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/down.i_4.bplTransformedIcfg_BEv2_5.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-133090d [2018-10-04 09:12:15,895 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-04 09:12:15,897 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-04 09:12:15,909 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2018-10-04 09:12:15,940 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-10-04 09:12:15,955 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-04 09:12:15,955 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-04 09:12:15,956 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-04 09:12:15,956 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-04 09:12:15,957 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-04 09:12:15,957 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-04 09:12:15,957 INFO L133 SettingsManager]: * Use SBE=true [2018-10-04 09:12:15,957 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-04 09:12:15,958 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-04 09:12:15,958 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-04 09:12:15,958 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-04 09:12:15,958 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-04 09:12:15,958 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-04 09:12:15,959 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-04 09:12:15,959 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-04 09:12:15,959 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-04 09:12:15,959 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-04 09:12:15,959 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-04 09:12:15,960 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-04 09:12:15,960 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-04 09:12:15,960 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-04 09:12:15,960 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-04 09:12:15,960 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 09:12:15,960 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-04 09:12:15,961 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-04 09:12:15,961 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-04 09:12:15,961 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-04 09:12:15,961 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-04 09:12:15,961 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-04 09:12:15,962 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-04 09:12:16,010 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-04 09:12:16,023 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-04 09:12:16,027 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-04 09:12:16,029 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-04 09:12:16,029 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-04 09:12:16,030 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/down.i_4.bplTransformedIcfg_BEv2_5.bpl [2018-10-04 09:12:16,030 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/down.i_4.bplTransformedIcfg_BEv2_5.bpl' [2018-10-04 09:12:16,094 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-04 09:12:16,095 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-04 09:12:16,096 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-04 09:12:16,096 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-04 09:12:16,097 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-04 09:12:16,119 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:12:16" (1/1) ... [2018-10-04 09:12:16,131 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:12:16" (1/1) ... [2018-10-04 09:12:16,139 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-04 09:12:16,140 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-04 09:12:16,140 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-04 09:12:16,140 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-04 09:12:16,152 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:12:16" (1/1) ... [2018-10-04 09:12:16,153 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:12:16" (1/1) ... [2018-10-04 09:12:16,154 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:12:16" (1/1) ... [2018-10-04 09:12:16,156 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:12:16" (1/1) ... [2018-10-04 09:12:16,159 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:12:16" (1/1) ... [2018-10-04 09:12:16,162 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:12:16" (1/1) ... [2018-10-04 09:12:16,164 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:12:16" (1/1) ... [2018-10-04 09:12:16,166 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-04 09:12:16,166 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-04 09:12:16,166 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-04 09:12:16,167 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-04 09:12:16,167 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:12:16" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 09:12:16,227 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-10-04 09:12:16,228 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-04 09:12:16,228 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-04 09:12:16,580 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-04 09:12:16,581 INFO L202 PluginConnector]: Adding new model down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 09:12:16 BoogieIcfgContainer [2018-10-04 09:12:16,581 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-04 09:12:16,582 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-04 09:12:16,582 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-04 09:12:16,585 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-04 09:12:16,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:12:16" (1/2) ... [2018-10-04 09:12:16,589 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b15719d and model type down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 09:12:16, skipping insertion in model container [2018-10-04 09:12:16,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 09:12:16" (2/2) ... [2018-10-04 09:12:16,591 INFO L112 eAbstractionObserver]: Analyzing ICFG down.i_4.bplTransformedIcfg_BEv2_5.bpl [2018-10-04 09:12:16,603 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-04 09:12:16,613 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-04 09:12:16,656 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-04 09:12:16,657 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-04 09:12:16,657 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-04 09:12:16,657 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-04 09:12:16,657 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-04 09:12:16,658 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-04 09:12:16,658 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-04 09:12:16,658 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-04 09:12:16,658 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-04 09:12:16,673 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2018-10-04 09:12:16,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-04 09:12:16,679 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:16,680 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-10-04 09:12:16,681 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:16,687 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:16,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1951930377, now seen corresponding path program 1 times [2018-10-04 09:12:16,690 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:16,691 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:16,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:16,741 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:12:16,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:16,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:16,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:16,861 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 09:12:16,861 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-04 09:12:16,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-04 09:12:16,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-04 09:12:16,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-04 09:12:16,903 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2018-10-04 09:12:16,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:16,999 INFO L93 Difference]: Finished difference Result 23 states and 30 transitions. [2018-10-04 09:12:17,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-04 09:12:17,001 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-10-04 09:12:17,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:17,012 INFO L225 Difference]: With dead ends: 23 [2018-10-04 09:12:17,013 INFO L226 Difference]: Without dead ends: 15 [2018-10-04 09:12:17,016 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-04 09:12:17,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-04 09:12:17,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 13. [2018-10-04 09:12:17,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-04 09:12:17,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 17 transitions. [2018-10-04 09:12:17,054 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 17 transitions. Word has length 7 [2018-10-04 09:12:17,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:17,055 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 17 transitions. [2018-10-04 09:12:17,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-04 09:12:17,055 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 17 transitions. [2018-10-04 09:12:17,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-04 09:12:17,056 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:17,056 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-10-04 09:12:17,056 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:17,057 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:17,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1951989959, now seen corresponding path program 1 times [2018-10-04 09:12:17,057 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:17,057 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:17,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:17,058 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:12:17,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:17,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:17,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:17,129 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 09:12:17,129 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-04 09:12:17,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-04 09:12:17,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-04 09:12:17,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-04 09:12:17,132 INFO L87 Difference]: Start difference. First operand 13 states and 17 transitions. Second operand 4 states. [2018-10-04 09:12:17,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:17,194 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2018-10-04 09:12:17,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-04 09:12:17,195 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2018-10-04 09:12:17,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:17,195 INFO L225 Difference]: With dead ends: 20 [2018-10-04 09:12:17,195 INFO L226 Difference]: Without dead ends: 13 [2018-10-04 09:12:17,197 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-04 09:12:17,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-04 09:12:17,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-04 09:12:17,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-04 09:12:17,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2018-10-04 09:12:17,202 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 7 [2018-10-04 09:12:17,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:17,202 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2018-10-04 09:12:17,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-04 09:12:17,202 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2018-10-04 09:12:17,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-04 09:12:17,203 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:17,203 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-10-04 09:12:17,203 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:17,204 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:17,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1455783312, now seen corresponding path program 1 times [2018-10-04 09:12:17,204 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:17,204 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:17,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:17,206 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:12:17,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:17,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:17,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-10-04 09:12:17,277 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 09:12:17,277 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-04 09:12:17,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-04 09:12:17,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-04 09:12:17,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-04 09:12:17,278 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand 4 states. [2018-10-04 09:12:17,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:17,346 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2018-10-04 09:12:17,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 09:12:17,347 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-10-04 09:12:17,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:17,348 INFO L225 Difference]: With dead ends: 19 [2018-10-04 09:12:17,348 INFO L226 Difference]: Without dead ends: 17 [2018-10-04 09:12:17,349 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-04 09:12:17,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-04 09:12:17,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 13. [2018-10-04 09:12:17,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-04 09:12:17,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2018-10-04 09:12:17,356 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 8 [2018-10-04 09:12:17,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:17,357 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2018-10-04 09:12:17,357 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-04 09:12:17,357 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2018-10-04 09:12:17,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-04 09:12:17,358 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:17,358 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-10-04 09:12:17,359 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:17,359 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:17,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1455723730, now seen corresponding path program 1 times [2018-10-04 09:12:17,360 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:17,360 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:17,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:17,361 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:12:17,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:17,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:17,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:17,419 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 09:12:17,419 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-04 09:12:17,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-04 09:12:17,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-04 09:12:17,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-04 09:12:17,421 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 4 states. [2018-10-04 09:12:17,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:17,506 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2018-10-04 09:12:17,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-04 09:12:17,507 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-10-04 09:12:17,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:17,508 INFO L225 Difference]: With dead ends: 25 [2018-10-04 09:12:17,508 INFO L226 Difference]: Without dead ends: 19 [2018-10-04 09:12:17,509 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-04 09:12:17,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-04 09:12:17,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2018-10-04 09:12:17,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-04 09:12:17,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2018-10-04 09:12:17,514 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 8 [2018-10-04 09:12:17,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:17,515 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2018-10-04 09:12:17,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-04 09:12:17,515 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2018-10-04 09:12:17,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-04 09:12:17,516 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:17,516 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-04 09:12:17,516 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:17,516 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:17,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1394403420, now seen corresponding path program 1 times [2018-10-04 09:12:17,517 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:17,517 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:17,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:17,518 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:12:17,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:17,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:17,666 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:17,667 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:17,667 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:12:17,688 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:12:17,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:17,736 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:17,763 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:17,795 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:17,796 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-04 09:12:17,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-04 09:12:17,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-04 09:12:17,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-04 09:12:17,797 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 6 states. [2018-10-04 09:12:17,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:17,965 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2018-10-04 09:12:17,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 09:12:17,966 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2018-10-04 09:12:17,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:17,966 INFO L225 Difference]: With dead ends: 31 [2018-10-04 09:12:17,967 INFO L226 Difference]: Without dead ends: 16 [2018-10-04 09:12:17,967 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:12:17,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-04 09:12:17,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-04 09:12:17,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-04 09:12:17,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2018-10-04 09:12:17,975 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2018-10-04 09:12:17,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:17,976 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2018-10-04 09:12:17,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-04 09:12:17,976 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2018-10-04 09:12:17,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-04 09:12:17,977 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:17,977 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-10-04 09:12:17,977 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:17,978 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:17,978 INFO L82 PathProgramCache]: Analyzing trace with hash -961145443, now seen corresponding path program 2 times [2018-10-04 09:12:17,978 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:17,978 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:17,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:17,979 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:12:17,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:17,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:18,078 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:18,078 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:18,079 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:12:18,090 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:12:18,108 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:12:18,108 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:18,109 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:18,115 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:18,136 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:18,136 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-04 09:12:18,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-04 09:12:18,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-04 09:12:18,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-04 09:12:18,137 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 5 states. [2018-10-04 09:12:18,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:18,224 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2018-10-04 09:12:18,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 09:12:18,228 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-10-04 09:12:18,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:18,229 INFO L225 Difference]: With dead ends: 30 [2018-10-04 09:12:18,231 INFO L226 Difference]: Without dead ends: 24 [2018-10-04 09:12:18,231 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-04 09:12:18,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-04 09:12:18,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2018-10-04 09:12:18,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-04 09:12:18,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2018-10-04 09:12:18,243 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 13 [2018-10-04 09:12:18,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:18,243 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2018-10-04 09:12:18,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-04 09:12:18,244 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2018-10-04 09:12:18,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:12:18,244 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:18,245 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2018-10-04 09:12:18,246 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:18,246 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:18,246 INFO L82 PathProgramCache]: Analyzing trace with hash -552275309, now seen corresponding path program 3 times [2018-10-04 09:12:18,247 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:18,247 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:18,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:18,249 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:18,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:18,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:18,425 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:18,425 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:18,426 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:12:18,448 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:12:18,477 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-04 09:12:18,477 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:18,479 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:18,486 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:18,513 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:18,513 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 09:12:18,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 09:12:18,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 09:12:18,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:12:18,515 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 8 states. [2018-10-04 09:12:18,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:18,649 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2018-10-04 09:12:18,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 09:12:18,650 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2018-10-04 09:12:18,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:18,652 INFO L225 Difference]: With dead ends: 40 [2018-10-04 09:12:18,652 INFO L226 Difference]: Without dead ends: 21 [2018-10-04 09:12:18,653 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:12:18,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-04 09:12:18,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-04 09:12:18,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-04 09:12:18,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2018-10-04 09:12:18,661 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 17 [2018-10-04 09:12:18,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:18,661 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2018-10-04 09:12:18,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 09:12:18,662 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2018-10-04 09:12:18,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-04 09:12:18,662 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:18,662 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1] [2018-10-04 09:12:18,664 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:18,664 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:18,665 INFO L82 PathProgramCache]: Analyzing trace with hash 2071906362, now seen corresponding path program 4 times [2018-10-04 09:12:18,665 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:18,665 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:18,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:18,666 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:18,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:18,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:18,746 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:18,746 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:18,746 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:12:18,754 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:12:18,767 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:12:18,767 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:18,771 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:18,778 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:18,799 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:18,799 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-04 09:12:18,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-04 09:12:18,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-04 09:12:18,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-04 09:12:18,800 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 6 states. [2018-10-04 09:12:19,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:19,071 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2018-10-04 09:12:19,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 09:12:19,072 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2018-10-04 09:12:19,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:19,073 INFO L225 Difference]: With dead ends: 35 [2018-10-04 09:12:19,073 INFO L226 Difference]: Without dead ends: 29 [2018-10-04 09:12:19,074 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-04 09:12:19,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-04 09:12:19,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2018-10-04 09:12:19,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-04 09:12:19,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2018-10-04 09:12:19,081 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 18 [2018-10-04 09:12:19,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:19,081 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2018-10-04 09:12:19,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-04 09:12:19,082 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2018-10-04 09:12:19,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-04 09:12:19,083 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:19,083 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:12:19,083 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:19,083 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:19,084 INFO L82 PathProgramCache]: Analyzing trace with hash -992407888, now seen corresponding path program 5 times [2018-10-04 09:12:19,084 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:19,084 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:19,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:19,085 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:19,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:19,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:19,243 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:19,244 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:19,244 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:12:19,253 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:12:19,281 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-04 09:12:19,282 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:19,285 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:19,293 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:19,322 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:19,322 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:12:19,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:12:19,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:12:19,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:12:19,323 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 10 