java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/count_by_2.i_3.bplTransformedIcfg_BEv2_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-00a8621 [2018-09-30 10:15:42,198 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 10:15:42,199 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 10:15:42,213 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 10:15:42,214 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 10:15:42,215 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 10:15:42,216 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 10:15:42,218 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 10:15:42,219 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 10:15:42,220 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 10:15:42,221 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-30 10:15:42,221 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-30 10:15:42,222 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-30 10:15:42,223 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-30 10:15:42,224 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-30 10:15:42,225 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-30 10:15:42,226 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-30 10:15:42,228 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-30 10:15:42,230 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-30 10:15:42,231 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-30 10:15:42,233 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-30 10:15:42,234 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-30 10:15:42,236 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-09-30 10:15:42,245 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-30 10:15:42,260 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 10:15:42,260 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 10:15:42,261 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 10:15:42,261 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 10:15:42,262 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 10:15:42,262 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 10:15:42,262 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 10:15:42,262 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 10:15:42,262 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 10:15:42,263 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 10:15:42,263 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 10:15:42,263 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 10:15:42,263 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 10:15:42,263 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 10:15:42,263 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 10:15:42,264 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 10:15:42,264 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 10:15:42,264 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 10:15:42,264 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 10:15:42,264 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 10:15:42,265 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 10:15:42,265 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 10:15:42,265 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 10:15:42,265 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 10:15:42,265 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 10:15:42,266 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 10:15:42,266 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 10:15:42,266 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 10:15:42,266 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 10:15:42,266 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 10:15:42,316 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 10:15:42,334 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 10:15:42,338 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 10:15:42,340 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 10:15:42,340 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 10:15:42,341 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/count_by_2.i_3.bplTransformedIcfg_BEv2_3.bpl [2018-09-30 10:15:42,341 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/count_by_2.i_3.bplTransformedIcfg_BEv2_3.bpl' [2018-09-30 10:15:42,385 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 10:15:42,388 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 10:15:42,389 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 10:15:42,389 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 10:15:42,389 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 10:15:42,409 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "count_by_2.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:15:42" (1/1) ... [2018-09-30 10:15:42,421 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "count_by_2.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:15:42" (1/1) ... [2018-09-30 10:15:42,427 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 10:15:42,428 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 10:15:42,429 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 10:15:42,429 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 10:15:42,440 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "count_by_2.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:15:42" (1/1) ... [2018-09-30 10:15:42,440 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "count_by_2.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:15:42" (1/1) ... [2018-09-30 10:15:42,441 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "count_by_2.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:15:42" (1/1) ... [2018-09-30 10:15:42,441 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "count_by_2.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:15:42" (1/1) ... [2018-09-30 10:15:42,443 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "count_by_2.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:15:42" (1/1) ... [2018-09-30 10:15:42,445 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "count_by_2.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:15:42" (1/1) ... [2018-09-30 10:15:42,446 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "count_by_2.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:15:42" (1/1) ... [2018-09-30 10:15:42,447 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 10:15:42,447 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 10:15:42,447 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 10:15:42,448 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 10:15:42,449 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "count_by_2.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:15:42" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 10:15:42,510 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-09-30 10:15:42,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-30 10:15:42,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-30 10:15:42,685 INFO L348 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-30 10:15:42,686 INFO L202 PluginConnector]: Adding new model count_by_2.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 10:15:42 BoogieIcfgContainer [2018-09-30 10:15:42,686 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 10:15:42,687 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 10:15:42,687 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 10:15:42,690 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 10:15:42,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "count_by_2.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:15:42" (1/2) ... [2018-09-30 10:15:42,691 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a3fb251 and model type count_by_2.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 10:15:42, skipping insertion in model container [2018-09-30 10:15:42,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "count_by_2.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 10:15:42" (2/2) ... [2018-09-30 10:15:42,695 INFO L112 eAbstractionObserver]: Analyzing ICFG count_by_2.i_3.bplTransformedIcfg_BEv2_3.bpl [2018-09-30 10:15:42,704 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 10:15:42,712 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 10:15:42,765 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 10:15:42,766 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 10:15:42,766 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 10:15:42,767 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 10:15:42,767 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 10:15:42,767 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 10:15:42,767 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 10:15:42,767 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 10:15:42,768 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 10:15:42,780 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-09-30 10:15:42,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-30 10:15:42,787 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:42,788 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-30 10:15:42,789 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:42,795 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:42,795 INFO L82 PathProgramCache]: Analyzing trace with hash 30017, now seen corresponding path program 1 times [2018-09-30 10:15:42,798 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:42,798 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:42,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:42,846 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:42,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:42,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:42,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:42,935 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 10:15:42,936 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-30 10:15:42,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 10:15:42,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 10:15:42,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 10:15:42,957 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-09-30 10:15:42,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:42,995 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2018-09-30 10:15:42,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 10:15:42,997 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-30 10:15:42,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:43,008 INFO L225 Difference]: With dead ends: 9 [2018-09-30 10:15:43,008 INFO L226 Difference]: Without dead ends: 5 [2018-09-30 10:15:43,012 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 [2018-09-30 10:15:43,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-09-30 10:15:43,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-09-30 10:15:43,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-09-30 10:15:43,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-09-30 10:15:43,050 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-09-30 10:15:43,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:43,050 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-09-30 10:15:43,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 10:15:43,051 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-09-30 10:15:43,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-30 10:15:43,051 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:43,051 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-30 10:15:43,052 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:43,052 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:43,052 INFO L82 PathProgramCache]: Analyzing trace with hash 928552, now seen corresponding path program 1 times [2018-09-30 10:15:43,052 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:43,053 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:43,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:43,054 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:43,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:43,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:43,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:43,145 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:43,146 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:15:43,172 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:43,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:43,208 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:43,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:43,265 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:15:43,266 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-30 10:15:43,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 10:15:43,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 10:15:43,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-30 10:15:43,270 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 4 states. [2018-09-30 10:15:43,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:43,380 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-09-30 10:15:43,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 10:15:43,381 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-09-30 10:15:43,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:43,382 INFO L225 Difference]: With dead ends: 8 [2018-09-30 10:15:43,382 INFO L226 Difference]: Without dead ends: 6 [2018-09-30 10:15:43,383 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-30 10:15:43,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-30 10:15:43,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-30 10:15:43,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-30 10:15:43,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-30 10:15:43,386 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-09-30 10:15:43,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:43,386 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-30 10:15:43,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 10:15:43,387 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-30 10:15:43,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-30 10:15:43,387 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:43,387 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-09-30 10:15:43,388 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:43,388 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:43,388 INFO L82 PathProgramCache]: Analyzing trace with hash 28783137, now seen corresponding path program 2 times [2018-09-30 10:15:43,388 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:43,389 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:43,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:43,393 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:43,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:43,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:43,568 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:43,569 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:43,569 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:15:43,577 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:15:43,599 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:15:43,599 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:15:43,602 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:43,611 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:43,636 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:15:43,637 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-30 10:15:43,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 10:15:43,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 10:15:43,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 10:15:43,638 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 5 states. [2018-09-30 10:15:43,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:43,690 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-30 10:15:43,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 10:15:43,691 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2018-09-30 10:15:43,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:43,691 INFO L225 Difference]: With dead ends: 9 [2018-09-30 10:15:43,691 INFO L226 Difference]: Without dead ends: 7 [2018-09-30 10:15:43,692 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 10:15:43,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-30 10:15:43,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-30 10:15:43,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-30 10:15:43,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-30 10:15:43,695 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-09-30 10:15:43,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:43,695 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-30 10:15:43,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 10:15:43,696 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-30 10:15:43,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-30 10:15:43,696 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:43,696 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2018-09-30 10:15:43,697 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:43,697 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:43,697 INFO L82 PathProgramCache]: Analyzing trace with hash 892275272, now seen corresponding path program 3 times [2018-09-30 10:15:43,697 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:43,698 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:43,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:43,699 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:15:43,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:43,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:43,792 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:43,793 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:43,793 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:15:43,805 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:15:43,818 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-30 10:15:43,819 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:15:43,822 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:43,830 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:43,850 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:15:43,851 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 10:15:43,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 10:15:43,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 10:15:43,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 10:15:43,852 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2018-09-30 10:15:43,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:43,924 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-09-30 10:15:43,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 10:15:43,925 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2018-09-30 10:15:43,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:43,925 INFO L225 Difference]: With dead ends: 10 [2018-09-30 10:15:43,926 INFO L226 Difference]: Without dead ends: 8 [2018-09-30 10:15:43,926 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 [2018-09-30 10:15:43,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-30 10:15:43,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-30 10:15:43,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-30 10:15:43,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-09-30 10:15:43,929 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-09-30 10:15:43,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:43,929 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-09-30 10:15:43,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 10:15:43,930 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-09-30 10:15:43,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-30 10:15:43,930 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:43,930 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1, 1] [2018-09-30 10:15:43,931 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:43,931 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:43,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1890727681, now seen corresponding path program 4 times [2018-09-30 10:15:43,931 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:43,931 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:43,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:43,932 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:15:43,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:43,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:44,152 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:44,152 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:44,153 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:15:44,163 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:15:44,191 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:15:44,192 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:15:44,193 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:44,200 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:44,230 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:15:44,231 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 10:15:44,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 10:15:44,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 10:15:44,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 10:15:44,235 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 7 states. [2018-09-30 10:15:44,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:44,287 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-30 10:15:44,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 10:15:44,288 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-09-30 10:15:44,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:44,289 INFO L225 Difference]: With dead ends: 11 [2018-09-30 10:15:44,290 INFO L226 Difference]: Without dead ends: 9 [2018-09-30 10:15:44,291 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 10:15:44,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-30 10:15:44,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-30 10:15:44,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-30 10:15:44,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-30 10:15:44,294 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-09-30 10:15:44,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:44,294 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-30 10:15:44,295 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 10:15:44,295 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-30 10:15:44,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 10:15:44,295 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:44,296 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1] [2018-09-30 10:15:44,296 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:44,296 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:44,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1516986008, now seen corresponding path program 5 times [2018-09-30 10:15:44,297 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:44,297 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:44,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:44,298 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:15:44,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:44,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:44,487 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:44,488 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:44,488 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:15:44,497 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:15:44,522 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-30 10:15:44,522 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:15:44,524 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:44,540 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:44,560 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:15:44,560 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:15:44,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:15:44,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:15:44,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:15:44,562 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 8 states. [2018-09-30 10:15:44,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:44,601 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-09-30 10:15:44,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:15:44,603 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2018-09-30 10:15:44,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:44,604 INFO L225 Difference]: With dead ends: 12 [2018-09-30 10:15:44,605 INFO L226 Difference]: Without dead ends: 10 [2018-09-30 10:15:44,606 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 [2018-09-30 10:15:44,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-30 10:15:44,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-30 10:15:44,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-30 10:15:44,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-30 10:15:44,609 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-09-30 10:15:44,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:44,609 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-30 10:15:44,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:15:44,609 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-30 10:15:44,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 10:15:44,610 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:44,610 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1, 1] [2018-09-30 10:15:44,610 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:44,611 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:44,611 INFO L82 PathProgramCache]: Analyzing trace with hash 218072033, now seen corresponding path program 6 times [2018-09-30 10:15:44,611 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:44,611 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:44,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:44,612 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:15:44,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:44,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:44,836 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:44,836 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:44,837 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:15:44,849 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:15:44,879 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-30 10:15:44,879 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:15:44,880 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:44,892 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:44,914 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:15:44,914 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:15:44,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:15:44,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:15:44,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:15:44,915 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 9 states. [2018-09-30 10:15:44,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:44,951 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-30 10:15:44,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:15:44,952 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2018-09-30 10:15:44,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:44,953 INFO L225 Difference]: With dead ends: 13 [2018-09-30 10:15:44,953 INFO L226 Difference]: Without dead ends: 11 [2018-09-30 10:15:44,954 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:15:44,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-30 10:15:44,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-30 10:15:44,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-30 10:15:44,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-30 10:15:44,958 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-09-30 10:15:44,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:44,958 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-30 10:15:44,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:15:44,959 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-30 10:15:44,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 10:15:44,959 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:44,959 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1, 1] [2018-09-30 10:15:44,960 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:44,960 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:44,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1829703544, now seen corresponding path program 7 times [2018-09-30 10:15:44,960 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:44,960 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:44,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:44,961 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:15:44,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:44,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:45,119 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:45,119 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:45,120 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:15:45,128 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:45,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:45,136 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:45,144 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:45,177 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:15:45,177 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:15:45,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:15:45,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:15:45,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:15:45,179 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-09-30 10:15:45,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:45,435 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-09-30 10:15:45,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:15:45,435 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2018-09-30 10:15:45,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:45,436 INFO L225 Difference]: With dead ends: 14 [2018-09-30 10:15:45,436 INFO L226 Difference]: Without dead ends: 12 [2018-09-30 10:15:45,437 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:15:45,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-30 10:15:45,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-30 10:15:45,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-30 10:15:45,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-30 10:15:45,442 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-09-30 10:15:45,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:45,443 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-30 10:15:45,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:15:45,443 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-30 10:15:45,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 10:15:45,444 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:45,444 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1, 1] [2018-09-30 10:15:45,445 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:45,445 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:45,445 INFO L82 PathProgramCache]: Analyzing trace with hash -886236991, now seen corresponding path program 8 times [2018-09-30 10:15:45,445 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:45,445 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:45,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:45,447 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:45,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:45,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:45,611 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:45,611 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:45,611 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:15:45,620 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:15:45,628 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:15:45,628 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:15:45,630 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:45,639 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:45,660 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:15:45,660 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:15:45,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:15:45,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:15:45,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:15:45,661 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 11 states. [2018-09-30 10:15:45,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:45,708 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-30 10:15:45,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:15:45,712 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2018-09-30 10:15:45,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:45,712 INFO L225 Difference]: With dead ends: 15 [2018-09-30 10:15:45,712 INFO L226 Difference]: Without dead ends: 13 [2018-09-30 10:15:45,713 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 [2018-09-30 10:15:45,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-30 10:15:45,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-30 10:15:45,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-30 10:15:45,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-30 10:15:45,717 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-09-30 10:15:45,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:45,717 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-30 10:15:45,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:15:45,717 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-30 10:15:45,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-30 10:15:45,718 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:45,718 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1, 1] [2018-09-30 10:15:45,718 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:45,718 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:45,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1703544920, now seen corresponding path program 9 times [2018-09-30 10:15:45,719 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:45,719 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:45,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:45,720 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:15:45,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:45,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:45,903 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:45,903 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:45,904 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:15:45,914 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:15:45,925 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-30 10:15:45,926 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:15:45,928 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:45,939 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:45,959 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:15:45,960 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-30 10:15:45,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 10:15:45,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 10:15:45,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-30 10:15:45,962 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 12 states. [2018-09-30 10:15:46,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:46,011 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-09-30 10:15:46,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 10:15:46,012 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2018-09-30 10:15:46,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:46,012 INFO L225 Difference]: With dead ends: 16 [2018-09-30 10:15:46,012 INFO L226 Difference]: Without dead ends: 14 [2018-09-30 10:15:46,013 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 [2018-09-30 10:15:46,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-30 10:15:46,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-30 10:15:46,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-30 10:15:46,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-30 10:15:46,016 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-09-30 10:15:46,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:46,017 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-30 10:15:46,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 10:15:46,017 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-30 10:15:46,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:15:46,017 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:46,017 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1, 1] [2018-09-30 10:15:46,018 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:46,018 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:46,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1270286943, now seen corresponding path program 10 times [2018-09-30 10:15:46,018 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:46,018 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:46,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:46,019 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:15:46,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:46,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:46,313 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:46,313 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:46,313 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:15:46,322 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:15:46,340 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:15:46,341 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:15:46,342 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:46,350 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:46,370 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:15:46,371 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-30 10:15:46,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 10:15:46,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 10:15:46,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-30 10:15:46,372 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 13 states. [2018-09-30 10:15:46,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:46,421 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-30 10:15:46,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 10:15:46,422 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 13 [2018-09-30 10:15:46,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:46,422 INFO L225 Difference]: With dead ends: 17 [2018-09-30 10:15:46,422 INFO L226 Difference]: Without dead ends: 15 [2018-09-30 10:15:46,423 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 [2018-09-30 10:15:46,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-30 10:15:46,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-30 10:15:46,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-30 10:15:46,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-30 10:15:46,426 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-09-30 10:15:46,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:46,427 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-30 10:15:46,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 10:15:46,427 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-30 10:15:46,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 10:15:46,427 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:46,427 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1, 1] [2018-09-30 10:15:46,428 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:46,428 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:46,428 INFO L82 PathProgramCache]: Analyzing trace with hash -724191544, now seen corresponding path program 11 times [2018-09-30 10:15:46,428 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:46,428 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:46,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:46,429 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:15:46,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:46,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:46,658 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:46,658 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:46,659 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:15:46,666 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:15:46,701 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 10:15:46,701 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:15:46,703 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:46,713 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:46,733 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:15:46,734 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-30 10:15:46,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 10:15:46,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 10:15:46,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-30 10:15:46,735 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 14 states. [2018-09-30 10:15:46,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:46,783 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-09-30 10:15:46,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 10:15:46,784 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-09-30 10:15:46,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:46,785 INFO L225 Difference]: With dead ends: 18 [2018-09-30 10:15:46,785 INFO L226 Difference]: Without dead ends: 16 [2018-09-30 10:15:46,786 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-30 10:15:46,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-30 10:15:46,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-30 10:15:46,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 10:15:46,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-09-30 10:15:46,789 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-09-30 