,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-23 19:35:38,947 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-09-23 19:35:38,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:38,947 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-23 19:35:38,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-23 19:35:38,947 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-23 19:35:38,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-23 19:35:38,948 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:38,948 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1, 1] [2018-09-23 19:35:38,948 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:38,948 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:38,948 INFO L82 PathProgramCache]: Analyzing trace with hash -2096917176, now seen corresponding path program 51 times [2018-09-23 19:35:38,948 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:38,949 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:38,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:38,949 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:38,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:38,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:40,414 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 19:35:40,414 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:40,414 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 19:35:40,422 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:35:40,518 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-09-23 19:35:40,519 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:40,521 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:40,533 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 19:35:40,564 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:40,565 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-23 19:35:40,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-23 19:35:40,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-23 19:35:40,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 19:35:40,568 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 54 states. [2018-09-23 19:35:40,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:40,876 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-09-23 19:35:40,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-23 19:35:40,877 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 54 [2018-09-23 19:35:40,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:40,877 INFO L225 Difference]: With dead ends: 58 [2018-09-23 19:35:40,878 INFO L226 Difference]: Without dead ends: 56 [2018-09-23 19:35:40,878 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 19:35:40,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-23 19:35:40,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-23 19:35:40,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-23 19:35:40,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-09-23 19:35:40,881 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-09-23 19:35:40,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:40,881 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-09-23 19:35:40,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-23 19:35:40,882 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-09-23 19:35:40,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-23 19:35:40,882 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:40,882 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1, 1] [2018-09-23 19:35:40,882 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:40,883 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:40,883 INFO L82 PathProgramCache]: Analyzing trace with hash -579924991, now seen corresponding path program 52 times [2018-09-23 19:35:40,883 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:40,883 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:40,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:40,884 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:40,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:40,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:42,741 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 19:35:42,741 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:42,741 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 19:35:42,750 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:35:42,830 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:35:42,830 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:42,833 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:42,847 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 19:35:42,871 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:42,871 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-23 19:35:42,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-23 19:35:42,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-23 19:35:42,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-23 19:35:42,872 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 55 states. [2018-09-23 19:35:42,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:42,980 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-23 19:35:42,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-23 19:35:42,980 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 55 [2018-09-23 19:35:42,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:42,981 INFO L225 Difference]: With dead ends: 59 [2018-09-23 19:35:42,981 INFO L226 Difference]: Without dead ends: 57 [2018-09-23 19:35:42,982 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-23 19:35:42,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-23 19:35:42,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-23 19:35:42,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-23 19:35:42,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-09-23 19:35:42,985 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-09-23 19:35:42,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:42,985 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-09-23 19:35:42,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-23 19:35:42,985 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-09-23 19:35:42,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-23 19:35:42,985 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:42,986 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1, 1] [2018-09-23 19:35:42,986 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:42,986 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:42,986 INFO L82 PathProgramCache]: Analyzing trace with hash -797807512, now seen corresponding path program 53 times [2018-09-23 19:35:42,986 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:42,986 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:42,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:42,987 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:42,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:43,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:44,187 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 19:35:44,187 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:44,187 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 19:35:44,195 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:35:44,320 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-09-23 19:35:44,320 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:44,324 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:44,337 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 19:35:44,368 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:44,368 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-23 19:35:44,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-23 19:35:44,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-23 19:35:44,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 19:35:44,369 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 56 states. [2018-09-23 19:35:44,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:44,460 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-09-23 19:35:44,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-23 19:35:44,460 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 56 [2018-09-23 19:35:44,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:44,461 INFO L225 Difference]: With dead ends: 60 [2018-09-23 19:35:44,462 INFO L226 Difference]: Without dead ends: 58 [2018-09-23 19:35:44,462 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 19:35:44,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-23 19:35:44,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-23 19:35:44,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-23 19:35:44,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-09-23 19:35:44,465 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-09-23 19:35:44,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:44,465 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-09-23 19:35:44,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-23 19:35:44,465 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-09-23 19:35:44,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-23 19:35:44,465 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:44,465 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1, 1] [2018-09-23 19:35:44,466 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:44,466 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:44,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1037768929, now seen corresponding path program 54 times [2018-09-23 19:35:44,466 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:44,466 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:44,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:44,467 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:44,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:44,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:45,742 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 19:35:45,742 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:45,742 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:35:45,749 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:35:45,850 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-09-23 19:35:45,850 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:45,853 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:45,865 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 19:35:45,887 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:45,887 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-23 19:35:45,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-23 19:35:45,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-23 19:35:45,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-23 19:35:45,888 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 57 states. [2018-09-23 19:35:46,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:46,030 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-23 19:35:46,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-23 19:35:46,031 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 57 [2018-09-23 19:35:46,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:46,031 INFO L225 Difference]: With dead ends: 61 [2018-09-23 19:35:46,032 INFO L226 Difference]: Without dead ends: 59 [2018-09-23 19:35:46,032 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-23 19:35:46,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-23 19:35:46,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-23 19:35:46,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-23 19:35:46,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-23 19:35:46,034 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-09-23 19:35:46,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:46,035 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-23 19:35:46,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-23 19:35:46,035 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-23 19:35:46,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-23 19:35:46,035 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:46,035 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1, 1] [2018-09-23 19:35:46,036 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:46,036 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:46,036 INFO L82 PathProgramCache]: Analyzing trace with hash 2106063752, now seen corresponding path program 55 times [2018-09-23 19:35:46,036 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:46,036 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:46,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:46,037 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:46,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:46,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:47,570 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 19:35:47,570 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:47,571 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 19:35:47,579 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:35:47,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:47,668 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:47,684 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 19:35:47,714 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:47,714 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-23 19:35:47,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-23 19:35:47,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-23 19:35:47,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 19:35:47,715 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 58 states. [2018-09-23 19:35:47,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:47,946 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-09-23 19:35:47,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-23 19:35:47,947 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 58 [2018-09-23 19:35:47,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:47,947 INFO L225 Difference]: With dead ends: 62 [2018-09-23 19:35:47,948 INFO L226 Difference]: Without dead ends: 60 [2018-09-23 19:35:47,948 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 19:35:47,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-09-23 19:35:47,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-09-23 19:35:47,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-23 19:35:47,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-09-23 19:35:47,953 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-09-23 19:35:47,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:47,953 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-09-23 19:35:47,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-23 19:35:47,953 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-09-23 19:35:47,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-23 19:35:47,953 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:47,953 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1, 1] [2018-09-23 19:35:47,954 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:47,954 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:47,954 INFO L82 PathProgramCache]: Analyzing trace with hash 863464897, now seen corresponding path program 56 times [2018-09-23 19:35:47,954 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:47,954 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:47,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:47,955 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:35:47,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:47,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:49,252 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 19:35:49,252 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:49,252 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 19:35:49,261 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:35:49,374 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:35:49,374 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:49,378 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:49,389 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 19:35:49,410 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:49,410 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-23 19:35:49,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-23 19:35:49,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-23 19:35:49,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-23 19:35:49,411 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 59 states. [2018-09-23 19:35:49,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:49,549 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-23 19:35:49,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-23 19:35:49,550 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 59 [2018-09-23 19:35:49,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:49,551 INFO L225 Difference]: With dead ends: 63 [2018-09-23 19:35:49,551 INFO L226 Difference]: Without dead ends: 61 [2018-09-23 19:35:49,552 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 19:35:49,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-23 19:35:49,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-23 19:35:49,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-23 19:35:49,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-09-23 19:35:49,555 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-09-23 19:35:49,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:49,556 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-09-23 19:35:49,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-23 19:35:49,556 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-09-23 19:35:49,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-23 19:35:49,556 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:49,556 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1, 1] [2018-09-23 19:35:49,557 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:49,557 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:49,557 INFO L82 PathProgramCache]: Analyzing trace with hash 997606056, now seen corresponding path program 57 times [2018-09-23 19:35:49,557 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:49,557 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:49,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:49,558 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:49,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:49,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:50,890 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 19:35:50,890 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:50,891 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 19:35:50,897 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:35:51,007 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-09-23 19:35:51,007 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:51,012 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:51,028 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 19:35:51,060 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:51,060 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-23 19:35:51,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-23 19:35:51,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-23 19:35:51,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-23 19:35:51,062 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 60 states. [2018-09-23 19:35:52,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:52,126 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-09-23 19:35:52,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-23 19:35:52,127 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 60 [2018-09-23 19:35:52,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:52,127 INFO L225 Difference]: With dead ends: 64 [2018-09-23 19:35:52,127 INFO L226 Difference]: Without dead ends: 62 [2018-09-23 19:35:52,128 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 19:35:52,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-09-23 19:35:52,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-09-23 19:35:52,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-09-23 19:35:52,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-09-23 19:35:52,130 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-09-23 19:35:52,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:52,130 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-09-23 19:35:52,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-23 19:35:52,130 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-09-23 19:35:52,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-09-23 19:35:52,131 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:52,131 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1, 1] [2018-09-23 19:35:52,131 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:52,131 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:52,132 INFO L82 PathProgramCache]: Analyzing trace with hash 861014689, now seen corresponding path program 58 times [2018-09-23 19:35:52,132 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:52,132 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:52,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:52,132 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:52,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:52,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:53,885 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 19:35:53,885 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:53,885 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 19:35:53,894 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:35:53,984 