states. [2018-10-04 09:12:19,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:19,509 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2018-10-04 09:12:19,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:12:19,510 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2018-10-04 09:12:19,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:19,511 INFO L225 Difference]: With dead ends: 49 [2018-10-04 09:12:19,511 INFO L226 Difference]: Without dead ends: 26 [2018-10-04 09:12:19,511 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2018-10-04 09:12:19,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-04 09:12:19,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-10-04 09:12:19,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-04 09:12:19,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2018-10-04 09:12:19,517 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 22 [2018-10-04 09:12:19,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:19,518 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2018-10-04 09:12:19,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:12:19,518 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2018-10-04 09:12:19,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-04 09:12:19,519 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:19,519 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 09:12:19,519 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:19,519 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:19,520 INFO L82 PathProgramCache]: Analyzing trace with hash 390441321, now seen corresponding path program 6 times [2018-10-04 09:12:19,520 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:19,520 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:19,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:19,521 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:19,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:19,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:19,764 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:19,764 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:19,764 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:12:19,779 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:12:19,822 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-10-04 09:12:19,822 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:19,825 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:19,833 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:19,854 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:19,854 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-04 09:12:19,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-04 09:12:19,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-04 09:12:19,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-04 09:12:19,855 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 7 states. [2018-10-04 09:12:19,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:19,965 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2018-10-04 09:12:19,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 09:12:19,966 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2018-10-04 09:12:19,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:19,967 INFO L225 Difference]: With dead ends: 40 [2018-10-04 09:12:19,967 INFO L226 Difference]: Without dead ends: 34 [2018-10-04 09:12:19,968 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-04 09:12:19,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-04 09:12:19,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2018-10-04 09:12:19,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:12:19,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2018-10-04 09:12:19,975 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 23 [2018-10-04 09:12:19,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:19,975 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2018-10-04 09:12:19,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-04 09:12:19,975 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2018-10-04 09:12:19,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-04 09:12:19,976 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:19,976 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1] [2018-10-04 09:12:19,977 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:19,977 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:19,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1927135327, now seen corresponding path program 7 times [2018-10-04 09:12:19,977 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:19,977 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:19,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:19,978 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:19,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:19,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:20,132 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 40 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:20,132 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:20,133 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:12:20,142 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:12:20,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:20,166 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:20,176 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 40 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:20,197 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:20,197 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-04 09:12:20,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-04 09:12:20,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-04 09:12:20,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2018-10-04 09:12:20,199 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 12 states. [2018-10-04 09:12:20,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:20,448 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2018-10-04 09:12:20,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-04 09:12:20,448 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2018-10-04 09:12:20,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:20,449 INFO L225 Difference]: With dead ends: 58 [2018-10-04 09:12:20,450 INFO L226 Difference]: Without dead ends: 31 [2018-10-04 09:12:20,450 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2018-10-04 09:12:20,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-04 09:12:20,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-04 09:12:20,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-04 09:12:20,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2018-10-04 09:12:20,457 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 27 [2018-10-04 09:12:20,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:20,457 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2018-10-04 09:12:20,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-04 09:12:20,458 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2018-10-04 09:12:20,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-04 09:12:20,459 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:20,459 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1] [2018-10-04 09:12:20,459 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:20,459 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:20,459 INFO L82 PathProgramCache]: Analyzing trace with hash -906890938, now seen corresponding path program 8 times [2018-10-04 09:12:20,460 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:20,460 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:20,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:20,461 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:12:20,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:20,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:20,562 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 23 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:20,563 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:20,563 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) [2018-10-04 09:12:20,579 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:12:20,609 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:12:20,609 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:20,611 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:20,621 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 23 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:20,650 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:20,651 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 09:12:20,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 09:12:20,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 09:12:20,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:12:20,652 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 8 states. [2018-10-04 09:12:20,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:20,762 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2018-10-04 09:12:20,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 09:12:20,763 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2018-10-04 09:12:20,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:20,763 INFO L225 Difference]: With dead ends: 45 [2018-10-04 09:12:20,763 INFO L226 Difference]: Without dead ends: 39 [2018-10-04 09:12:20,764 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:12:20,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-04 09:12:20,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2018-10-04 09:12:20,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-04 09:12:20,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2018-10-04 09:12:20,773 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 28 [2018-10-04 09:12:20,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:20,773 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2018-10-04 09:12:20,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 09:12:20,773 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2018-10-04 09:12:20,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-04 09:12:20,774 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:20,774 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1] [2018-10-04 09:12:20,775 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:20,775 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:20,775 INFO L82 PathProgramCache]: Analyzing trace with hash -466038340, now seen corresponding path program 9 times [2018-10-04 09:12:20,775 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:20,776 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:20,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:20,777 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:20,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:20,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:20,952 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 60 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:20,953 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:20,953 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:12:20,963 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:12:21,061 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-04 09:12:21,061 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:21,064 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:21,075 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 60 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:21,109 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:21,110 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-04 09:12:21,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 09:12:21,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 09:12:21,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2018-10-04 09:12:21,111 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 14 states. [2018-10-04 09:12:21,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:21,789 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2018-10-04 09:12:21,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-04 09:12:21,789 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 32 [2018-10-04 09:12:21,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:21,790 INFO L225 Difference]: With dead ends: 67 [2018-10-04 09:12:21,790 INFO L226 Difference]: Without dead ends: 36 [2018-10-04 09:12:21,791 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2018-10-04 09:12:21,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-04 09:12:21,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-10-04 09:12:21,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-04 09:12:21,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2018-10-04 09:12:21,798 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 32 [2018-10-04 09:12:21,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:21,799 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2018-10-04 09:12:21,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 09:12:21,799 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2018-10-04 09:12:21,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-04 09:12:21,800 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:21,800 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 1, 1, 1, 1, 1] [2018-10-04 09:12:21,800 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:21,800 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:21,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1282545973, now seen corresponding path program 10 times [2018-10-04 09:12:21,801 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:21,801 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:21,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:21,802 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:21,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:21,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:21,896 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 31 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:21,896 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:21,896 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:12:21,904 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:12:21,924 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:12:21,924 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:21,926 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:21,936 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 31 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:21,966 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:21,967 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:12:21,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:12:21,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:12:21,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:12:21,968 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 9 states. [2018-10-04 09:12:22,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:22,248 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2018-10-04 09:12:22,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:12:22,248 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2018-10-04 09:12:22,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:22,250 INFO L225 Difference]: With dead ends: 50 [2018-10-04 09:12:22,250 INFO L226 Difference]: Without dead ends: 44 [2018-10-04 09:12:22,251 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-04 09:12:22,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-04 09:12:22,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2018-10-04 09:12:22,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-04 09:12:22,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2018-10-04 09:12:22,259 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 33 [2018-10-04 09:12:22,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:22,259 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2018-10-04 09:12:22,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:12:22,260 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2018-10-04 09:12:22,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-04 09:12:22,261 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:22,261 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1] [2018-10-04 09:12:22,261 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:22,262 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:22,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1500867115, now seen corresponding path program 11 times [2018-10-04 09:12:22,262 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:22,262 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:22,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:22,263 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:22,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:22,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:22,449 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 84 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:22,449 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:22,449 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:12:22,457 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:12:22,482 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-04 09:12:22,483 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:22,487 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:22,499 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 84 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:22,521 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:22,521 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-04 09:12:22,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-04 09:12:22,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-04 09:12:22,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2018-10-04 09:12:22,522 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 16 states. [2018-10-04 09:12:22,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:22,756 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2018-10-04 09:12:22,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-04 09:12:22,757 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 37 [2018-10-04 09:12:22,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:22,757 INFO L225 Difference]: With dead ends: 76 [2018-10-04 09:12:22,757 INFO L226 Difference]: Without dead ends: 41 [2018-10-04 09:12:22,758 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=365, Unknown=0, NotChecked=0, Total=506 [2018-10-04 09:12:22,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-04 09:12:22,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-04 09:12:22,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-04 09:12:22,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2018-10-04 09:12:22,765 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 37 [2018-10-04 09:12:22,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:22,765 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2018-10-04 09:12:22,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-04 09:12:22,766 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2018-10-04 09:12:22,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-04 09:12:22,767 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:22,767 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 1, 1, 1, 1, 1] [2018-10-04 09:12:22,767 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:22,767 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:22,767 INFO L82 PathProgramCache]: Analyzing trace with hash 594208338, now seen corresponding path program 12 times [2018-10-04 09:12:22,768 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:22,768 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:22,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:22,769 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:22,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:22,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:22,947 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 40 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:22,948 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:22,948 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:12:22,957 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:12:22,976 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-04 09:12:22,976 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:22,979 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:22,990 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 40 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:23,013 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:23,014 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:12:23,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:12:23,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:12:23,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:12:23,014 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 10 states. [2018-10-04 09:12:23,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:23,174 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2018-10-04 09:12:23,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:12:23,174 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2018-10-04 09:12:23,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:23,175 INFO L225 Difference]: With dead ends: 55 [2018-10-04 09:12:23,175 INFO L226 Difference]: Without dead ends: 49 [2018-10-04 09:12:23,175 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:12:23,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-04 09:12:23,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2018-10-04 09:12:23,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-04 09:12:23,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2018-10-04 09:12:23,184 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 38 [2018-10-04 09:12:23,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:23,184 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2018-10-04 09:12:23,184 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:12:23,185 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2018-10-04 09:12:23,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-04 09:12:23,186 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:23,186 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 1, 1, 1, 1, 1] [2018-10-04 09:12:23,186 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:23,186 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:23,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1054367944, now seen corresponding path program 13 times [2018-10-04 09:12:23,187 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:23,187 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:23,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:23,188 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:23,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:23,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:23,420 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 112 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:23,420 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:23,420 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:12:23,428 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:12:23,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:23,451 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:23,461 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 112 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:23,484 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:23,484 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-04 09:12:23,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-04 09:12:23,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-04 09:12:23,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2018-10-04 09:12:23,485 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 18 states. [2018-10-04 09:12:24,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:24,045 INFO L93 Difference]: Finished difference Result 85 states and 89 transitions. [2018-10-04 09:12:24,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-04 09:12:24,045 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 42 [2018-10-04 09:12:24,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:24,046 INFO L225 Difference]: With dead ends: 85 [2018-10-04 09:12:24,046 INFO L226 Difference]: Without dead ends: 46 [2018-10-04 09:12:24,047 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2018-10-04 09:12:24,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-04 09:12:24,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-10-04 09:12:24,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-04 09:12:24,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2018-10-04 09:12:24,055 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 42 [2018-10-04 09:12:24,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:24,056 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2018-10-04 09:12:24,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-04 09:12:24,056 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2018-10-04 09:12:24,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-04 09:12:24,057 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:24,057 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 1, 1, 1, 1, 1] [2018-10-04 09:12:24,057 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:24,057 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:24,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1098736897, now seen corresponding path program 14 times [2018-10-04 09:12:24,058 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:24,058 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:24,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:24,059 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:12:24,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:24,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:24,174 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 50 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:24,174 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:24,174 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:12:24,185 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:12:24,220 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:12:24,220 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:24,223 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:24,251 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 50 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:24,281 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:24,281 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:12:24,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:12:24,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:12:24,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:12:24,282 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 11 states. [2018-10-04 09:12:24,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:24,400 INFO L93 Difference]: Finished difference Result 60 states and 63 transitions. [2018-10-04 09:12:24,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:12:24,401 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2018-10-04 09:12:24,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:24,401 INFO L225 Difference]: With dead ends: 60 [2018-10-04 09:12:24,401 INFO L226 Difference]: Without dead ends: 54 [2018-10-04 09:12:24,402 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-04 09:12:24,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-04 09:12:24,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2018-10-04 09:12:24,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-04 09:12:24,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2018-10-04 09:12:24,410 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 43 [2018-10-04 09:12:24,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:24,410 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2018-10-04 09:12:24,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:12:24,410 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2018-10-04 09:12:24,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-04 09:12:24,411 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:24,411 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 1, 1, 1, 1, 1] [2018-10-04 09:12:24,412 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:24,412 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:24,412 INFO L82 PathProgramCache]: Analyzing trace with hash -48369673, now seen corresponding path program 15 times [2018-10-04 09:12:24,412 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:24,412 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:24,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:24,413 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:24,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:24,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:24,709 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 144 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:24,710 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:24,710 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:12:24,717 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:12:24,745 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-04 09:12:24,745 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:24,749 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:24,760 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 144 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:24,786 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:24,786 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-04 09:12:24,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 09:12:24,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 09:12:24,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2018-10-04 09:12:24,788 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 20 states. [2018-10-04 09:12:25,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:25,551 INFO L93 Difference]: Finished difference Result 94 states and 98 transitions. [2018-10-04 09:12:25,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-04 