10:15:46,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:46,790 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-09-30 10:15:46,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 10:15:46,790 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-09-30 10:15:46,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:15:46,790 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:46,790 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1, 1] [2018-09-30 10:15:46,791 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:46,791 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:46,791 INFO L82 PathProgramCache]: Analyzing trace with hash -975103359, now seen corresponding path program 12 times [2018-09-30 10:15:46,791 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:46,791 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:46,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:46,792 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:15:46,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:46,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:46,989 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:46,989 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:46,990 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:15:46,998 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:15:47,010 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 10:15:47,010 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:15:47,012 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:47,022 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:47,049 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:15:47,049 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-30 10:15:47,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 10:15:47,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 10:15:47,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-30 10:15:47,050 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 15 states. [2018-09-30 10:15:47,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:47,094 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-30 10:15:47,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 10:15:47,098 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-09-30 10:15:47,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:47,099 INFO L225 Difference]: With dead ends: 19 [2018-09-30 10:15:47,099 INFO L226 Difference]: Without dead ends: 17 [2018-09-30 10:15:47,099 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 [2018-09-30 10:15:47,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-30 10:15:47,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-30 10:15:47,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-30 10:15:47,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-30 10:15:47,103 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-09-30 10:15:47,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:47,103 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-30 10:15:47,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 10:15:47,103 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-30 10:15:47,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-30 10:15:47,104 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:47,104 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1, 1] [2018-09-30 10:15:47,104 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:47,104 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:47,105 INFO L82 PathProgramCache]: Analyzing trace with hash -163435032, now seen corresponding path program 13 times [2018-09-30 10:15:47,105 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:47,105 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:47,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:47,106 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:15:47,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:47,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:47,415 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:47,416 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:47,416 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:15:47,425 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:47,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:47,455 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:47,465 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:47,494 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:15:47,495 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-30 10:15:47,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 10:15:47,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 10:15:47,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-30 10:15:47,496 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 16 states. [2018-09-30 10:15:47,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:47,726 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-09-30 10:15:47,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 10:15:47,727 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2018-09-30 10:15:47,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:47,728 INFO L225 Difference]: With dead ends: 20 [2018-09-30 10:15:47,728 INFO L226 Difference]: Without dead ends: 18 [2018-09-30 10:15:47,728 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 [2018-09-30 10:15:47,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-30 10:15:47,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-30 10:15:47,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 10:15:47,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-09-30 10:15:47,732 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-09-30 10:15:47,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:47,732 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-09-30 10:15:47,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 10:15:47,732 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-09-30 10:15:47,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:15:47,733 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:47,733 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1, 1] [2018-09-30 10:15:47,733 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:47,733 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:47,734 INFO L82 PathProgramCache]: Analyzing trace with hash -771520671, now seen corresponding path program 14 times [2018-09-30 10:15:47,734 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:47,734 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:47,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:47,735 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:47,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:47,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:48,064 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:48,064 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:48,064 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:15:48,072 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:15:48,084 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:15:48,084 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:15:48,086 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:48,096 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:48,119 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:15:48,120 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-30 10:15:48,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 10:15:48,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 10:15:48,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-30 10:15:48,121 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 17 states. [2018-09-30 10:15:48,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:48,470 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-30 10:15:48,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 10:15:48,471 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2018-09-30 10:15:48,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:48,471 INFO L225 Difference]: With dead ends: 21 [2018-09-30 10:15:48,471 INFO L226 Difference]: Without dead ends: 19 [2018-09-30 10:15:48,472 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-30 10:15:48,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-30 10:15:48,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-30 10:15:48,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-30 10:15:48,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-30 10:15:48,476 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-09-30 10:15:48,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:48,476 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-30 10:15:48,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 10:15:48,476 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-30 10:15:48,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 10:15:48,477 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:48,477 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1, 1] [2018-09-30 10:15:48,477 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:48,478 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:48,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1852661000, now seen corresponding path program 15 times [2018-09-30 10:15:48,478 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:48,478 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:48,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:48,479 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:15:48,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:48,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:48,750 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:48,750 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:48,750 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:15:48,760 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:15:48,772 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 10:15:48,773 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:15:48,774 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:48,783 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:48,806 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:15:48,806 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-30 10:15:48,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 10:15:48,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 10:15:48,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-30 10:15:48,807 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 18 states. [2018-09-30 10:15:48,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:48,830 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-09-30 10:15:48,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 10:15:48,831 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-09-30 10:15:48,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:48,832 INFO L225 Difference]: With dead ends: 22 [2018-09-30 10:15:48,832 INFO L226 Difference]: Without dead ends: 20 [2018-09-30 10:15:48,833 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 [2018-09-30 10:15:48,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-30 10:15:48,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-30 10:15:48,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 10:15:48,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-09-30 10:15:48,837 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-09-30 10:15:48,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:48,837 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-09-30 10:15:48,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 10:15:48,837 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-09-30 10:15:48,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:15:48,838 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:48,838 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1, 1] [2018-09-30 10:15:48,838 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:48,838 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:48,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1597914177, now seen corresponding path program 16 times [2018-09-30 10:15:48,838 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:48,838 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:48,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:48,839 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:15:48,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:48,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:49,079 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:49,080 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:49,080 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:15:49,088 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:15:49,099 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:15:49,099 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:15:49,101 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:49,111 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:49,132 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:15:49,132 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-30 10:15:49,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 10:15:49,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 10:15:49,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-30 10:15:49,133 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 19 states. [2018-09-30 10:15:49,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:49,191 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-30 10:15:49,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 10:15:49,192 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2018-09-30 10:15:49,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:49,192 INFO L225 Difference]: With dead ends: 23 [2018-09-30 10:15:49,193 INFO L226 Difference]: Without dead ends: 21 [2018-09-30 10:15:49,193 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-30 10:15:49,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-30 10:15:49,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-30 10:15:49,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-30 10:15:49,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-30 10:15:49,197 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-09-30 10:15:49,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:49,197 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-30 10:15:49,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 10:15:49,197 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-30 10:15:49,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 10:15:49,198 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:49,198 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1, 1] [2018-09-30 10:15:49,198 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:49,198 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:49,198 INFO L82 PathProgramCache]: Analyzing trace with hash -2004270040, now seen corresponding path program 17 times [2018-09-30 10:15:49,198 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:49,199 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:49,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:49,199 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:15:49,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:49,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:49,997 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:49,998 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:49,998 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:15:50,005 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:15:50,037 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-30 10:15:50,038 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:15:50,040 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:50,053 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:50,082 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:15:50,082 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-30 10:15:50,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 10:15:50,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 10:15:50,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-30 10:15:50,084 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 20 states. [2018-09-30 10:15:50,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:50,244 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-09-30 10:15:50,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 10:15:50,245 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2018-09-30 10:15:50,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:50,246 INFO L225 Difference]: With dead ends: 24 [2018-09-30 10:15:50,246 INFO L226 Difference]: Without dead ends: 22 [2018-09-30 10:15:50,247 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-30 10:15:50,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-30 10:15:50,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-30 10:15:50,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 10:15:50,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-09-30 10:15:50,251 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-09-30 10:15:50,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:50,251 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-09-30 10:15:50,251 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 10:15:50,251 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-09-30 10:15:50,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 10:15:50,252 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:50,252 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1, 1] [2018-09-30 10:15:50,252 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:50,253 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:50,253 INFO L82 PathProgramCache]: Analyzing trace with hash -2002831071, now seen corresponding path program 18 times [2018-09-30 10:15:50,253 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:50,253 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:50,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:50,254 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:15:50,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:50,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:50,491 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:50,491 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:50,491 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:15:50,501 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:15:50,519 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-09-30 10:15:50,519 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:15:50,521 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:50,531 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:50,560 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:15:50,560 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-30 10:15:50,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 10:15:50,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 10:15:50,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-30 10:15:50,562 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 21 states. [2018-09-30 10:15:50,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:50,629 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-30 10:15:50,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 10:15:50,630 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 21 [2018-09-30 10:15:50,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:50,631 INFO L225 Difference]: With dead ends: 25 [2018-09-30 10:15:50,631 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 10:15:50,632 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-30 10:15:50,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 10:15:50,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-30 10:15:50,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-30 10:15:50,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-30 10:15:50,636 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-09-30 10:15:50,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:50,636 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-30 10:15:50,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 10:15:50,637 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-30 10:15:50,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 10:15:50,637 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:50,638 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1, 1] [2018-09-30 10:15:50,638 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:50,638 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:50,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1958223032, now seen corresponding path program 19 times [2018-09-30 10:15:50,638 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:50,639 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:50,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:50,639 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:15:50,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:50,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:51,093 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:51,093 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:51,093 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:15:51,102 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:51,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:51,116 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:51,127 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:51,156 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:15:51,156 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-30 10:15:51,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 10:15:51,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 10:15:51,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-30 10:15:51,157 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 22 states. [2018-09-30 10:15:51,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:51,248 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-09-30 10:15:51,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 10:15:51,248 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2018-09-30 10:15:51,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:51,249 INFO L225 Difference]: With dead ends: 26 [2018-09-30 10:15:51,249 INFO L226 Difference]: Without dead ends: 24 [2018-09-30 10:15:51,250 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-30 10:15:51,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-30 10:15:51,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-30 10:15:51,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 10:15:51,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-09-30 10:15:51,254 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-09-30 10:15:51,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:51,254 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-09-30 10:15:51,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 10:15:51,254 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-09-30 10:15:51,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-30 10:15:51,255 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:51,255 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1, 1] [2018-09-30 10:15:51,255 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:51,256 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:51,256 INFO L82 PathProgramCache]: Analyzing trace with hash -575373823, now seen corresponding path program 20 times [2018-09-30 10:15:51,256 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:51,256 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:51,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:51,257 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:51,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:51,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:51,533 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:51,534 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:51,534 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:15:51,541 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:15:51,566 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:15:51,567 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:15:51,569 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:51,578 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:51,606 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:15:51,606 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-30 10:15:51,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-30 10:15:51,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-30 10:15:51,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-30 10:15:51,608 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 23 states. [2018-09-30 10:15:51,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:51,762 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-30 10:15:51,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 10:15:51,763 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 23 [2018-09-30 10:15:51,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:51,764 INFO L225 Difference]: With dead ends: 27 [2018-09-30 10:15:51,764 INFO L226 Difference]: Without dead ends: 25 [2018-09-30 10:15:51,764 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-30 10:15:51,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-30 10:15:51,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-30 10:15:51,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-30 10:15:51,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-30 10:15:51,769 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-09-30 10:15:51,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:51,769 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-30 10:15:51,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-30 10:15:51,770 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-30 10:15:51,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-30 10:15:51,770 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:51,770 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1, 1] [2018-09-30 10:15:51,771 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:51,771 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:51,771 INFO L82 PathProgramCache]: Analyzing trace with hash -656721304, now seen corresponding path program 21 times [2018-09-30 10:15:51,771 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:51,771 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:51,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:51,772 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:15:51,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:51,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:52,342 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:52,342 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:52,342 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:15:52,350 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:15:52,364 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-30 10:15:52,364 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:15:52,366 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:52,375 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:52,406 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:15:52,406 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-30 10:15:52,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 10:15:52,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 10:15:52,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-30 10:15:52,407 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 24 states. [2018-09-30 10:15:52,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:52,488 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-09-30 10:15:52,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 10:15:52,491 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 24 [2018-09-30 10:15:52,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:52,491 INFO L225 Difference]: With dead ends: 28 [2018-09-30 10:15:52,491 INFO L226 Difference]: Without dead ends: 26 [2018-09-30 10:15:52,492 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-30 10:15:52,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-30 10:15:52,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-30 10:15:52,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:15:52,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-09-30 10:15:52,495 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-09-30 10:15:52,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:52,495 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-09-30 10:15:52,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 10:15:52,495 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-09-30 10:15:52,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-30 10:15:52,496 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:52,496 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1, 1] [2018-09-30 10:15:52,496 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:52,496 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:52,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1116474081, now seen corresponding path program 22 times [2018-09-30 10:15:52,497 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:52,497 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:52,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:52,498 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:15:52,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:52,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:52,882 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:52,882 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:52,882 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:15:52,889 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:15:52,903 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:15:52,904 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:15:52,905 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:52,915 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:52,941 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:15:52,941 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-30 10:15:52,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-30 10:15:52,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-30 10:15:52,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-30 10:15:52,942 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 25 states. [2018-09-30 10:15:53,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:53,005 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-30 10:15:53,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 10:15:53,005 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 25 [2018-09-30 10:15:53,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:53,006 INFO L225 Difference]: With dead ends: 29 [2018-09-30 10:15:53,006 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 10:15:53,007 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 [2018-09-30 10:15:53,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 10:15:53,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-30 10:15:53,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-30 10:15:53,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-30 10:15:53,014 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-09-30 10:15:53,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:53,016 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-30 10:15:53,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-30 10:15:53,016 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-30 10:15:53,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-30 10:15:53,017 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:53,017 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1, 1] [2018-09-30 10:15:53,017 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:53,017 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:53,017 INFO L82 PathProgramCache]: Analyzing trace with hash 250956168, now seen corresponding path program 23 times [2018-09-30 10:15:53,018 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:53,018 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:53,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:53,019 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:15:53,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:53,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:54,278 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:54,279 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:54,279 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:15:54,292 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:15:54,322 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-30 10:15:54,323 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:15:54,326 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:54,337 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:54,367 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:15:54,368 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-30 10:15:54,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 10:15:54,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 10:15:54,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-30 10:15:54,369 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 26 states. [2018-09-30 10:15:54,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:54,440 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-09-30 10:15:54,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 10:15:54,440 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 26 [2018-09-30 10:15:54,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:54,441 INFO L225 Difference]: With dead ends: 30 [2018-09-30 10:15:54,441 INFO L226 Difference]: Without dead ends: 28 [2018-09-30 10:15:54,442 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-30 10:15:54,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-30 10:15:54,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-30 10:15:54,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:15:54,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-09-30 10:15:54,446 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-09-30 10:15:54,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:54,446 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-09-30 10:15:54,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 10:15:54,446 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-09-30 10:15:54,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-30 10:15:54,447 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:54,447 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1, 1] [2018-09-30 10:15:54,447 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:54,448 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:54,448 INFO L82 PathProgramCache]: Analyzing trace with hash -810295359, now seen corresponding path program 24 times [2018-09-30 10:15:54,449 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:54,449 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:54,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:54,450 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:15:54,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:54,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:55,309 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:55,310 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:55,310 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:15:55,317 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:15:55,331 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-30 10:15:55,331 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:15:55,333 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:55,343 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:55,366 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:15:55,366 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-30 10:15:55,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-30 10:15:55,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-30 10:15:55,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-30 10:15:55,367 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 27 states. [2018-09-30 10:15:55,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:55,427 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-30 10:15:55,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 10:15:55,428 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 27 [2018-09-30 10:15:55,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:55,429 INFO L225 Difference]: With dead ends: 31 [2018-09-30 10:15:55,429 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 10:15:55,429 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 [2018-09-30 10:15:55,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 10:15:55,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-30 10:15:55,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-30 10:15:55,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-30 10:15:55,433 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-09-30 10:15:55,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:55,433 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-30 10:15:55,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-30 10:15:55,434 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-30 10:15:55,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-30 10:15:55,434 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:55,434 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1, 1] [2018-09-30 10:15:55,435 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:55,435 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:55,435 INFO L82 PathProgramCache]: Analyzing trace with hash 650645672, now seen corresponding path program 25 times [2018-09-30 10:15:55,435 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:55,435 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:55,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:55,436 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:15:55,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:55,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:56,192 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:56,193 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:56,193 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:15:56,205 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:56,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:56,220 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:56,229 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:56,252 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:15:56,253 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-30 10:15:56,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 10:15:56,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 10:15:56,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-30 10:15:56,254 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 28 states. [2018-09-30 10:15:56,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:56,303 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-09-30 10:15:56,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-30 10:15:56,304 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 28 [2018-09-30 10:15:56,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:56,305 INFO L225 Difference]: With dead ends: 32 [2018-09-30 10:15:56,305 INFO L226 Difference]: Without dead ends: 30 [2018-09-30 10:15:56,306 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-30 10:15:56,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-30 10:15:56,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-30 10:15:56,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:15:56,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-09-30 10:15:56,309 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-09-30 10:15:56,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:56,310 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-09-30 10:15:56,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 10:15:56,310 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-09-30 10:15:56,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-30 10:15:56,310 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:56,311 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1, 1] [2018-09-30 10:15:56,311 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:56,311 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:56,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1304822623, now seen corresponding path program 26 times [2018-09-30 10:15:56,311 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:56,311 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:56,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:56,312 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:15:56,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:56,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:57,113 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:57,113 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:57,114 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:15:57,121 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:15:57,134 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:15:57,134 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:15:57,137 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:57,147 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:57,168 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:15:57,168 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-30 10:15:57,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 10:15:57,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 10:15:57,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-30 10:15:57,169 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 29 states. [2018-09-30 10:15:57,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:57,334 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-30 10:15:57,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 10:15:57,334 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 29 [2018-09-30 10:15:57,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:57,335 