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:35:53,985 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:53,989 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:54,004 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 19:35:54,025 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:54,025 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-23 19:35:54,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-23 19:35:54,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-23 19:35:54,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-23 19:35:54,027 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 61 states. [2018-09-23 19:35:54,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:54,138 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-23 19:35:54,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-23 19:35:54,138 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 61 [2018-09-23 19:35:54,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:54,139 INFO L225 Difference]: With dead ends: 65 [2018-09-23 19:35:54,139 INFO L226 Difference]: Without dead ends: 63 [2018-09-23 19:35:54,139 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-23 19:35:54,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-23 19:35:54,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-23 19:35:54,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-23 19:35:54,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-09-23 19:35:54,141 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-09-23 19:35:54,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:54,142 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-09-23 19:35:54,142 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-23 19:35:54,142 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-09-23 19:35:54,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-23 19:35:54,142 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:54,142 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1, 1] [2018-09-23 19:35:54,142 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:54,142 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:54,143 INFO L82 PathProgramCache]: Analyzing trace with hash 921649608, now seen corresponding path program 59 times [2018-09-23 19:35:54,143 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:54,143 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:54,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:54,143 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:54,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:54,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:56,051 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 19:35:56,051 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:56,052 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:35:56,060 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:35:56,177 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-09-23 19:35:56,177 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:56,181 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:56,193 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 19:35:56,214 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:56,214 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-23 19:35:56,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-23 19:35:56,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-23 19:35:56,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-23 19:35:56,215 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 62 states. [2018-09-23 19:35:56,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:56,333 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-09-23 19:35:56,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-23 19:35:56,334 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 62 [2018-09-23 19:35:56,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:56,335 INFO L225 Difference]: With dead ends: 66 [2018-09-23 19:35:56,335 INFO L226 Difference]: Without dead ends: 64 [2018-09-23 19:35:56,335 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-23 19:35:56,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-23 19:35:56,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-09-23 19:35:56,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-23 19:35:56,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-09-23 19:35:56,338 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-09-23 19:35:56,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:56,338 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-09-23 19:35:56,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-23 19:35:56,339 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-09-23 19:35:56,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-23 19:35:56,339 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:56,339 INFO L375 BasicCegarLoop]: trace histogram [60, 1, 1, 1] [2018-09-23 19:35:56,339 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:56,339 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:56,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1493635199, now seen corresponding path program 60 times [2018-09-23 19:35:56,339 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:56,340 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:56,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:56,340 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:56,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:56,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:58,031 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 19:35:58,031 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:58,031 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 19:35:58,039 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:35:58,394 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-23 19:35:58,395 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:58,398 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:58,414 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 19:35:58,442 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:58,442 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-09-23 19:35:58,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-23 19:35:58,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-23 19:35:58,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-23 19:35:58,444 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 63 states. [2018-09-23 19:35:58,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:58,576 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-23 19:35:58,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-23 19:35:58,576 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 63 [2018-09-23 19:35:58,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:58,577 INFO L225 Difference]: With dead ends: 67 [2018-09-23 19:35:58,577 INFO L226 Difference]: Without dead ends: 65 [2018-09-23 19:35:58,578 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-23 19:35:58,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-23 19:35:58,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-23 19:35:58,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-23 19:35:58,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-09-23 19:35:58,581 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-09-23 19:35:58,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:58,581 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-09-23 19:35:58,581 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-23 19:35:58,581 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-09-23 19:35:58,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-23 19:35:58,581 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:58,581 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1, 1] [2018-09-23 19:35:58,582 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:58,582 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:58,582 INFO L82 PathProgramCache]: Analyzing trace with hash 941947112, now seen corresponding path program 61 times [2018-09-23 19:35:58,582 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:58,582 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:58,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:58,583 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:58,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:58,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:00,156 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 19:36:00,156 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:00,156 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:36:00,163 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:36:00,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:00,256 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:00,272 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 19:36:00,293 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:00,293 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-23 19:36:00,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-23 19:36:00,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-23 19:36:00,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-23 19:36:00,294 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 64 states. [2018-09-23 19:36:00,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:00,385 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-09-23 19:36:00,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-23 19:36:00,386 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 64 [2018-09-23 19:36:00,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:00,387 INFO L225 Difference]: With dead ends: 68 [2018-09-23 19:36:00,387 INFO L226 Difference]: Without dead ends: 66 [2018-09-23 19:36:00,387 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-23 19:36:00,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-23 19:36:00,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-09-23 19:36:00,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-23 19:36:00,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-09-23 19:36:00,390 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-09-23 19:36:00,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:00,390 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-09-23 19:36:00,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-23 19:36:00,390 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-09-23 19:36:00,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-23 19:36:00,391 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:00,391 INFO L375 BasicCegarLoop]: trace histogram [62, 1, 1, 1] [2018-09-23 19:36:00,391 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:00,391 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:00,391 INFO L82 PathProgramCache]: Analyzing trace with hash -864412575, now seen corresponding path program 62 times [2018-09-23 19:36:00,391 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:00,391 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:00,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:00,392 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:36:00,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:00,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:02,307 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 19:36:02,308 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:02,308 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:36:02,318 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:36:02,414 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:36:02,414 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:02,418 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:02,429 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 19:36:02,460 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:02,460 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-23 19:36:02,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-23 19:36:02,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-23 19:36:02,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-23 19:36:02,461 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 65 states. [2018-09-23 19:36:02,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:02,611 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-23 19:36:02,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-23 19:36:02,612 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 65 [2018-09-23 19:36:02,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:02,613 INFO L225 Difference]: With dead ends: 69 [2018-09-23 19:36:02,613 INFO L226 Difference]: Without dead ends: 67 [2018-09-23 19:36:02,613 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-23 19:36:02,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-23 19:36:02,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-23 19:36:02,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-23 19:36:02,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-09-23 19:36:02,617 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-09-23 19:36:02,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:02,617 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-09-23 19:36:02,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-23 19:36:02,617 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-09-23 19:36:02,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-23 19:36:02,617 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:02,617 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1, 1] [2018-09-23 19:36:02,618 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:02,618 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:02,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1026988024, now seen corresponding path program 63 times [2018-09-23 19:36:02,618 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:02,618 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:02,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:02,619 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:02,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:02,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:04,175 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 19:36:04,176 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:04,176 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 19:36:04,188 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:36:04,360 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-09-23 19:36:04,360 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:04,365 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:04,380 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 19:36:04,405 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:04,405 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-23 19:36:04,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-23 19:36:04,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-23 19:36:04,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-23 19:36:04,407 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 66 states. [2018-09-23 19:36:04,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:04,524 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-09-23 19:36:04,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-23 19:36:04,534 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 66 [2018-09-23 19:36:04,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:04,534 INFO L225 Difference]: With dead ends: 70 [2018-09-23 19:36:04,534 INFO L226 Difference]: Without dead ends: 68 [2018-09-23 19:36:04,535 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 19:36:04,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-23 19:36:04,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-09-23 19:36:04,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-23 19:36:04,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-09-23 19:36:04,538 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-09-23 19:36:04,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:04,538 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-09-23 19:36:04,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-23 19:36:04,538 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-09-23 19:36:04,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-09-23 19:36:04,539 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:04,539 INFO L375 BasicCegarLoop]: trace histogram [64, 1, 1, 1] [2018-09-23 19:36:04,539 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:04,539 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:04,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1771859647, now seen corresponding path program 64 times [2018-09-23 19:36:04,540 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:04,540 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:04,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:04,542 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:04,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:04,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:06,147 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 19:36:06,148 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:06,148 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:36:06,156 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:36:06,250 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:36:06,250 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:06,255 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:06,273 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 19:36:06,305 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:06,306 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-23 19:36:06,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-23 19:36:06,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-23 19:36:06,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-23 19:36:06,307 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 67 states. [2018-09-23 19:36:06,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:06,501 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-23 19:36:06,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-23 19:36:06,501 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 67 [2018-09-23 19:36:06,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:06,502 INFO L225 Difference]: With dead ends: 71 [2018-09-23 19:36:06,502 INFO L226 Difference]: Without dead ends: 69 [2018-09-23 19:36:06,503 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 19:36:06,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-23 19:36:06,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-23 19:36:06,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-23 19:36:06,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-09-23 19:36:06,506 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-09-23 19:36:06,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:06,506 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-09-23 19:36:06,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-23 19:36:06,506 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-09-23 19:36:06,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-23 19:36:06,507 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:06,507 INFO L375 BasicCegarLoop]: trace histogram [65, 1, 1, 1] [2018-09-23 19:36:06,507 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:06,507 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:06,507 INFO L82 PathProgramCache]: Analyzing trace with hash 906923816, now seen corresponding path program 65 times [2018-09-23 19:36:06,507 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:06,507 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:06,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:06,508 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:06,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:06,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:08,509 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 19:36:08,509 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:08,509 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:36:08,516 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:36:08,637 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-09-23 19:36:08,637 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:08,640 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:08,653 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 19:36:08,674 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:08,674 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-23 19:36:08,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-23 19:36:08,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-23 19:36:08,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-23 19:36:08,675 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 68 states. [2018-09-23 19:36:08,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:08,958 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-09-23 19:36:08,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-23 19:36:08,958 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 68 [2018-09-23 19:36:08,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:08,959 INFO L225 Difference]: With dead ends: 72 [2018-09-23 19:36:08,959 INFO L226 Difference]: Without dead ends: 70 [2018-09-23 19:36:08,960 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 19:36:08,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-23 19:36:08,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-09-23 19:36:08,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-23 19:36:08,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-09-23 19:36:08,961 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-09-23 