09:12:25,552 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 47 [2018-10-04 09:12:25,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:25,552 INFO L225 Difference]: With dead ends: 94 [2018-10-04 09:12:25,552 INFO L226 Difference]: Without dead ends: 51 [2018-10-04 09:12:25,553 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=217, Invalid=595, Unknown=0, NotChecked=0, Total=812 [2018-10-04 09:12:25,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-04 09:12:25,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-04 09:12:25,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-04 09:12:25,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2018-10-04 09:12:25,561 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 47 [2018-10-04 09:12:25,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:25,562 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2018-10-04 09:12:25,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 09:12:25,562 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2018-10-04 09:12:25,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-04 09:12:25,563 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:25,563 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 1, 1, 1, 1, 1] [2018-10-04 09:12:25,563 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:25,564 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:25,564 INFO L82 PathProgramCache]: Analyzing trace with hash 239052638, now seen corresponding path program 16 times [2018-10-04 09:12:25,564 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:25,564 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:25,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:25,565 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:25,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:25,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:25,728 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 61 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:25,729 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:25,729 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:12:25,742 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:12:25,768 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:12:25,768 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:25,770 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:25,784 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 61 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:25,809 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:25,809 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-04 09:12:25,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-04 09:12:25,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-04 09:12:25,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-04 09:12:25,811 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 12 states. [2018-10-04 09:12:25,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:25,916 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2018-10-04 09:12:25,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-04 09:12:25,918 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2018-10-04 09:12:25,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:25,919 INFO L225 Difference]: With dead ends: 65 [2018-10-04 09:12:25,919 INFO L226 Difference]: Without dead ends: 59 [2018-10-04 09:12:25,920 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-04 09:12:25,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-04 09:12:25,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2018-10-04 09:12:25,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-04 09:12:25,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2018-10-04 09:12:25,929 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 48 [2018-10-04 09:12:25,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:25,929 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2018-10-04 09:12:25,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-04 09:12:25,929 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2018-10-04 09:12:25,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-04 09:12:25,930 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:25,930 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 1, 1, 1, 1, 1] [2018-10-04 09:12:25,931 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:25,931 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:25,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1074641876, now seen corresponding path program 17 times [2018-10-04 09:12:25,931 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:25,931 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:25,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:25,932 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:25,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:25,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:26,207 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 180 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:26,207 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:26,207 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:12:26,216 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:12:26,247 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-04 09:12:26,248 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:26,252 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:26,264 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 180 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:26,287 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:26,287 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-04 09:12:26,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-04 09:12:26,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-04 09:12:26,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2018-10-04 09:12:26,289 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 22 states. [2018-10-04 09:12:27,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:27,146 INFO L93 Difference]: Finished difference Result 103 states and 107 transitions. [2018-10-04 09:12:27,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-04 09:12:27,146 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2018-10-04 09:12:27,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:27,147 INFO L225 Difference]: With dead ends: 103 [2018-10-04 09:12:27,147 INFO L226 Difference]: Without dead ends: 56 [2018-10-04 09:12:27,148 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=261, Invalid=731, Unknown=0, NotChecked=0, Total=992 [2018-10-04 09:12:27,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-04 09:12:27,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-10-04 09:12:27,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-04 09:12:27,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2018-10-04 09:12:27,155 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 52 [2018-10-04 09:12:27,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:27,155 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2018-10-04 09:12:27,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-04 09:12:27,155 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2018-10-04 09:12:27,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-04 09:12:27,156 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:27,156 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 1, 1, 1, 1, 1] [2018-10-04 09:12:27,156 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:27,156 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:27,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1305899827, now seen corresponding path program 18 times [2018-10-04 09:12:27,157 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:27,157 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:27,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:27,158 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:27,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:27,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:27,294 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 73 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:27,294 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:27,294 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:12:27,302 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:12:27,337 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-04 09:12:27,337 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:27,341 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:27,352 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 73 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:27,374 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:27,375 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-04 09:12:27,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-04 09:12:27,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-04 09:12:27,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-04 09:12:27,375 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 13 states. [2018-10-04 09:12:27,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:27,443 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2018-10-04 09:12:27,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-04 09:12:27,444 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 53 [2018-10-04 09:12:27,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:27,445 INFO L225 Difference]: With dead ends: 70 [2018-10-04 09:12:27,445 INFO L226 Difference]: Without dead ends: 64 [2018-10-04 09:12:27,446 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-04 09:12:27,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-10-04 09:12:27,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 60. [2018-10-04 09:12:27,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-04 09:12:27,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2018-10-04 09:12:27,454 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 53 [2018-10-04 09:12:27,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:27,455 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2018-10-04 09:12:27,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-04 09:12:27,455 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2018-10-04 09:12:27,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-04 09:12:27,455 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:27,456 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 1, 1, 1, 1, 1] [2018-10-04 09:12:27,456 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:27,456 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:27,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1754878403, now seen corresponding path program 19 times [2018-10-04 09:12:27,457 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:27,457 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:27,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:27,458 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:27,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:27,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:27,777 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 220 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:27,777 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:27,777 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:12:27,786 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:12:27,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:27,818 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:27,834 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 220 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:27,864 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:27,865 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-04 09:12:27,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-04 09:12:27,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-04 09:12:27,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2018-10-04 09:12:27,866 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 24 states. [2018-10-04 09:12:28,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:28,298 INFO L93 Difference]: Finished difference Result 112 states and 116 transitions. [2018-10-04 09:12:28,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-04 09:12:28,299 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 57 [2018-10-04 09:12:28,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:28,299 INFO L225 Difference]: With dead ends: 112 [2018-10-04 09:12:28,299 INFO L226 Difference]: Without dead ends: 61 [2018-10-04 09:12:28,300 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=309, Invalid=881, Unknown=0, NotChecked=0, Total=1190 [2018-10-04 09:12:28,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-04 09:12:28,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-04 09:12:28,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-04 09:12:28,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2018-10-04 09:12:28,308 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 57 [2018-10-04 09:12:28,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:28,308 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2018-10-04 09:12:28,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-04 09:12:28,309 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2018-10-04 09:12:28,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-04 09:12:28,309 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:28,310 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 1, 1, 1, 1, 1] [2018-10-04 09:12:28,310 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:28,310 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:28,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1471794070, now seen corresponding path program 20 times [2018-10-04 09:12:28,310 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:28,310 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:28,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:28,328 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:12:28,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:28,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:28,664 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 86 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:28,665 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:28,665 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:12:28,672 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:12:28,712 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:12:28,712 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:28,714 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:28,737 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 86 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:28,766 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:28,766 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-04 09:12:28,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 09:12:28,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 09:12:28,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-04 09:12:28,767 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 14 states. [2018-10-04 09:12:28,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:28,867 INFO L93 Difference]: Finished difference Result 75 states and 78 transitions. [2018-10-04 09:12:28,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-04 09:12:28,867 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 58 [2018-10-04 09:12:28,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:28,868 INFO L225 Difference]: With dead ends: 75 [2018-10-04 09:12:28,868 INFO L226 Difference]: Without dead ends: 69 [2018-10-04 09:12:28,868 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-04 09:12:28,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-04 09:12:28,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 65. [2018-10-04 09:12:28,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-04 09:12:28,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2018-10-04 09:12:28,875 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 58 [2018-10-04 09:12:28,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:28,876 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2018-10-04 09:12:28,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 09:12:28,876 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2018-10-04 09:12:28,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-04 09:12:28,877 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:28,877 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 1, 1, 1, 1, 1] [2018-10-04 09:12:28,877 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:28,877 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:28,877 INFO L82 PathProgramCache]: Analyzing trace with hash 716104416, now seen corresponding path program 21 times [2018-10-04 09:12:28,878 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:28,878 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:28,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:28,878 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:28,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:28,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:29,428 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 264 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:29,429 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:29,429 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:12:29,441 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:12:29,477 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-04 09:12:29,477 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:29,480 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:29,492 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 264 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:29,521 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:29,521 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-04 09:12:29,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-04 09:12:29,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-04 09:12:29,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2018-10-04 09:12:29,522 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 26 states. [2018-10-04 09:12:29,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:29,945 INFO L93 Difference]: Finished difference Result 121 states and 125 transitions. [2018-10-04 09:12:29,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-04 09:12:29,945 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 62 [2018-10-04 09:12:29,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:29,946 INFO L225 Difference]: With dead ends: 121 [2018-10-04 09:12:29,946 INFO L226 Difference]: Without dead ends: 66 [2018-10-04 09:12:29,948 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=361, Invalid=1045, Unknown=0, NotChecked=0, Total=1406 [2018-10-04 09:12:29,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-04 09:12:29,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-10-04 09:12:29,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-04 09:12:29,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2018-10-04 09:12:29,954 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 62 [2018-10-04 09:12:29,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:29,954 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2018-10-04 09:12:29,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-04 09:12:29,955 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2018-10-04 09:12:29,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-04 09:12:29,955 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:29,955 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 1, 1, 1, 1, 1] [2018-10-04 09:12:29,956 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:29,956 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:29,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1699180391, now seen corresponding path program 22 times [2018-10-04 09:12:29,956 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:29,956 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:29,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:29,957 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:29,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:29,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:31,057 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 100 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:31,058 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:31,058 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:12:31,071 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:12:31,120 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:12:31,120 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:31,123 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:31,137 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 100 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:31,166 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:31,166 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-04 09:12:31,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-04 09:12:31,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-04 09:12:31,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-04 09:12:31,167 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 15 states. [2018-10-04 09:12:31,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:31,251 INFO L93 Difference]: Finished difference Result 80 states and 83 transitions. [2018-10-04 09:12:31,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-04 09:12:31,252 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 63 [2018-10-04 09:12:31,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:31,253 INFO L225 Difference]: With dead ends: 80 [2018-10-04 09:12:31,253 INFO L226 Difference]: Without dead ends: 74 [2018-10-04 09:12:31,253 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-04 09:12:31,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-04 09:12:31,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 70. [2018-10-04 09:12:31,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-04 09:12:31,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2018-10-04 09:12:31,262 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 63 [2018-10-04 09:12:31,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:31,262 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2018-10-04 09:12:31,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-04 09:12:31,262 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2018-10-04 09:12:31,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-04 09:12:31,263 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:31,263 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 1, 1, 1, 1, 1] [2018-10-04 09:12:31,263 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:31,264 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:31,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1490448497, now seen corresponding path program 23 times [2018-10-04 09:12:31,264 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:31,264 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:31,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:31,265 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:31,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:31,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:31,923 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 312 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:31,923 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:31,923 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:12:31,931 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:12:31,970 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-04 09:12:31,970 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:31,973 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:31,986 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 312 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:32,007 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:32,008 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-04 09:12:32,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-04 09:12:32,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-04 09:12:32,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2018-10-04 09:12:32,009 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 28 states. [2018-10-04 09:12:32,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:32,473 INFO L93 Difference]: Finished difference Result 130 states and 134 transitions. [2018-10-04 09:12:32,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-04 09:12:32,473 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 67 [2018-10-04 09:12:32,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:32,474 INFO L225 Difference]: With dead ends: 130 [2018-10-04 09:12:32,474 INFO L226 Difference]: Without dead ends: 71 [2018-10-04 09:12:32,475 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=417, Invalid=1223, Unknown=0, NotChecked=0, Total=1640 [2018-10-04 09:12:32,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-04 09:12:32,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-10-04 09:12:32,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-04 09:12:32,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2018-10-04 09:12:32,483 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 67 [2018-10-04 09:12:32,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:32,483 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2018-10-04 09:12:32,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-04 09:12:32,483 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2018-10-04 09:12:32,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-04 09:12:32,484 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:32,484 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 1, 1, 1, 1, 1] [2018-10-04 09:12:32,484 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:32,485 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:32,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1188334966, now seen corresponding path program 24 times [2018-10-04 09:12:32,485 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:32,485 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:32,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:32,486 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:32,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:32,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:32,795 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 115 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:32,795 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:32,796 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:12:32,807 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:12:32,848 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-04 09:12:32,848 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:32,850 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:32,862 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 115 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:32,889 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:32,889 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-04 09:12:32,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-04 09:12:32,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-04 09:12:32,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-04 09:12:32,890 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 16 states. [2018-10-04 09:12:33,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:33,006 INFO L93 Difference]: Finished difference Result 85 states and 88 transitions. [2018-10-04 09:12:33,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-04 09:12:33,006 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 68 [2018-10-04 09:12:33,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:33,007 INFO L225 Difference]: With dead ends: 85 [2018-10-04 09:12:33,007 INFO L226 Difference]: Without dead ends: 79 [2018-10-04 09:12:33,007 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-04 09:12:33,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-04 09:12:33,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 75. [2018-10-04 09:12:33,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-04 09:12:33,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2018-10-04 09:12:33,014 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 68 [2018-10-04 09:12:33,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:33,015 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2018-10-04 09:12:33,015 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-04 09:12:33,015 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2018-10-04 09:12:33,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-04 09:12:33,016 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:33,016 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 1, 1, 1, 1, 1] [2018-10-04 09:12:33,016 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:33,016 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:33,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1190013460, now seen corresponding path program 25 times [2018-10-04 09:12:33,016 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:33,017 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:33,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:33,017 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:33,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:33,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:33,452 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 364 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:33,452 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:33,452 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:12:33,461 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:12:33,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:33,497 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:33,511 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 364 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:33,532 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:33,532 