INFO L225 Difference]: With dead ends: 33 [2018-09-30 10:15:57,335 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 10:15:57,336 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-30 10:15:57,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 10:15:57,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-30 10:15:57,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-30 10:15:57,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-30 10:15:57,339 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-09-30 10:15:57,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:57,340 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-30 10:15:57,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 10:15:57,340 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-30 10:15:57,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-30 10:15:57,340 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:57,340 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1, 1] [2018-09-30 10:15:57,341 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:57,341 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:57,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1794797624, now seen corresponding path program 27 times [2018-09-30 10:15:57,341 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:57,341 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:57,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:57,342 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:15:57,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:57,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:57,903 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:57,904 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:57,904 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:15:57,912 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:15:57,936 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-30 10:15:57,937 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:15:57,938 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:57,948 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:57,979 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:15:57,979 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-30 10:15:57,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 10:15:57,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 10:15:57,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-30 10:15:57,980 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 30 states. [2018-09-30 10:15:58,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:58,031 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-09-30 10:15:58,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-30 10:15:58,032 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 30 [2018-09-30 10:15:58,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:58,033 INFO L225 Difference]: With dead ends: 34 [2018-09-30 10:15:58,033 INFO L226 Difference]: Without dead ends: 32 [2018-09-30 10:15:58,033 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-30 10:15:58,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-30 10:15:58,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-30 10:15:58,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:15:58,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-09-30 10:15:58,036 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-09-30 10:15:58,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:58,037 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-09-30 10:15:58,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 10:15:58,037 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-09-30 10:15:58,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-30 10:15:58,037 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:58,038 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1, 1] [2018-09-30 10:15:58,038 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:58,038 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:58,038 INFO L82 PathProgramCache]: Analyzing trace with hash 195846529, now seen corresponding path program 28 times [2018-09-30 10:15:58,038 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:58,038 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:58,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:58,039 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:15:58,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:58,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:58,590 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:58,590 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:58,590 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:15:58,604 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:15:58,620 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:15:58,621 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:15:58,622 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:58,631 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:58,660 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:15:58,660 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-30 10:15:58,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-30 10:15:58,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-30 10:15:58,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-30 10:15:58,661 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 31 states. [2018-09-30 10:15:58,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:58,743 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-30 10:15:58,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 10:15:58,743 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 31 [2018-09-30 10:15:58,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:58,744 INFO L225 Difference]: With dead ends: 35 [2018-09-30 10:15:58,744 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 10:15:58,745 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-30 10:15:58,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 10:15:58,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-30 10:15:58,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-30 10:15:58,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-30 10:15:58,749 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-09-30 10:15:58,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:58,749 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-30 10:15:58,749 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-30 10:15:58,749 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-30 10:15:58,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-30 10:15:58,750 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:58,750 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1, 1] [2018-09-30 10:15:58,750 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:58,750 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:58,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1776273128, now seen corresponding path program 29 times [2018-09-30 10:15:58,751 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:58,751 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:58,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:58,751 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:15:58,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:58,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:15:59,163 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:59,164 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:15:59,164 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:15:59,171 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:15:59,188 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-30 10:15:59,189 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:15:59,191 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:15:59,202 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:15:59,232 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:15:59,232 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-30 10:15:59,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-30 10:15:59,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-30 10:15:59,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-30 10:15:59,233 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 32 states. [2018-09-30 10:15:59,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:15:59,488 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-09-30 10:15:59,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 10:15:59,488 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 32 [2018-09-30 10:15:59,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:15:59,489 INFO L225 Difference]: With dead ends: 36 [2018-09-30 10:15:59,489 INFO L226 Difference]: Without dead ends: 34 [2018-09-30 10:15:59,490 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-30 10:15:59,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-30 10:15:59,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-30 10:15:59,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:15:59,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-09-30 10:15:59,492 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-09-30 10:15:59,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:15:59,492 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-09-30 10:15:59,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-30 10:15:59,492 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-09-30 10:15:59,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-30 10:15:59,493 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:15:59,493 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1, 1] [2018-09-30 10:15:59,493 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:15:59,494 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:15:59,494 INFO L82 PathProgramCache]: Analyzing trace with hash -770109855, now seen corresponding path program 30 times [2018-09-30 10:15:59,494 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:15:59,494 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:15:59,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:59,495 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:15:59,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:15:59,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:00,308 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:00,309 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:16:00,309 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:16:00,318 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:16:00,341 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-30 10:16:00,342 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:16:00,345 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:16:00,357 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:00,386 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:16:00,387 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-30 10:16:00,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-30 10:16:00,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-30 10:16:00,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 10:16:00,388 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 33 states. [2018-09-30 10:16:00,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:16:00,500 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-30 10:16:00,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 10:16:00,500 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 33 [2018-09-30 10:16:00,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:16:00,501 INFO L225 Difference]: With dead ends: 37 [2018-09-30 10:16:00,501 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 10:16:00,502 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 10:16:00,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 10:16:00,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-30 10:16:00,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-30 10:16:00,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-30 10:16:00,505 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-09-30 10:16:00,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:16:00,505 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-30 10:16:00,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-30 10:16:00,506 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-30 10:16:00,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-30 10:16:00,506 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:16:00,506 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1, 1] [2018-09-30 10:16:00,506 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:16:00,507 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:16:00,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1896396296, now seen corresponding path program 31 times [2018-09-30 10:16:00,507 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:16:00,507 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:16:00,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:00,508 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:16:00,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:00,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:01,561 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:01,561 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:16:01,561 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:16:01,569 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:16:01,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:01,584 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:16:01,593 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:01,614 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:16:01,614 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-30 10:16:01,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 10:16:01,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 10:16:01,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 10:16:01,615 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 34 states. [2018-09-30 10:16:01,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:16:01,678 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-09-30 10:16:01,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 10:16:01,679 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 34 [2018-09-30 10:16:01,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:16:01,679 INFO L225 Difference]: With dead ends: 38 [2018-09-30 10:16:01,680 INFO L226 Difference]: Without dead ends: 36 [2018-09-30 10:16:01,681 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 10:16:01,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-30 10:16:01,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-30 10:16:01,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-30 10:16:01,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-09-30 10:16:01,684 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-09-30 10:16:01,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:16:01,684 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-09-30 10:16:01,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 10:16:01,684 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-09-30 10:16:01,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-30 10:16:01,685 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:16:01,685 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1, 1] [2018-09-30 10:16:01,685 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:16:01,685 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:16:01,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1341258943, now seen corresponding path program 32 times [2018-09-30 10:16:01,685 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:16:01,685 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:16:01,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:01,687 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:16:01,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:01,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:02,219 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:02,219 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:16:02,219 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:16:02,226 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:16:02,242 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:16:02,242 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:16:02,244 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:16:02,253 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:02,276 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:16:02,276 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-30 10:16:02,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-30 10:16:02,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-30 10:16:02,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 10:16:02,277 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 35 states. [2018-09-30 10:16:02,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:16:02,337 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-30 10:16:02,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 10:16:02,338 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 35 [2018-09-30 10:16:02,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:16:02,338 INFO L225 Difference]: With dead ends: 39 [2018-09-30 10:16:02,338 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 10:16:02,339 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 10:16:02,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 10:16:02,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-30 10:16:02,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-30 10:16:02,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-30 10:16:02,343 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-09-30 10:16:02,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:16:02,343 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-30 10:16:02,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-30 10:16:02,344 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-30 10:16:02,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-30 10:16:02,344 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:16:02,344 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1, 1] [2018-09-30 10:16:02,344 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:16:02,344 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:16:02,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1370643752, now seen corresponding path program 33 times [2018-09-30 10:16:02,345 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:16:02,345 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:16:02,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:02,346 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:16:02,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:02,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:02,828 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:02,828 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:16:02,828 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:16:02,835 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:16:02,858 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-30 10:16:02,858 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:16:02,859 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:16:02,868 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:02,899 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:16:02,899 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-30 10:16:02,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 10:16:02,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 10:16:02,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 10:16:02,900 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 36 states. [2018-09-30 10:16:02,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:16:02,995 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-09-30 10:16:02,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 10:16:02,996 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 36 [2018-09-30 10:16:02,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:16:02,996 INFO L225 Difference]: With dead ends: 40 [2018-09-30 10:16:02,996 INFO L226 Difference]: Without dead ends: 38 [2018-09-30 10:16:02,997 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 [2018-09-30 10:16:02,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-30 10:16:02,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-30 10:16:02,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-30 10:16:02,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-09-30 10:16:02,999 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-09-30 10:16:02,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:16:02,999 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-09-30 10:16:02,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 10:16:03,000 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-09-30 10:16:03,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-30 10:16:03,000 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:16:03,000 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1, 1] [2018-09-30 10:16:03,000 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:16:03,000 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:16:03,000 INFO L82 PathProgramCache]: Analyzing trace with hash -459718623, now seen corresponding path program 34 times [2018-09-30 10:16:03,001 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:16:03,001 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:16:03,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:03,001 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:16:03,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:03,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:03,653 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:03,654 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:16:03,654 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:16:03,662 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:16:03,678 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:16:03,678 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:16:03,680 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:16:03,687 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:03,708 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:16:03,708 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-30 10:16:03,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-30 10:16:03,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-30 10:16:03,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 10:16:03,709 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 37 states. [2018-09-30 10:16:03,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:16:03,767 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-30 10:16:03,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 10:16:03,768 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 37 [2018-09-30 10:16:03,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:16:03,769 INFO L225 Difference]: With dead ends: 41 [2018-09-30 10:16:03,769 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 10:16:03,770 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 10:16:03,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 10:16:03,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-30 10:16:03,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-30 10:16:03,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-30 10:16:03,772 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-09-30 10:16:03,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:16:03,773 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-30 10:16:03,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-30 10:16:03,773 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-30 10:16:03,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-30 10:16:03,773 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:16:03,774 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1, 1] [2018-09-30 10:16:03,774 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:16:03,774 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:16:03,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1366377400, now seen corresponding path program 35 times [2018-09-30 10:16:03,774 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:16:03,774 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:16:03,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:03,775 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:16:03,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:03,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:04,374 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:04,375 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:16:04,375 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:16:04,383 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:16:04,403 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-30 10:16:04,403 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:16:04,405 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:16:04,414 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:04,433 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:16:04,434 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-30 10:16:04,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 10:16:04,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 10:16:04,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 10:16:04,435 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 38 states. [2018-09-30 10:16:04,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:16:04,506 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-09-30 10:16:04,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-30 10:16:04,506 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 38 [2018-09-30 10:16:04,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:16:04,507 INFO L225 Difference]: With dead ends: 42 [2018-09-30 10:16:04,507 INFO L226 Difference]: Without dead ends: 40 [2018-09-30 10:16:04,508 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 10:16:04,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-30 10:16:04,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-30 10:16:04,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-30 10:16:04,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-09-30 10:16:04,511 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-09-30 10:16:04,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:16:04,511 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-09-30 10:16:04,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 10:16:04,511 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-09-30 10:16:04,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-30 10:16:04,511 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:16:04,512 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1, 1] [2018-09-30 10:16:04,512 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:16:04,512 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:16:04,512 INFO L82 PathProgramCache]: Analyzing trace with hash 591971585, now seen corresponding path program 36 times [2018-09-30 10:16:04,512 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:16:04,512 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:16:04,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:04,513 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:16:04,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:04,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:05,549 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:05,549 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:16:05,549 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:16:05,557 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:16:05,596 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-30 10:16:05,597 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:16:05,599 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:16:05,609 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:05,637 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:16:05,637 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-30 10:16:05,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-30 10:16:05,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-30 10:16:05,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 10:16:05,638 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 39 states. [2018-09-30 10:16:05,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:16:05,703 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-30 10:16:05,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 10:16:05,704 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 39 [2018-09-30 10:16:05,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:16:05,705 INFO L225 Difference]: With dead ends: 43 [2018-09-30 10:16:05,705 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 10:16:05,706 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 10:16:05,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 10:16:05,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-30 10:16:05,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-30 10:16:05,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-30 10:16:05,708 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-09-30 10:16:05,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:16:05,708 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-30 10:16:05,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-30 10:16:05,708 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-30 10:16:05,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-30 10:16:05,709 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:16:05,709 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1, 1] [2018-09-30 10:16:05,709 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:16:05,709 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:16:05,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1171247976, now seen corresponding path program 37 times [2018-09-30 10:16:05,710 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:16:05,710 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:16:05,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:05,710 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:16:05,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:05,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:06,350 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:06,350 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:16:06,350 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:16:06,358 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:16:06,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:06,375 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:16:06,386 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:06,404 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:16:06,405 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-30 10:16:06,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-30 10:16:06,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-30 10:16:06,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 10:16:06,406 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 40 states. [2018-09-30 10:16:06,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:16:06,466 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-09-30 10:16:06,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-30 10:16:06,467 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 40 [2018-09-30 10:16:06,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:16:06,467 INFO L225 Difference]: With dead ends: 44 [2018-09-30 10:16:06,467 INFO L226 Difference]: Without dead ends: 42 [2018-09-30 10:16:06,468 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 10:16:06,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-30 10:16:06,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-30 10:16:06,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-30 10:16:06,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-09-30 10:16:06,471 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-09-30 10:16:06,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:16:06,471 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-09-30 10:16:06,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-30 10:16:06,471 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-09-30 10:16:06,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-30 10:16:06,472 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:16:06,472 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1, 1] [2018-09-30 10:16:06,472 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:16:06,472 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:16:06,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1948946913, now seen corresponding path program 38 times [2018-09-30 10:16:06,472 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:16:06,473 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:16:06,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:06,473 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:16:06,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:06,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:07,114 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:07,115 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:16:07,115 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:16:07,123 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:16:07,142 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:16:07,142 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:16:07,143 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:16:07,154 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:07,183 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:16:07,183 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-30 10:16:07,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-30 10:16:07,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-30 10:16:07,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 10:16:07,184 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 41 states. [2018-09-30 10:16:07,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:16:07,266 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-30 10:16:07,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 10:16:07,266 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 41 [2018-09-30 10:16:07,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:16:07,267 INFO L225 Difference]: With dead ends: 45 [2018-09-30 10:16:07,267 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 10:16:07,268 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 [2018-09-30 10:16:07,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 10:16:07,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-30 10:16:07,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-30 10:16:07,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-30 10:16:07,271 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-09-30 10:16:07,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:16:07,271 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-30 10:16:07,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-30 10:16:07,271 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-30 10:16:07,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-30 10:16:07,271 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:16:07,271 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1, 1] [2018-09-30 10:16:07,271 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:16:07,272 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:16:07,272 INFO L82 PathProgramCache]: Analyzing trace with hash 287810184, now seen corresponding path program 39 times [2018-09-30 10:16:07,272 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:16:07,272 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:16:07,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:07,272 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:16:07,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:07,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:07,938 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:07,938 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:16:07,938 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:16:07,948 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:16:07,971 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-09-30 10:16:07,971 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:16:07,972 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:16:07,984 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:08,012 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:16:08,012 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-30 10:16:08,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-30 10:16:08,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-30 10:16:08,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 10:16:08,014 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 42 states. [2018-09-30 10:16:08,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:16:08,551 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-09-30 10:16:08,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-30 10:16:08,552 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 42 [2018-09-30 10:16:08,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:16:08,552 INFO L225 Difference]: With dead ends: 46 [2018-09-30 10:16:08,553 INFO L226 Difference]: Without dead ends: 44 [2018-09-30 10:16:08,554 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 10:16:08,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-30 10:16:08,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-30 10:16:08,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-30 10:16:08,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-09-30 10:16:08,556 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-09-30 10:16:08,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:16:08,556 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-09-30 10:16:08,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-30 10:16:08,556 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-09-30 10:16:08,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-30 10:16:08,556 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:16:08,556 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1, 1] [2018-09-30 10:16:08,557 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:16:08,557 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:16:08,557 INFO L82 PathProgramCache]: Analyzing trace with hash 332179137, now seen corresponding path program 40 times [2018-09-30 10:16:08,557 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:16:08,557 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:16:08,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:08,558 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:16:08,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:08,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:09,293 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:09,293 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:16:09,293 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:16:09,302 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:16:09,332 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:16:09,333 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:16:09,335 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:16:09,346 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:09,372 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:16:09,372 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-30 10:16:09,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-30 10:16:09,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-30 10:16:09,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 10:16:09,373 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 43 states. [2018-09-30 10:16:09,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:16:09,488 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-30 10:16:09,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 10:16:09,489 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 43 [2018-09-30 10:16:09,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:16:09,489 INFO L225 Difference]: With dead ends: 47 [2018-09-30 10:16:09,489 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 10:16:09,491 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 [2018-09-30 10:16:09,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 10:16:09,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-30 10:16:09,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-30 10:16:09,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-30 10:16:09,493 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-09-30 10:16:09,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:16:09,493 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-30 10:16:09,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-30 10:16:09,493 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-30 10:16:09,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-30 10:16:09,493 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:16:09,494 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1, 1] [2018-09-30 10:16:09,494 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:16:09,494 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:16:09,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1707616680, now seen corresponding path program 41 times [2018-09-30 10:16:09,494 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:16:09,494 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:16:09,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:09,495 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:16:09,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:09,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:10,888 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:10,888 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:16:10,888 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:16:10,895 