19:36:08,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:08,962 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-09-23 19:36:08,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-23 19:36:08,962 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-09-23 19:36:08,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-09-23 19:36:08,962 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:08,962 INFO L375 BasicCegarLoop]: trace histogram [66, 1, 1, 1] [2018-09-23 19:36:08,962 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:08,963 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:08,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1950134751, now seen corresponding path program 66 times [2018-09-23 19:36:08,963 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:08,963 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:08,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:08,963 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:08,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:08,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:10,607 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 19:36:10,608 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:10,608 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 19:36:10,616 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:36:10,735 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-09-23 19:36:10,736 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:10,739 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:10,758 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 19:36:10,788 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:10,789 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-09-23 19:36:10,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-23 19:36:10,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-23 19:36:10,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-23 19:36:10,790 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 69 states. [2018-09-23 19:36:10,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:10,935 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-23 19:36:10,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-23 19:36:10,936 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 69 [2018-09-23 19:36:10,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:10,937 INFO L225 Difference]: With dead ends: 73 [2018-09-23 19:36:10,937 INFO L226 Difference]: Without dead ends: 71 [2018-09-23 19:36:10,937 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 19:36:10,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-23 19:36:10,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-23 19:36:10,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-23 19:36:10,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-09-23 19:36:10,940 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-09-23 19:36:10,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:10,940 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-09-23 19:36:10,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-23 19:36:10,940 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-09-23 19:36:10,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-23 19:36:10,941 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:10,941 INFO L375 BasicCegarLoop]: trace histogram [67, 1, 1, 1] [2018-09-23 19:36:10,941 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:10,941 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:10,941 INFO L82 PathProgramCache]: Analyzing trace with hash -324637112, now seen corresponding path program 67 times [2018-09-23 19:36:10,941 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:10,941 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:10,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:10,942 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:10,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:10,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:12,915 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 19:36:12,915 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:12,915 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 19:36:12,923 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:36:13,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:13,025 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:13,044 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 19:36:13,075 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:13,076 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-23 19:36:13,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-23 19:36:13,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-23 19:36:13,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-23 19:36:13,077 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 70 states. [2018-09-23 19:36:13,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:13,361 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-09-23 19:36:13,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-23 19:36:13,362 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 70 [2018-09-23 19:36:13,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:13,362 INFO L225 Difference]: With dead ends: 74 [2018-09-23 19:36:13,363 INFO L226 Difference]: Without dead ends: 72 [2018-09-23 19:36:13,363 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-23 19:36:13,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-09-23 19:36:13,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-09-23 19:36:13,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-09-23 19:36:13,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-09-23 19:36:13,365 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-09-23 19:36:13,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:13,366 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-09-23 19:36:13,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-23 19:36:13,366 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-09-23 19:36:13,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-09-23 19:36:13,366 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:13,367 INFO L375 BasicCegarLoop]: trace histogram [68, 1, 1, 1] [2018-09-23 19:36:13,367 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:13,367 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:13,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1473817855, now seen corresponding path program 68 times [2018-09-23 19:36:13,367 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:13,367 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:13,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:13,368 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:36:13,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:13,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:15,097 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 19:36:15,098 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:15,098 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:36:15,105 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:36:15,210 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:36:15,211 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:15,214 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:15,233 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 19:36:15,263 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:15,263 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-23 19:36:15,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-23 19:36:15,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-23 19:36:15,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-23 19:36:15,265 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 71 states. [2018-09-23 19:36:16,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:16,499 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-09-23 19:36:16,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-23 19:36:16,500 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 71 [2018-09-23 19:36:16,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:16,500 INFO L225 Difference]: With dead ends: 75 [2018-09-23 19:36:16,501 INFO L226 Difference]: Without dead ends: 73 [2018-09-23 19:36:16,501 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-23 19:36:16,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-23 19:36:16,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-23 19:36:16,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-23 19:36:16,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-09-23 19:36:16,503 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2018-09-23 19:36:16,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:16,503 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-09-23 19:36:16,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-23 19:36:16,503 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-09-23 19:36:16,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-23 19:36:16,503 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:16,504 INFO L375 BasicCegarLoop]: trace histogram [69, 1, 1, 1] [2018-09-23 19:36:16,504 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:16,504 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:16,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1556284776, now seen corresponding path program 69 times [2018-09-23 19:36:16,504 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:16,504 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:16,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:16,505 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:16,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:16,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:18,506 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 19:36:18,506 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:18,506 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 19:36:18,513 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:36:18,647 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-09-23 19:36:18,648 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:18,652 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:18,670 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 19:36:18,702 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:18,702 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-23 19:36:18,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-23 19:36:18,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-23 19:36:18,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-23 19:36:18,703 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 72 states. [2018-09-23 19:36:19,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:19,072 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-09-23 19:36:19,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-23 19:36:19,072 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 72 [2018-09-23 19:36:19,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:19,074 INFO L225 Difference]: With dead ends: 76 [2018-09-23 19:36:19,075 INFO L226 Difference]: Without dead ends: 74 [2018-09-23 19:36:19,075 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-23 19:36:19,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-23 19:36:19,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-09-23 19:36:19,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-23 19:36:19,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-09-23 19:36:19,078 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2018-09-23 19:36:19,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:19,078 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-09-23 19:36:19,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-23 19:36:19,079 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-09-23 19:36:19,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-09-23 19:36:19,079 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:19,079 INFO L375 BasicCegarLoop]: trace histogram [70, 1, 1, 1] [2018-09-23 19:36:19,079 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:19,080 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:19,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1000185825, now seen corresponding path program 70 times [2018-09-23 19:36:19,080 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:19,080 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:19,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:19,080 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:19,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:19,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:20,918 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 19:36:20,918 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:20,918 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:36:20,925 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:36:21,034 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:36:21,034 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:21,037 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:21,052 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 19:36:21,077 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:21,078 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-09-23 19:36:21,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-23 19:36:21,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-23 19:36:21,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-23 19:36:21,079 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 73 states. [2018-09-23 19:36:21,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:21,300 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-23 19:36:21,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-23 19:36:21,301 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 73 [2018-09-23 19:36:21,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:21,301 INFO L225 Difference]: With dead ends: 77 [2018-09-23 19:36:21,302 INFO L226 Difference]: Without dead ends: 75 [2018-09-23 19:36:21,302 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-23 19:36:21,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-23 19:36:21,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-23 19:36:21,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-23 19:36:21,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-09-23 19:36:21,306 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2018-09-23 19:36:21,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:21,306 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-09-23 19:36:21,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-23 19:36:21,306 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-09-23 19:36:21,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-23 19:36:21,307 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:21,307 INFO L375 BasicCegarLoop]: trace histogram [71, 1, 1, 1] [2018-09-23 19:36:21,307 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:21,307 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:21,307 INFO L82 PathProgramCache]: Analyzing trace with hash 940987528, now seen corresponding path program 71 times [2018-09-23 19:36:21,307 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:21,308 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:21,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:21,308 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:21,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:21,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:23,594 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 19:36:23,594 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:23,595 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 19:36:23,602 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:36:23,736 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-09-23 19:36:23,736 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:23,740 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:23,757 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 19:36:23,787 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:23,787 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-23 19:36:23,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-23 19:36:23,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-23 19:36:23,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-23 19:36:23,789 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 74 states. [2018-09-23 19:36:23,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:23,927 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-09-23 19:36:23,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-23 19:36:23,927 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 74 [2018-09-23 19:36:23,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:23,928 INFO L225 Difference]: With dead ends: 78 [2018-09-23 19:36:23,929 INFO L226 Difference]: Without dead ends: 76 [2018-09-23 19:36:23,929 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-23 19:36:23,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-09-23 19:36:23,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-09-23 19:36:23,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-23 19:36:23,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-09-23 19:36:23,933 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2018-09-23 19:36:23,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:23,933 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-09-23 19:36:23,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-23 19:36:23,933 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-09-23 19:36:23,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-09-23 19:36:23,934 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:23,934 INFO L375 BasicCegarLoop]: trace histogram [72, 1, 1, 1] [2018-09-23 19:36:23,934 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:23,934 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:23,934 INFO L82 PathProgramCache]: Analyzing trace with hash -894159679, now seen corresponding path program 72 times [2018-09-23 19:36:23,934 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:23,935 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:23,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:23,935 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:23,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:23,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:25,912 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 19:36:25,912 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:25,912 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:36:25,920 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:36:26,081 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-23 19:36:26,081 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:26,085 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:26,103 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 19:36:26,132 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:26,133 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-09-23 19:36:26,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-23 19:36:26,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-23 19:36:26,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-23 19:36:26,134 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 75 states. [2018-09-23 19:36:26,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:26,242 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-09-23 19:36:26,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-23 19:36:26,242 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 75 [2018-09-23 19:36:26,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:26,243 INFO L225 Difference]: With dead ends: 79 [2018-09-23 19:36:26,243 INFO L226 Difference]: Without dead ends: 77 [2018-09-23 19:36:26,244 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-23 19:36:26,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-23 19:36:26,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-23 19:36:26,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-23 19:36:26,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-09-23 19:36:26,247 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2018-09-23 19:36:26,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:26,247 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-09-23 19:36:26,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-23 19:36:26,247 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-09-23 19:36:26,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-23 19:36:26,248 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:26,248 INFO L375 BasicCegarLoop]: trace histogram [73, 1, 1, 1] [2018-09-23 19:36:26,248 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:26,248 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:26,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1949148248, now seen corresponding path program 73 times [2018-09-23 19:36:26,248 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:26,249 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:26,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:26,249 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:26,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:26,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:28,417 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 19:36:28,417 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:28,417 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:36:28,439 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:36:28,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:28,550 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:28,567 