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-04 09:12:33,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-04 09:12:33,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-04 09:12:33,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2018-10-04 09:12:33,533 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand 30 states. [2018-10-04 09:12:34,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:34,347 INFO L93 Difference]: Finished difference Result 139 states and 143 transitions. [2018-10-04 09:12:34,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-04 09:12:34,347 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 72 [2018-10-04 09:12:34,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:34,348 INFO L225 Difference]: With dead ends: 139 [2018-10-04 09:12:34,348 INFO L226 Difference]: Without dead ends: 76 [2018-10-04 09:12:34,349 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=477, Invalid=1415, Unknown=0, NotChecked=0, Total=1892 [2018-10-04 09:12:34,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-10-04 09:12:34,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-10-04 09:12:34,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-04 09:12:34,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2018-10-04 09:12:34,358 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 72 [2018-10-04 09:12:34,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:34,358 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2018-10-04 09:12:34,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-04 09:12:34,359 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2018-10-04 09:12:34,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-10-04 09:12:34,359 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:34,359 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 1, 1, 1, 1, 1] [2018-10-04 09:12:34,360 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:34,360 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:34,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1746112411, now seen corresponding path program 26 times [2018-10-04 09:12:34,360 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:34,360 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:34,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:34,361 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:12:34,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:34,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:34,896 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 131 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:34,897 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:34,897 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:12:34,922 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:12:34,959 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:12:34,959 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:34,961 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:34,972 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 131 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:34,992 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:34,993 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-04 09:12:34,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-04 09:12:34,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-04 09:12:34,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-04 09:12:34,994 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 17 states. [2018-10-04 09:12:35,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:35,082 INFO L93 Difference]: Finished difference Result 90 states and 93 transitions. [2018-10-04 09:12:35,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-04 09:12:35,082 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 73 [2018-10-04 09:12:35,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:35,083 INFO L225 Difference]: With dead ends: 90 [2018-10-04 09:12:35,083 INFO L226 Difference]: Without dead ends: 84 [2018-10-04 09:12:35,084 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-04 09:12:35,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-10-04 09:12:35,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2018-10-04 09:12:35,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-04 09:12:35,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2018-10-04 09:12:35,091 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 73 [2018-10-04 09:12:35,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:35,092 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2018-10-04 09:12:35,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-04 09:12:35,092 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2018-10-04 09:12:35,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-10-04 09:12:35,092 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:35,093 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 1, 1, 1, 1, 1] [2018-10-04 09:12:35,093 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:35,093 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:35,093 INFO L82 PathProgramCache]: Analyzing trace with hash 613460315, now seen corresponding path program 27 times [2018-10-04 09:12:35,093 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:35,094 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:35,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:35,094 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:35,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:35,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:35,522 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 420 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:35,522 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:35,522 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:12:35,531 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:12:35,582 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-04 09:12:35,582 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:35,585 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:35,600 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 420 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:35,629 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:35,630 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-04 09:12:35,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-04 09:12:35,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-04 09:12:35,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=721, Unknown=0, NotChecked=0, Total=992 [2018-10-04 09:12:35,631 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 32 states. [2018-10-04 09:12:36,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:36,245 INFO L93 Difference]: Finished difference Result 148 states and 152 transitions. [2018-10-04 09:12:36,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-04 09:12:36,246 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 77 [2018-10-04 09:12:36,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:36,246 INFO L225 Difference]: With dead ends: 148 [2018-10-04 09:12:36,246 INFO L226 Difference]: Without dead ends: 81 [2018-10-04 09:12:36,247 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=541, Invalid=1621, Unknown=0, NotChecked=0, Total=2162 [2018-10-04 09:12:36,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-04 09:12:36,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-10-04 09:12:36,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-10-04 09:12:36,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2018-10-04 09:12:36,253 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 77 [2018-10-04 09:12:36,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:36,253 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2018-10-04 09:12:36,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-04 09:12:36,253 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2018-10-04 09:12:36,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-04 09:12:36,253 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:36,254 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 1, 1, 1, 1, 1] [2018-10-04 09:12:36,254 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:36,254 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:36,254 INFO L82 PathProgramCache]: Analyzing trace with hash 381727362, now seen corresponding path program 28 times [2018-10-04 09:12:36,254 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:36,254 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:36,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:36,255 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:36,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:36,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:36,455 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 148 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:36,455 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:36,455 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:12:36,464 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:12:36,500 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:12:36,501 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:36,503 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:36,514 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 148 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:36,534 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:36,535 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-04 09:12:36,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-04 09:12:36,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-04 09:12:36,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-04 09:12:36,535 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 18 states. [2018-10-04 09:12:36,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:36,621 INFO L93 Difference]: Finished difference Result 95 states and 98 transitions. [2018-10-04 09:12:36,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-04 09:12:36,621 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 78 [2018-10-04 09:12:36,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:36,623 INFO L225 Difference]: With dead ends: 95 [2018-10-04 09:12:36,623 INFO L226 Difference]: Without dead ends: 89 [2018-10-04 09:12:36,623 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-04 09:12:36,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-04 09:12:36,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 85. [2018-10-04 09:12:36,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-04 09:12:36,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2018-10-04 09:12:36,632 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 78 [2018-10-04 09:12:36,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:36,633 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2018-10-04 09:12:36,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-04 09:12:36,633 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2018-10-04 09:12:36,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-04 09:12:36,633 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:36,634 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 1, 1, 1, 1, 1] [2018-10-04 09:12:36,634 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:36,634 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:36,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1123248904, now seen corresponding path program 29 times [2018-10-04 09:12:36,634 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:36,634 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:36,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:36,635 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:36,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:36,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:37,721 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 480 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:37,722 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:37,722 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:12:37,729 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:12:37,872 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-10-04 09:12:37,873 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:37,875 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:37,889 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 480 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:37,909 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:37,910 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-04 09:12:37,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-04 09:12:37,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-04 09:12:37,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2018-10-04 09:12:37,911 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 34 states. [2018-10-04 09:12:38,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:38,626 INFO L93 Difference]: Finished difference Result 157 states and 161 transitions. [2018-10-04 09:12:38,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-04 09:12:38,626 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 82 [2018-10-04 09:12:38,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:38,627 INFO L225 Difference]: With dead ends: 157 [2018-10-04 09:12:38,627 INFO L226 Difference]: Without dead ends: 86 [2018-10-04 09:12:38,628 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=609, Invalid=1841, Unknown=0, NotChecked=0, Total=2450 [2018-10-04 09:12:38,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-04 09:12:38,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-10-04 09:12:38,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-10-04 09:12:38,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2018-10-04 09:12:38,637 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 82 [2018-10-04 09:12:38,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:38,637 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2018-10-04 09:12:38,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-04 09:12:38,637 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2018-10-04 09:12:38,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-04 09:12:38,638 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:38,638 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 1, 1, 1, 1, 1] [2018-10-04 09:12:38,638 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:38,639 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:38,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1191652401, now seen corresponding path program 30 times [2018-10-04 09:12:38,639 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:38,639 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:38,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:38,640 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:38,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:38,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:38,974 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 166 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:38,974 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:38,974 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:12:38,983 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:12:39,033 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-10-04 09:12:39,034 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:39,037 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:39,050 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 166 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:39,070 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:39,071 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-04 09:12:39,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-04 09:12:39,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-04 09:12:39,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-04 09:12:39,071 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 19 states. [2018-10-04 09:12:39,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:39,173 INFO L93 Difference]: Finished difference Result 100 states and 103 transitions. [2018-10-04 09:12:39,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-04 09:12:39,173 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 83 [2018-10-04 09:12:39,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:39,174 INFO L225 Difference]: With dead ends: 100 [2018-10-04 09:12:39,174 INFO L226 Difference]: Without dead ends: 94 [2018-10-04 09:12:39,175 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-04 09:12:39,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-10-04 09:12:39,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2018-10-04 09:12:39,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-10-04 09:12:39,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2018-10-04 09:12:39,181 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 83 [2018-10-04 09:12:39,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:39,181 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2018-10-04 09:12:39,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-04 09:12:39,181 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2018-10-04 09:12:39,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-04 09:12:39,182 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:39,182 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 1, 1, 1, 1, 1] [2018-10-04 09:12:39,182 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:39,182 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:39,182 INFO L82 PathProgramCache]: Analyzing trace with hash 219193127, now seen corresponding path program 31 times [2018-10-04 09:12:39,182 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:39,182 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:39,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:39,183 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:39,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:39,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:40,125 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 544 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:40,125 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:40,125 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:12:40,133 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:12:40,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:40,185 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:40,208 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 544 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:40,231 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:40,232 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-04 09:12:40,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-04 09:12:40,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-04 09:12:40,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=919, Unknown=0, NotChecked=0, Total=1260 [2018-10-04 09:12:40,233 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 36 states. [2018-10-04 09:12:40,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:40,931 INFO L93 Difference]: Finished difference Result 166 states and 170 transitions. [2018-10-04 09:12:40,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-04 09:12:40,931 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 87 [2018-10-04 09:12:40,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:40,931 INFO L225 Difference]: With dead ends: 166 [2018-10-04 09:12:40,932 INFO L226 Difference]: Without dead ends: 91 [2018-10-04 09:12:40,932 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=681, Invalid=2075, Unknown=0, NotChecked=0, Total=2756 [2018-10-04 09:12:40,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-04 09:12:40,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-10-04 09:12:40,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-04 09:12:40,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2018-10-04 09:12:40,941 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 87 [2018-10-04 09:12:40,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:40,942 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2018-10-04 09:12:40,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-04 09:12:40,942 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2018-10-04 09:12:40,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-04 09:12:40,942 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:40,943 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 1, 1, 1, 1, 1] [2018-10-04 09:12:40,943 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:40,943 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:40,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1134517362, now seen corresponding path program 32 times [2018-10-04 09:12:40,943 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:40,943 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:40,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:40,944 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:12:40,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:40,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:41,334 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 185 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:41,334 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:41,334 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:12:41,341 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:12:41,387 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:12:41,387 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:41,389 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:41,404 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 185 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:41,425 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:41,426 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-04 09:12:41,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 09:12:41,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 09:12:41,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-04 09:12:41,426 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand 20 states. [2018-10-04 09:12:41,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:41,533 INFO L93 Difference]: Finished difference Result 105 states and 108 transitions. [2018-10-04 09:12:41,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-04 09:12:41,534 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 88 [2018-10-04 09:12:41,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:41,535 INFO L225 Difference]: With dead ends: 105 [2018-10-04 09:12:41,535 INFO L226 Difference]: Without dead ends: 99 [2018-10-04 09:12:41,536 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-04 09:12:41,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-04 09:12:41,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2018-10-04 09:12:41,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-04 09:12:41,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2018-10-04 09:12:41,546 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 88 [2018-10-04 09:12:41,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:41,547 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2018-10-04 09:12:41,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 09:12:41,547 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2018-10-04 09:12:41,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-04 09:12:41,547 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:41,547 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 1, 1, 1, 1, 1] [2018-10-04 09:12:41,548 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:41,548 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:41,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1074454524, now seen corresponding path program 33 times [2018-10-04 09:12:41,548 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:41,548 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:41,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:41,549 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:41,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:41,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:42,334 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 612 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:42,334 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:42,335 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:12:42,343 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:12:42,405 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-04 09:12:42,405 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:42,408 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:42,422 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 612 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:42,442 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:42,442 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-04 09:12:42,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-04 09:12:42,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-04 09:12:42,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=1027, Unknown=0, NotChecked=0, Total=1406 [2018-10-04 09:12:42,443 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand 38 states. [2018-10-04 09:12:43,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:43,677 INFO L93 Difference]: Finished difference Result 175 states and 179 transitions. [2018-10-04 09:12:43,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-04 09:12:43,677 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 92 [2018-10-04 09:12:43,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:43,678 INFO L225 Difference]: With dead ends: 175 [2018-10-04 09:12:43,678 INFO L226 Difference]: Without dead ends: 96 [2018-10-04 09:12:43,679 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=757, Invalid=2323, Unknown=0, NotChecked=0, Total=3080 [2018-10-04 09:12:43,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-10-04 09:12:43,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-10-04 09:12:43,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-10-04 09:12:43,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2018-10-04 09:12:43,686 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 92 [2018-10-04 09:12:43,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:43,686 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2018-10-04 09:12:43,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-04 09:12:43,686 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2018-10-04 09:12:43,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-10-04 09:12:43,687 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:43,687 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 1, 1, 1, 1, 1] [2018-10-04 09:12:43,687 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:43,688 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:43,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1513438211, now seen corresponding path program 34 times [2018-10-04 09:12:43,688 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:43,688 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:43,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:43,689 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:43,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:43,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:43,965 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 205 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:43,965 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:43,965 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:12:43,973 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:12:44,016 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:12:44,016 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:44,019 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:44,032 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 205 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:44,052 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:44,053 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-04 09:12:44,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-04 09:12:44,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-04 09:12:44,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-04 09:12:44,053 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand 21 states. [2018-10-04 09:12:44,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:44,168 INFO L93 Difference]: Finished difference Result 110 states and 113 transitions. [2018-10-04 09:12:44,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-04 09:12:44,168 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 93 [2018-10-04 09:12:44,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:44,169 INFO L225 Difference]: With dead ends: 110 [2018-10-04 09:12:44,169 INFO L226 Difference]: Without dead ends: 104 [2018-10-04 09:12:44,169 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-04 09:12:44,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-10-04 09:12:44,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2018-10-04 09:12:44,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-04 09:12:44,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2018-10-04 09:12:44,177 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 93 [2018-10-04 09:12:44,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:44,177 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2018-10-04 09:12:44,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-04 09:12:44,177 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2018-10-04 09:12:44,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-10-04 09:12:44,178 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:44,178 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 1, 1, 1, 1, 1] [2018-10-04 09:12:44,178 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:44,178 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:44,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1385467661, now seen corresponding path program 35 times [2018-10-04 09:12:44,178 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:44,178 