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:16:10,920 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-30 10:16:10,920 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:16:10,922 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:16:10,934 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:10,954 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:16:10,954 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-30 10:16:10,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-30 10:16:10,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-30 10:16:10,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 10:16:10,955 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 44 states. [2018-09-30 10:16:11,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:16:11,020 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-09-30 10:16:11,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-30 10:16:11,021 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 44 [2018-09-30 10:16:11,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:16:11,021 INFO L225 Difference]: With dead ends: 48 [2018-09-30 10:16:11,021 INFO L226 Difference]: Without dead ends: 46 [2018-09-30 10:16:11,022 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 10:16:11,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-30 10:16:11,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-30 10:16:11,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-30 10:16:11,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-09-30 10:16:11,025 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-09-30 10:16:11,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:16:11,025 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-09-30 10:16:11,025 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-30 10:16:11,025 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-09-30 10:16:11,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-30 10:16:11,026 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:16:11,026 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1, 1] [2018-09-30 10:16:11,026 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:16:11,026 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:16:11,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1396507553, now seen corresponding path program 42 times [2018-09-30 10:16:11,026 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:16:11,027 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:16:11,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:11,027 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:16:11,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:11,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:11,916 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:11,917 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:16:11,917 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:16:11,924 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:16:11,950 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-09-30 10:16:11,950 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:16:11,952 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:16:11,963 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:11,983 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:16:11,983 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-30 10:16:11,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-30 10:16:11,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-30 10:16:11,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 10:16:11,985 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 45 states. [2018-09-30 10:16:12,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:16:12,059 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-30 10:16:12,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-30 10:16:12,059 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 45 [2018-09-30 10:16:12,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:16:12,060 INFO L225 Difference]: With dead ends: 49 [2018-09-30 10:16:12,060 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 10:16:12,061 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 [2018-09-30 10:16:12,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 10:16:12,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-30 10:16:12,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-30 10:16:12,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-30 10:16:12,064 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-09-30 10:16:12,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:16:12,064 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-30 10:16:12,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-30 10:16:12,065 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-30 10:16:12,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-30 10:16:12,065 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:16:12,065 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1, 1] [2018-09-30 10:16:12,066 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:16:12,066 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:16:12,066 INFO L82 PathProgramCache]: Analyzing trace with hash 342059208, now seen corresponding path program 43 times [2018-09-30 10:16:12,066 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:16:12,066 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:16:12,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:12,067 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:16:12,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:12,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:12,807 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:12,808 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:16:12,808 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:16:12,816 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:16:12,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:12,836 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:16:12,846 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:12,866 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:16:12,866 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-30 10:16:12,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-30 10:16:12,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-30 10:16:12,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 10:16:12,867 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 46 states. [2018-09-30 10:16:12,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:16:12,936 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-09-30 10:16:12,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-30 10:16:12,937 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 46 [2018-09-30 10:16:12,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:16:12,937 INFO L225 Difference]: With dead ends: 50 [2018-09-30 10:16:12,937 INFO L226 Difference]: Without dead ends: 48 [2018-09-30 10:16:12,938 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 10:16:12,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-30 10:16:12,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-09-30 10:16:12,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-30 10:16:12,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-09-30 10:16:12,940 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-09-30 10:16:12,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:16:12,941 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-09-30 10:16:12,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-30 10:16:12,941 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-09-30 10:16:12,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-30 10:16:12,941 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:16:12,941 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1, 1] [2018-09-30 10:16:12,942 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:16:12,942 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:16:12,942 INFO L82 PathProgramCache]: Analyzing trace with hash 2013898881, now seen corresponding path program 44 times [2018-09-30 10:16:12,942 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:16:12,942 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:16:12,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:12,943 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:16:12,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:12,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:13,749 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:13,750 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:16:13,750 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:16:13,760 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:16:13,779 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:16:13,779 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:16:13,780 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:16:13,790 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:13,809 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:16:13,809 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-30 10:16:13,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-30 10:16:13,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-30 10:16:13,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 10:16:13,810 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 47 states. [2018-09-30 10:16:13,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:16:13,938 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-30 10:16:13,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 10:16:13,939 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 47 [2018-09-30 10:16:13,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:16:13,940 INFO L225 Difference]: With dead ends: 51 [2018-09-30 10:16:13,940 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 10:16:13,940 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 10:16:13,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 10:16:13,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-30 10:16:13,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-30 10:16:13,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-30 10:16:13,945 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-09-30 10:16:13,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:16:13,946 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-30 10:16:13,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-30 10:16:13,946 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-30 10:16:13,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-30 10:16:13,946 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:16:13,947 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1, 1] [2018-09-30 10:16:13,947 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:16:13,947 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:16:13,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1993646104, now seen corresponding path program 45 times [2018-09-30 10:16:13,947 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:16:13,947 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:16:13,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:13,948 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:16:13,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:13,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:15,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:15,275 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:16:15,275 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:16:15,285 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:16:15,312 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-30 10:16:15,312 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:16:15,314 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:16:15,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:15,355 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:16:15,356 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-30 10:16:15,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-30 10:16:15,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-30 10:16:15,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 10:16:15,357 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 48 states. [2018-09-30 10:16:15,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:16:15,776 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-09-30 10:16:15,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-30 10:16:15,777 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 48 [2018-09-30 10:16:15,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:16:15,778 INFO L225 Difference]: With dead ends: 52 [2018-09-30 10:16:15,778 INFO L226 Difference]: Without dead ends: 50 [2018-09-30 10:16:15,779 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 [2018-09-30 10:16:15,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-30 10:16:15,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-30 10:16:15,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-30 10:16:15,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-09-30 10:16:15,782 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-09-30 10:16:15,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:16:15,782 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-09-30 10:16:15,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-30 10:16:15,782 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-09-30 10:16:15,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-30 10:16:15,783 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:16:15,783 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1, 1] [2018-09-30 10:16:15,783 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:16:15,783 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:16:15,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1673489055, now seen corresponding path program 46 times [2018-09-30 10:16:15,783 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:16:15,784 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:16:15,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:15,784 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:16:15,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:15,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:16,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:16,657 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:16:16,657 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:16:16,665 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:16:16,686 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:16:16,686 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:16:16,688 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:16:16,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:16,728 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:16:16,728 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-30 10:16:16,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-30 10:16:16,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-30 10:16:16,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 10:16:16,729 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 49 states. [2018-09-30 10:16:16,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:16:16,802 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-30 10:16:16,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 10:16:16,804 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 49 [2018-09-30 10:16:16,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:16:16,804 INFO L225 Difference]: With dead ends: 53 [2018-09-30 10:16:16,805 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 10:16:16,805 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 10:16:16,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 10:16:16,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-30 10:16:16,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-30 10:16:16,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-30 10:16:16,807 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-09-30 10:16:16,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:16:16,807 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-30 10:16:16,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-30 10:16:16,807 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-30 10:16:16,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-30 10:16:16,807 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:16:16,808 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1, 1] [2018-09-30 10:16:16,808 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:16:16,808 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:16:16,808 INFO L82 PathProgramCache]: Analyzing trace with hash -338555128, now seen corresponding path program 47 times [2018-09-30 10:16:16,808 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:16:16,808 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:16:16,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:16,809 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:16:16,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:16,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:18,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:18,012 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:16:18,012 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:16:18,019 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:16:18,048 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-30 10:16:18,048 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:16:18,050 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:16:18,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:18,091 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:16:18,091 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-30 10:16:18,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-30 10:16:18,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-30 10:16:18,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 10:16:18,092 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 50 states. [2018-09-30 10:16:18,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:16:18,186 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-09-30 10:16:18,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-30 10:16:18,186 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 50 [2018-09-30 10:16:18,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:16:18,187 INFO L225 Difference]: With dead ends: 54 [2018-09-30 10:16:18,187 INFO L226 Difference]: Without dead ends: 52 [2018-09-30 10:16:18,188 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 10:16:18,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-30 10:16:18,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-30 10:16:18,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-30 10:16:18,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-09-30 10:16:18,190 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-09-30 10:16:18,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:16:18,191 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-09-30 10:16:18,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-30 10:16:18,191 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-09-30 10:16:18,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-30 10:16:18,191 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:16:18,191 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1, 1] [2018-09-30 10:16:18,192 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:16:18,192 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:16:18,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1905276351, now seen corresponding path program 48 times [2018-09-30 10:16:18,192 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:16:18,192 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:16:18,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:18,193 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:16:18,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:18,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:19,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:19,203 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:16:19,203 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:16:19,210 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:16:19,246 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-30 10:16:19,246 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:16:19,248 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:16:19,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:19,278 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:16:19,278 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-30 10:16:19,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-30 10:16:19,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-30 10:16:19,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 10:16:19,279 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 51 states. [2018-09-30 10:16:19,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:16:19,370 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-30 10:16:19,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 10:16:19,371 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 51 [2018-09-30 10:16:19,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:16:19,372 INFO L225 Difference]: With dead ends: 55 [2018-09-30 10:16:19,372 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 10:16:19,373 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 10:16:19,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 10:16:19,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-30 10:16:19,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-30 10:16:19,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-30 10:16:19,375 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-09-30 10:16:19,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:16:19,375 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-30 10:16:19,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-30 10:16:19,376 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-30 10:16:19,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-30 10:16:19,376 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:16:19,376 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1, 1] [2018-09-30 10:16:19,376 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:16:19,377 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:16:19,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1065973288, now seen corresponding path program 49 times [2018-09-30 10:16:19,377 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:16:19,377 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:16:19,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:19,378 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:16:19,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:19,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:20,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:20,764 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:16:20,764 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:16:20,776 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:16:20,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:20,798 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:16:20,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:20,834 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:16:20,834 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-30 10:16:20,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-30 10:16:20,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-30 10:16:20,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 10:16:20,835 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 52 states. [2018-09-30 10:16:20,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:16:20,918 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-09-30 10:16:20,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-30 10:16:20,919 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 52 [2018-09-30 10:16:20,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:16:20,919 INFO L225 Difference]: With dead ends: 56 [2018-09-30 10:16:20,919 INFO L226 Difference]: Without dead ends: 54 [2018-09-30 10:16:20,920 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 10:16:20,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-30 10:16:20,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-09-30 10:16:20,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-30 10:16:20,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-09-30 10:16:20,922 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-09-30 10:16:20,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:16:20,922 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-09-30 10:16:20,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-30 10:16:20,922 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-09-30 10:16:20,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-30 10:16:20,923 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:16:20,923 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1, 1] [2018-09-30 10:16:20,923 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:16:20,923 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:16:20,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1314568415, now seen corresponding path program 50 times [2018-09-30 10:16:20,924 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:16:20,924 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:16:20,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:20,924 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:16:20,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:20,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:21,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:21,978 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:16:21,978 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:16:21,987 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:16:22,008 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:16:22,008 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:16:22,010 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:16:22,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:22,052 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:16:22,053 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-30 10:16:22,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-30 10:16:22,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-30 10:16:22,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 10:16:22,054 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 53 states. [2018-09-30 10:16:22,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:16:22,152 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-30 10:16:22,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-30 10:16:22,153 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 53 [2018-09-30 10:16:22,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:16:22,154 INFO L225 Difference]: With dead ends: 57 [2018-09-30 10:16:22,154 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 10:16:22,154 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 10:16:22,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 10:16:22,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-30 10:16:22,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-30 10:16:22,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-30 10:16:22,156 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-09-30 10:16:22,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:16:22,156 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-30 10:16:22,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-30 10:16:22,157 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-30 10:16:22,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-30 10:16:22,157 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:16:22,157 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1, 1] [2018-09-30 10:16:22,157 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:16:22,158 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:16:22,158 INFO L82 PathProgramCache]: Analyzing trace with hash -2096917176, now seen corresponding path program 51 times [2018-09-30 10:16:22,158 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:16:22,158 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:16:22,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:22,159 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:16:22,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:22,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:23,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:23,213 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:16:23,213 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:16:23,220 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:16:23,250 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-09-30 10:16:23,250 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:16:23,252 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:16:23,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:23,294 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:16:23,295 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-30 10:16:23,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-30 10:16:23,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-30 10:16:23,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 10:16:23,296 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 54 states. [2018-09-30 10:16:23,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:16:23,472 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-09-30 10:16:23,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-30 10:16:23,472 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 54 [2018-09-30 10:16:23,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:16:23,473 INFO L225 Difference]: With dead ends: 58 [2018-09-30 10:16:23,473 INFO L226 Difference]: Without dead ends: 56 [2018-09-30 10:16:23,474 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 10:16:23,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-30 10:16:23,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-30 10:16:23,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-30 10:16:23,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-09-30 10:16:23,476 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-09-30 10:16:23,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:16:23,476 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-09-30 10:16:23,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-30 10:16:23,477 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-09-30 10:16:23,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-30 10:16:23,477 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:16:23,477 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1, 1] [2018-09-30 10:16:23,477 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:16:23,478 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:16:23,478 INFO L82 PathProgramCache]: Analyzing trace with hash -579924991, now seen corresponding path program 52 times [2018-09-30 10:16:23,478 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:16:23,478 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:16:23,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:23,479 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:16:23,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:23,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:24,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:24,663 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:16:24,663 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:16:24,670 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:16:24,693 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:16:24,693 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:16:24,695 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:16:24,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:24,732 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:16:24,732 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-30 10:16:24,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-30 10:16:24,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-30 10:16:24,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 10:16:24,733 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 55 states. [2018-09-30 10:16:24,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:16:24,849 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-30 10:16:24,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 10:16:24,850 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 55 [2018-09-30 10:16:24,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:16:24,850 INFO L225 Difference]: With dead ends: 59 [2018-09-30 10:16:24,850 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 10:16:24,851 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 10:16:24,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 10:16:24,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-30 10:16:24,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-30 10:16:24,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-09-30 10:16:24,854 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-09-30 10:16:24,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:16:24,854 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-09-30 10:16:24,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-30 10:16:24,854 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-09-30 10:16:24,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-30 10:16:24,855 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:16:24,855 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1, 1] [2018-09-30 10:16:24,855 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:16:24,855 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:16:24,855 INFO L82 PathProgramCache]: Analyzing trace with hash -797807512, now seen corresponding path program 53 times [2018-09-30 10:16:24,856 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:16:24,856 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:16:24,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:24,856 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:16:24,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:24,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:26,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:26,248 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:16:26,248 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:16:26,255 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:16:26,286 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-09-30 10:16:26,287 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:16:26,288 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:16:26,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:26,321 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:16:26,322 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-30 10:16:26,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-30 10:16:26,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-30 10:16:26,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 10:16:26,323 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 56 states. [2018-09-30 10:16:26,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:16:26,393 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-09-30 10:16:26,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-30 10:16:26,394 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 56 [2018-09-30 10:16:26,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:16:26,395 INFO L225 Difference]: With dead ends: 60 [2018-09-30 10:16:26,395 INFO L226 Difference]: Without dead ends: 58 [2018-09-30 10:16:26,396 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 10:16:26,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-30 10:16:26,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-30 10:16:26,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-30 10:16:26,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-09-30 10:16:26,398 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-09-30 10:16:26,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:16:26,398 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-09-30 10:16:26,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-30 10:16:26,399 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-09-30 10:16:26,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-30 10:16:26,399 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:16:26,399 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1, 1] [2018-09-30 10:16:26,399 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:16:26,399 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:16:26,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1037768929, now seen corresponding path program 54 times [2018-09-30 10:16:26,399 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:16:26,400 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:16:26,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:26,400 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:16:26,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:26,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:27,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:27,660 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:16:27,660 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:16:27,667 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:16:27,698 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-09-30 10:16:27,698 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:16:27,700 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:16:27,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:27,742 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:16:27,742 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-30 10:16:27,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-30 10:16:27,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-30 10:16:27,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-30 10:16:27,744 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 57 states. [2018-09-30 10:16:27,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:16:27,889 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-30 10:16:27,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-30 10:16:27,889 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 57 [2018-09-30 10:16:27,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:16:27,890 INFO L225 Difference]: With dead ends: 61 [2018-09-30 10:16:27,890 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 10:16:27,890 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 [2018-09-30 10:16:27,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 10:16:27,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-30 10:16:27,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-30 10:16:27,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-30 10:16:27,892 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-09-30 10:16:27,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:16:27,893 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-30 10:16:27,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-30 10:16:27,893 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-30 10:16:27,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-30 10:16:27,893 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:16:27,894 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1, 1] [2018-09-30 10:16:27,894 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:16:27,894 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:16:27,894 INFO L82 PathProgramCache]: Analyzing trace with hash 2106063752, now seen corresponding path program 55 times [2018-09-30 10:16:27,894 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:16:27,894 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:16:27,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:27,895 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:16:27,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:27,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:29,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:29,259 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:16:29,259 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:16:29,266 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:16:29,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:29,291 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:16:29,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:29,321 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:16:29,321 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-30 10:16:29,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-30 10:16:29,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-30 10:16:29,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 10:16:29,323 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 58 states. [2018-09-30 10:16:29,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:16:29,417 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-09-30 10:16:29,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-30 10:16:29,417 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 58 [2018-09-30 10:16:29,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:16:29,418 INFO L225 Difference]: With dead ends: 62 [2018-09-30 10:16:29,418 INFO L226 Difference]: Without dead ends: 60 [2018-09-30 10:16:29,418 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 10:16:29,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-09-30 10:16:29,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-09-30 10:16:29,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-30 10:16:29,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-09-30 10:16:29,422 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-09-30 10:16:29,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:16:29,422 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-09-30 10:16:29,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-30 10:16:29,422 