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 19:36:28,591 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:28,591 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-23 19:36:28,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-23 19:36:28,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-23 19:36:28,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-23 19:36:28,592 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 76 states. [2018-09-23 19:36:28,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:28,771 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-09-23 19:36:28,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-23 19:36:28,772 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 76 [2018-09-23 19:36:28,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:28,773 INFO L225 Difference]: With dead ends: 80 [2018-09-23 19:36:28,773 INFO L226 Difference]: Without dead ends: 78 [2018-09-23 19:36:28,773 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-23 19:36:28,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-09-23 19:36:28,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-09-23 19:36:28,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-09-23 19:36:28,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-09-23 19:36:28,775 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2018-09-23 19:36:28,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:28,776 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-09-23 19:36:28,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-23 19:36:28,776 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-09-23 19:36:28,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-09-23 19:36:28,776 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:28,777 INFO L375 BasicCegarLoop]: trace histogram [74, 1, 1, 1] [2018-09-23 19:36:28,777 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:28,777 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:28,777 INFO L82 PathProgramCache]: Analyzing trace with hash -294055519, now seen corresponding path program 74 times [2018-09-23 19:36:28,777 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:28,777 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:28,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:28,778 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:36:28,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:28,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:31,179 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 19:36:31,179 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:31,179 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:36:31,186 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:36:31,299 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:36:31,299 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:31,303 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:31,322 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 19:36:31,351 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:31,351 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-09-23 19:36:31,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-23 19:36:31,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-23 19:36:31,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-23 19:36:31,353 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 77 states. [2018-09-23 19:36:31,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:31,525 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-09-23 19:36:31,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-23 19:36:31,525 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 77 [2018-09-23 19:36:31,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:31,526 INFO L225 Difference]: With dead ends: 81 [2018-09-23 19:36:31,526 INFO L226 Difference]: Without dead ends: 79 [2018-09-23 19:36:31,526 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-23 19:36:31,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-23 19:36:31,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-23 19:36:31,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-23 19:36:31,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-09-23 19:36:31,530 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2018-09-23 19:36:31,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:31,530 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-09-23 19:36:31,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-23 19:36:31,530 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-09-23 19:36:31,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-23 19:36:31,531 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:31,531 INFO L375 BasicCegarLoop]: trace histogram [75, 1, 1, 1] [2018-09-23 19:36:31,531 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:31,531 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:31,532 INFO L82 PathProgramCache]: Analyzing trace with hash -525788472, now seen corresponding path program 75 times [2018-09-23 19:36:31,532 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:31,532 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:31,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:31,533 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:31,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:31,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:33,998 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 19:36:33,999 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:33,999 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:36:34,007 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:36:34,156 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-09-23 19:36:34,156 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:34,160 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:34,173 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 19:36:34,194 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:34,194 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-09-23 19:36:34,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-23 19:36:34,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-23 19:36:34,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-23 19:36:34,196 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 78 states. [2018-09-23 19:36:34,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:34,337 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-09-23 19:36:34,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-23 19:36:34,337 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 78 [2018-09-23 19:36:34,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:34,338 INFO L225 Difference]: With dead ends: 82 [2018-09-23 19:36:34,338 INFO L226 Difference]: Without dead ends: 80 [2018-09-23 19:36:34,339 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-23 19:36:34,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-23 19:36:34,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-09-23 19:36:34,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-23 19:36:34,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-09-23 19:36:34,342 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2018-09-23 19:36:34,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:34,342 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-09-23 19:36:34,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-23 19:36:34,342 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-09-23 19:36:34,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-09-23 19:36:34,342 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:34,342 INFO L375 BasicCegarLoop]: trace histogram [76, 1, 1, 1] [2018-09-23 19:36:34,343 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:34,343 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:34,343 INFO L82 PathProgramCache]: Analyzing trace with hash 880424577, now seen corresponding path program 76 times [2018-09-23 19:36:34,343 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:34,343 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:34,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:34,344 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:34,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:34,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:36,478 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 19:36:36,478 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:36,478 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 19:36:36,485 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:36:36,598 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:36:36,598 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:36,602 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:36,616 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 19:36:36,638 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:36,638 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-09-23 19:36:36,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-23 19:36:36,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-23 19:36:36,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-23 19:36:36,639 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 79 states. [2018-09-23 19:36:37,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:37,345 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-09-23 19:36:37,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-23 19:36:37,346 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 79 [2018-09-23 19:36:37,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:37,347 INFO L225 Difference]: With dead ends: 83 [2018-09-23 19:36:37,347 INFO L226 Difference]: Without dead ends: 81 [2018-09-23 19:36:37,347 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 19:36:37,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-23 19:36:37,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-23 19:36:37,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-23 19:36:37,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-09-23 19:36:37,350 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2018-09-23 19:36:37,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:37,350 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-09-23 19:36:37,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-23 19:36:37,350 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-09-23 19:36:37,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-23 19:36:37,351 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:37,351 INFO L375 BasicCegarLoop]: trace histogram [77, 1, 1, 1] [2018-09-23 19:36:37,351 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:37,351 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:37,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1523356136, now seen corresponding path program 77 times [2018-09-23 19:36:37,352 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:37,352 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:37,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:37,353 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:37,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:37,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:39,783 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 19:36:39,783 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:39,784 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:36:39,791 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:36:39,941 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-09-23 19:36:39,941 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:39,946 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:39,965 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 19:36:39,989 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:39,989 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-09-23 19:36:39,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-23 19:36:39,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-23 19:36:39,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-23 19:36:39,990 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 80 states. [2018-09-23 19:36:40,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:40,173 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2018-09-23 19:36:40,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-23 19:36:40,174 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 80 [2018-09-23 19:36:40,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:40,175 INFO L225 Difference]: With dead ends: 84 [2018-09-23 19:36:40,175 INFO L226 Difference]: Without dead ends: 82 [2018-09-23 19:36:40,175 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-23 19:36:40,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-23 19:36:40,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-09-23 19:36:40,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-09-23 19:36:40,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-09-23 19:36:40,179 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2018-09-23 19:36:40,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:40,179 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-09-23 19:36:40,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-23 19:36:40,179 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-09-23 19:36:40,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-09-23 19:36:40,180 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:40,180 INFO L375 BasicCegarLoop]: trace histogram [78, 1, 1, 1] [2018-09-23 19:36:40,180 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:40,180 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:40,181 INFO L82 PathProgramCache]: Analyzing trace with hash -20602015, now seen corresponding path program 78 times [2018-09-23 19:36:40,181 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:40,181 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:40,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:40,181 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:40,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:40,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:43,138 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 19:36:43,139 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:43,139 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:36:43,146 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:36:43,298 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2018-09-23 19:36:43,299 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:43,302 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:43,318 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 19:36:43,339 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:43,339 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-09-23 19:36:43,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-23 19:36:43,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-23 19:36:43,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-23 19:36:43,341 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 81 states. [2018-09-23 19:36:43,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:43,483 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-09-23 19:36:43,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-23 19:36:43,484 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 81 [2018-09-23 19:36:43,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:43,485 INFO L225 Difference]: With dead ends: 85 [2018-09-23 19:36:43,485 INFO L226 Difference]: Without dead ends: 83 [2018-09-23 19:36:43,486 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-23 19:36:43,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-23 19:36:43,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-23 19:36:43,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-23 19:36:43,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-09-23 19:36:43,489 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2018-09-23 19:36:43,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:43,489 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-09-23 19:36:43,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-23 19:36:43,489 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-09-23 19:36:43,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-23 19:36:43,490 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:43,490 INFO L375 BasicCegarLoop]: trace histogram [79, 1, 1, 1] [2018-09-23 19:36:43,490 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:43,490 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:43,490 INFO L82 PathProgramCache]: Analyzing trace with hash -638664440, now seen corresponding path program 79 times [2018-09-23 19:36:43,490 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:43,491 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:43,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:43,491 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:43,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:43,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:45,903 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 19:36:45,903 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:45,904 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:36:45,911 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:36:46,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:46,034 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:46,048 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 19:36:46,069 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:46,069 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-09-23 19:36:46,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-23 19:36:46,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-23 19:36:46,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-23 19:36:46,070 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 82 states. [2018-09-23 19:36:46,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:46,232 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-09-23 19:36:46,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-23 19:36:46,233 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 82 [2018-09-23 19:36:46,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:46,234 INFO L225 Difference]: With dead ends: 86 [2018-09-23 19:36:46,234 INFO L226 Difference]: Without dead ends: 84 [2018-09-23 19:36:46,234 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-23 19:36:46,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-09-23 19:36:46,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-09-23 19:36:46,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-09-23 19:36:46,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-09-23 19:36:46,236 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2018-09-23 19:36:46,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:46,236 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-09-23 19:36:46,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-23 19:36:46,236 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-09-23 19:36:46,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-23 19:36:46,237 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:46,237 INFO L375 BasicCegarLoop]: trace histogram [80, 1, 1, 1] [2018-09-23 19:36:46,237 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:46,237 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:46,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1676236865, now seen corresponding path program 80 times [2018-09-23 19:36:46,237 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:46,238 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:46,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:46,238 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:36:46,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:46,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:49,126 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 19:36:49,127 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:49,127 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 19:36:49,134 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:36:49,252 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:36:49,252 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:49,256 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:49,272 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 19:36:49,293 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:49,293 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-09-23 19:36:49,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-23 19:36:49,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-23 19:36:49,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-23 19:36:49,295 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 83 states. [2018-09-23 19:36:49,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:49,487 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-09-23 19:36:49,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-23 19:36:49,487 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 83 [2018-09-23 19:36:49,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:49,488 INFO L225 Difference]: With dead ends: 87 [2018-09-23 19:36:49,488 INFO L226 Difference]: Without dead ends: 85 [2018-09-23 19:36:49,489 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-23 19:36:49,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-23 19:36:49,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-23 19:36:49,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-23 19:36:49,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-09-23 19:36:49,492 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2018-09-23 19:36:49,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:49,492 