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:44,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:44,179 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:44,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:44,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:44,907 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 684 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:44,907 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:44,907 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:12:44,914 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:12:44,967 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-04 09:12:44,967 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:44,969 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:44,988 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 684 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:45,013 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:45,013 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-04 09:12:45,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-04 09:12:45,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-04 09:12:45,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1141, Unknown=0, NotChecked=0, Total=1560 [2018-10-04 09:12:45,015 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand 40 states. [2018-10-04 09:12:45,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:45,711 INFO L93 Difference]: Finished difference Result 184 states and 188 transitions. [2018-10-04 09:12:45,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-04 09:12:45,712 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 97 [2018-10-04 09:12:45,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:45,712 INFO L225 Difference]: With dead ends: 184 [2018-10-04 09:12:45,713 INFO L226 Difference]: Without dead ends: 101 [2018-10-04 09:12:45,714 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=837, Invalid=2585, Unknown=0, NotChecked=0, Total=3422 [2018-10-04 09:12:45,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-04 09:12:45,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-10-04 09:12:45,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-04 09:12:45,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2018-10-04 09:12:45,736 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 97 [2018-10-04 09:12:45,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:45,736 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2018-10-04 09:12:45,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-04 09:12:45,736 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2018-10-04 09:12:45,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-04 09:12:45,737 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:45,737 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 1, 1, 1, 1, 1] [2018-10-04 09:12:45,737 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:45,737 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:45,738 INFO L82 PathProgramCache]: Analyzing trace with hash -209035110, now seen corresponding path program 36 times [2018-10-04 09:12:45,738 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:45,738 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:45,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:45,739 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:45,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:45,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:46,104 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 226 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:46,104 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:46,104 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:12:46,111 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:12:46,163 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-04 09:12:46,164 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:46,167 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:46,185 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 226 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:46,206 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:46,207 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-04 09:12:46,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-04 09:12:46,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-04 09:12:46,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-04 09:12:46,207 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand 22 states. [2018-10-04 09:12:46,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:46,381 INFO L93 Difference]: Finished difference Result 115 states and 118 transitions. [2018-10-04 09:12:46,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-04 09:12:46,381 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 98 [2018-10-04 09:12:46,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:46,382 INFO L225 Difference]: With dead ends: 115 [2018-10-04 09:12:46,382 INFO L226 Difference]: Without dead ends: 109 [2018-10-04 09:12:46,383 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-04 09:12:46,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-10-04 09:12:46,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 105. [2018-10-04 09:12:46,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-04 09:12:46,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2018-10-04 09:12:46,391 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 98 [2018-10-04 09:12:46,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:46,392 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2018-10-04 09:12:46,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-04 09:12:46,392 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2018-10-04 09:12:46,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-04 09:12:46,392 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:46,393 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 1, 1, 1, 1, 1] [2018-10-04 09:12:46,393 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:46,393 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:46,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1566476528, now seen corresponding path program 37 times [2018-10-04 09:12:46,393 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:46,393 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:46,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:46,394 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:46,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:46,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:48,504 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 760 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:48,504 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:48,504 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:12:48,513 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:12:48,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:48,558 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:48,578 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 760 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:48,601 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:48,601 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-04 09:12:48,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-04 09:12:48,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-04 09:12:48,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=1261, Unknown=0, NotChecked=0, Total=1722 [2018-10-04 09:12:48,602 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand 42 states. [2018-10-04 09:12:49,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:49,638 INFO L93 Difference]: Finished difference Result 193 states and 197 transitions. [2018-10-04 09:12:49,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-04 09:12:49,638 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 102 [2018-10-04 09:12:49,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:49,639 INFO L225 Difference]: With dead ends: 193 [2018-10-04 09:12:49,639 INFO L226 Difference]: Without dead ends: 106 [2018-10-04 09:12:49,641 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=921, Invalid=2861, Unknown=0, NotChecked=0, Total=3782 [2018-10-04 09:12:49,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-10-04 09:12:49,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-10-04 09:12:49,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-10-04 09:12:49,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2018-10-04 09:12:49,652 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 102 [2018-10-04 09:12:49,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:49,652 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2018-10-04 09:12:49,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-04 09:12:49,652 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2018-10-04 09:12:49,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-10-04 09:12:49,653 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:49,653 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 1, 1, 1, 1, 1] [2018-10-04 09:12:49,654 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:49,654 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:49,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1920546761, now seen corresponding path program 38 times [2018-10-04 09:12:49,654 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:49,654 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:49,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:49,655 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:12:49,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:49,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:50,933 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 248 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:50,933 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:50,933 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:12:50,942 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:12:50,998 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:12:50,999 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:51,001 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:51,020 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 248 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:51,046 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:51,047 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-04 09:12:51,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-04 09:12:51,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-04 09:12:51,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-04 09:12:51,047 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 23 states. [2018-10-04 09:12:51,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:51,170 INFO L93 Difference]: Finished difference Result 120 states and 123 transitions. [2018-10-04 09:12:51,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-04 09:12:51,170 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 103 [2018-10-04 09:12:51,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:51,171 INFO L225 Difference]: With dead ends: 120 [2018-10-04 09:12:51,172 INFO L226 Difference]: Without dead ends: 114 [2018-10-04 09:12:51,172 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-04 09:12:51,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-10-04 09:12:51,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 110. [2018-10-04 09:12:51,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-10-04 09:12:51,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2018-10-04 09:12:51,183 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 103 [2018-10-04 09:12:51,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:51,184 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2018-10-04 09:12:51,184 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-04 09:12:51,184 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2018-10-04 09:12:51,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-04 09:12:51,184 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:51,184 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 1, 1, 1, 1, 1] [2018-10-04 09:12:51,184 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:51,185 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:51,185 INFO L82 PathProgramCache]: Analyzing trace with hash -756867393, now seen corresponding path program 39 times [2018-10-04 09:12:51,185 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:51,185 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:51,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:51,186 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:51,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:51,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:51,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1050 backedges. 840 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:51,970 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:51,971 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:12:51,978 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:12:52,051 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-10-04 09:12:52,052 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:52,055 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:52,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1050 backedges. 840 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:52,110 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:52,110 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-04 09:12:52,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-04 09:12:52,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-04 09:12:52,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=505, Invalid=1387, Unknown=0, NotChecked=0, Total=1892 [2018-10-04 09:12:52,112 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 44 states. [2018-10-04 09:12:54,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:54,384 INFO L93 Difference]: Finished difference Result 202 states and 206 transitions. [2018-10-04 09:12:54,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-04 09:12:54,385 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 107 [2018-10-04 09:12:54,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:54,385 INFO L225 Difference]: With dead ends: 202 [2018-10-04 09:12:54,385 INFO L226 Difference]: Without dead ends: 111 [2018-10-04 09:12:54,387 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1009, Invalid=3151, Unknown=0, NotChecked=0, Total=4160 [2018-10-04 09:12:54,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-04 09:12:54,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-10-04 09:12:54,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-10-04 09:12:54,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2018-10-04 09:12:54,396 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 107 [2018-10-04 09:12:54,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:54,396 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2018-10-04 09:12:54,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-04 09:12:54,396 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2018-10-04 09:12:54,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-04 09:12:54,397 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:54,397 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 1, 1, 1, 1, 1] [2018-10-04 09:12:54,397 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:54,397 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:54,397 INFO L82 PathProgramCache]: Analyzing trace with hash 798222758, now seen corresponding path program 40 times [2018-10-04 09:12:54,398 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:54,398 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:54,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:54,398 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:54,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:54,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:55,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 271 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:55,105 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:55,105 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:12:55,112 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:12:55,159 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:12:55,160 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:55,164 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:55,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 271 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:55,203 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:55,203 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-04 09:12:55,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-04 09:12:55,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-04 09:12:55,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-04 09:12:55,204 INFO L87 Difference]: Start difference. First operand 111 states and 113 transitions. Second operand 24 states. [2018-10-04 09:12:55,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:55,320 INFO L93 Difference]: Finished difference Result 125 states and 128 transitions. [2018-10-04 09:12:55,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-04 09:12:55,320 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 108 [2018-10-04 09:12:55,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:55,321 INFO L225 Difference]: With dead ends: 125 [2018-10-04 09:12:55,321 INFO L226 Difference]: Without dead ends: 119 [2018-10-04 09:12:55,322 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-04 09:12:55,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-10-04 09:12:55,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 115. [2018-10-04 09:12:55,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-04 09:12:55,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2018-10-04 09:12:55,334 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 108 [2018-10-04 09:12:55,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:55,334 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2018-10-04 09:12:55,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-04 09:12:55,335 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2018-10-04 09:12:55,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-04 09:12:55,335 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:55,335 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 1, 1, 1, 1, 1] [2018-10-04 09:12:55,336 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:55,336 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:55,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1030199836, now seen corresponding path program 41 times [2018-10-04 09:12:55,336 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:55,336 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:55,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:55,337 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:55,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:55,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:56,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 924 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:56,498 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:56,498 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:12:56,506 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:12:56,571 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-10-04 09:12:56,572 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:56,574 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:56,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 924 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:56,615 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:56,616 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-04 09:12:56,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-04 09:12:56,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-04 09:12:56,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=551, Invalid=1519, Unknown=0, NotChecked=0, Total=2070 [2018-10-04 09:12:56,617 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand 46 states. [2018-10-04 09:12:57,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:57,896 INFO L93 Difference]: Finished difference Result 211 states and 215 transitions. [2018-10-04 09:12:57,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-04 09:12:57,896 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 112 [2018-10-04 09:12:57,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:57,897 INFO L225 Difference]: With dead ends: 211 [2018-10-04 09:12:57,897 INFO L226 Difference]: Without dead ends: 116 [2018-10-04 09:12:57,899 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1101, Invalid=3455, Unknown=0, NotChecked=0, Total=4556 [2018-10-04 09:12:57,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-10-04 09:12:57,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-10-04 09:12:57,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-04 09:12:57,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 118 transitions. [2018-10-04 09:12:57,911 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 118 transitions. Word has length 112 [2018-10-04 09:12:57,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:57,911 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 118 transitions. [2018-10-04 09:12:57,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-04 09:12:57,911 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 118 transitions. [2018-10-04 09:12:57,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-10-04 09:12:57,912 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:57,912 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 22, 21, 21, 1, 1, 1, 1, 1] [2018-10-04 09:12:57,912 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:57,912 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:57,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1949005931, now seen corresponding path program 42 times [2018-10-04 09:12:57,913 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:57,913 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:57,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:57,913 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:57,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:57,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:58,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 295 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:58,897 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:58,897 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:12:58,904 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:12:58,985 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-10-04 09:12:58,986 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:12:58,988 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:12:59,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 295 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:59,026 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:12:59,026 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-04 09:12:59,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-04 09:12:59,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-04 09:12:59,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-04 09:12:59,027 INFO L87 Difference]: Start difference. First operand 116 states and 118 transitions. Second operand 25 states. [2018-10-04 09:12:59,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:12:59,202 INFO L93 Difference]: Finished difference Result 130 states and 133 transitions. [2018-10-04 09:12:59,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-04 09:12:59,202 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 113 [2018-10-04 09:12:59,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:12:59,203 INFO L225 Difference]: With dead ends: 130 [2018-10-04 09:12:59,203 INFO L226 Difference]: Without dead ends: 124 [2018-10-04 09:12:59,204 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-04 09:12:59,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-10-04 09:12:59,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 120. [2018-10-04 09:12:59,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-10-04 09:12:59,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2018-10-04 09:12:59,217 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 113 [2018-10-04 09:12:59,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:12:59,217 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2018-10-04 09:12:59,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-04 09:12:59,217 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2018-10-04 09:12:59,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-10-04 09:12:59,217 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:12:59,217 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 1, 1, 1, 1, 1] [2018-10-04 09:12:59,218 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:12:59,218 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:12:59,218 INFO L82 PathProgramCache]: Analyzing trace with hash 725198987, now seen corresponding path program 43 times [2018-10-04 09:12:59,218 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:12:59,218 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:12:59,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:59,219 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:12:59,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:12:59,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:12:59,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1265 backedges. 1012 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:12:59,957 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:12:59,958 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:12:59,967 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:13:00,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:00,021 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:00,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1265 backedges. 1012 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:00,095 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:00,095 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-04 09:13:00,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-04 09:13:00,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-04 09:13:00,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=1657, Unknown=0, NotChecked=0, Total=2256 [2018-10-04 09:13:00,096 INFO L87 Difference]: Start difference. First operand 120 states and 122 transitions. Second operand 48 states. [2018-10-04 09:13:02,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:02,172 INFO L93 Difference]: Finished difference Result 220 states and 224 transitions. [2018-10-04 09:13:02,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-04 09:13:02,172 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 117 [2018-10-04 09:13:02,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:02,173 INFO L225 Difference]: With dead ends: 220 [2018-10-04 09:13:02,173 INFO L226 Difference]: Without dead ends: 121 [2018-10-04 09:13:02,173 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1197, Invalid=3773, Unknown=0, NotChecked=0, Total=4970 [2018-10-04 09:13:02,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-10-04 09:13:02,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-10-04 09:13:02,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-10-04 09:13:02,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 123 transitions. [2018-10-04 09:13:02,182 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 123 transitions. Word has length 117 [2018-10-04 09:13:02,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:02,182 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 123 transitions. [2018-10-04 09:13:02,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-04 09:13:02,183 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 123 transitions. [2018-10-04 09:13:02,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-04 09:13:02,183 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:02,184 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 22, 1, 1, 1, 1, 1] [2018-10-04 09:13:02,184 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:02,184 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:02,184 INFO L82 PathProgramCache]: Analyzing trace with hash 995311282, now seen corresponding path program 44 times [2018-10-04 09:13:02,184 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:02,184 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:02,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:02,185 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:13:02,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:02,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:02,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 320 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:02,793 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:02,793 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:13:02,802 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:13:02,858 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:13:02,859 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:02,861 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:02,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 320 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:02,903 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:02,903 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-04 09:13:02,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-04 09:13:02,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-04 09:13:02,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-04 09:13:02,904 INFO L87 Difference]: Start difference. First operand 121 states and 123 transitions. Second operand 26 states. [2018-10-04 09:13:03,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:03,028 INFO L93 Difference]: Finished difference Result 135 states and 138 transitions. [2018-10-04 09:13:03,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-04 09:13:03,029 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 118 [2018-10-04 09:13:03,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:03,030 INFO L225 Difference]: With dead ends: 135 [2018-10-04 09:13:03,030 INFO L226 Difference]: Without dead ends: 129 [2018-10-04 09:13:03,031 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-04 09:13:03,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-10-04 09:13:03,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 125. [2018-10-04 09:13:03,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-10-04 09:13:03,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 127 transitions. [2018-10-04 09:13:03,045 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 127 transitions. Word has length 118 [2018-10-04 09:13:03,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:03,045 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 127 transitions. [2018-10-04 09:13:03,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-04 09:13:03,045 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 127 transitions. [2018-10-04 09:13:03,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-10-04 09:13:03,046 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:03,046 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 1, 1, 1, 1, 1] [2018-10-04 09:13:03,046 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:03,047 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:03,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1935656, now seen corresponding path program 45 times [2018-10-04 09:13:03,047 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:03,047 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:03,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:03,048 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:03,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:03,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:03,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1380 backedges. 