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-09-30 10:16:29,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-30 10:16:29,423 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:16:29,423 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1, 1] [2018-09-30 10:16:29,423 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:16:29,423 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:16:29,423 INFO L82 PathProgramCache]: Analyzing trace with hash 863464897, now seen corresponding path program 56 times [2018-09-30 10:16:29,423 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:16:29,423 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:16:29,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:29,424 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:16:29,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:29,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:31,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:31,089 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:16:31,089 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:16:31,096 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:16:31,121 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:16:31,122 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:16:31,124 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:16:31,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:31,167 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:16:31,167 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-30 10:16:31,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-30 10:16:31,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-30 10:16:31,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 10:16:31,169 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 59 states. [2018-09-30 10:16:31,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:16:31,434 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-30 10:16:31,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-30 10:16:31,434 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 59 [2018-09-30 10:16:31,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:16:31,435 INFO L225 Difference]: With dead ends: 63 [2018-09-30 10:16:31,435 INFO L226 Difference]: Without dead ends: 61 [2018-09-30 10:16:31,436 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 10:16:31,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-30 10:16:31,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-30 10:16:31,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-30 10:16:31,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-09-30 10:16:31,439 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-09-30 10:16:31,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:16:31,439 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-09-30 10:16:31,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-30 10:16:31,439 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-09-30 10:16:31,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-30 10:16:31,440 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:16:31,440 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1, 1] [2018-09-30 10:16:31,440 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:16:31,440 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:16:31,440 INFO L82 PathProgramCache]: Analyzing trace with hash 997606056, now seen corresponding path program 57 times [2018-09-30 10:16:31,440 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:16:31,441 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:16:31,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:31,441 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:16:31,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:31,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:32,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:32,838 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:16:32,838 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:16:32,845 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:16:32,885 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-09-30 10:16:32,886 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:16:32,888 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:16:32,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:32,928 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:16:32,929 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-30 10:16:32,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-30 10:16:32,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-30 10:16:32,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 10:16:32,930 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 60 states. [2018-09-30 10:16:33,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:16:33,045 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-09-30 10:16:33,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-30 10:16:33,045 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 60 [2018-09-30 10:16:33,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:16:33,046 INFO L225 Difference]: With dead ends: 64 [2018-09-30 10:16:33,046 INFO L226 Difference]: Without dead ends: 62 [2018-09-30 10:16:33,046 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 10:16:33,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-09-30 10:16:33,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-09-30 10:16:33,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-09-30 10:16:33,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-09-30 10:16:33,048 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-09-30 10:16:33,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:16:33,048 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-09-30 10:16:33,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-30 10:16:33,048 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-09-30 10:16:33,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-09-30 10:16:33,049 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:16:33,049 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1, 1] [2018-09-30 10:16:33,049 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:16:33,049 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:16:33,049 INFO L82 PathProgramCache]: Analyzing trace with hash 861014689, now seen corresponding path program 58 times [2018-09-30 10:16:33,049 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:16:33,049 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:16:33,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:33,050 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:16:33,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:33,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:34,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:34,729 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:16:34,730 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:16:34,741 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:16:34,765 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:16:34,765 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:16:34,767 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:16:34,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:34,799 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:16:34,799 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-30 10:16:34,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-30 10:16:34,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-30 10:16:34,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-30 10:16:34,800 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 61 states. [2018-09-30 10:16:34,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:16:34,902 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-30 10:16:34,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-30 10:16:34,903 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 61 [2018-09-30 10:16:34,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:16:34,904 INFO L225 Difference]: With dead ends: 65 [2018-09-30 10:16:34,904 INFO L226 Difference]: Without dead ends: 63 [2018-09-30 10:16:34,904 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-30 10:16:34,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-30 10:16:34,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-30 10:16:34,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-30 10:16:34,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-09-30 10:16:34,907 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-09-30 10:16:34,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:16:34,907 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-09-30 10:16:34,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-30 10:16:34,907 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-09-30 10:16:34,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-30 10:16:34,908 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:16:34,908 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1, 1] [2018-09-30 10:16:34,908 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:16:34,908 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:16:34,908 INFO L82 PathProgramCache]: Analyzing trace with hash 921649608, now seen corresponding path program 59 times [2018-09-30 10:16:34,908 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:16:34,909 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:16:34,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:34,909 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:16:34,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:34,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:36,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:36,839 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:16:36,839 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:16:36,846 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:16:36,882 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-09-30 10:16:36,882 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:16:36,884 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:16:36,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:36,927 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:16:36,927 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-30 10:16:36,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-30 10:16:36,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-30 10:16:36,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 10:16:36,928 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 62 states. [2018-09-30 10:16:37,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:16:37,056 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-09-30 10:16:37,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-30 10:16:37,056 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 62 [2018-09-30 10:16:37,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:16:37,057 INFO L225 Difference]: With dead ends: 66 [2018-09-30 10:16:37,057 INFO L226 Difference]: Without dead ends: 64 [2018-09-30 10:16:37,058 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 [2018-09-30 10:16:37,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-30 10:16:37,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-09-30 10:16:37,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-30 10:16:37,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-09-30 10:16:37,060 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-09-30 10:16:37,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:16:37,060 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-09-30 10:16:37,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-30 10:16:37,061 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-09-30 10:16:37,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-30 10:16:37,061 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:16:37,061 INFO L375 BasicCegarLoop]: trace histogram [60, 1, 1, 1] [2018-09-30 10:16:37,061 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:16:37,062 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:16:37,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1493635199, now seen corresponding path program 60 times [2018-09-30 10:16:37,062 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:16:37,062 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:16:37,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:37,063 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:16:37,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:37,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:38,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:38,680 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:16:38,680 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:16:38,688 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:16:38,726 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-30 10:16:38,726 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:16:38,728 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:16:38,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:38,772 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:16:38,773 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-09-30 10:16:38,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-30 10:16:38,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-30 10:16:38,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-30 10:16:38,774 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 63 states. [2018-09-30 10:16:38,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:16:38,871 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-30 10:16:38,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-30 10:16:38,871 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 63 [2018-09-30 10:16:38,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:16:38,872 INFO L225 Difference]: With dead ends: 67 [2018-09-30 10:16:38,872 INFO L226 Difference]: Without dead ends: 65 [2018-09-30 10:16:38,873 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-30 10:16:38,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-30 10:16:38,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-30 10:16:38,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-30 10:16:38,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-09-30 10:16:38,875 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-09-30 10:16:38,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:16:38,876 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-09-30 10:16:38,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-30 10:16:38,876 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-09-30 10:16:38,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-30 10:16:38,876 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:16:38,877 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1, 1] [2018-09-30 10:16:38,877 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:16:38,877 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:16:38,877 INFO L82 PathProgramCache]: Analyzing trace with hash 941947112, now seen corresponding path program 61 times [2018-09-30 10:16:38,877 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:16:38,877 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:16:38,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:38,878 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:16:38,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:38,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:40,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:40,503 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:16:40,503 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:16:40,510 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:16:40,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:40,537 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:16:40,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:40,571 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:16:40,571 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-30 10:16:40,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-30 10:16:40,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-30 10:16:40,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 10:16:40,572 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 64 states. [2018-09-30 10:16:40,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:16:40,751 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-09-30 10:16:40,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-30 10:16:40,751 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 64 [2018-09-30 10:16:40,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:16:40,752 INFO L225 Difference]: With dead ends: 68 [2018-09-30 10:16:40,752 INFO L226 Difference]: Without dead ends: 66 [2018-09-30 10:16:40,752 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 [2018-09-30 10:16:40,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-30 10:16:40,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-09-30 10:16:40,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-30 10:16:40,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-09-30 10:16:40,754 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-09-30 10:16:40,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:16:40,755 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-09-30 10:16:40,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-30 10:16:40,755 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-09-30 10:16:40,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-30 10:16:40,755 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:16:40,755 INFO L375 BasicCegarLoop]: trace histogram [62, 1, 1, 1] [2018-09-30 10:16:40,756 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:16:40,756 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:16:40,756 INFO L82 PathProgramCache]: Analyzing trace with hash -864412575, now seen corresponding path program 62 times [2018-09-30 10:16:40,756 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:16:40,756 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:16:40,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:40,757 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:16:40,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:40,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:42,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:42,207 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:16:42,207 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:16:42,215 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:16:42,244 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:16:42,244 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:16:42,246 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:16:42,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:42,287 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:16:42,288 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-30 10:16:42,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-30 10:16:42,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-30 10:16:42,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 10:16:42,289 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 65 states. [2018-09-30 10:16:42,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:16:42,436 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-30 10:16:42,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-30 10:16:42,436 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 65 [2018-09-30 10:16:42,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:16:42,437 INFO L225 Difference]: With dead ends: 69 [2018-09-30 10:16:42,437 INFO L226 Difference]: Without dead ends: 67 [2018-09-30 10:16:42,438 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 10:16:42,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-30 10:16:42,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-30 10:16:42,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-30 10:16:42,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-09-30 10:16:42,441 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-09-30 10:16:42,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:16:42,441 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-09-30 10:16:42,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-30 10:16:42,441 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-09-30 10:16:42,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-30 10:16:42,442 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:16:42,442 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1, 1] [2018-09-30 10:16:42,442 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:16:42,442 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:16:42,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1026988024, now seen corresponding path program 63 times [2018-09-30 10:16:42,442 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:16:42,442 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:16:42,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:42,443 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:16:42,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:42,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:43,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:43,920 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:16:43,920 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:16:43,934 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:16:43,983 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-09-30 10:16:43,983 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:16:43,986 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:16:44,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:44,020 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:16:44,020 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-30 10:16:44,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-30 10:16:44,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-30 10:16:44,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 10:16:44,022 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 66 states. [2018-09-30 10:16:44,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:16:44,134 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-09-30 10:16:44,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-30 10:16:44,141 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 66 [2018-09-30 10:16:44,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:16:44,141 INFO L225 Difference]: With dead ends: 70 [2018-09-30 10:16:44,141 INFO L226 Difference]: Without dead ends: 68 [2018-09-30 10:16:44,142 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 10:16:44,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-30 10:16:44,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-09-30 10:16:44,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-30 10:16:44,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-09-30 10:16:44,144 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-09-30 10:16:44,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:16:44,145 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-09-30 10:16:44,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-30 10:16:44,145 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-09-30 10:16:44,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-09-30 10:16:44,145 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:16:44,146 INFO L375 BasicCegarLoop]: trace histogram [64, 1, 1, 1] [2018-09-30 10:16:44,146 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:16:44,146 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:16:44,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1771859647, now seen corresponding path program 64 times [2018-09-30 10:16:44,146 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:16:44,146 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:16:44,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:44,147 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:16:44,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:44,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:46,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:46,144 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:16:46,144 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:16:46,153 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:16:46,181 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:16:46,181 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:16:46,184 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:16:46,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:46,225 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:16:46,226 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-30 10:16:46,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-30 10:16:46,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-30 10:16:46,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-30 10:16:46,227 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 67 states. [2018-09-30 10:16:46,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:16:46,385 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-30 10:16:46,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-30 10:16:46,386 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 67 [2018-09-30 10:16:46,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:16:46,387 INFO L225 Difference]: With dead ends: 71 [2018-09-30 10:16:46,387 INFO L226 Difference]: Without dead ends: 69 [2018-09-30 10:16:46,387 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-30 10:16:46,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-30 10:16:46,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-30 10:16:46,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-30 10:16:46,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-09-30 10:16:46,390 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-09-30 10:16:46,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:16:46,391 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-09-30 10:16:46,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-30 10:16:46,391 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-09-30 10:16:46,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-30 10:16:46,391 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:16:46,391 INFO L375 BasicCegarLoop]: trace histogram [65, 1, 1, 1] [2018-09-30 10:16:46,392 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:16:46,392 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:16:46,392 INFO L82 PathProgramCache]: Analyzing trace with hash 906923816, now seen corresponding path program 65 times [2018-09-30 10:16:46,392 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:16:46,392 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:16:46,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:46,392 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:16:46,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:46,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:47,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:47,979 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:16:47,979 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:16:47,988 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:16:48,028 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-09-30 10:16:48,028 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:16:48,031 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:16:48,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:48,076 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:16:48,076 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-30 10:16:48,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-30 10:16:48,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-30 10:16:48,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 10:16:48,078 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 68 states. [2018-09-30 10:16:48,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:16:48,411 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-09-30 10:16:48,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-30 10:16:48,411 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 68 [2018-09-30 10:16:48,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:16:48,412 INFO L225 Difference]: With dead ends: 72 [2018-09-30 10:16:48,412 INFO L226 Difference]: Without dead ends: 70 [2018-09-30 10:16:48,412 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 10:16:48,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-30 10:16:48,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-09-30 10:16:48,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-30 10:16:48,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-09-30 10:16:48,415 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-09-30 10:16:48,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:16:48,415 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-09-30 10:16:48,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-30 10:16:48,415 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-09-30 10:16:48,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-09-30 10:16:48,415 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:16:48,416 INFO L375 BasicCegarLoop]: trace histogram [66, 1, 1, 1] [2018-09-30 10:16:48,416 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:16:48,416 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:16:48,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1950134751, now seen corresponding path program 66 times [2018-09-30 10:16:48,416 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:16:48,416 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:16:48,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:48,417 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:16:48,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:48,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:50,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:50,092 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:16:50,092 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:16:50,101 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:16:50,142 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-09-30 10:16:50,142 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:16:50,145 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:16:50,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:50,185 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:16:50,185 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-09-30 10:16:50,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-30 10:16:50,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-30 10:16:50,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-30 10:16:50,186 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 69 states. [2018-09-30 10:16:50,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:16:50,274 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-30 10:16:50,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-30 10:16:50,274 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 69 [2018-09-30 10:16:50,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:16:50,275 INFO L225 Difference]: With dead ends: 73 [2018-09-30 10:16:50,275 INFO L226 Difference]: Without dead ends: 71 [2018-09-30 10:16:50,276 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 [2018-09-30 10:16:50,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-30 10:16:50,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-30 10:16:50,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-30 10:16:50,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-09-30 10:16:50,278 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-09-30 10:16:50,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:16:50,279 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-09-30 10:16:50,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-30 10:16:50,279 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-09-30 10:16:50,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-30 10:16:50,280 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:16:50,280 INFO L375 BasicCegarLoop]: trace histogram [67, 1, 1, 1] [2018-09-30 10:16:50,280 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:16:50,280 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:16:50,280 INFO L82 PathProgramCache]: Analyzing trace with hash -324637112, now seen corresponding path program 67 times [2018-09-30 10:16:50,280 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:16:50,280 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:16:50,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:50,281 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:16:50,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:50,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:52,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:52,131 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:16:52,131 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:16:52,138 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:16:52,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:52,169 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:16:52,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:52,201 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:16:52,201 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-30 10:16:52,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-30 10:16:52,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-30 10:16:52,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 10:16:52,202 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 70 states. [2018-09-30 10:16:52,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:16:52,322 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-09-30 10:16:52,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-30 10:16:52,322 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 70 [2018-09-30 10:16:52,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:16:52,323 INFO L225 Difference]: With dead ends: 74 [2018-09-30 10:16:52,323 INFO L226 Difference]: Without dead ends: 72 [2018-09-30 10:16:52,324 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 10:16:52,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-09-30 10:16:52,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-09-30 10:16:52,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-09-30 10:16:52,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-09-30 10:16:52,327 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-09-30 10:16:52,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:16:52,327 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-09-30 10:16:52,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-30 10:16:52,327 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-09-30 10:16:52,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-09-30 10:16:52,327 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:16:52,327 INFO L375 BasicCegarLoop]: trace histogram [68, 1, 1, 1] [2018-09-30 10:16:52,327 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:16:52,328 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:16:52,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1473817855, now seen corresponding path program 68 times [2018-09-30 10:16:52,328 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:16:52,328 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:16:52,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:52,328 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:16:52,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:52,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:54,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:54,039 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:16:54,039 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:16:54,046 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:16:54,075 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:16:54,075 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:16:54,077 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:16:54,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:54,108 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:16:54,109 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-30 10:16:54,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-30 10:16:54,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-30 10:16:54,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 10:16:54,110 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 71 states. [2018-09-30 10:16:54,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:16:54,308 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-09-30 10:16:54,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-30 10:16:54,309 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 71 [2018-09-30 10:16:54,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:16:54,310 INFO L225 Difference]: With dead ends: 75 [2018-09-30 10:16:54,310 INFO L226 Difference]: Without dead ends: 73 [2018-09-30 10:16:54,310 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 [2018-09-30 10:16:54,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-30 10:16:54,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-30 10:16:54,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-30 10:16:54,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-09-30 10:16:54,314 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2018-09-30 10:16:54,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:16:54,314 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-09-30 10:16:54,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-30 10:16:54,314 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-09-30 10:16:54,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-30 10:16:54,315 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:16:54,315 INFO L375 BasicCegarLoop]: trace histogram [69, 1, 1, 1] [2018-09-30 10:16:54,315 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:16:54,316 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:16:54,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1556284776, now seen corresponding path program 69 times [2018-09-30 10:16:54,316 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:16:54,316 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:16:54,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:54,317 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:16:54,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:54,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:56,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:56,415 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:16:56,415 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:16:56,422 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:16:56,534 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-09-30 10:16:56,535 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:16:56,537 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:16:56,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:56,583 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:16:56,584 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-30 10:16:56,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-30 10:16:56,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-30 10:16:56,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-30 10:16:56,585 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 72 states. [2018-09-30 10:16:56,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:16:56,873 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-09-30 10:16:56,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-30 10:16:56,874 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 72 [2018-09-30 10:16:56,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:16:56,874 INFO L225 Difference]: With dead ends: 76 [2018-09-30 10:16:56,875 INFO L226 Difference]: Without dead ends: 74 [2018-09-30 10:16:56,875 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-30 10:16:56,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-30 10:16:56,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-09-30 10:16:56,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-30 10:16:56,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-09-30 10:16:56,878 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2018-09-30 10:16:56,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:16:56,879 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-09-30 10:16:56,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-30 10:16:56,879 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-09-30 10:16:56,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-09-30 10:16:56,879 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:16:56,879 INFO L375 BasicCegarLoop]: trace histogram [70, 1, 1, 1] [2018-09-30 10:16:56,880 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:16:56,880 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:16:56,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1000185825, now seen corresponding path program 70 times [2018-09-30 10:16:56,880 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:16:56,880 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:16:56,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:56,881 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:16:56,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:56,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:16:59,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:59,074 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:16:59,074 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:16:59,084 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:16:59,135 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:16:59,136 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:16:59,138 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:16:59,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:16:59,189 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:16:59,189 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-09-30 10:16:59,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-30 