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-09-23 19:36:49,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-23 19:36:49,492 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-09-23 19:36:49,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-23 19:36:49,493 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:49,493 INFO L375 BasicCegarLoop]: trace histogram [81, 1, 1, 1] [2018-09-23 19:36:49,493 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:49,493 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:49,493 INFO L82 PathProgramCache]: Analyzing trace with hash 423733288, now seen corresponding path program 81 times [2018-09-23 19:36:49,493 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:49,493 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:49,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:49,494 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:49,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:49,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:51,901 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 19:36:51,902 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:51,902 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:36:51,910 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:36:52,070 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-09-23 19:36:52,070 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:52,074 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:52,093 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 19:36:52,117 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:52,118 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-09-23 19:36:52,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-23 19:36:52,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-23 19:36:52,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-23 19:36:52,119 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 84 states. [2018-09-23 19:36:52,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:52,310 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-09-23 19:36:52,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-23 19:36:52,311 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 84 [2018-09-23 19:36:52,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:52,312 INFO L225 Difference]: With dead ends: 88 [2018-09-23 19:36:52,312 INFO L226 Difference]: Without dead ends: 86 [2018-09-23 19:36:52,312 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 19:36:52,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-09-23 19:36:52,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-09-23 19:36:52,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-09-23 19:36:52,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-09-23 19:36:52,315 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2018-09-23 19:36:52,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:52,315 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-09-23 19:36:52,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-23 19:36:52,315 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-09-23 19:36:52,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-09-23 19:36:52,316 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:52,316 INFO L375 BasicCegarLoop]: trace histogram [82, 1, 1, 1] [2018-09-23 19:36:52,316 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:52,316 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:52,316 INFO L82 PathProgramCache]: Analyzing trace with hash 250828065, now seen corresponding path program 82 times [2018-09-23 19:36:52,316 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:52,316 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:52,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:52,317 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:52,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:52,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:55,236 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 19:36:55,236 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:55,236 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:36:55,245 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:36:55,366 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:36:55,366 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:55,370 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:55,392 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 19:36:55,423 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:55,423 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-09-23 19:36:55,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-09-23 19:36:55,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-09-23 19:36:55,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-23 19:36:55,425 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 85 states. [2018-09-23 19:36:55,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:55,751 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-09-23 19:36:55,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-23 19:36:55,751 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 85 [2018-09-23 19:36:55,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:55,752 INFO L225 Difference]: With dead ends: 89 [2018-09-23 19:36:55,752 INFO L226 Difference]: Without dead ends: 87 [2018-09-23 19:36:55,753 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-23 19:36:55,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-23 19:36:55,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-09-23 19:36:55,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-23 19:36:55,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-09-23 19:36:55,756 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2018-09-23 19:36:55,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:55,756 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-09-23 19:36:55,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-09-23 19:36:55,756 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-09-23 19:36:55,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-23 19:36:55,757 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:55,757 INFO L375 BasicCegarLoop]: trace histogram [83, 1, 1, 1] [2018-09-23 19:36:55,757 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:55,758 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:55,758 INFO L82 PathProgramCache]: Analyzing trace with hash -814266552, now seen corresponding path program 83 times [2018-09-23 19:36:55,758 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:55,758 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:55,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:55,759 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:55,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:55,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:58,546 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 19:36:58,546 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:58,546 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:36:58,554 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:36:58,717 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-09-23 19:36:58,717 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:58,722 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:58,754 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 19:36:58,776 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:58,776 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-09-23 19:36:58,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-23 19:36:58,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-23 19:36:58,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-23 19:36:58,777 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 86 states. [2018-09-23 19:36:59,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:59,098 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2018-09-23 19:36:59,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-23 19:36:59,098 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 86 [2018-09-23 19:36:59,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:59,099 INFO L225 Difference]: With dead ends: 90 [2018-09-23 19:36:59,099 INFO L226 Difference]: Without dead ends: 88 [2018-09-23 19:36:59,099 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-23 19:36:59,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-09-23 19:36:59,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-09-23 19:36:59,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-09-23 19:36:59,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-09-23 19:36:59,102 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2018-09-23 19:36:59,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:59,102 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-09-23 19:36:59,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-23 19:36:59,102 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-09-23 19:36:59,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-09-23 19:36:59,103 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:59,103 INFO L375 BasicCegarLoop]: trace histogram [84, 1, 1, 1] [2018-09-23 19:36:59,104 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:59,104 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:59,104 INFO L82 PathProgramCache]: Analyzing trace with hash 527538689, now seen corresponding path program 84 times [2018-09-23 19:36:59,104 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:59,104 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:59,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:59,105 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:59,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:59,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:01,719 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 19:37:01,719 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:01,719 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:37:01,727 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:37:01,888 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-23 19:37:01,889 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:01,893 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:01,908 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 19:37:01,929 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:01,930 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-09-23 19:37:01,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-09-23 19:37:01,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-09-23 19:37:01,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-23 19:37:01,931 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 87 states. [2018-09-23 19:37:02,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:02,129 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-09-23 19:37:02,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-23 19:37:02,129 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 87 [2018-09-23 19:37:02,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:02,130 INFO L225 Difference]: With dead ends: 91 [2018-09-23 19:37:02,130 INFO L226 Difference]: Without dead ends: 89 [2018-09-23 19:37:02,130 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-23 19:37:02,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-23 19:37:02,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-09-23 19:37:02,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-23 19:37:02,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-09-23 19:37:02,133 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2018-09-23 19:37:02,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:02,133 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-09-23 19:37:02,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-09-23 19:37:02,133 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-09-23 19:37:02,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-23 19:37:02,134 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:02,134 INFO L375 BasicCegarLoop]: trace histogram [85, 1, 1, 1] [2018-09-23 19:37:02,134 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:02,134 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:02,135 INFO L82 PathProgramCache]: Analyzing trace with hash -826171800, now seen corresponding path program 85 times [2018-09-23 19:37:02,135 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:02,135 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:02,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:02,135 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:02,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:02,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:05,148 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 19:37:05,149 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:05,149 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 19:37:05,156 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:37:05,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:05,285 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:05,300 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 19:37:05,321 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:05,322 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-09-23 19:37:05,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-23 19:37:05,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-23 19:37:05,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-23 19:37:05,323 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 88 states. [2018-09-23 19:37:05,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:05,490 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2018-09-23 19:37:05,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-23 19:37:05,490 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 88 [2018-09-23 19:37:05,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:05,491 INFO L225 Difference]: With dead ends: 92 [2018-09-23 19:37:05,491 INFO L226 Difference]: Without dead ends: 90 [2018-09-23 19:37:05,492 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-23 19:37:05,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-09-23 19:37:05,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-09-23 19:37:05,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-09-23 19:37:05,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-09-23 19:37:05,495 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2018-09-23 19:37:05,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:05,495 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-09-23 19:37:05,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-23 19:37:05,496 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-09-23 19:37:05,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-09-23 19:37:05,496 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:05,496 INFO L375 BasicCegarLoop]: trace histogram [86, 1, 1, 1] [2018-09-23 19:37:05,496 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:05,496 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:05,497 INFO L82 PathProgramCache]: Analyzing trace with hash 158476001, now seen corresponding path program 86 times [2018-09-23 19:37:05,497 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:05,497 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:05,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:05,497 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:37:05,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:05,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:08,613 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 19:37:08,613 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:08,613 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:37:08,620 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:37:08,750 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:37:08,750 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:08,754 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:08,770 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 19:37:08,791 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:08,791 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-09-23 19:37:08,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-23 19:37:08,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-23 19:37:08,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-23 19:37:08,793 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 89 states. [2018-09-23 19:37:09,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:09,003 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-09-23 19:37:09,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-23 19:37:09,004 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 89 [2018-09-23 19:37:09,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:09,005 INFO L225 Difference]: With dead ends: 93 [2018-09-23 19:37:09,005 INFO L226 Difference]: Without dead ends: 91 [2018-09-23 19:37:09,005 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-23 19:37:09,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-23 19:37:09,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-23 19:37:09,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-23 19:37:09,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-09-23 19:37:09,008 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2018-09-23 19:37:09,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:09,008 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-09-23 19:37:09,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-23 19:37:09,008 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-09-23 19:37:09,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-23 19:37:09,009 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:09,009 INFO L375 BasicCegarLoop]: trace histogram [87, 1, 1, 1] [2018-09-23 19:37:09,009 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:09,009 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:09,009 INFO L82 PathProgramCache]: Analyzing trace with hash 617786760, now seen corresponding path program 87 times [2018-09-23 19:37:09,009 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:09,010 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:09,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:09,010 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:09,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:09,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:12,052 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 19:37:12,053 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:12,053 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 19:37:12,061 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:37:12,234 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-09-23 19:37:12,234 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:12,239 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:12,254 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 19:37:12,275 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:12,276 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-09-23 19:37:12,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-23 19:37:12,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-23 19:37:12,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-23 19:37:12,277 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 90 states. [2018-09-23 19:37:12,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:12,474 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-09-23 19:37:12,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-23 19:37:12,475 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 90 [2018-09-23 19:37:12,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:12,476 INFO L225 Difference]: With dead ends: 94 [2018-09-23 19:37:12,476 INFO L226 Difference]: Without dead ends: 92 [2018-09-23 19:37:12,477 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-23 19:37:12,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-09-23 19:37:12,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-09-23 19:37:12,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-09-23 19:37:12,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-09-23 19:37:12,480 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2018-09-23 19:37:12,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:12,480 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-09-23 19:37:12,480 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-23 19:37:12,480 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-09-23 19:37:12,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-09-23 19:37:12,480 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:12,480 INFO L375 BasicCegarLoop]: trace histogram [88, 1, 1, 1] [2018-09-23 19:37:12,481 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:12,481 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:12,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1971518401, now seen corresponding path program 88 times [2018-09-23 19:37:12,481 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:12,481 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:12,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:12,482 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:12,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:12,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:15,628 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 19:37:15,628 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:15,628 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 19:37:15,636 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:37:15,767 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:37:15,767 