1104 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:03,823 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:03,823 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:13:03,832 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:13:03,911 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-10-04 09:13:03,911 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:03,914 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:03,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1380 backedges. 1104 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:03,972 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:03,972 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-04 09:13:03,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-04 09:13:03,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-04 09:13:03,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=649, Invalid=1801, Unknown=0, NotChecked=0, Total=2450 [2018-10-04 09:13:03,973 INFO L87 Difference]: Start difference. First operand 125 states and 127 transitions. Second operand 50 states. [2018-10-04 09:13:05,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:05,381 INFO L93 Difference]: Finished difference Result 229 states and 233 transitions. [2018-10-04 09:13:05,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-04 09:13:05,381 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 122 [2018-10-04 09:13:05,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:05,383 INFO L225 Difference]: With dead ends: 229 [2018-10-04 09:13:05,383 INFO L226 Difference]: Without dead ends: 126 [2018-10-04 09:13:05,384 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1297, Invalid=4105, Unknown=0, NotChecked=0, Total=5402 [2018-10-04 09:13:05,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-10-04 09:13:05,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2018-10-04 09:13:05,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-10-04 09:13:05,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 128 transitions. [2018-10-04 09:13:05,396 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 128 transitions. Word has length 122 [2018-10-04 09:13:05,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:05,396 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 128 transitions. [2018-10-04 09:13:05,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-04 09:13:05,396 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 128 transitions. [2018-10-04 09:13:05,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-10-04 09:13:05,397 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:05,397 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 24, 23, 23, 1, 1, 1, 1, 1] [2018-10-04 09:13:05,397 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:05,397 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:05,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1360966497, now seen corresponding path program 46 times [2018-10-04 09:13:05,397 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:05,397 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:05,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:05,398 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:05,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:05,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:05,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 346 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:05,944 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:05,944 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:13:05,951 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:13:06,011 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:13:06,011 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:06,015 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:06,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 346 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:06,070 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:06,070 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-04 09:13:06,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-04 09:13:06,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-04 09:13:06,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-04 09:13:06,072 INFO L87 Difference]: Start difference. First operand 126 states and 128 transitions. Second operand 27 states. [2018-10-04 09:13:06,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:06,242 INFO L93 Difference]: Finished difference Result 140 states and 143 transitions. [2018-10-04 09:13:06,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-04 09:13:06,242 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 123 [2018-10-04 09:13:06,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:06,243 INFO L225 Difference]: With dead ends: 140 [2018-10-04 09:13:06,243 INFO L226 Difference]: Without dead ends: 134 [2018-10-04 09:13:06,243 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-04 09:13:06,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-10-04 09:13:06,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 130. [2018-10-04 09:13:06,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-10-04 09:13:06,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 132 transitions. [2018-10-04 09:13:06,256 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 132 transitions. Word has length 123 [2018-10-04 09:13:06,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:06,256 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 132 transitions. [2018-10-04 09:13:06,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-04 09:13:06,256 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 132 transitions. [2018-10-04 09:13:06,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-10-04 09:13:06,256 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:06,256 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 1, 1, 1, 1, 1] [2018-10-04 09:13:06,257 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:06,257 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:06,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1531900329, now seen corresponding path program 47 times [2018-10-04 09:13:06,257 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:06,257 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:06,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:06,258 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:06,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:06,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:07,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1500 backedges. 1200 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:07,206 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:07,206 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:13:07,214 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:13:07,290 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-10-04 09:13:07,290 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:07,293 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:07,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1500 backedges. 1200 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:07,336 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:07,337 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-04 09:13:07,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-04 09:13:07,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-04 09:13:07,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=701, Invalid=1951, Unknown=0, NotChecked=0, Total=2652 [2018-10-04 09:13:07,338 INFO L87 Difference]: Start difference. First operand 130 states and 132 transitions. Second operand 52 states. [2018-10-04 09:13:08,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:08,790 INFO L93 Difference]: Finished difference Result 238 states and 242 transitions. [2018-10-04 09:13:08,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-04 09:13:08,790 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 127 [2018-10-04 09:13:08,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:08,791 INFO L225 Difference]: With dead ends: 238 [2018-10-04 09:13:08,791 INFO L226 Difference]: Without dead ends: 131 [2018-10-04 09:13:08,792 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1401, Invalid=4451, Unknown=0, NotChecked=0, Total=5852 [2018-10-04 09:13:08,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-04 09:13:08,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-10-04 09:13:08,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-10-04 09:13:08,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 133 transitions. [2018-10-04 09:13:08,803 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 133 transitions. Word has length 127 [2018-10-04 09:13:08,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:08,804 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 133 transitions. [2018-10-04 09:13:08,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-04 09:13:08,804 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 133 transitions. [2018-10-04 09:13:08,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-10-04 09:13:08,804 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:08,805 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 25, 24, 24, 1, 1, 1, 1, 1] [2018-10-04 09:13:08,805 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:08,805 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:08,805 INFO L82 PathProgramCache]: Analyzing trace with hash -652320834, now seen corresponding path program 48 times [2018-10-04 09:13:08,805 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:08,805 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:08,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:08,806 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:08,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:08,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:09,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1525 backedges. 373 proven. 1152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:09,324 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:09,324 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:13:09,330 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:13:09,407 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-04 09:13:09,408 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:09,411 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:09,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1525 backedges. 373 proven. 1152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:09,468 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:09,468 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-04 09:13:09,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-04 09:13:09,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-04 09:13:09,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-04 09:13:09,469 INFO L87 Difference]: Start difference. First operand 131 states and 133 transitions. Second operand 28 states. [2018-10-04 09:13:09,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:09,618 INFO L93 Difference]: Finished difference Result 145 states and 148 transitions. [2018-10-04 09:13:09,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-04 09:13:09,619 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 128 [2018-10-04 09:13:09,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:09,620 INFO L225 Difference]: With dead ends: 145 [2018-10-04 09:13:09,620 INFO L226 Difference]: Without dead ends: 139 [2018-10-04 09:13:09,620 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-04 09:13:09,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-10-04 09:13:09,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 135. [2018-10-04 09:13:09,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-10-04 09:13:09,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 137 transitions. [2018-10-04 09:13:09,631 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 137 transitions. Word has length 128 [2018-10-04 09:13:09,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:09,632 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 137 transitions. [2018-10-04 09:13:09,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-04 09:13:09,632 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 137 transitions. [2018-10-04 09:13:09,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-10-04 09:13:09,632 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:09,632 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 1, 1, 1, 1, 1] [2018-10-04 09:13:09,632 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:09,633 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:09,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1843837900, now seen corresponding path program 49 times [2018-10-04 09:13:09,633 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:09,633 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:09,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:09,634 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:09,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:09,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:10,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 1300 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:10,611 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:10,611 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:13:10,621 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:13:10,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:10,685 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:10,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 1300 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:10,742 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:10,742 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-04 09:13:10,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-04 09:13:10,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-04 09:13:10,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=755, Invalid=2107, Unknown=0, NotChecked=0, Total=2862 [2018-10-04 09:13:10,743 INFO L87 Difference]: Start difference. First operand 135 states and 137 transitions. Second operand 54 states. [2018-10-04 09:13:12,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:12,252 INFO L93 Difference]: Finished difference Result 247 states and 251 transitions. [2018-10-04 09:13:12,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-04 09:13:12,252 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 132 [2018-10-04 09:13:12,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:12,253 INFO L225 Difference]: With dead ends: 247 [2018-10-04 09:13:12,253 INFO L226 Difference]: Without dead ends: 136 [2018-10-04 09:13:12,254 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1509, Invalid=4811, Unknown=0, NotChecked=0, Total=6320 [2018-10-04 09:13:12,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-10-04 09:13:12,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2018-10-04 09:13:12,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-10-04 09:13:12,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2018-10-04 09:13:12,269 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 132 [2018-10-04 09:13:12,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:12,269 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2018-10-04 09:13:12,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-04 09:13:12,270 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2018-10-04 09:13:12,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-10-04 09:13:12,270 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:12,270 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 26, 25, 25, 1, 1, 1, 1, 1] [2018-10-04 09:13:12,271 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:12,271 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:12,271 INFO L82 PathProgramCache]: Analyzing trace with hash 35240749, now seen corresponding path program 50 times [2018-10-04 09:13:12,271 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:12,271 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:12,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:12,272 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:13:12,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:12,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:13,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 401 proven. 1250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:13,096 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:13,096 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:13:13,103 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:13:13,163 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:13:13,163 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:13,166 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:13,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 401 proven. 1250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:13,223 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:13,223 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-04 09:13:13,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-04 09:13:13,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-04 09:13:13,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-04 09:13:13,224 INFO L87 Difference]: Start difference. First operand 136 states and 138 transitions. Second operand 29 states. [2018-10-04 09:13:14,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:14,324 INFO L93 Difference]: Finished difference Result 150 states and 153 transitions. [2018-10-04 09:13:14,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-04 09:13:14,324 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 133 [2018-10-04 09:13:14,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:14,326 INFO L225 Difference]: With dead ends: 150 [2018-10-04 09:13:14,326 INFO L226 Difference]: Without dead ends: 144 [2018-10-04 09:13:14,326 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-04 09:13:14,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-10-04 09:13:14,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 140. [2018-10-04 09:13:14,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-10-04 09:13:14,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 142 transitions. [2018-10-04 09:13:14,338 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 142 transitions. Word has length 133 [2018-10-04 09:13:14,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:14,338 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 142 transitions. [2018-10-04 09:13:14,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-04 09:13:14,338 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 142 transitions. [2018-10-04 09:13:14,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-10-04 09:13:14,339 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:14,339 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 1, 1, 1, 1, 1] [2018-10-04 09:13:14,339 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:14,339 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:14,339 INFO L82 PathProgramCache]: Analyzing trace with hash -838119389, now seen corresponding path program 51 times [2018-10-04 09:13:14,339 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:14,339 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:14,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:14,340 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:14,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:14,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:15,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 1404 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:15,476 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:15,477 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:13:15,484 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:13:15,575 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-10-04 09:13:15,575 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:15,579 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:15,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 1404 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:15,623 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:15,623 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-04 09:13:15,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-04 09:13:15,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-04 09:13:15,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=811, Invalid=2269, Unknown=0, NotChecked=0, Total=3080 [2018-10-04 09:13:15,624 INFO L87 Difference]: Start difference. First operand 140 states and 142 transitions. Second operand 56 states. [2018-10-04 09:13:16,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:16,998 INFO L93 Difference]: Finished difference Result 256 states and 260 transitions. [2018-10-04 09:13:16,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-04 09:13:16,998 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 137 [2018-10-04 09:13:16,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:16,999 INFO L225 Difference]: With dead ends: 256 [2018-10-04 09:13:16,999 INFO L226 Difference]: Without dead ends: 141 [2018-10-04 09:13:17,000 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1027 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1621, Invalid=5185, Unknown=0, NotChecked=0, Total=6806 [2018-10-04 09:13:17,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-10-04 09:13:17,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-10-04 09:13:17,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-10-04 09:13:17,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 143 transitions. [2018-10-04 09:13:17,015 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 143 transitions. Word has length 137 [2018-10-04 09:13:17,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:17,016 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 143 transitions. [2018-10-04 09:13:17,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-04 09:13:17,016 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 143 transitions. [2018-10-04 09:13:17,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-10-04 09:13:17,017 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:17,017 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 27, 26, 26, 1, 1, 1, 1, 1] [2018-10-04 09:13:17,017 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:17,017 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:17,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1657490634, now seen corresponding path program 52 times [2018-10-04 09:13:17,018 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:17,018 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:17,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:17,018 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:17,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:17,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:17,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 430 proven. 1352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:17,426 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:17,426 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:13:17,434 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:13:17,491 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:13:17,491 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:17,496 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:17,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 430 proven. 1352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:17,552 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:17,552 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-04 09:13:17,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-04 09:13:17,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-04 09:13:17,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-04 09:13:17,553 INFO L87 Difference]: Start difference. First operand 141 states and 143 transitions. Second operand 30 states. [2018-10-04 09:13:17,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:17,780 INFO L93 Difference]: Finished difference Result 155 states and 158 transitions. [2018-10-04 09:13:17,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-04 09:13:17,780 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 138 [2018-10-04 09:13:17,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:17,781 INFO L225 Difference]: With dead ends: 155 [2018-10-04 09:13:17,781 INFO L226 Difference]: Without dead ends: 149 [2018-10-04 09:13:17,781 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-04 09:13:17,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-10-04 09:13:17,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 145. [2018-10-04 09:13:17,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-10-04 09:13:17,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 147 transitions. [2018-10-04 09:13:17,795 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 147 transitions. Word has length 138 [2018-10-04 09:13:17,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:17,796 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 147 transitions. [2018-10-04 09:13:17,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-04 09:13:17,796 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 147 transitions. [2018-10-04 09:13:17,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-10-04 09:13:17,797 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:17,797 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 27, 1, 1, 1, 1, 1] [2018-10-04 09:13:17,797 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:17,797 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:17,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1915800384, now seen corresponding path program 53 times [2018-10-04 09:13:17,797 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:17,797 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:17,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:17,798 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:17,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:17,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:18,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 1512 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:18,886 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:18,886 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:13:18,893 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:13:18,977 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-10-04 09:13:18,978 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:18,981 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:19,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 1512 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:19,045 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:19,046 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-04 09:13:19,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-04 09:13:19,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-04 09:13:19,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=869, Invalid=2437, Unknown=0, NotChecked=0, Total=3306 [2018-10-04 09:13:19,047 INFO L87 Difference]: Start difference. First operand 145 states and 147 transitions. Second operand 58 states. [2018-10-04 09:13:20,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:20,741 INFO L93 Difference]: Finished difference Result 265 states and 269 transitions. [2018-10-04 09:13:20,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-04 09:13:20,741 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 142 [2018-10-04 09:13:20,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:20,742 INFO L225 Difference]: With dead ends: 265 [2018-10-04 09:13:20,742 INFO L226 Difference]: Without dead ends: 146 [2018-10-04 09:13:20,743 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1737, Invalid=5573, Unknown=0, NotChecked=0, Total=7310 [2018-10-04 09:13:20,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-10-04 09:13:20,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2018-10-04 09:13:20,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-10-04 09:13:20,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 148 transitions. [2018-10-04 09:13:20,756 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 148 transitions. Word has length 142 [2018-10-04 09:13:20,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:20,756 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 148 transitions. [2018-10-04 09:13:20,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-04 09:13:20,756 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 148 transitions. [2018-10-04 09:13:20,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-10-04 09:13:20,757 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:20,757 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 28, 27, 27, 1, 1, 1, 1, 1] [2018-10-04 09:13:20,757 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:20,757 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:20,758 INFO L82 PathProgramCache]: Analyzing trace with hash 520593145, now seen corresponding path program 54 times [2018-10-04 09:13:20,758 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:20,758 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:20,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:20,758 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:20,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:20,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:21,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1918 backedges. 