10:16:59,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-30 10:16:59,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-30 10:16:59,191 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 73 states. [2018-09-30 10:16:59,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:16:59,371 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-30 10:16:59,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-30 10:16:59,372 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 73 [2018-09-30 10:16:59,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:16:59,373 INFO L225 Difference]: With dead ends: 77 [2018-09-30 10:16:59,373 INFO L226 Difference]: Without dead ends: 75 [2018-09-30 10:16:59,374 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-30 10:16:59,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-30 10:16:59,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-30 10:16:59,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-30 10:16:59,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-09-30 10:16:59,377 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2018-09-30 10:16:59,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:16:59,377 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-09-30 10:16:59,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-30 10:16:59,377 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-09-30 10:16:59,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-30 10:16:59,378 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:16:59,378 INFO L375 BasicCegarLoop]: trace histogram [71, 1, 1, 1] [2018-09-30 10:16:59,378 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:16:59,378 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:16:59,378 INFO L82 PathProgramCache]: Analyzing trace with hash 940987528, now seen corresponding path program 71 times [2018-09-30 10:16:59,379 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:16:59,379 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:16:59,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:59,379 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:16:59,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:16:59,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:17:01,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:17:01,602 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:17:01,602 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:17:01,609 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:17:01,652 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-09-30 10:17:01,652 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:17:01,655 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:17:01,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:17:01,700 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:17:01,700 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-30 10:17:01,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-30 10:17:01,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-30 10:17:01,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 10:17:01,701 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 74 states. [2018-09-30 10:17:01,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:17:01,829 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-09-30 10:17:01,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-30 10:17:01,830 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 74 [2018-09-30 10:17:01,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:17:01,831 INFO L225 Difference]: With dead ends: 78 [2018-09-30 10:17:01,831 INFO L226 Difference]: Without dead ends: 76 [2018-09-30 10:17:01,832 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 10:17:01,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-09-30 10:17:01,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-09-30 10:17:01,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-30 10:17:01,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-09-30 10:17:01,835 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2018-09-30 10:17:01,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:17:01,835 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-09-30 10:17:01,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-30 10:17:01,835 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-09-30 10:17:01,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-09-30 10:17:01,836 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:17:01,836 INFO L375 BasicCegarLoop]: trace histogram [72, 1, 1, 1] [2018-09-30 10:17:01,836 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:17:01,836 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:17:01,836 INFO L82 PathProgramCache]: Analyzing trace with hash -894159679, now seen corresponding path program 72 times [2018-09-30 10:17:01,836 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:17:01,837 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:17:01,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:17:01,837 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:17:01,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:17:01,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:17:03,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:17:03,924 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:17:03,924 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:17:03,931 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:17:04,140 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-30 10:17:04,140 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:17:04,143 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:17:04,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:17:04,185 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:17:04,185 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-09-30 10:17:04,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-30 10:17:04,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-30 10:17:04,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-30 10:17:04,187 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 75 states. [2018-09-30 10:17:04,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:17:04,296 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-09-30 10:17:04,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-30 10:17:04,297 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 75 [2018-09-30 10:17:04,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:17:04,297 INFO L225 Difference]: With dead ends: 79 [2018-09-30 10:17:04,298 INFO L226 Difference]: Without dead ends: 77 [2018-09-30 10:17:04,298 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-30 10:17:04,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-30 10:17:04,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-30 10:17:04,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-30 10:17:04,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-09-30 10:17:04,301 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2018-09-30 10:17:04,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:17:04,301 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-09-30 10:17:04,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-30 10:17:04,301 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-09-30 10:17:04,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-30 10:17:04,302 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:17:04,302 INFO L375 BasicCegarLoop]: trace histogram [73, 1, 1, 1] [2018-09-30 10:17:04,302 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:17:04,302 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:17:04,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1949148248, now seen corresponding path program 73 times [2018-09-30 10:17:04,302 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:17:04,302 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:17:04,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:17:04,303 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:17:04,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:17:04,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:17:07,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:17:07,708 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:17:07,708 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:17:07,715 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:17:07,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:17:07,750 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:17:07,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:17:07,785 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:17:07,785 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-30 10:17:07,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-30 10:17:07,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-30 10:17:07,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-30 10:17:07,787 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 76 states. [2018-09-30 10:17:07,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:17:07,931 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-09-30 10:17:07,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-30 10:17:07,931 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 76 [2018-09-30 10:17:07,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:17:07,932 INFO L225 Difference]: With dead ends: 80 [2018-09-30 10:17:07,932 INFO L226 Difference]: Without dead ends: 78 [2018-09-30 10:17:07,933 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-30 10:17:07,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-09-30 10:17:07,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-09-30 10:17:07,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-09-30 10:17:07,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-09-30 10:17:07,935 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2018-09-30 10:17:07,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:17:07,935 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-09-30 10:17:07,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-30 10:17:07,936 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-09-30 10:17:07,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-09-30 10:17:07,936 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:17:07,936 INFO L375 BasicCegarLoop]: trace histogram [74, 1, 1, 1] [2018-09-30 10:17:07,936 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:17:07,936 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:17:07,936 INFO L82 PathProgramCache]: Analyzing trace with hash -294055519, now seen corresponding path program 74 times [2018-09-30 10:17:07,936 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:17:07,937 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:17:07,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:17:07,937 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:17:07,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:17:07,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:17:09,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:17:09,931 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:17:09,931 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:17:09,938 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:17:09,970 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:17:09,970 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:17:09,972 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:17:09,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:17:10,005 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:17:10,006 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-09-30 10:17:10,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-30 10:17:10,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-30 10:17:10,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-30 10:17:10,007 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 77 states. [2018-09-30 10:17:10,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:17:10,159 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-09-30 10:17:10,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-30 10:17:10,159 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 77 [2018-09-30 10:17:10,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:17:10,160 INFO L225 Difference]: With dead ends: 81 [2018-09-30 10:17:10,160 INFO L226 Difference]: Without dead ends: 79 [2018-09-30 10:17:10,161 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-30 10:17:10,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-30 10:17:10,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-30 10:17:10,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-30 10:17:10,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-09-30 10:17:10,163 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2018-09-30 10:17:10,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:17:10,164 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-09-30 10:17:10,164 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-30 10:17:10,164 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-09-30 10:17:10,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-30 10:17:10,164 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:17:10,164 INFO L375 BasicCegarLoop]: trace histogram [75, 1, 1, 1] [2018-09-30 10:17:10,164 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:17:10,165 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:17:10,165 INFO L82 PathProgramCache]: Analyzing trace with hash -525788472, now seen corresponding path program 75 times [2018-09-30 10:17:10,165 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:17:10,165 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:17:10,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:17:10,166 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:17:10,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:17:10,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:17:13,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:17:13,319 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:17:13,319 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:17:13,326 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:17:13,374 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-09-30 10:17:13,374 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:17:13,378 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:17:13,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:17:13,412 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:17:13,413 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-09-30 10:17:13,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-30 10:17:13,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-30 10:17:13,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 10:17:13,414 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 78 states. [2018-09-30 10:17:13,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:17:13,550 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-09-30 10:17:13,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-30 10:17:13,551 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 78 [2018-09-30 10:17:13,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:17:13,552 INFO L225 Difference]: With dead ends: 82 [2018-09-30 10:17:13,552 INFO L226 Difference]: Without dead ends: 80 [2018-09-30 10:17:13,552 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 10:17:13,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-30 10:17:13,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-09-30 10:17:13,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-30 10:17:13,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-09-30 10:17:13,555 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2018-09-30 10:17:13,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:17:13,556 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-09-30 10:17:13,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-30 10:17:13,556 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-09-30 10:17:13,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-09-30 10:17:13,556 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:17:13,556 INFO L375 BasicCegarLoop]: trace histogram [76, 1, 1, 1] [2018-09-30 10:17:13,556 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:17:13,556 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:17:13,557 INFO L82 PathProgramCache]: Analyzing trace with hash 880424577, now seen corresponding path program 76 times [2018-09-30 10:17:13,557 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:17:13,557 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:17:13,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:17:13,557 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:17:13,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:17:13,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:17:15,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:17:15,807 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:17:15,807 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:17:15,815 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:17:15,847 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:17:15,847 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:17:15,850 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:17:15,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:17:15,902 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:17:15,902 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-09-30 10:17:15,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-30 10:17:15,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-30 10:17:15,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-30 10:17:15,904 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 79 states. [2018-09-30 10:17:16,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:17:16,501 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-09-30 10:17:16,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-30 10:17:16,501 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 79 [2018-09-30 10:17:16,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:17:16,502 INFO L225 Difference]: With dead ends: 83 [2018-09-30 10:17:16,502 INFO L226 Difference]: Without dead ends: 81 [2018-09-30 10:17:16,503 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-30 10:17:16,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-30 10:17:16,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-30 10:17:16,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-30 10:17:16,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-09-30 10:17:16,505 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2018-09-30 10:17:16,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:17:16,506 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-09-30 10:17:16,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-30 10:17:16,506 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-09-30 10:17:16,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-30 10:17:16,506 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:17:16,507 INFO L375 BasicCegarLoop]: trace histogram [77, 1, 1, 1] [2018-09-30 10:17:16,507 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:17:16,507 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:17:16,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1523356136, now seen corresponding path program 77 times [2018-09-30 10:17:16,507 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:17:16,507 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:17:16,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:17:16,508 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:17:16,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:17:16,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:17:18,804 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:17:18,805 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:17:18,805 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:17:18,812 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:17:18,868 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-09-30 10:17:18,869 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:17:18,872 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:17:18,886 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:17:18,907 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:17:18,907 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-09-30 10:17:18,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-30 10:17:18,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-30 10:17:18,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-30 10:17:18,908 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 80 states. [2018-09-30 10:17:19,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:17:19,406 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2018-09-30 10:17:19,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-30 10:17:19,407 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 80 [2018-09-30 10:17:19,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:17:19,407 INFO L225 Difference]: With dead ends: 84 [2018-09-30 10:17:19,407 INFO L226 Difference]: Without dead ends: 82 [2018-09-30 10:17:19,408 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-30 10:17:19,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-30 10:17:19,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-09-30 10:17:19,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-09-30 10:17:19,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-09-30 10:17:19,410 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2018-09-30 10:17:19,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:17:19,411 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-09-30 10:17:19,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-30 10:17:19,411 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-09-30 10:17:19,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-09-30 10:17:19,411 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:17:19,412 INFO L375 BasicCegarLoop]: trace histogram [78, 1, 1, 1] [2018-09-30 10:17:19,412 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:17:19,412 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:17:19,412 INFO L82 PathProgramCache]: Analyzing trace with hash -20602015, now seen corresponding path program 78 times [2018-09-30 10:17:19,412 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:17:19,412 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:17:19,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:17:19,413 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:17:19,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:17:19,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:17:23,437 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:17:23,438 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:17:23,438 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:17:23,444 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:17:23,491 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2018-09-30 10:17:23,492 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:17:23,494 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:17:23,515 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:17:23,547 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:17:23,548 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-09-30 10:17:23,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-30 10:17:23,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-30 10:17:23,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-30 10:17:23,550 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 81 states. [2018-09-30 10:17:23,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:17:23,836 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-09-30 10:17:23,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-30 10:17:23,836 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 81 [2018-09-30 10:17:23,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:17:23,837 INFO L225 Difference]: With dead ends: 85 [2018-09-30 10:17:23,837 INFO L226 Difference]: Without dead ends: 83 [2018-09-30 10:17:23,838 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-30 10:17:23,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-30 10:17:23,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-30 10:17:23,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-30 10:17:23,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-09-30 10:17:23,840 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2018-09-30 10:17:23,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:17:23,840 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-09-30 10:17:23,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-30 10:17:23,840 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-09-30 10:17:23,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-30 10:17:23,840 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:17:23,840 INFO L375 BasicCegarLoop]: trace histogram [79, 1, 1, 1] [2018-09-30 10:17:23,840 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:17:23,841 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:17:23,841 INFO L82 PathProgramCache]: Analyzing trace with hash -638664440, now seen corresponding path program 79 times [2018-09-30 10:17:23,841 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:17:23,841 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:17:23,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:17:23,841 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:17:23,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:17:23,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:17:26,129 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:17:26,129 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:17:26,129 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:17:26,136 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:17:26,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:17:26,171 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:17:26,185 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:17:26,206 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:17:26,206 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-09-30 10:17:26,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-30 10:17:26,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-30 10:17:26,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-30 10:17:26,208 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 82 states. [2018-09-30 10:17:26,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:17:26,369 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-09-30 10:17:26,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-30 10:17:26,370 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 82 [2018-09-30 10:17:26,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:17:26,371 INFO L225 Difference]: With dead ends: 86 [2018-09-30 10:17:26,371 INFO L226 Difference]: Without dead ends: 84 [2018-09-30 10:17:26,371 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-30 10:17:26,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-09-30 10:17:26,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-09-30 10:17:26,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-09-30 10:17:26,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-09-30 10:17:26,374 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2018-09-30 10:17:26,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:17:26,375 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-09-30 10:17:26,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-30 10:17:26,375 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-09-30 10:17:26,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-30 10:17:26,375 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:17:26,375 INFO L375 BasicCegarLoop]: trace histogram [80, 1, 1, 1] [2018-09-30 10:17:26,376 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:17:26,376 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:17:26,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1676236865, now seen corresponding path program 80 times [2018-09-30 10:17:26,376 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:17:26,376 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:17:26,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:17:26,377 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:17:26,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:17:26,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:17:29,125 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:17:29,125 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:17:29,125 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:17:29,132 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:17:29,166 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:17:29,167 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:17:29,170 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:17:29,190 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:17:29,219 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:17:29,220 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-09-30 10:17:29,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-30 10:17:29,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-30 10:17:29,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-30 10:17:29,222 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 83 states. [2018-09-30 10:17:29,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:17:29,547 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-09-30 10:17:29,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-30 10:17:29,548 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 83 [2018-09-30 10:17:29,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:17:29,548 INFO L225 Difference]: With dead ends: 87 [2018-09-30 10:17:29,549 INFO L226 Difference]: Without dead ends: 85 [2018-09-30 10:17:29,549 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-30 10:17:29,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-30 10:17:29,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-30 10:17:29,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-30 10:17:29,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-09-30 10:17:29,552 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2018-09-30 10:17:29,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:17:29,552 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-09-30 10:17:29,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-30 10:17:29,552 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-09-30 10:17:29,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-30 10:17:29,553 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:17:29,553 INFO L375 BasicCegarLoop]: trace histogram [81, 1, 1, 1] [2018-09-30 10:17:29,553 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:17:29,553 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:17:29,553 INFO L82 PathProgramCache]: Analyzing trace with hash 423733288, now seen corresponding path program 81 times [2018-09-30 10:17:29,553 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:17:29,553 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:17:29,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:17:29,554 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:17:29,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:17:29,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:17:32,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:17:32,201 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:17:32,201 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:17:32,208 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:17:32,261 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-09-30 10:17:32,262 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:17:32,265 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:17:32,281 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:17:32,302 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:17:32,302 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-09-30 10:17:32,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-30 10:17:32,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-30 10:17:32,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-30 10:17:32,304 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 84 states. [2018-09-30 10:17:32,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:17:32,489 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-09-30 10:17:32,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-30 10:17:32,489 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 84 [2018-09-30 10:17:32,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:17:32,490 INFO L225 Difference]: With dead ends: 88 [2018-09-30 10:17:32,490 INFO L226 Difference]: Without dead ends: 86 [2018-09-30 10:17:32,491 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-30 10:17:32,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-09-30 10:17:32,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-09-30 10:17:32,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-09-30 10:17:32,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-09-30 10:17:32,494 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2018-09-30 10:17:32,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:17:32,494 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-09-30 10:17:32,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-30 10:17:32,494 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-09-30 10:17:32,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-09-30 10:17:32,494 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:17:32,494 INFO L375 BasicCegarLoop]: trace histogram [82, 1, 1, 1] [2018-09-30 10:17:32,495 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:17:32,495 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:17:32,495 INFO L82 PathProgramCache]: Analyzing trace with hash 250828065, now seen corresponding path program 82 times [2018-09-30 10:17:32,495 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:17:32,495 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:17:32,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:17:32,496 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:17:32,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:17:32,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:17:35,209 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:17:35,210 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:17:35,210 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:17:35,217 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:17:35,252 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:17:35,253 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:17:35,255 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:17:35,277 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:17:35,307 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:17:35,307 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-09-30 10:17:35,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-09-30 10:17:35,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-09-30 10:17:35,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-30 10:17:35,309 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 85 states. [2018-09-30 10:17:36,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:17:36,680 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-09-30 10:17:36,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-30 10:17:36,680 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 85 [2018-09-30 10:17:36,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:17:36,681 INFO L225 Difference]: With dead ends: 89 [2018-09-30 10:17:36,681 INFO L226 Difference]: Without dead ends: 87 [2018-09-30 10:17:36,681 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-30 10:17:36,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-30 10:17:36,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-09-30 10:17:36,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-30 10:17:36,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-09-30 10:17:36,684 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2018-09-30 10:17:36,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:17:36,684 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-09-30 10:17:36,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-09-30 10:17:36,684 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-09-30 10:17:36,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-30 10:17:36,685 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:17:36,685 INFO L375 BasicCegarLoop]: trace histogram [83, 1, 1, 1] [2018-09-30 10:17:36,685 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:17:36,685 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:17:36,686 INFO L82 PathProgramCache]: Analyzing trace with hash -814266552, now seen corresponding path program 83 times [2018-09-30 10:17:36,686 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:17:36,686 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:17:36,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:17:36,686 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:17:36,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:17:36,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:17:39,453 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:17:39,453 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:17:39,453 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:17:39,464 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:17:39,517 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-09-30 10:17:39,517 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:17:39,521 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:17:39,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:17:39,555 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:17:39,556 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-09-30 10:17:39,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-30 10:17:39,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-30 10:17:39,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-30 10:17:39,557 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 86 states. [2018-09-30 10:17:39,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:17:39,882 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2018-09-30 10:17:39,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-30 10:17:39,883 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 86 [2018-09-30 10:17:39,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:17:39,883 INFO L225 Difference]: With dead ends: 90 [2018-09-30 10:17:39,884 INFO L226 Difference]: Without dead ends: 88 [2018-09-30 10:17:39,884 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 [2018-09-30 10:17:39,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-09-30 10:17:39,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-09-30 10:17:39,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-09-30 10:17:39,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-09-30 10:17:39,886 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2018-09-30 10:17:39,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:17:39,886 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-09-30 10:17:39,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-30 10:17:39,886 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-09-30 10:17:39,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-09-30 10:17:39,887 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:17:39,887 INFO L375 BasicCegarLoop]: trace histogram [84, 1, 1, 1] [2018-09-30 10:17:39,888 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:17:39,888 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:17:39,888 INFO L82 PathProgramCache]: Analyzing trace with hash 527538689, now seen corresponding path program 84 times [2018-09-30 10:17:39,888 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:17:39,888 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:17:39,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:17:39,889 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:17:39,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:17:39,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:17:42,749 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:17:42,750 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:17:42,750 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:17:42,757 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:17:42,808 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-30 10:17:42,808 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:17:42,811 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:17:42,830 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:17:42,859 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:17:42,860 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-09-30 10:17:42,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-09-30 10:17:42,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-09-30 10:17:42,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-30 10:17:42,862 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 87 states. [2018-09-30 10:17:43,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:17:43,066 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-09-30 10:17:43,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-30 10:17:43,066 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 87 [2018-09-30 10:17:43,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:17:43,067 INFO L225 Difference]: With dead ends: 91 [2018-09-30 10:17:43,067 INFO L226 Difference]: Without dead ends: 89 [2018-09-30 10:17:43,068 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-30 10:17:43,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-30 10:17:43,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-09-30 10:17:43,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-30 10:17:43,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-09-30 10:17:43,073 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2018-09-30 10:17:43,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:17:43,073 