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:15,771 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:15,802 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 19:37:15,822 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:15,823 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-09-23 19:37:15,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-09-23 19:37:15,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-09-23 19:37:15,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-23 19:37:15,824 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 91 states. [2018-09-23 19:37:15,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:15,971 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-09-23 19:37:15,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-23 19:37:15,971 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 91 [2018-09-23 19:37:15,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:15,972 INFO L225 Difference]: With dead ends: 95 [2018-09-23 19:37:15,972 INFO L226 Difference]: Without dead ends: 93 [2018-09-23 19:37:15,973 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-23 19:37:15,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-23 19:37:15,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-23 19:37:15,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-23 19:37:15,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-09-23 19:37:15,976 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2018-09-23 19:37:15,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:15,976 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-09-23 19:37:15,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-09-23 19:37:15,976 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-09-23 19:37:15,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-23 19:37:15,976 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:15,976 INFO L375 BasicCegarLoop]: trace histogram [89, 1, 1, 1] [2018-09-23 19:37:15,977 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:15,977 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:15,977 INFO L82 PathProgramCache]: Analyzing trace with hash 987526312, now seen corresponding path program 89 times [2018-09-23 19:37:15,977 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:15,977 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:15,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:15,978 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:15,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:15,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:19,183 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 19:37:19,184 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:19,184 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:37:19,193 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:37:19,376 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-09-23 19:37:19,377 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:19,381 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:19,397 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 19:37:19,417 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:19,418 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-09-23 19:37:19,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-23 19:37:19,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-23 19:37:19,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-23 19:37:19,419 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 92 states. [2018-09-23 19:37:19,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:19,660 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2018-09-23 19:37:19,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-23 19:37:19,661 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 92 [2018-09-23 19:37:19,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:19,662 INFO L225 Difference]: With dead ends: 96 [2018-09-23 19:37:19,662 INFO L226 Difference]: Without dead ends: 94 [2018-09-23 19:37:19,663 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-23 19:37:19,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-09-23 19:37:19,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-09-23 19:37:19,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-09-23 19:37:19,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-09-23 19:37:19,665 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2018-09-23 19:37:19,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:19,666 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-09-23 19:37:19,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-23 19:37:19,666 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-09-23 19:37:19,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-09-23 19:37:19,666 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:19,666 INFO L375 BasicCegarLoop]: trace histogram [90, 1, 1, 1] [2018-09-23 19:37:19,666 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:19,666 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:19,667 INFO L82 PathProgramCache]: Analyzing trace with hash 548542625, now seen corresponding path program 90 times [2018-09-23 19:37:19,667 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:19,667 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:19,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:19,667 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:19,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:19,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:22,632 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 19:37:22,632 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:22,632 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 19:37:22,640 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:37:22,819 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2018-09-23 19:37:22,819 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:22,824 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:22,840 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 19:37:22,860 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:22,860 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-09-23 19:37:22,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-09-23 19:37:22,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-09-23 19:37:22,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-23 19:37:22,862 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 93 states. [2018-09-23 19:37:23,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:23,094 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-09-23 19:37:23,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-23 19:37:23,095 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 93 [2018-09-23 19:37:23,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:23,096 INFO L225 Difference]: With dead ends: 97 [2018-09-23 19:37:23,096 INFO L226 Difference]: Without dead ends: 95 [2018-09-23 19:37:23,096 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 19:37:23,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-23 19:37:23,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-23 19:37:23,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-23 19:37:23,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-09-23 19:37:23,100 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2018-09-23 19:37:23,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:23,100 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-09-23 19:37:23,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-09-23 19:37:23,100 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-09-23 19:37:23,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-23 19:37:23,101 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:23,101 INFO L375 BasicCegarLoop]: trace histogram [91, 1, 1, 1] [2018-09-23 19:37:23,101 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:23,101 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:23,101 INFO L82 PathProgramCache]: Analyzing trace with hash -175049784, now seen corresponding path program 91 times [2018-09-23 19:37:23,101 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:23,102 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:23,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:23,102 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:23,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:23,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:26,469 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 19:37:26,469 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:26,469 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 19:37:26,477 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:37:26,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:26,614 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:26,632 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 19:37:26,653 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:26,653 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-09-23 19:37:26,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-23 19:37:26,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-23 19:37:26,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-23 19:37:26,655 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 94 states. [2018-09-23 19:37:26,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:26,880 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-09-23 19:37:26,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-23 19:37:26,881 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 94 [2018-09-23 19:37:26,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:26,882 INFO L225 Difference]: With dead ends: 98 [2018-09-23 19:37:26,882 INFO L226 Difference]: Without dead ends: 96 [2018-09-23 19:37:26,882 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-23 19:37:26,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-09-23 19:37:26,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-09-23 19:37:26,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-09-23 19:37:26,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-09-23 19:37:26,884 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2018-09-23 19:37:26,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:26,885 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-09-23 19:37:26,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-23 19:37:26,885 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-09-23 19:37:26,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-09-23 19:37:26,885 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:26,885 INFO L375 BasicCegarLoop]: trace histogram [92, 1, 1, 1] [2018-09-23 19:37:26,885 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:26,885 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:26,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1131577983, now seen corresponding path program 92 times [2018-09-23 19:37:26,886 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:26,886 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:26,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:26,886 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:37:26,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:26,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:30,202 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 19:37:30,202 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:30,202 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 19:37:30,210 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:37:30,346 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:37:30,346 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:30,351 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:30,367 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 19:37:30,387 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:30,388 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-09-23 19:37:30,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-09-23 19:37:30,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-09-23 19:37:30,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-23 19:37:30,389 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 95 states. [2018-09-23 19:37:30,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:30,589 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-09-23 19:37:30,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-23 19:37:30,590 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 95 [2018-09-23 19:37:30,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:30,591 INFO L225 Difference]: With dead ends: 99 [2018-09-23 19:37:30,591 INFO L226 Difference]: Without dead ends: 97 [2018-09-23 19:37:30,591 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-23 19:37:30,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-23 19:37:30,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-23 19:37:30,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-23 19:37:30,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-09-23 19:37:30,593 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2018-09-23 19:37:30,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:30,593 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-09-23 19:37:30,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-09-23 19:37:30,594 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-09-23 19:37:30,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-23 19:37:30,594 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:30,594 INFO L375 BasicCegarLoop]: trace histogram [93, 1, 1, 1] [2018-09-23 19:37:30,595 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:30,595 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:30,595 INFO L82 PathProgramCache]: Analyzing trace with hash -719181080, now seen corresponding path program 93 times [2018-09-23 19:37:30,595 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:30,595 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:30,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:30,596 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:30,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:30,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:34,713 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 19:37:34,713 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:34,713 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 19:37:34,720 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:37:34,926 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-09-23 19:37:34,926 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:34,931 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:34,947 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 19:37:34,969 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:34,970 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-09-23 19:37:34,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-23 19:37:34,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-23 19:37:34,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-23 19:37:34,972 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 96 states. [2018-09-23 19:37:35,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:35,160 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2018-09-23 19:37:35,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-23 19:37:35,160 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 96 [2018-09-23 19:37:35,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:35,161 INFO L225 Difference]: With dead ends: 100 [2018-09-23 19:37:35,161 INFO L226 Difference]: Without dead ends: 98 [2018-09-23 19:37:35,162 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-23 19:37:35,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-09-23 19:37:35,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-09-23 19:37:35,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-09-23 19:37:35,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-09-23 19:37:35,165 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2018-09-23 19:37:35,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:35,165 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-09-23 19:37:35,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-23 19:37:35,165 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-09-23 19:37:35,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-09-23 19:37:35,166 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:35,166 INFO L375 BasicCegarLoop]: trace histogram [94, 1, 1, 1] [2018-09-23 19:37:35,166 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:35,166 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:35,167 INFO L82 PathProgramCache]: Analyzing trace with hash -819778975, now seen corresponding path program 94 times [2018-09-23 19:37:35,167 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:35,167 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:35,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:35,167 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:35,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:35,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:38,485 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 19:37:38,486 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:38,486 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:37:38,497 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:37:38,638 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:37:38,638 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:38,642 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:38,660 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 19:37:38,681 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:38,682 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-09-23 19:37:38,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-09-23 19:37:38,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-09-23 19:37:38,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-23 19:37:38,683 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 97 states. [2018-09-23 19:37:38,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:38,923 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-09-23 19:37:38,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-23 19:37:38,923 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 97 [2018-09-23 19:37:38,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:38,924 INFO L225 Difference]: With dead ends: 101 [2018-09-23 19:37:38,924 INFO L226 Difference]: Without dead ends: 99 [2018-09-23 19:37:38,924 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-23 19:37:38,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-23 19:37:38,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-23 19:37:38,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-23 19:37:38,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-09-23 19:37:38,928 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2018-09-23 19:37:38,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:38,928 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-09-23 19:37:38,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-09-23 19:37:38,928 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-09-23 19:37:38,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-23 19:37:38,929 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:38,929 INFO L375 BasicCegarLoop]: trace histogram [95, 1, 1, 1] [2018-09-23 19:37:38,929 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:38,929 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:38,929 INFO L82 PathProgramCache]: Analyzing trace with hash 356653576, now seen corresponding path program 95 times [2018-09-23 19:37:38,929 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:38,929 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:38,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:38,930 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:38,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:38,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:42,398 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 19:37:42,398 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:42,399 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 19:37:42,408 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:37:42,601 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-09-23 19:37:42,601 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:42,606 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:42,629 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 19:37:42,658 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:42,659 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-09-23 19:37:42,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-23 19:37:42,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-23 19:37:42,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-09-23 19:37:42,660 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 98 states. [2018-09-23 19:37:43,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:43,336 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2018-09-23 19:37:43,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-09-23 19:37:43,336 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 98 [2018-09-23 19:37:43,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:43,337 INFO L225 Difference]: With dead ends: 102 [2018-09-23 19:37:43,337 INFO L226 Difference]: Without dead ends: 100 [2018-09-23 19:37:43,337 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 19:37:43,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-09-23 19:37:43,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-09-23 19:37:43,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-09-23 