460 proven. 1458 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:21,182 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:21,183 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:13:21,189 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:13:21,277 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-10-04 09:13:21,278 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:21,281 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:21,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1918 backedges. 460 proven. 1458 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:21,342 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:21,343 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-04 09:13:21,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-04 09:13:21,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-04 09:13:21,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-04 09:13:21,344 INFO L87 Difference]: Start difference. First operand 146 states and 148 transitions. Second operand 31 states. [2018-10-04 09:13:21,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:21,538 INFO L93 Difference]: Finished difference Result 160 states and 163 transitions. [2018-10-04 09:13:21,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-04 09:13:21,539 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 143 [2018-10-04 09:13:21,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:21,540 INFO L225 Difference]: With dead ends: 160 [2018-10-04 09:13:21,540 INFO L226 Difference]: Without dead ends: 154 [2018-10-04 09:13:21,540 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-04 09:13:21,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-10-04 09:13:21,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 150. [2018-10-04 09:13:21,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-10-04 09:13:21,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 152 transitions. [2018-10-04 09:13:21,552 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 152 transitions. Word has length 143 [2018-10-04 09:13:21,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:21,552 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 152 transitions. [2018-10-04 09:13:21,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-04 09:13:21,552 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 152 transitions. [2018-10-04 09:13:21,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-10-04 09:13:21,553 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:21,553 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 28, 1, 1, 1, 1, 1] [2018-10-04 09:13:21,553 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:21,553 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:21,553 INFO L82 PathProgramCache]: Analyzing trace with hash 915041775, now seen corresponding path program 55 times [2018-10-04 09:13:21,553 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:21,553 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:21,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:21,554 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:21,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:21,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:22,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2030 backedges. 1624 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:22,640 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:22,640 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:13:22,649 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:13:22,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:22,726 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:22,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2030 backedges. 1624 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:22,790 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:22,790 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-10-04 09:13:22,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-04 09:13:22,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-04 09:13:22,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=929, Invalid=2611, Unknown=0, NotChecked=0, Total=3540 [2018-10-04 09:13:22,792 INFO L87 Difference]: Start difference. First operand 150 states and 152 transitions. Second operand 60 states. [2018-10-04 09:13:24,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:24,693 INFO L93 Difference]: Finished difference Result 274 states and 278 transitions. [2018-10-04 09:13:24,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-04 09:13:24,694 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 147 [2018-10-04 09:13:24,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:24,695 INFO L225 Difference]: With dead ends: 274 [2018-10-04 09:13:24,695 INFO L226 Difference]: Without dead ends: 151 [2018-10-04 09:13:24,696 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1190 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1857, Invalid=5975, Unknown=0, NotChecked=0, Total=7832 [2018-10-04 09:13:24,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-10-04 09:13:24,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-10-04 09:13:24,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-10-04 09:13:24,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 153 transitions. [2018-10-04 09:13:24,708 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 153 transitions. Word has length 147 [2018-10-04 09:13:24,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:24,709 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 153 transitions. [2018-10-04 09:13:24,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-04 09:13:24,709 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 153 transitions. [2018-10-04 09:13:24,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-10-04 09:13:24,709 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:24,709 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 29, 28, 28, 1, 1, 1, 1, 1] [2018-10-04 09:13:24,710 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:24,710 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:24,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1773143510, now seen corresponding path program 56 times [2018-10-04 09:13:24,710 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:24,710 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:24,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:24,711 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:13:24,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:24,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:25,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2059 backedges. 491 proven. 1568 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:25,132 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:25,132 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:13:25,140 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:13:25,205 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:13:25,206 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:25,208 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:25,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2059 backedges. 491 proven. 1568 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:25,251 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:25,251 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-04 09:13:25,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-04 09:13:25,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-04 09:13:25,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-04 09:13:25,252 INFO L87 Difference]: Start difference. First operand 151 states and 153 transitions. Second operand 32 states. [2018-10-04 09:13:25,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:25,454 INFO L93 Difference]: Finished difference Result 165 states and 168 transitions. [2018-10-04 09:13:25,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-04 09:13:25,454 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 148 [2018-10-04 09:13:25,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:25,455 INFO L225 Difference]: With dead ends: 165 [2018-10-04 09:13:25,455 INFO L226 Difference]: Without dead ends: 159 [2018-10-04 09:13:25,455 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-04 09:13:25,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-10-04 09:13:25,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 155. [2018-10-04 09:13:25,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-10-04 09:13:25,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 157 transitions. [2018-10-04 09:13:25,473 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 157 transitions. Word has length 148 [2018-10-04 09:13:25,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:25,473 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 157 transitions. [2018-10-04 09:13:25,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-04 09:13:25,473 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 157 transitions. [2018-10-04 09:13:25,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-10-04 09:13:25,474 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:25,474 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 29, 1, 1, 1, 1, 1] [2018-10-04 09:13:25,474 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:25,474 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:25,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1766187444, now seen corresponding path program 57 times [2018-10-04 09:13:25,475 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:25,475 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:25,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:25,475 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:25,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:25,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:26,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2175 backedges. 1740 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:26,600 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:26,600 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:13:26,608 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:13:26,706 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-10-04 09:13:26,706 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:26,711 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:26,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2175 backedges. 1740 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:26,773 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:26,773 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-10-04 09:13:26,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-04 09:13:26,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-04 09:13:26,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=991, Invalid=2791, Unknown=0, NotChecked=0, Total=3782 [2018-10-04 09:13:26,775 INFO L87 Difference]: Start difference. First operand 155 states and 157 transitions. Second operand 62 states. [2018-10-04 09:13:27,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:27,822 INFO L93 Difference]: Finished difference Result 283 states and 287 transitions. [2018-10-04 09:13:27,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-04 09:13:27,822 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 152 [2018-10-04 09:13:27,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:27,823 INFO L225 Difference]: With dead ends: 283 [2018-10-04 09:13:27,823 INFO L226 Difference]: Without dead ends: 156 [2018-10-04 09:13:27,824 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1981, Invalid=6391, Unknown=0, NotChecked=0, Total=8372 [2018-10-04 09:13:27,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-10-04 09:13:27,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2018-10-04 09:13:27,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-10-04 09:13:27,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 158 transitions. [2018-10-04 09:13:27,836 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 158 transitions. Word has length 152 [2018-10-04 09:13:27,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:27,836 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 158 transitions. [2018-10-04 09:13:27,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-04 09:13:27,837 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 158 transitions. [2018-10-04 09:13:27,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-10-04 09:13:27,837 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:27,837 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 30, 29, 29, 1, 1, 1, 1, 1] [2018-10-04 09:13:27,837 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:27,837 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:27,838 INFO L82 PathProgramCache]: Analyzing trace with hash -928358715, now seen corresponding path program 58 times [2018-10-04 09:13:27,838 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:27,838 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:27,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:27,838 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:27,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:27,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:28,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2205 backedges. 523 proven. 1682 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:28,536 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:28,536 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:13:28,544 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:13:28,616 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:13:28,616 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:28,621 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:28,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2205 backedges. 523 proven. 1682 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:28,675 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:28,675 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-04 09:13:28,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-04 09:13:28,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-04 09:13:28,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-04 09:13:28,676 INFO L87 Difference]: Start difference. First operand 156 states and 158 transitions. Second operand 33 states. [2018-10-04 09:13:28,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:28,898 INFO L93 Difference]: Finished difference Result 170 states and 173 transitions. [2018-10-04 09:13:28,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-04 09:13:28,898 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 153 [2018-10-04 09:13:28,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:28,899 INFO L225 Difference]: With dead ends: 170 [2018-10-04 09:13:28,899 INFO L226 Difference]: Without dead ends: 164 [2018-10-04 09:13:28,900 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-04 09:13:28,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-10-04 09:13:28,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 160. [2018-10-04 09:13:28,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-10-04 09:13:28,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 162 transitions. [2018-10-04 09:13:28,918 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 162 transitions. Word has length 153 [2018-10-04 09:13:28,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:28,919 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 162 transitions. [2018-10-04 09:13:28,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-04 09:13:28,919 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 162 transitions. [2018-10-04 09:13:28,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-10-04 09:13:28,919 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:28,919 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 30, 1, 1, 1, 1, 1] [2018-10-04 09:13:28,920 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:28,920 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:28,920 INFO L82 PathProgramCache]: Analyzing trace with hash -839882821, now seen corresponding path program 59 times [2018-10-04 09:13:28,920 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:28,920 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:28,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:28,921 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:28,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:28,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:30,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2325 backedges. 1860 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:30,047 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:30,047 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:13:30,057 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:13:30,153 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-10-04 09:13:30,153 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:30,157 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:30,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2325 backedges. 1860 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:30,212 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:30,212 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-10-04 09:13:30,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-04 09:13:30,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-04 09:13:30,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1055, Invalid=2977, Unknown=0, NotChecked=0, Total=4032 [2018-10-04 09:13:30,214 INFO L87 Difference]: Start difference. First operand 160 states and 162 transitions. Second operand 64 states. [2018-10-04 09:13:32,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:32,097 INFO L93 Difference]: Finished difference Result 292 states and 296 transitions. [2018-10-04 09:13:32,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-04 09:13:32,097 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 157 [2018-10-04 09:13:32,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:32,098 INFO L225 Difference]: With dead ends: 292 [2018-10-04 09:13:32,098 INFO L226 Difference]: Without dead ends: 161 [2018-10-04 09:13:32,099 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1365 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2109, Invalid=6821, Unknown=0, NotChecked=0, Total=8930 [2018-10-04 09:13:32,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-10-04 09:13:32,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-10-04 09:13:32,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-10-04 09:13:32,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 163 transitions. [2018-10-04 09:13:32,117 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 163 transitions. Word has length 157 [2018-10-04 09:13:32,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:32,117 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 163 transitions. [2018-10-04 09:13:32,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-04 09:13:32,117 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 163 transitions. [2018-10-04 09:13:32,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-10-04 09:13:32,118 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:32,118 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 31, 30, 30, 1, 1, 1, 1, 1] [2018-10-04 09:13:32,118 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:32,118 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:32,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1453492962, now seen corresponding path program 60 times [2018-10-04 09:13:32,119 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:32,119 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:32,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:32,120 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:32,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:32,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:32,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2356 backedges. 556 proven. 1800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:32,716 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:32,716 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:13:32,732 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:13:32,851 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-04 09:13:32,851 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:32,855 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:32,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2356 backedges. 556 proven. 1800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:32,903 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:32,903 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-04 09:13:32,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-04 09:13:32,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-04 09:13:32,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-04 09:13:32,904 INFO L87 Difference]: Start difference. First operand 161 states and 163 transitions. Second operand 34 states. [2018-10-04 09:13:33,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:33,117 INFO L93 Difference]: Finished difference Result 175 states and 178 transitions. [2018-10-04 09:13:33,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-04 09:13:33,118 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 158 [2018-10-04 09:13:33,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:33,118 INFO L225 Difference]: With dead ends: 175 [2018-10-04 09:13:33,119 INFO L226 Difference]: Without dead ends: 169 [2018-10-04 09:13:33,119 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-04 09:13:33,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-10-04 09:13:33,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 165. [2018-10-04 09:13:33,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-10-04 09:13:33,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 167 transitions. [2018-10-04 09:13:33,134 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 167 transitions. Word has length 158 [2018-10-04 09:13:33,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:33,134 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 167 transitions. [2018-10-04 09:13:33,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-04 09:13:33,134 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 167 transitions. [2018-10-04 09:13:33,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-10-04 09:13:33,135 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:33,136 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 1, 1, 1, 1, 1] [2018-10-04 09:13:33,136 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:33,136 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:33,136 INFO L82 PathProgramCache]: Analyzing trace with hash 227229016, now seen corresponding path program 61 times [2018-10-04 09:13:33,136 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:33,136 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:33,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:33,137 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:33,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:33,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:34,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2480 backedges. 1984 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:34,470 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:34,470 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:13:34,478 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:13:34,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:34,554 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:34,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2480 backedges. 1984 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:34,612 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:34,612 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-10-04 09:13:34,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-04 09:13:34,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-04 09:13:34,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1121, Invalid=3169, Unknown=0, NotChecked=0, Total=4290 [2018-10-04 09:13:34,614 INFO L87 Difference]: Start difference. First operand 165 states and 167 transitions. Second operand 66 states. [2018-10-04 09:13:36,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:36,493 INFO L93 Difference]: Finished difference Result 301 states and 305 transitions. [2018-10-04 09:13:36,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-04 09:13:36,493 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 162 [2018-10-04 09:13:36,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:36,494 INFO L225 Difference]: With dead ends: 301 [2018-10-04 09:13:36,494 INFO L226 Difference]: Without dead ends: 166 [2018-10-04 09:13:36,495 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1457 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2241, Invalid=7265, Unknown=0, NotChecked=0, Total=9506 [2018-10-04 09:13:36,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-10-04 09:13:36,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2018-10-04 09:13:36,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-10-04 09:13:36,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 168 transitions. [2018-10-04 09:13:36,513 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 168 transitions. Word has length 162 [2018-10-04 09:13:36,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:36,514 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 168 transitions. [2018-10-04 09:13:36,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-04 09:13:36,514 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 168 transitions. [2018-10-04 09:13:36,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-10-04 09:13:36,515 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:36,515 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 32, 31, 31, 1, 1, 1, 1, 1] [2018-10-04 09:13:36,515 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:36,515 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:36,516 INFO L82 PathProgramCache]: Analyzing trace with hash 541325969, now seen corresponding path program 62 times [2018-10-04 09:13:36,516 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:36,516 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:36,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:36,517 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:13:36,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:36,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:37,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2512 backedges. 590 proven. 1922 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:37,079 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:37,079 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:13:37,087 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:13:37,150 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:13:37,150 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:37,154 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:37,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2512 backedges. 590 proven. 1922 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:37,200 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:37,201 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-04 09:13:37,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-04 09:13:37,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-04 09:13:37,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-04 09:13:37,202 INFO L87 Difference]: Start difference. First operand 166 states and 168 transitions. Second operand 35 states. [2018-10-04 09:13:37,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:37,393 INFO L93 Difference]: Finished difference Result 180 states and 183 transitions. [2018-10-04 09:13:37,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-04 09:13:37,394 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 163 [2018-10-04 09:13:37,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:37,395 INFO L225 Difference]: With dead ends: 180 [2018-10-04 09:13:37,395 INFO L226 Difference]: Without dead ends: 174 [2018-10-04 09:13:37,396 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-04 09:13:37,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2018-10-04 09:13:37,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 170. [2018-10-04 09:13:37,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2018-10-04 09:13:37,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 172 transitions. [2018-10-04 09:13:37,418 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 172 transitions. Word has length 163 [2018-10-04 09:13:37,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:37,418 INFO L480 AbstractCegarLoop]: Abstraction has 170 states and 172 transitions. [2018-10-04 09:13:37,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-04 09:13:37,418 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 172 transitions. [2018-10-04 09:13:37,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-10-04 09:13:37,419 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:37,419 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 32, 1, 1, 1, 1, 1] [2018-10-04 09:13:37,420 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:37,420 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:37,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1149189511, now seen corresponding path program 63 times [2018-10-04 09:13:37,420 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:37,420 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:37,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:37,421 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:37,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:37,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:39,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2640 backedges. 