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-09-30 10:17:43,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-09-30 10:17:43,073 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-09-30 10:17:43,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-30 10:17:43,074 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:17:43,074 INFO L375 BasicCegarLoop]: trace histogram [85, 1, 1, 1] [2018-09-30 10:17:43,074 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:17:43,075 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:17:43,076 INFO L82 PathProgramCache]: Analyzing trace with hash -826171800, now seen corresponding path program 85 times [2018-09-30 10:17:43,076 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:17:43,076 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:17:43,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:17:43,076 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:17:43,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:17:43,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:17:45,691 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:17:45,691 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:17:45,691 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:17:45,700 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:17:45,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:17:45,739 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:17:45,755 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:17:45,775 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:17:45,775 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-09-30 10:17:45,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-30 10:17:45,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-30 10:17:45,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-30 10:17:45,777 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 88 states. [2018-09-30 10:17:45,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:17:45,925 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2018-09-30 10:17:45,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-30 10:17:45,926 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 88 [2018-09-30 10:17:45,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:17:45,927 INFO L225 Difference]: With dead ends: 92 [2018-09-30 10:17:45,927 INFO L226 Difference]: Without dead ends: 90 [2018-09-30 10:17:45,928 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-30 10:17:45,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-09-30 10:17:45,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-09-30 10:17:45,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-09-30 10:17:45,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-09-30 10:17:45,930 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2018-09-30 10:17:45,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:17:45,931 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-09-30 10:17:45,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-30 10:17:45,931 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-09-30 10:17:45,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-09-30 10:17:45,931 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:17:45,931 INFO L375 BasicCegarLoop]: trace histogram [86, 1, 1, 1] [2018-09-30 10:17:45,931 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:17:45,932 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:17:45,932 INFO L82 PathProgramCache]: Analyzing trace with hash 158476001, now seen corresponding path program 86 times [2018-09-30 10:17:45,932 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:17:45,932 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:17:45,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:17:45,932 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:17:45,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:17:45,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:17:48,691 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:17:48,691 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:17:48,691 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:17:48,707 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:17:48,744 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:17:48,744 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:17:48,747 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:17:48,763 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:17:48,782 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:17:48,782 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-09-30 10:17:48,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-30 10:17:48,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-30 10:17:48,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-30 10:17:48,784 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 89 states. [2018-09-30 10:17:48,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:17:48,986 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-09-30 10:17:48,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-30 10:17:48,987 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 89 [2018-09-30 10:17:48,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:17:48,988 INFO L225 Difference]: With dead ends: 93 [2018-09-30 10:17:48,988 INFO L226 Difference]: Without dead ends: 91 [2018-09-30 10:17:48,988 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-30 10:17:48,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-30 10:17:48,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-30 10:17:48,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-30 10:17:48,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-09-30 10:17:48,990 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2018-09-30 10:17:48,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:17:48,990 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-09-30 10:17:48,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-30 10:17:48,991 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-09-30 10:17:48,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-30 10:17:48,991 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:17:48,991 INFO L375 BasicCegarLoop]: trace histogram [87, 1, 1, 1] [2018-09-30 10:17:48,991 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:17:48,991 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:17:48,992 INFO L82 PathProgramCache]: Analyzing trace with hash 617786760, now seen corresponding path program 87 times [2018-09-30 10:17:48,992 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:17:48,992 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:17:48,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:17:48,992 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:17:48,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:17:49,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:17:51,804 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:17:51,804 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:17:51,804 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:17:51,812 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:17:51,869 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-09-30 10:17:51,869 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:17:51,872 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:17:51,888 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:17:51,908 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:17:51,908 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-09-30 10:17:51,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-30 10:17:51,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-30 10:17:51,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-30 10:17:51,910 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 90 states. [2018-09-30 10:17:52,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:17:52,106 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-09-30 10:17:52,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-30 10:17:52,107 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 90 [2018-09-30 10:17:52,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:17:52,108 INFO L225 Difference]: With dead ends: 94 [2018-09-30 10:17:52,108 INFO L226 Difference]: Without dead ends: 92 [2018-09-30 10:17:52,109 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-30 10:17:52,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-09-30 10:17:52,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-09-30 10:17:52,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-09-30 10:17:52,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-09-30 10:17:52,112 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2018-09-30 10:17:52,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:17:52,112 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-09-30 10:17:52,112 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-30 10:17:52,112 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-09-30 10:17:52,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-09-30 10:17:52,113 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:17:52,113 INFO L375 BasicCegarLoop]: trace histogram [88, 1, 1, 1] [2018-09-30 10:17:52,113 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:17:52,113 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:17:52,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1971518401, now seen corresponding path program 88 times [2018-09-30 10:17:52,113 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:17:52,113 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:17:52,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:17:52,114 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:17:52,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:17:52,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:17:55,148 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:17:55,149 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:17:55,149 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:17:55,156 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:17:55,195 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:17:55,195 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:17:55,197 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:17:55,213 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:17:55,233 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:17:55,233 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-09-30 10:17:55,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-09-30 10:17:55,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-09-30 10:17:55,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-30 10:17:55,235 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 91 states. [2018-09-30 10:17:55,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:17:55,369 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-09-30 10:17:55,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-30 10:17:55,369 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 91 [2018-09-30 10:17:55,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:17:55,370 INFO L225 Difference]: With dead ends: 95 [2018-09-30 10:17:55,370 INFO L226 Difference]: Without dead ends: 93 [2018-09-30 10:17:55,371 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-30 10:17:55,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-30 10:17:55,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-30 10:17:55,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-30 10:17:55,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-09-30 10:17:55,374 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2018-09-30 10:17:55,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:17:55,375 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-09-30 10:17:55,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-09-30 10:17:55,375 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-09-30 10:17:55,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-30 10:17:55,375 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:17:55,375 INFO L375 BasicCegarLoop]: trace histogram [89, 1, 1, 1] [2018-09-30 10:17:55,376 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:17:55,376 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:17:55,376 INFO L82 PathProgramCache]: Analyzing trace with hash 987526312, now seen corresponding path program 89 times [2018-09-30 10:17:55,376 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:17:55,376 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:17:55,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:17:55,377 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:17:55,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:17:55,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:17:58,506 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:17:58,506 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:17:58,506 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:17:58,513 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:17:58,644 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-09-30 10:17:58,645 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:17:58,648 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:17:58,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:17:58,709 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:17:58,709 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-09-30 10:17:58,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-30 10:17:58,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-30 10:17:58,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-30 10:17:58,711 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 92 states. [2018-09-30 10:17:59,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:17:59,148 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2018-09-30 10:17:59,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-30 10:17:59,149 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 92 [2018-09-30 10:17:59,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:17:59,149 INFO L225 Difference]: With dead ends: 96 [2018-09-30 10:17:59,150 INFO L226 Difference]: Without dead ends: 94 [2018-09-30 10:17:59,150 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-30 10:17:59,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-09-30 10:17:59,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-09-30 10:17:59,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-09-30 10:17:59,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-09-30 10:17:59,152 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2018-09-30 10:17:59,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:17:59,152 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-09-30 10:17:59,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-30 10:17:59,152 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-09-30 10:17:59,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-09-30 10:17:59,152 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:17:59,153 INFO L375 BasicCegarLoop]: trace histogram [90, 1, 1, 1] [2018-09-30 10:17:59,153 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:17:59,153 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:17:59,153 INFO L82 PathProgramCache]: Analyzing trace with hash 548542625, now seen corresponding path program 90 times [2018-09-30 10:17:59,153 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:17:59,153 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:17:59,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:17:59,154 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:17:59,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:17:59,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:02,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:18:02,195 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:18:02,195 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:18:02,201 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:18:02,260 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2018-09-30 10:18:02,261 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:18:02,263 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:18:02,279 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:18:02,300 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:18:02,300 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-09-30 10:18:02,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-09-30 10:18:02,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-09-30 10:18:02,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-30 10:18:02,302 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 93 states. [2018-09-30 10:18:02,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:18:02,578 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-09-30 10:18:02,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-30 10:18:02,578 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 93 [2018-09-30 10:18:02,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:18:02,579 INFO L225 Difference]: With dead ends: 97 [2018-09-30 10:18:02,579 INFO L226 Difference]: Without dead ends: 95 [2018-09-30 10:18:02,580 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 [2018-09-30 10:18:02,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-30 10:18:02,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-30 10:18:02,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-30 10:18:02,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-09-30 10:18:02,582 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2018-09-30 10:18:02,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:18:02,582 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-09-30 10:18:02,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-09-30 10:18:02,583 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-09-30 10:18:02,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-30 10:18:02,583 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:18:02,583 INFO L375 BasicCegarLoop]: trace histogram [91, 1, 1, 1] [2018-09-30 10:18:02,583 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:18:02,584 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:18:02,584 INFO L82 PathProgramCache]: Analyzing trace with hash -175049784, now seen corresponding path program 91 times [2018-09-30 10:18:02,584 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:18:02,584 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:18:02,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:02,585 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:18:02,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:02,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:05,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:18:05,632 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:18:05,632 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:18:05,640 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:18:05,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:05,679 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:18:05,704 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:18:05,734 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:18:05,734 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-09-30 10:18:05,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-30 10:18:05,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-30 10:18:05,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-30 10:18:05,736 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 94 states. [2018-09-30 10:18:06,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:18:06,716 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-09-30 10:18:06,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-30 10:18:06,716 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 94 [2018-09-30 10:18:06,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:18:06,717 INFO L225 Difference]: With dead ends: 98 [2018-09-30 10:18:06,717 INFO L226 Difference]: Without dead ends: 96 [2018-09-30 10:18:06,718 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-30 10:18:06,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-09-30 10:18:06,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-09-30 10:18:06,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-09-30 10:18:06,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-09-30 10:18:06,720 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2018-09-30 10:18:06,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:18:06,720 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-09-30 10:18:06,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-30 10:18:06,720 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-09-30 10:18:06,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-09-30 10:18:06,720 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:18:06,721 INFO L375 BasicCegarLoop]: trace histogram [92, 1, 1, 1] [2018-09-30 10:18:06,721 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:18:06,721 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:18:06,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1131577983, now seen corresponding path program 92 times [2018-09-30 10:18:06,721 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:18:06,721 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:18:06,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:06,722 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:18:06,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:06,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:10,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:18:10,806 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:18:10,806 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:18:10,813 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:18:10,851 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:18:10,851 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:18:10,854 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:18:10,875 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:18:10,898 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:18:10,899 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-09-30 10:18:10,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-09-30 10:18:10,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-09-30 10:18:10,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-30 10:18:10,900 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 95 states. [2018-09-30 10:18:11,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:18:11,092 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-09-30 10:18:11,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-30 10:18:11,093 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 95 [2018-09-30 10:18:11,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:18:11,093 INFO L225 Difference]: With dead ends: 99 [2018-09-30 10:18:11,094 INFO L226 Difference]: Without dead ends: 97 [2018-09-30 10:18:11,094 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-30 10:18:11,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-30 10:18:11,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-30 10:18:11,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-30 10:18:11,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-09-30 10:18:11,097 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2018-09-30 10:18:11,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:18:11,098 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-09-30 10:18:11,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-09-30 10:18:11,098 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-09-30 10:18:11,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-30 10:18:11,098 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:18:11,098 INFO L375 BasicCegarLoop]: trace histogram [93, 1, 1, 1] [2018-09-30 10:18:11,098 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:18:11,098 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:18:11,099 INFO L82 PathProgramCache]: Analyzing trace with hash -719181080, now seen corresponding path program 93 times [2018-09-30 10:18:11,099 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:18:11,099 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:18:11,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:11,100 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:18:11,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:11,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:14,393 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:18:14,394 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:18:14,394 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:18:14,403 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:18:14,466 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-09-30 10:18:14,467 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:18:14,471 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:18:14,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:18:14,527 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:18:14,528 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-09-30 10:18:14,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-30 10:18:14,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-30 10:18:14,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-30 10:18:14,529 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 96 states. [2018-09-30 10:18:14,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:18:14,735 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2018-09-30 10:18:14,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-30 10:18:14,735 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 96 [2018-09-30 10:18:14,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:18:14,736 INFO L225 Difference]: With dead ends: 100 [2018-09-30 10:18:14,736 INFO L226 Difference]: Without dead ends: 98 [2018-09-30 10:18:14,737 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-30 10:18:14,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-09-30 10:18:14,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-09-30 10:18:14,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-09-30 10:18:14,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-09-30 10:18:14,740 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2018-09-30 10:18:14,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:18:14,740 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-09-30 10:18:14,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-30 10:18:14,740 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-09-30 10:18:14,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-09-30 10:18:14,740 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:18:14,741 INFO L375 BasicCegarLoop]: trace histogram [94, 1, 1, 1] [2018-09-30 10:18:14,741 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:18:14,741 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:18:14,741 INFO L82 PathProgramCache]: Analyzing trace with hash -819778975, now seen corresponding path program 94 times [2018-09-30 10:18:14,741 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:18:14,741 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:18:14,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:14,742 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:18:14,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:14,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:18,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:18:18,088 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:18:18,088 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:18:18,095 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:18:18,132 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:18:18,132 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:18:18,135 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:18:18,158 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:18:18,187 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:18:18,187 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-09-30 10:18:18,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-09-30 10:18:18,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-09-30 10:18:18,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-30 10:18:18,189 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 97 states. [2018-09-30 10:18:18,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:18:18,459 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-09-30 10:18:18,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-30 10:18:18,459 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 97 [2018-09-30 10:18:18,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:18:18,460 INFO L225 Difference]: With dead ends: 101 [2018-09-30 10:18:18,460 INFO L226 Difference]: Without dead ends: 99 [2018-09-30 10:18:18,461 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 [2018-09-30 10:18:18,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-30 10:18:18,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-30 10:18:18,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-30 10:18:18,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-09-30 10:18:18,466 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2018-09-30 10:18:18,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:18:18,466 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-09-30 10:18:18,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-09-30 10:18:18,466 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-09-30 10:18:18,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-30 10:18:18,467 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:18:18,467 INFO L375 BasicCegarLoop]: trace histogram [95, 1, 1, 1] [2018-09-30 10:18:18,467 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:18:18,468 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:18:18,468 INFO L82 PathProgramCache]: Analyzing trace with hash 356653576, now seen corresponding path program 95 times [2018-09-30 10:18:18,468 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:18:18,468 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:18:18,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:18,469 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:18:18,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:18,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:21,711 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:18:21,712 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:18:21,712 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:18:21,720 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:18:21,784 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-09-30 10:18:21,785 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:18:21,788 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:18:21,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:18:21,826 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:18:21,826 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-09-30 10:18:21,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-30 10:18:21,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-30 10:18:21,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-09-30 10:18:21,828 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 98 states. [2018-09-30 10:18:22,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:18:22,456 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2018-09-30 10:18:22,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-09-30 10:18:22,457 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 98 [2018-09-30 10:18:22,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:18:22,458 INFO L225 Difference]: With dead ends: 102 [2018-09-30 10:18:22,458 INFO L226 Difference]: Without dead ends: 100 [2018-09-30 10:18:22,459 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-09-30 10:18:22,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-09-30 10:18:22,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-09-30 10:18:22,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-09-30 10:18:22,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-09-30 10:18:22,462 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2018-09-30 10:18:22,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:18:22,462 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-09-30 10:18:22,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-30 10:18:22,462 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-09-30 10:18:22,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-09-30 10:18:22,463 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:18:22,463 INFO L375 BasicCegarLoop]: trace histogram [96, 1, 1, 1] [2018-09-30 10:18:22,463 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:18:22,463 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:18:22,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1828643007, now seen corresponding path program 96 times [2018-09-30 10:18:22,464 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:18:22,464 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:18:22,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:22,464 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:18:22,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:22,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:26,026 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:18:26,027 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:18:26,027 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:18:26,034 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:18:26,099 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-30 10:18:26,099 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:18:26,101 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:18:26,119 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:18:26,139 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:18:26,139 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-09-30 10:18:26,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-09-30 10:18:26,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-09-30 10:18:26,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-09-30 10:18:26,141 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 99 states. [2018-09-30 10:18:26,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:18:26,380 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-09-30 10:18:26,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-09-30 10:18:26,381 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 99 [2018-09-30 10:18:26,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:18:26,381 INFO L225 Difference]: With dead ends: 103 [2018-09-30 10:18:26,382 INFO L226 Difference]: Without dead ends: 101 [2018-09-30 10:18:26,382 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-09-30 10:18:26,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-30 10:18:26,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-30 10:18:26,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-30 10:18:26,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-09-30 10:18:26,385 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2018-09-30 10:18:26,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:18:26,385 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-09-30 10:18:26,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-09-30 10:18:26,385 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-09-30 10:18:26,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-30 10:18:26,386 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:18:26,386 INFO L375 BasicCegarLoop]: trace histogram [97, 1, 1, 1] [2018-09-30 10:18:26,386 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:18:26,386 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:18:26,386 INFO L82 PathProgramCache]: Analyzing trace with hash -853360344, now seen corresponding path program 97 times [2018-09-30 10:18:26,386 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:18:26,386 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:18:26,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:26,387 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:18:26,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:26,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:30,109 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:18:30,109 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:18:30,109 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:18:30,117 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:18:30,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:30,161 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:18:30,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:18:30,207 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:18:30,207 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-09-30 10:18:30,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-30 10:18:30,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-30 10:18:30,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-09-30 10:18:30,209 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 100 states. [2018-09-30 10:18:30,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:18:30,448 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2018-09-30 10:18:30,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-09-30 10:18:30,448 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 100 [2018-09-30 10:18:30,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:18:30,449 INFO L225 Difference]: With dead ends: 104 [2018-09-30 10:18:30,450 INFO L226 Difference]: Without dead ends: 102 [2018-09-30 10:18:30,450 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-09-30 10:18:30,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-09-30 10:18:30,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-09-30 10:18:30,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-09-30 10:18:30,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-09-30 10:18:30,453 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2018-09-30 10:18:30,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:18:30,453 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-09-30 10:18:30,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-30 10:18:30,453 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-09-30 10:18:30,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-09-30 10:18:30,454 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:18:30,454 INFO L375 BasicCegarLoop]: trace histogram [98, 1, 1, 1] [2018-09-30 10:18:30,454 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:18:30,454 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:18:30,454 INFO L82 PathProgramCache]: Analyzing trace with hash -684368863, now seen corresponding path program 98 times [2018-09-30 10:18:30,454 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:18:30,454 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:18:30,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:30,455 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:18:30,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:30,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:34,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:18:34,095 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:18:34,095 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:18:34,102 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:18:34,145 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:18:34,145 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:18:34,148 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:18:34,165 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:18:34,186 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:18:34,186 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-09-30 10:18:34,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-30 10:18:34,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-30 10:18:34,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-09-30 10:18:34,187 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 101 states. [2018-09-30 10:18:34,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:18:34,386 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-09-30 10:18:34,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-09-30 10:18:34,387 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 101 [2018-09-30 10:18:34,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:18:34,388 INFO L225 Difference]: With dead ends: 105 [2018-09-30 10:18:34,388 INFO L226 Difference]: Without dead ends: 103 [2018-09-30 10:18:34,388 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-09-30 10:18:34,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-30 10:18:34,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-30 10:18:34,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-30 10:18:34,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-09-30 10:18:34,391 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101 [2018-09-30 10:18:34,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:18:34,392 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-09-30 10:18:34,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-30 10:18:34,392 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-09-30 10:18:34,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-30 10:18:34,392 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:18:34,392 INFO L375 BasicCegarLoop]: trace histogram [99, 1, 1, 1] [2018-09-30 10:18:34,392 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:18:34,393 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:18:34,393 INFO L82 PathProgramCache]: Analyzing trace with hash 259399752, now seen corresponding path program 99 times [2018-09-30 10:18:34,393 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:18:34,393 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:18:34,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:34,394 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:18:34,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:34,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:37,864 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:18:37,865 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:18:37,865 