19:37:43,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-09-23 19:37:43,340 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2018-09-23 19:37:43,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:43,340 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-09-23 19:37:43,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-23 19:37:43,340 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-09-23 19:37:43,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-09-23 19:37:43,340 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:43,341 INFO L375 BasicCegarLoop]: trace histogram [96, 1, 1, 1] [2018-09-23 19:37:43,341 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:43,341 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:43,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1828643007, now seen corresponding path program 96 times [2018-09-23 19:37:43,341 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:43,341 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:43,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:43,342 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:43,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:43,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:47,080 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 19:37:47,081 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:47,081 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:37:47,089 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:37:47,297 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-23 19:37:47,297 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:47,302 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:47,319 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 19:37:47,341 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:47,341 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-09-23 19:37:47,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-09-23 19:37:47,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-09-23 19:37:47,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-09-23 19:37:47,343 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 99 states. [2018-09-23 19:37:47,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:47,612 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-09-23 19:37:47,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-09-23 19:37:47,612 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 99 [2018-09-23 19:37:47,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:47,613 INFO L225 Difference]: With dead ends: 103 [2018-09-23 19:37:47,613 INFO L226 Difference]: Without dead ends: 101 [2018-09-23 19:37:47,614 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-09-23 19:37:47,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-23 19:37:47,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-23 19:37:47,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-23 19:37:47,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-09-23 19:37:47,617 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2018-09-23 19:37:47,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:47,617 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-09-23 19:37:47,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-09-23 19:37:47,618 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-09-23 19:37:47,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-23 19:37:47,618 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:47,618 INFO L375 BasicCegarLoop]: trace histogram [97, 1, 1, 1] [2018-09-23 19:37:47,618 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:47,618 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:47,618 INFO L82 PathProgramCache]: Analyzing trace with hash -853360344, now seen corresponding path program 97 times [2018-09-23 19:37:47,619 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:47,619 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:47,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:47,619 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:47,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:47,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:51,397 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 19:37:51,398 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:51,398 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 19:37:51,405 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:37:51,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:51,555 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:51,574 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 19:37:51,596 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:51,596 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-09-23 19:37:51,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-23 19:37:51,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-23 19:37:51,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-09-23 19:37:51,598 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 100 states. [2018-09-23 19:37:51,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:51,870 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2018-09-23 19:37:51,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-09-23 19:37:51,871 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 100 [2018-09-23 19:37:51,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:51,872 INFO L225 Difference]: With dead ends: 104 [2018-09-23 19:37:51,872 INFO L226 Difference]: Without dead ends: 102 [2018-09-23 19:37:51,873 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-09-23 19:37:51,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-09-23 19:37:51,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-09-23 19:37:51,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-09-23 19:37:51,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-09-23 19:37:51,875 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2018-09-23 19:37:51,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:51,875 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-09-23 19:37:51,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-23 19:37:51,876 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-09-23 19:37:51,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-09-23 19:37:51,876 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:51,876 INFO L375 BasicCegarLoop]: trace histogram [98, 1, 1, 1] [2018-09-23 19:37:51,876 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:51,876 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:51,877 INFO L82 PathProgramCache]: Analyzing trace with hash -684368863, now seen corresponding path program 98 times [2018-09-23 19:37:51,877 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:51,877 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:51,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:51,877 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:37:51,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:51,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:55,747 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 19:37:55,747 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:55,747 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 19:37:55,754 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:37:55,897 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:37:55,897 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:55,902 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:55,920 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 19:37:55,942 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:55,942 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-09-23 19:37:55,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-23 19:37:55,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-23 19:37:55,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-09-23 19:37:55,944 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 101 states. [2018-09-23 19:37:56,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:56,143 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-09-23 19:37:56,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-09-23 19:37:56,143 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 101 [2018-09-23 19:37:56,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:56,144 INFO L225 Difference]: With dead ends: 105 [2018-09-23 19:37:56,144 INFO L226 Difference]: Without dead ends: 103 [2018-09-23 19:37:56,145 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-09-23 19:37:56,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-23 19:37:56,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-23 19:37:56,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-23 19:37:56,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-09-23 19:37:56,147 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101 [2018-09-23 19:37:56,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:56,147 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-09-23 19:37:56,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-23 19:37:56,147 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-09-23 19:37:56,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-23 19:37:56,148 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:56,148 INFO L375 BasicCegarLoop]: trace histogram [99, 1, 1, 1] [2018-09-23 19:37:56,148 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:56,148 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:56,148 INFO L82 PathProgramCache]: Analyzing trace with hash 259399752, now seen corresponding path program 99 times [2018-09-23 19:37:56,148 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:56,149 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:56,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:56,149 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:56,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:56,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:38:00,219 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 19:38:00,219 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:38:00,219 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:38:00,227 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:38:00,447 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2018-09-23 19:38:00,448 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:38:00,452 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:38:00,471 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 19:38:00,493 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:38:00,493 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-09-23 19:38:00,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-23 19:38:00,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-23 19:38:00,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-09-23 19:38:00,495 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 102 states. [2018-09-23 19:38:00,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:38:00,779 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2018-09-23 19:38:00,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-09-23 19:38:00,780 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 102 [2018-09-23 19:38:00,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:38:00,781 INFO L225 Difference]: With dead ends: 106 [2018-09-23 19:38:00,781 INFO L226 Difference]: Without dead ends: 104 [2018-09-23 19:38:00,781 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-09-23 19:38:00,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-09-23 19:38:00,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-09-23 19:38:00,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-09-23 19:38:00,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-09-23 19:38:00,784 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102 [2018-09-23 19:38:00,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:38:00,785 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-09-23 19:38:00,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-23 19:38:00,785 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-09-23 19:38:00,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-09-23 19:38:00,785 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:38:00,785 INFO L375 BasicCegarLoop]: trace histogram [100, 1, 1, 1] [2018-09-23 19:38:00,786 INFO L423 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:38:00,786 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:38:00,786 INFO L82 PathProgramCache]: Analyzing trace with hash -548544255, now seen corresponding path program 100 times [2018-09-23 19:38:00,786 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:38:00,786 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:38:00,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:00,787 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:38:00,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:00,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:38:04,890 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 19:38:04,891 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:38:04,891 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 19:38:04,898 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:38:05,050 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:38:05,050 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:38:05,054 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:38:05,073 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 19:38:05,094 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:38:05,094 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-09-23 19:38:05,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-09-23 19:38:05,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-09-23 19:38:05,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-09-23 19:38:05,095 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 103 states. [2018-09-23 19:38:05,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:38:05,288 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-09-23 19:38:05,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-23 19:38:05,288 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 103 [2018-09-23 19:38:05,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:38:05,289 INFO L225 Difference]: With dead ends: 107 [2018-09-23 19:38:05,290 INFO L226 Difference]: Without dead ends: 105 [2018-09-23 19:38:05,290 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-09-23 19:38:05,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-09-23 19:38:05,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-09-23 19:38:05,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-23 19:38:05,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-09-23 19:38:05,294 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 103 [2018-09-23 19:38:05,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:38:05,294 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-09-23 19:38:05,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-09-23 19:38:05,294 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-09-23 19:38:05,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-23 19:38:05,295 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:38:05,295 INFO L375 BasicCegarLoop]: trace histogram [101, 1, 1, 1] [2018-09-23 19:38:05,295 INFO L423 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:38:05,295 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:38:05,295 INFO L82 PathProgramCache]: Analyzing trace with hash 174995304, now seen corresponding path program 101 times [2018-09-23 19:38:05,295 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:38:05,295 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:38:05,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:05,296 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:38:05,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:05,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:38:09,057 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 19:38:09,057 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:38:09,057 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:38:09,064 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:38:09,285 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2018-09-23 19:38:09,285 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:38:09,292 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:38:09,311 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 19:38:09,332 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:38:09,332 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-09-23 19:38:09,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-23 19:38:09,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-23 19:38:09,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-09-23 19:38:09,334 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 104 states. [2018-09-23 19:38:09,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:38:09,604 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2018-09-23 19:38:09,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-09-23 19:38:09,605 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 104 [2018-09-23 19:38:09,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:38:09,606 INFO L225 Difference]: With dead ends: 108 [2018-09-23 19:38:09,606 INFO L226 Difference]: Without dead ends: 106 [2018-09-23 19:38:09,606 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-09-23 19:38:09,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-09-23 19:38:09,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-09-23 19:38:09,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-09-23 19:38:09,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-09-23 19:38:09,609 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 104 [2018-09-23 19:38:09,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:38:09,609 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-09-23 19:38:09,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-23 19:38:09,610 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-09-23 19:38:09,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-09-23 19:38:09,610 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:38:09,610 INFO L375 BasicCegarLoop]: trace histogram [102, 1, 1, 1] [2018-09-23 19:38:09,611 INFO L423 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:38:09,611 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:38:09,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1129885153, now seen corresponding path program 102 times [2018-09-23 19:38:09,611 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:38:09,611 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:38:09,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:09,612 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:38:09,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:09,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:38:13,572 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 19:38:13,572 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:38:13,572 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:38:13,582 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:38:13,799 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2018-09-23 19:38:13,800 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:38:13,806 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:38:13,832 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 19:38:13,855 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:38:13,855 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-09-23 19:38:13,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-09-23 19:38:13,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-09-23 19:38:13,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-09-23 19:38:13,857 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 105 states. [2018-09-23 19:38:14,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:38:14,162 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-09-23 19:38:14,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-09-23 19:38:14,163 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 105 [2018-09-23 19:38:14,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:38:14,164 INFO L225 Difference]: With dead ends: 109 [2018-09-23 19:38:14,164 INFO L226 Difference]: Without dead ends: 107 [2018-09-23 19:38:14,164 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-09-23 19:38:14,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-23 19:38:14,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-09-23 19:38:14,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-23 19:38:14,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-09-23 19:38:14,168 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 105 [2018-09-23 19:38:14,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:38:14,168 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-09-23 19:38:14,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-09-23 19:38:14,168 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-09-23 19:38:14,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-23 19:38:14,169 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:38:14,169 INFO L375 BasicCegarLoop]: trace histogram [103, 1, 1, 1] [2018-09-23 19:38:14,169 INFO L423 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:38:14,169 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:38:14,169 INFO L82 PathProgramCache]: Analyzing trace with hash 666699400, now seen corresponding path program 103 times [2018-09-23 19:38:14,170 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:38:14,170 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:38:14,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:14,170 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:38:14,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:14,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:38:18,326 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 19:38:18,327 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:38:18,327 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 19:38:18,334 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:38:18,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:38:18,488 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:38:18,516 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 19:38:18,546 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:38:18,546 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-09-23 19:38:18,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-23 19:38:18,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-23 19:38:18,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-09-23 19:38:18,548 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 106 states. [2018-09-23 19:38:18,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:38:18,975 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2018-09-23 19:38:18,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-09-23 19:38:18,976 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 106 [2018-09-23 19:38:18,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:38:18,977 INFO L225 Difference]: With dead ends: 110 [2018-09-23 19:38:18,977 INFO L226 Difference]: Without dead ends: 108 [2018-09-23 19:38:18,977 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-09-23 19:38:18,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-09-23 19:38:18,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-09-23 19:38:18,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-09-23 19:38:18,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-09-23 19:38:18,980 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 106 [2018-09-23 19:38:18,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:38:18,981 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-09-23 19:38:18,981 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-23 19:38:18,981 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-09-23 19:38:18,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-09-23 19:38:18,981 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:38:18,982 INFO L375 BasicCegarLoop]: trace histogram [104, 1, 1, 1] [2018-09-23 19:38:18,982 INFO L423 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:38:18,982 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:38:18,982 INFO L82 PathProgramCache]: Analyzing trace with hash -807157055, now seen corresponding path program 104 times [2018-09-23 19:38:18,982 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:38:18,982 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:38:18,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:18,983 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:38:18,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:19,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:38:23,243 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 19:38:23,243 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:38:23,244 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 19:38:23,251 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:38:23,410 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:38:23,410 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:38:23,415 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:38:23,438 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 19:38:23,458 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:38:23,458 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106 [2018-09-23 19:38:23,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-09-23 19:38:23,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-09-23 19:38:23,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-09-23 19:38:23,460 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 107 states. [2018-09-23 19:38:23,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:38:23,641 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-09-23 19:38:23,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-09-23 19:38:23,641 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 107 [2018-09-23 19:38:23,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:38:23,642 INFO L225 Difference]: With dead ends: 111 [2018-09-23 19:38:23,642 INFO L226 Difference]: Without dead ends: 109 [2018-09-23 19:38:23,642 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-09-23 19:38:23,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-23 19:38:23,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-23 19:38:23,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-23 19:38:23,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-09-23 19:38:23,646 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 107 [2018-09-23 19:38:23,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:38:23,646 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-09-23 19:38:23,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-09-23 19:38:23,646 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-09-23 19:38:23,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-23 19:38:23,647 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:38:23,647 INFO L375 BasicCegarLoop]: trace histogram [105, 1, 1, 1] [2018-09-23 19:38:23,647 INFO L423 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:38:23,648 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:38:23,648 INFO L82 PathProgramCache]: Analyzing trace with hash 747933096, now seen corresponding path program 105 times [2018-09-23 19:38:23,648 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:38:23,648 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:38:23,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:23,648 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:38:23,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:23,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:38:28,013 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 19:38:28,014 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:38:28,014 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 19:38:28,022 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:38:28,259 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2018-09-23 19:38:28,260 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:38:28,264 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:38:28,288 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 19:38:28,316 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:38:28,316 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-09-23 19:38:28,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-23 19:38:28,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-23 19:38:28,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-09-23 19:38:28,318 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 108 states. [2018-09-23 19:38:28,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:38:28,641 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2018-09-23 19:38:28,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-09-23 19:38:28,642 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 108 [2018-09-23 19:38:28,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:38:28,643 INFO L225 Difference]: With dead ends: 112 [2018-09-23 19:38:28,643 INFO L226 Difference]: Without dead ends: 110 [2018-09-23 19:38:28,643 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-09-23 19:38:28,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-09-23 19:38:28,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-09-23 19:38:28,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-09-23 19:38:28,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-09-23 19:38:28,645 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 108 [2018-09-23 19:38:28,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:38:28,645 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-09-23 19:38:28,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-23 19:38:28,645 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-09-23 19:38:28,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-09-23 19:38:28,646 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:38:28,646 INFO L375 BasicCegarLoop]: trace histogram [106, 1, 1, 1] [2018-09-23 19:38:28,646 INFO L423 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:38:28,646 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:38:28,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1711087521, now seen corresponding path program 106 times [2018-09-23 19:38:28,647 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:38:28,647 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:38:28,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:28,647 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:38:28,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:28,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:38:32,959 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 19:38:32,959 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:38:32,959 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 19:38:32,967 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:38:33,126 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:38:33,126 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:38:33,131 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:38:33,151 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 19:38:33,171 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:38:33,172 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 108 [2018-09-23 19:38:33,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-09-23 19:38:33,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-09-23 19:38:33,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-09-23 19:38:33,173 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 109 states. [2018-09-23 19:38:33,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:38:33,514 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-09-23 19:38:33,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-09-23 19:38:33,515 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 109 [2018-09-23 19:38:33,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:38:33,515 INFO L225 Difference]: With dead ends: 113 [2018-09-23 19:38:33,515 INFO L226 Difference]: Without dead ends: 111 [2018-09-23 19:38:33,516 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-09-23 19:38:33,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-23 19:38:33,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-09-23 19:38:33,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-23 19:38:33,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-09-23 19:38:33,518 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 109 [2018-09-23 19:38:33,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:38:33,518 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-09-23 19:38:33,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-09-23 19:38:33,518 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-09-23 19:38:33,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-23 19:38:33,519 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:38:33,519 INFO L375 BasicCegarLoop]: trace histogram [107, 1, 1, 1] [2018-09-23 19:38:33,519 INFO L423 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:38:33,519 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:38:33,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1504103624, now seen corresponding path program 107 times [2018-09-23 19:38:33,520 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:38:33,520 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:38:33,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:33,520 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:38:33,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:33,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:38:37,937 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 19:38:37,937 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:38:37,937 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 19:38:37,948 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:38:38,186 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2018-09-23 19:38:38,186 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:38:38,193 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:38:38,213 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 19:38:38,234 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:38:38,234 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109] total 109 [2018-09-23 19:38:38,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-09-23 19:38:38,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-09-23 19:38:38,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-09-23 19:38:38,236 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 110 states. [2018-09-23 19:38:38,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:38:38,541 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2018-09-23 19:38:38,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-09-23 19:38:38,542 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 110 [2018-09-23 19:38:38,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:38:38,542 INFO L225 Difference]: With dead ends: 114 [2018-09-23 19:38:38,543 INFO L226 Difference]: Without dead ends: 112 [2018-09-23 19:38:38,543 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 19:38:38,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-09-23 19:38:38,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-09-23 19:38:38,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-09-23 19:38:38,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-09-23 19:38:38,546 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 110 [2018-09-23 19:38:38,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:38:38,546 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-09-23 19:38:38,546 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-09-23 19:38:38,546 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-09-23 19:38:38,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-09-23 19:38:38,547 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:38:38,547 INFO L375 BasicCegarLoop]: trace histogram [108, 1, 1, 1] [2018-09-23 19:38:38,547 INFO L423 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:38:38,547 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:38:38,547 INFO L82 PathProgramCache]: Analyzing trace with hash -617429887, now seen corresponding path program 108 times [2018-09-23 19:38:38,548 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:38:38,548 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:38:38,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:38,548 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:38:38,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:38,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:38:43,055 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 19:38:43,055 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:38:43,055 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 19:38:43,062 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:38:43,294 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-09-23 19:38:43,294 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:38:43,301 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:38:43,341 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 19:38:43,362 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:38:43,362 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 110] total 110 [2018-09-23 19:38:43,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 111 states [2018-09-23 19:38:43,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2018-09-23 19:38:43,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-09-23 19:38:43,364 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 111 states. [2018-09-23 19:38:43,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:38:43,670 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-09-23 19:38:43,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-09-23 19:38:43,670 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 111 [2018-09-23 19:38:43,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:38:43,671 INFO L225 Difference]: With dead ends: 115 [2018-09-23 19:38:43,671 INFO L226 Difference]: Without dead ends: 113 [2018-09-23 19:38:43,672 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-09-23 19:38:43,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-23 19:38:43,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-09-23 19:38:43,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-23 19:38:43,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-09-23 19:38:43,675 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 111 [2018-09-23 19:38:43,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:38:43,675 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-09-23 19:38:43,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has 111 states. [2018-09-23 19:38:43,675 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-09-23 19:38:43,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-23 19:38:43,676 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:38:43,676 INFO L375 BasicCegarLoop]: trace histogram [109, 1, 1, 1] [2018-09-23 19:38:43,676 INFO L423 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:38:43,677 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:38:43,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1960459288, now seen corresponding path program 109 times [2018-09-23 19:38:43,677 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:38:43,677 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:38:43,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:43,678 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:38:43,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:43,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-09-23 19:38:47,250 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-23 19:38:47,254 WARN L206 ceAbstractionStarter]: Timeout [2018-09-23 19:38:47,254 INFO L202 PluginConnector]: Adding new model count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.09 07:38:47 BoogieIcfgContainer [2018-09-23 19:38:47,255 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-23 19:38:47,255 INFO L168 Benchmark]: Toolchain (without parser) took 234041.33 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 57.1 MB). Free memory was 1.5 GB in the beginning and 1.2 GB in the end (delta: 265.8 MB). Peak memory consumption was 322.9 MB. Max. memory is 7.1 GB. [2018-09-23 19:38:47,257 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.18 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 19:38:47,257 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.92 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 19:38:47,257 INFO L168 Benchmark]: Boogie Preprocessor took 19.66 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 19:38:47,258 INFO L168 Benchmark]: RCFGBuilder took 283.92 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 19:38:47,258 INFO L168 Benchmark]: TraceAbstraction took 233691.29 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 57.1 MB). Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 244.6 MB). Peak memory consumption was 301.8 MB. Max. memory is 7.1 GB. [2018-09-23 19:38:47,260 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.18 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 40.92 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 19.66 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 283.92 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 233691.29 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 57.1 MB). Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 244.6 MB). Peak memory consumption was 301.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 43]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 43). Cancelled while BasicCegarLoop was analyzing trace of length 113 with TraceHistMax 109, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 97 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 233.6s OverallTime, 110 OverallIterations, 109 TraceHistogramMax, 21.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 327 SDtfs, 0 SDslu, 4678 SDs, 0 SdLazy, 10782 SolverSat, 161 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 15.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12206 GetRequests, 6211 SyntacticMatches, 0 SemanticMatches, 5995 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 185.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=113occurred in iteration=109, 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, 109 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.7s SsaConstructionTime, 11.3s SatisfiabilityAnalysisTime, 190.3s InterpolantComputationTime, 12423 NumberOfCodeBlocks, 12423 NumberOfCodeBlocksAsserted, 1774 NumberOfCheckSat, 12206 ConstructedInterpolants, 0 QuantifiedInterpolants, 2673980 SizeOfPredicates, 109 NumberOfNonLiveVariables, 66366 ConjunctsInSsa, 6103 ConjunctsInUnsatCore, 217 InterpolantComputations, 1 PerfectInterpolantSequences, 0/431640 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_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-23_19-38-47-268.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/count_by_nondet.i_3.bplTransformedIcfg_BEv2_3.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-23_19-38-47-268.csv Completed graceful shutdown