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:18:37,871 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:18:37,937 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2018-09-30 10:18:37,937 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:18:37,941 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:18:37,960 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:18:37,980 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:18:37,980 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-09-30 10:18:37,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-30 10:18:37,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-30 10:18:37,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-09-30 10:18:37,982 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 102 states. [2018-09-30 10:18:38,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:18:38,284 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2018-09-30 10:18:38,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-09-30 10:18:38,284 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 102 [2018-09-30 10:18:38,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:18:38,285 INFO L225 Difference]: With dead ends: 106 [2018-09-30 10:18:38,285 INFO L226 Difference]: Without dead ends: 104 [2018-09-30 10:18:38,286 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-09-30 10:18:38,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-09-30 10:18:38,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-09-30 10:18:38,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-09-30 10:18:38,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-09-30 10:18:38,289 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102 [2018-09-30 10:18:38,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:18:38,289 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-09-30 10:18:38,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-30 10:18:38,289 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-09-30 10:18:38,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-09-30 10:18:38,290 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:18:38,290 INFO L375 BasicCegarLoop]: trace histogram [100, 1, 1, 1] [2018-09-30 10:18:38,290 INFO L423 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:18:38,290 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:18:38,290 INFO L82 PathProgramCache]: Analyzing trace with hash -548544255, now seen corresponding path program 100 times [2018-09-30 10:18:38,290 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:18:38,290 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:18:38,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:38,291 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:18:38,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:38,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:42,006 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:18:42,006 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:18:42,006 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:18:42,014 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:18:42,053 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:18:42,053 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:18:42,056 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:18:42,074 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:18:42,094 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:18:42,094 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-09-30 10:18:42,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-09-30 10:18:42,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-09-30 10:18:42,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-09-30 10:18:42,095 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 103 states. [2018-09-30 10:18:42,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:18:42,269 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-09-30 10:18:42,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-30 10:18:42,269 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 103 [2018-09-30 10:18:42,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:18:42,271 INFO L225 Difference]: With dead ends: 107 [2018-09-30 10:18:42,271 INFO L226 Difference]: Without dead ends: 105 [2018-09-30 10:18:42,272 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-09-30 10:18:42,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-09-30 10:18:42,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-09-30 10:18:42,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-30 10:18:42,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-09-30 10:18:42,275 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 103 [2018-09-30 10:18:42,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:18:42,275 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-09-30 10:18:42,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-09-30 10:18:42,275 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-09-30 10:18:42,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-30 10:18:42,276 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:18:42,276 INFO L375 BasicCegarLoop]: trace histogram [101, 1, 1, 1] [2018-09-30 10:18:42,276 INFO L423 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:18:42,276 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:18:42,276 INFO L82 PathProgramCache]: Analyzing trace with hash 174995304, now seen corresponding path program 101 times [2018-09-30 10:18:42,277 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:18:42,277 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:18:42,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:42,277 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:18:42,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:42,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:46,298 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:18:46,298 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:18:46,298 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:18:46,307 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:18:46,383 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2018-09-30 10:18:46,383 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:18:46,386 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:18:46,406 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:18:46,426 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:18:46,426 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-09-30 10:18:46,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-30 10:18:46,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-30 10:18:46,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-09-30 10:18:46,428 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 104 states. [2018-09-30 10:18:46,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:18:46,641 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2018-09-30 10:18:46,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-09-30 10:18:46,642 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 104 [2018-09-30 10:18:46,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:18:46,643 INFO L225 Difference]: With dead ends: 108 [2018-09-30 10:18:46,643 INFO L226 Difference]: Without dead ends: 106 [2018-09-30 10:18:46,644 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-09-30 10:18:46,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-09-30 10:18:46,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-09-30 10:18:46,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-09-30 10:18:46,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-09-30 10:18:46,647 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 104 [2018-09-30 10:18:46,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:18:46,647 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-09-30 10:18:46,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-30 10:18:46,647 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-09-30 10:18:46,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-09-30 10:18:46,648 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:18:46,648 INFO L375 BasicCegarLoop]: trace histogram [102, 1, 1, 1] [2018-09-30 10:18:46,648 INFO L423 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:18:46,649 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:18:46,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1129885153, now seen corresponding path program 102 times [2018-09-30 10:18:46,649 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:18:46,649 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:18:46,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:46,650 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:18:46,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:46,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:50,726 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:18:50,726 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:18:50,726 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:18:50,736 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:18:50,803 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2018-09-30 10:18:50,803 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:18:50,806 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:18:50,825 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:18:50,844 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:18:50,845 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-09-30 10:18:50,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-09-30 10:18:50,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-09-30 10:18:50,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-09-30 10:18:50,846 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 105 states. [2018-09-30 10:18:51,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:18:51,106 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-09-30 10:18:51,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-09-30 10:18:51,106 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 105 [2018-09-30 10:18:51,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:18:51,107 INFO L225 Difference]: With dead ends: 109 [2018-09-30 10:18:51,107 INFO L226 Difference]: Without dead ends: 107 [2018-09-30 10:18:51,108 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-09-30 10:18:51,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-30 10:18:51,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-09-30 10:18:51,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-30 10:18:51,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-09-30 10:18:51,111 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 105 [2018-09-30 10:18:51,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:18:51,111 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-09-30 10:18:51,112 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-09-30 10:18:51,112 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-09-30 10:18:51,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-30 10:18:51,112 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:18:51,112 INFO L375 BasicCegarLoop]: trace histogram [103, 1, 1, 1] [2018-09-30 10:18:51,112 INFO L423 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:18:51,113 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:18:51,113 INFO L82 PathProgramCache]: Analyzing trace with hash 666699400, now seen corresponding path program 103 times [2018-09-30 10:18:51,113 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:18:51,113 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:18:51,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:51,114 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:18:51,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:51,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:55,317 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:18:55,318 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:18:55,318 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:18:55,325 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:18:55,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:55,370 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:18:55,410 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:18:55,430 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:18:55,430 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-09-30 10:18:55,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-30 10:18:55,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-30 10:18:55,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-09-30 10:18:55,432 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 106 states. [2018-09-30 10:18:55,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:18:55,708 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2018-09-30 10:18:55,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-09-30 10:18:55,709 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 106 [2018-09-30 10:18:55,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:18:55,710 INFO L225 Difference]: With dead ends: 110 [2018-09-30 10:18:55,710 INFO L226 Difference]: Without dead ends: 108 [2018-09-30 10:18:55,711 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-09-30 10:18:55,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-09-30 10:18:55,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-09-30 10:18:55,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-09-30 10:18:55,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-09-30 10:18:55,713 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 106 [2018-09-30 10:18:55,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:18:55,713 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-09-30 10:18:55,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-30 10:18:55,713 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-09-30 10:18:55,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-09-30 10:18:55,713 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:18:55,714 INFO L375 BasicCegarLoop]: trace histogram [104, 1, 1, 1] [2018-09-30 10:18:55,714 INFO L423 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:18:55,714 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:18:55,714 INFO L82 PathProgramCache]: Analyzing trace with hash -807157055, now seen corresponding path program 104 times [2018-09-30 10:18:55,714 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:18:55,714 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:18:55,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:55,715 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:18:55,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:55,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:59,852 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:18:59,852 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:18:59,852 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:18:59,859 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:18:59,902 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:18:59,902 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:18:59,905 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:18:59,930 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:18:59,958 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:18:59,959 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106 [2018-09-30 10:18:59,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-09-30 10:18:59,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-09-30 10:18:59,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-09-30 10:18:59,961 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 107 states. [2018-09-30 10:19:00,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:00,151 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-09-30 10:19:00,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-09-30 10:19:00,151 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 107 [2018-09-30 10:19:00,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:00,152 INFO L225 Difference]: With dead ends: 111 [2018-09-30 10:19:00,152 INFO L226 Difference]: Without dead ends: 109 [2018-09-30 10:19:00,152 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-09-30 10:19:00,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-30 10:19:00,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-30 10:19:00,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-30 10:19:00,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-09-30 10:19:00,155 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 107 [2018-09-30 10:19:00,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:00,156 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-09-30 10:19:00,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-09-30 10:19:00,156 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-09-30 10:19:00,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-30 10:19:00,156 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:00,156 INFO L375 BasicCegarLoop]: trace histogram [105, 1, 1, 1] [2018-09-30 10:19:00,156 INFO L423 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:00,157 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:00,157 INFO L82 PathProgramCache]: Analyzing trace with hash 747933096, now seen corresponding path program 105 times [2018-09-30 10:19:00,157 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:00,157 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:00,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:00,157 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:00,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:00,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:04,351 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:04,352 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:04,352 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:04,358 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:19:04,432 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2018-09-30 10:19:04,432 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:04,436 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:04,456 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:04,476 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:04,477 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-09-30 10:19:04,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-30 10:19:04,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-30 10:19:04,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-09-30 10:19:04,478 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 108 states. [2018-09-30 10:19:04,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:04,765 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2018-09-30 10:19:04,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-09-30 10:19:04,766 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 108 [2018-09-30 10:19:04,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:04,766 INFO L225 Difference]: With dead ends: 112 [2018-09-30 10:19:04,766 INFO L226 Difference]: Without dead ends: 110 [2018-09-30 10:19:04,767 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-09-30 10:19:04,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-09-30 10:19:04,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-09-30 10:19:04,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-09-30 10:19:04,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-09-30 10:19:04,769 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 108 [2018-09-30 10:19:04,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:04,769 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-09-30 10:19:04,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-30 10:19:04,769 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-09-30 10:19:04,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-09-30 10:19:04,770 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:04,770 INFO L375 BasicCegarLoop]: trace histogram [106, 1, 1, 1] [2018-09-30 10:19:04,770 INFO L423 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:04,771 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:04,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1711087521, now seen corresponding path program 106 times [2018-09-30 10:19:04,771 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:04,771 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:04,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:04,772 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:04,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:04,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:09,006 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:09,006 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:09,006 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:09,013 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:19:09,057 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:19:09,057 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:09,060 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:09,079 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:09,100 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:09,100 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 108 [2018-09-30 10:19:09,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-09-30 10:19:09,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-09-30 10:19:09,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-09-30 10:19:09,102 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 109 states. [2018-09-30 10:19:09,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:09,453 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-09-30 10:19:09,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-09-30 10:19:09,454 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 109 [2018-09-30 10:19:09,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:09,455 INFO L225 Difference]: With dead ends: 113 [2018-09-30 10:19:09,455 INFO L226 Difference]: Without dead ends: 111 [2018-09-30 10:19:09,455 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-09-30 10:19:09,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-30 10:19:09,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-09-30 10:19:09,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-30 10:19:09,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-09-30 10:19:09,457 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 109 [2018-09-30 10:19:09,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:09,458 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-09-30 10:19:09,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-09-30 10:19:09,458 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-09-30 10:19:09,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-30 10:19:09,458 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:09,458 INFO L375 BasicCegarLoop]: trace histogram [107, 1, 1, 1] [2018-09-30 10:19:09,458 INFO L423 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:09,459 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:09,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1504103624, now seen corresponding path program 107 times [2018-09-30 10:19:09,459 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:09,459 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:09,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:09,459 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:09,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:09,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:13,696 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:13,696 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:13,696 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:13,706 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:19:13,781 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2018-09-30 10:19:13,781 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:13,784 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:13,805 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:13,825 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:13,825 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109] total 109 [2018-09-30 10:19:13,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-09-30 10:19:13,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-09-30 10:19:13,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-09-30 10:19:13,827 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 110 states. [2018-09-30 10:19:14,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:14,164 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2018-09-30 10:19:14,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-09-30 10:19:14,165 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 110 [2018-09-30 10:19:14,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:14,166 INFO L225 Difference]: With dead ends: 114 [2018-09-30 10:19:14,166 INFO L226 Difference]: Without dead ends: 112 [2018-09-30 10:19:14,167 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-09-30 10:19:14,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-09-30 10:19:14,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-09-30 10:19:14,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-09-30 10:19:14,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-09-30 10:19:14,169 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 110 [2018-09-30 10:19:14,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:14,170 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-09-30 10:19:14,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-09-30 10:19:14,170 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-09-30 10:19:14,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-09-30 10:19:14,170 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:14,170 INFO L375 BasicCegarLoop]: trace histogram [108, 1, 1, 1] [2018-09-30 10:19:14,171 INFO L423 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:14,171 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:14,171 INFO L82 PathProgramCache]: Analyzing trace with hash -617429887, now seen corresponding path program 108 times [2018-09-30 10:19:14,171 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:14,171 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:14,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:14,172 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:14,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:14,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:18,537 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 0 proven. 5886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:18,537 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:18,537 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:18,558 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:19:18,636 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-09-30 10:19:18,637 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:18,640 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:18,662 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 0 proven. 5886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:18,682 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:18,682 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 110] total 110 [2018-09-30 10:19:18,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 111 states [2018-09-30 10:19:18,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2018-09-30 10:19:18,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-09-30 10:19:18,684 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 111 states. [2018-09-30 10:19:18,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:18,994 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-09-30 10:19:18,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-09-30 10:19:18,994 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 111 [2018-09-30 10:19:18,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:18,995 INFO L225 Difference]: With dead ends: 115 [2018-09-30 10:19:18,995 INFO L226 Difference]: Without dead ends: 113 [2018-09-30 10:19:18,996 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-09-30 10:19:18,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-30 10:19:18,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-09-30 10:19:18,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-30 10:19:18,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-09-30 10:19:18,998 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 111 [2018-09-30 10:19:18,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:18,999 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-09-30 10:19:18,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has 111 states. [2018-09-30 10:19:18,999 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-09-30 10:19:18,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-30 10:19:18,999 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:18,999 INFO L375 BasicCegarLoop]: trace histogram [109, 1, 1, 1] [2018-09-30 10:19:19,000 INFO L423 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:19,000 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:19,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1960459288, now seen corresponding path program 109 times [2018-09-30 10:19:19,000 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:19,000 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:19,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:19,001 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:19,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:19,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:23,924 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:23,925 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:23,925 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:23,932 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:19:23,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:23,978 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:24,001 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:24,022 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:24,022 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 111] total 111 [2018-09-30 10:19:24,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-09-30 10:19:24,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-09-30 10:19:24,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2018-09-30 10:19:24,023 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 112 states. [2018-09-30 10:19:24,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:24,322 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2018-09-30 10:19:24,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-09-30 10:19:24,323 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 112 [2018-09-30 10:19:24,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:24,324 INFO L225 Difference]: With dead ends: 116 [2018-09-30 10:19:24,324 INFO L226 Difference]: Without dead ends: 114 [2018-09-30 10:19:24,325 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2018-09-30 10:19:24,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-09-30 10:19:24,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-09-30 10:19:24,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-09-30 10:19:24,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2018-09-30 10:19:24,328 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 112 [2018-09-30 10:19:24,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:24,328 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2018-09-30 10:19:24,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-09-30 10:19:24,328 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2018-09-30 10:19:24,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-09-30 10:19:24,329 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:24,329 INFO L375 BasicCegarLoop]: trace histogram [110, 1, 1, 1] [2018-09-30 10:19:24,329 INFO L423 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:24,329 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:24,330 INFO L82 PathProgramCache]: Analyzing trace with hash -644697759, now seen corresponding path program 110 times [2018-09-30 10:19:24,330 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:24,330 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:24,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:24,330 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:19:24,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:24,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:29,322 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:29,322 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:29,322 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:29,330 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:19:29,375 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:19:29,376 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:29,379 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:29,417 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:29,439 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:29,439 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 112] total 112 [2018-09-30 10:19:29,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-09-30 10:19:29,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-09-30 10:19:29,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2018-09-30 10:19:29,441 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 113 states. [2018-09-30 10:19:29,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:29,867 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-09-30 10:19:29,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-09-30 10:19:29,867 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 113 [2018-09-30 10:19:29,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:29,868 INFO L225 Difference]: With dead ends: 117 [2018-09-30 10:19:29,868 INFO L226 Difference]: Without dead ends: 115 [2018-09-30 10:19:29,869 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2018-09-30 10:19:29,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-30 10:19:29,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-09-30 10:19:29,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-30 10:19:29,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-09-30 10:19:29,872 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 113 [2018-09-30 10:19:29,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:29,872 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-09-30 10:19:29,872 INFO L481 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-09-30 10:19:29,872 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-09-30 10:19:29,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-30 10:19:29,873 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:29,873 INFO L375 BasicCegarLoop]: trace histogram [111, 1, 1, 1] [2018-09-30 10:19:29,873 INFO L423 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:29,873 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:29,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1489203976, now seen corresponding path program 111 times [2018-09-30 10:19:29,873 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:29,873 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:29,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:29,874 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:29,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:29,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:34,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:34,446 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:34,446 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:34,454 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:19:34,604 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 57 check-sat command(s) [2018-09-30 10:19:34,605 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:34,608 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:34,629 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:19:34,650 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:34,650 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 113] total 113 [2018-09-30 10:19:34,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-09-30 10:19:34,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-09-30 10:19:34,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6441, Invalid=6441, Unknown=0, NotChecked=0, Total=12882 [2018-09-30 10:19:34,652 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 114 states. [2018-09-30 10:19:35,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:35,003 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2018-09-30 10:19:35,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2018-09-30 10:19:35,004 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 114 [2018-09-30 10:19:35,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:35,005 INFO L225 Difference]: With dead ends: 118 [2018-09-30 10:19:35,005 INFO L226 Difference]: Without dead ends: 116 [2018-09-30 10:19:35,005 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=6441, Invalid=6441, Unknown=0, NotChecked=0, Total=12882 [2018-09-30 10:19:35,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-09-30 10:19:35,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-09-30 10:19:35,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-09-30 10:19:35,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2018-09-30 10:19:35,009 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 114 [2018-09-30 10:19:35,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:35,009 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2018-09-30 10:19:35,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-09-30 10:19:35,009 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2018-09-30 10:19:35,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-09-30 10:19:35,010 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:35,010 INFO L375 BasicCegarLoop]: trace histogram [112, 1, 1, 1] [2018-09-30 10:19:35,010 INFO L423 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:35,010 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:35,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1079318975, now seen corresponding path program 112 times [2018-09-30 10:19:35,010 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:35,010 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:35,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:35,011 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:35,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:35,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-09-30 10:19:36,171 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-30 10:19:36,176 WARN L206 ceAbstractionStarter]: Timeout [2018-09-30 10:19:36,177 INFO L202 PluginConnector]: Adding new model count_by_2.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.09 10:19:36 BoogieIcfgContainer [2018-09-30 10:19:36,177 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-30 10:19:36,177 INFO L168 Benchmark]: Toolchain (without parser) took 233792.25 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -153.1 MB). Free memory was 1.5 GB in the beginning and 1.0 GB in the end (delta: 407.3 MB). Peak memory consumption was 254.2 MB. Max. memory is 7.1 GB. [2018-09-30 10:19:36,179 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 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. [2018-09-30 10:19:36,179 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.43 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. [2018-09-30 10:19:36,179 INFO L168 Benchmark]: Boogie Preprocessor took 18.50 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. [2018-09-30 10:19:36,179 INFO L168 Benchmark]: RCFGBuilder took 238.68 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. [2018-09-30 10:19:36,180 INFO L168 Benchmark]: TraceAbstraction took 233490.02 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -153.1 MB). Free memory was 1.4 GB in the beginning and 1.0 GB in the end (delta: 386.1 MB). Peak memory consumption was 233.0 MB. Max. memory is 7.1 GB. [2018-09-30 10:19:36,182 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 0.19 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 39.43 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 18.50 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 238.68 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 233490.02 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -153.1 MB). Free memory was 1.4 GB in the beginning and 1.0 GB in the end (delta: 386.1 MB). Peak memory consumption was 233.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 32]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 32). Cancelled while BasicCegarLoop was analyzing trace of length 116 with TraceHistMax 112, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 54 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 233.4s OverallTime, 113 OverallIterations, 112 TraceHistogramMax, 21.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 336 SDtfs, 0 SDslu, 4969 SDs, 0 SdLazy, 11409 SolverSat, 166 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 15.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12878 GetRequests, 6550 SyntacticMatches, 0 SemanticMatches, 6328 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 195.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=116occurred in iteration=112, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 112 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 5.2s SatisfiabilityAnalysisTime, 199.9s InterpolantComputationTime, 13101 NumberOfCodeBlocks, 13101 NumberOfCodeBlocksAsserted, 1837 NumberOfCheckSat, 12878 ConstructedInterpolants, 0 QuantifiedInterpolants, 2898440 SizeOfPredicates, 111 NumberOfNonLiveVariables, 20091 ConjunctsInSsa, 6456 ConjunctsInUnsatCore, 223 InterpolantComputations, 1 PerfectInterpolantSequences, 0/468272 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/count_by_2.i_3.bplTransformedIcfg_BEv2_3.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-30_10-19-36-190.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/count_by_2.i_3.bplTransformedIcfg_BEv2_3.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-30_10-19-36-190.csv Completed graceful shutdown