2112 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:39,085 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:39,085 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:13:39,094 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:13:39,204 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-10-04 09:13:39,205 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:39,210 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:39,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2640 backedges. 2112 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:39,263 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:39,264 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-10-04 09:13:39,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-04 09:13:39,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-04 09:13:39,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1189, Invalid=3367, Unknown=0, NotChecked=0, Total=4556 [2018-10-04 09:13:39,265 INFO L87 Difference]: Start difference. First operand 170 states and 172 transitions. Second operand 68 states. [2018-10-04 09:13:41,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:41,520 INFO L93 Difference]: Finished difference Result 310 states and 314 transitions. [2018-10-04 09:13:41,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-04 09:13:41,520 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 167 [2018-10-04 09:13:41,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:41,521 INFO L225 Difference]: With dead ends: 310 [2018-10-04 09:13:41,521 INFO L226 Difference]: Without dead ends: 171 [2018-10-04 09:13:41,522 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1552 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2377, Invalid=7723, Unknown=0, NotChecked=0, Total=10100 [2018-10-04 09:13:41,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-10-04 09:13:41,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-10-04 09:13:41,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-10-04 09:13:41,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 173 transitions. [2018-10-04 09:13:41,537 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 173 transitions. Word has length 167 [2018-10-04 09:13:41,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:41,537 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 173 transitions. [2018-10-04 09:13:41,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-04 09:13:41,537 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 173 transitions. [2018-10-04 09:13:41,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-10-04 09:13:41,538 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:41,538 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 33, 32, 32, 1, 1, 1, 1, 1] [2018-10-04 09:13:41,538 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:41,538 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:41,538 INFO L82 PathProgramCache]: Analyzing trace with hash 167304174, now seen corresponding path program 64 times [2018-10-04 09:13:41,539 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:41,539 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:41,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:41,539 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:41,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:41,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:42,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2673 backedges. 625 proven. 2048 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:42,092 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:42,092 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:13:42,101 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:13:42,181 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:13:42,182 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:42,188 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:42,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2673 backedges. 625 proven. 2048 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:42,242 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:42,243 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-04 09:13:42,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-04 09:13:42,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-04 09:13:42,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-04 09:13:42,244 INFO L87 Difference]: Start difference. First operand 171 states and 173 transitions. Second operand 36 states. [2018-10-04 09:13:42,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:42,450 INFO L93 Difference]: Finished difference Result 185 states and 188 transitions. [2018-10-04 09:13:42,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-04 09:13:42,450 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 168 [2018-10-04 09:13:42,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:42,451 INFO L225 Difference]: With dead ends: 185 [2018-10-04 09:13:42,452 INFO L226 Difference]: Without dead ends: 179 [2018-10-04 09:13:42,452 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-04 09:13:42,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-10-04 09:13:42,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 175. [2018-10-04 09:13:42,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-10-04 09:13:42,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 177 transitions. [2018-10-04 09:13:42,472 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 177 transitions. Word has length 168 [2018-10-04 09:13:42,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:42,473 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 177 transitions. [2018-10-04 09:13:42,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-04 09:13:42,473 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 177 transitions. [2018-10-04 09:13:42,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-10-04 09:13:42,473 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:42,474 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 33, 1, 1, 1, 1, 1] [2018-10-04 09:13:42,474 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:42,474 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:42,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1678104476, now seen corresponding path program 65 times [2018-10-04 09:13:42,474 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:42,474 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:42,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:42,475 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:42,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:42,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:44,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2805 backedges. 2244 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:44,808 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:44,808 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:13:44,815 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:13:44,928 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-10-04 09:13:44,928 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:44,933 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:44,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2805 backedges. 2244 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:45,008 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:45,008 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-10-04 09:13:45,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-04 09:13:45,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-04 09:13:45,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1259, Invalid=3571, Unknown=0, NotChecked=0, Total=4830 [2018-10-04 09:13:45,009 INFO L87 Difference]: Start difference. First operand 175 states and 177 transitions. Second operand 70 states. [2018-10-04 09:13:47,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:47,347 INFO L93 Difference]: Finished difference Result 319 states and 323 transitions. [2018-10-04 09:13:47,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-04 09:13:47,347 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 172 [2018-10-04 09:13:47,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:47,348 INFO L225 Difference]: With dead ends: 319 [2018-10-04 09:13:47,348 INFO L226 Difference]: Without dead ends: 176 [2018-10-04 09:13:47,349 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1650 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2517, Invalid=8195, Unknown=0, NotChecked=0, Total=10712 [2018-10-04 09:13:47,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-10-04 09:13:47,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2018-10-04 09:13:47,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2018-10-04 09:13:47,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 178 transitions. [2018-10-04 09:13:47,366 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 178 transitions. Word has length 172 [2018-10-04 09:13:47,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:47,366 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 178 transitions. [2018-10-04 09:13:47,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-04 09:13:47,367 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 178 transitions. [2018-10-04 09:13:47,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-10-04 09:13:47,367 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:47,367 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 34, 33, 33, 1, 1, 1, 1, 1] [2018-10-04 09:13:47,368 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:47,368 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:47,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1483312547, now seen corresponding path program 66 times [2018-10-04 09:13:47,368 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:47,368 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:47,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:47,369 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:47,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:47,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:47,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2839 backedges. 661 proven. 2178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:47,927 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:47,927 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:13:47,933 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:13:48,048 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-10-04 09:13:48,048 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:48,052 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:48,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2839 backedges. 661 proven. 2178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:48,102 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:48,102 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-04 09:13:48,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-04 09:13:48,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-04 09:13:48,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-04 09:13:48,103 INFO L87 Difference]: Start difference. First operand 176 states and 178 transitions. Second operand 37 states. [2018-10-04 09:13:48,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:48,346 INFO L93 Difference]: Finished difference Result 190 states and 193 transitions. [2018-10-04 09:13:48,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-04 09:13:48,346 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 173 [2018-10-04 09:13:48,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:48,347 INFO L225 Difference]: With dead ends: 190 [2018-10-04 09:13:48,347 INFO L226 Difference]: Without dead ends: 184 [2018-10-04 09:13:48,347 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-04 09:13:48,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2018-10-04 09:13:48,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 180. [2018-10-04 09:13:48,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2018-10-04 09:13:48,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 182 transitions. [2018-10-04 09:13:48,364 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 182 transitions. Word has length 173 [2018-10-04 09:13:48,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:48,364 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 182 transitions. [2018-10-04 09:13:48,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-04 09:13:48,365 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 182 transitions. [2018-10-04 09:13:48,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-10-04 09:13:48,365 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:48,366 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 34, 1, 1, 1, 1, 1] [2018-10-04 09:13:48,366 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:48,366 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:48,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1794699091, now seen corresponding path program 67 times [2018-10-04 09:13:48,366 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:48,366 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:48,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:48,367 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:48,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:48,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:50,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2975 backedges. 2380 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:50,152 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:50,153 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:13:50,159 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:13:50,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:50,242 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:50,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2975 backedges. 2380 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:50,293 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:50,293 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-10-04 09:13:50,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-04 09:13:50,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-04 09:13:50,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=3781, Unknown=0, NotChecked=0, Total=5112 [2018-10-04 09:13:50,294 INFO L87 Difference]: Start difference. First operand 180 states and 182 transitions. Second operand 72 states. [2018-10-04 09:13:52,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:52,767 INFO L93 Difference]: Finished difference Result 328 states and 332 transitions. [2018-10-04 09:13:52,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-04 09:13:52,767 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 177 [2018-10-04 09:13:52,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:52,768 INFO L225 Difference]: With dead ends: 328 [2018-10-04 09:13:52,768 INFO L226 Difference]: Without dead ends: 181 [2018-10-04 09:13:52,769 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1751 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2661, Invalid=8681, Unknown=0, NotChecked=0, Total=11342 [2018-10-04 09:13:52,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-10-04 09:13:52,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-10-04 09:13:52,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-10-04 09:13:52,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 183 transitions. [2018-10-04 09:13:52,786 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 183 transitions. Word has length 177 [2018-10-04 09:13:52,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:52,786 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 183 transitions. [2018-10-04 09:13:52,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-04 09:13:52,786 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 183 transitions. [2018-10-04 09:13:52,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-10-04 09:13:52,787 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:52,787 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 35, 34, 34, 1, 1, 1, 1, 1] [2018-10-04 09:13:52,787 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:52,787 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:52,788 INFO L82 PathProgramCache]: Analyzing trace with hash 2072574202, now seen corresponding path program 68 times [2018-10-04 09:13:52,788 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:52,788 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:52,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:52,788 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:13:52,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:52,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:53,475 INFO L134 CoverageAnalysis]: Checked inductivity of 3010 backedges. 698 proven. 2312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:53,475 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:53,475 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:13:53,482 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:13:53,566 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:13:53,566 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:53,569 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:53,599 INFO L134 CoverageAnalysis]: Checked inductivity of 3010 backedges. 698 proven. 2312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:53,619 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:53,619 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-04 09:13:53,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-04 09:13:53,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-04 09:13:53,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-04 09:13:53,620 INFO L87 Difference]: Start difference. First operand 181 states and 183 transitions. Second operand 38 states. [2018-10-04 09:13:53,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:53,870 INFO L93 Difference]: Finished difference Result 195 states and 198 transitions. [2018-10-04 09:13:53,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-04 09:13:53,870 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 178 [2018-10-04 09:13:53,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:53,871 INFO L225 Difference]: With dead ends: 195 [2018-10-04 09:13:53,871 INFO L226 Difference]: Without dead ends: 189 [2018-10-04 09:13:53,871 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-04 09:13:53,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-10-04 09:13:53,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 185. [2018-10-04 09:13:53,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-10-04 09:13:53,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 187 transitions. [2018-10-04 09:13:53,887 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 187 transitions. Word has length 178 [2018-10-04 09:13:53,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:53,887 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 187 transitions. [2018-10-04 09:13:53,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-04 09:13:53,887 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 187 transitions. [2018-10-04 09:13:53,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-10-04 09:13:53,888 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:53,888 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 35, 1, 1, 1, 1, 1] [2018-10-04 09:13:53,889 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:53,889 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:53,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1591533424, now seen corresponding path program 69 times [2018-10-04 09:13:53,889 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:53,889 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:53,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:53,890 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:53,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:53,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:55,516 INFO L134 CoverageAnalysis]: Checked inductivity of 3150 backedges. 2520 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:55,516 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:55,516 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:13:55,524 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:13:55,669 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-10-04 09:13:55,670 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:55,674 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:55,715 INFO L134 CoverageAnalysis]: Checked inductivity of 3150 backedges. 2520 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:55,744 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:55,745 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-10-04 09:13:55,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-04 09:13:55,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-04 09:13:55,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1405, Invalid=3997, Unknown=0, NotChecked=0, Total=5402 [2018-10-04 09:13:55,746 INFO L87 Difference]: Start difference. First operand 185 states and 187 transitions. Second operand 74 states. [2018-10-04 09:13:58,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:58,421 INFO L93 Difference]: Finished difference Result 337 states and 341 transitions. [2018-10-04 09:13:58,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-04 09:13:58,421 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 182 [2018-10-04 09:13:58,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:58,422 INFO L225 Difference]: With dead ends: 337 [2018-10-04 09:13:58,422 INFO L226 Difference]: Without dead ends: 186 [2018-10-04 09:13:58,423 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1855 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2809, Invalid=9181, Unknown=0, NotChecked=0, Total=11990 [2018-10-04 09:13:58,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2018-10-04 09:13:58,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2018-10-04 09:13:58,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2018-10-04 09:13:58,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 188 transitions. [2018-10-04 09:13:58,439 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 188 transitions. Word has length 182 [2018-10-04 09:13:58,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:58,439 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 188 transitions. [2018-10-04 09:13:58,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-04 09:13:58,439 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 188 transitions. [2018-10-04 09:13:58,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-10-04 09:13:58,440 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:58,440 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 36, 35, 35, 1, 1, 1, 1, 1] [2018-10-04 09:13:58,440 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:58,440 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:58,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1595685335, now seen corresponding path program 70 times [2018-10-04 09:13:58,440 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:58,440 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:58,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:58,441 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:58,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:58,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:13:59,321 INFO L134 CoverageAnalysis]: Checked inductivity of 3186 backedges. 736 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:59,321 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:13:59,321 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:13:59,328 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:13:59,418 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:13:59,419 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:13:59,423 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:13:59,468 INFO L134 CoverageAnalysis]: Checked inductivity of 3186 backedges. 736 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:13:59,496 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:13:59,496 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-04 09:13:59,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-04 09:13:59,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-04 09:13:59,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-04 09:13:59,497 INFO L87 Difference]: Start difference. First operand 186 states and 188 transitions. Second operand 39 states. [2018-10-04 09:13:59,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:13:59,707 INFO L93 Difference]: Finished difference Result 200 states and 203 transitions. [2018-10-04 09:13:59,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-04 09:13:59,707 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 183 [2018-10-04 09:13:59,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:13:59,708 INFO L225 Difference]: With dead ends: 200 [2018-10-04 09:13:59,708 INFO L226 Difference]: Without dead ends: 194 [2018-10-04 09:13:59,709 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-04 09:13:59,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2018-10-04 09:13:59,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 190. [2018-10-04 09:13:59,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2018-10-04 09:13:59,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 192 transitions. [2018-10-04 09:13:59,725 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 192 transitions. Word has length 183 [2018-10-04 09:13:59,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:13:59,725 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 192 transitions. [2018-10-04 09:13:59,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-04 09:13:59,725 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 192 transitions. [2018-10-04 09:13:59,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2018-10-04 09:13:59,726 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:13:59,726 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 36, 1, 1, 1, 1, 1] [2018-10-04 09:13:59,726 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:13:59,726 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:13:59,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1835041505, now seen corresponding path program 71 times [2018-10-04 09:13:59,726 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:13:59,726 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:13:59,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:59,727 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:13:59,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:13:59,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:01,379 INFO L134 CoverageAnalysis]: Checked inductivity of 3330 backedges. 2664 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:01,379 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:14:01,379 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:14:01,386 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:14:01,504 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-10-04 09:14:01,504 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:14:01,508 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:14:01,542 INFO L134 CoverageAnalysis]: Checked inductivity of 3330 backedges. 2664 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:01,564 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:14:01,564 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-10-04 09:14:01,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-04 09:14:01,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-04 09:14:01,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1481, Invalid=4219, Unknown=0, NotChecked=0, Total=5700 [2018-10-04 09:14:01,565 INFO L87 Difference]: Start difference. First operand 190 states and 192 transitions. Second operand 76 states. [2018-10-04 09:14:04,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:14:04,519 INFO L93 Difference]: Finished difference Result 346 states and 350 transitions. [2018-10-04 09:14:04,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-04 09:14:04,520 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 187 [2018-10-04 09:14:04,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:14:04,521 INFO L225 Difference]: With dead ends: 346 [2018-10-04 09:14:04,521 INFO L226 Difference]: Without dead ends: 191 [2018-10-04 09:14:04,522 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1962 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2961, Invalid=9695, Unknown=0, NotChecked=0, Total=12656 [2018-10-04 09:14:04,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-10-04 09:14:04,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-10-04 09:14:04,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-10-04 09:14:04,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 193 transitions. [2018-10-04 09:14:04,545 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 193 transitions. Word has length 187 [2018-10-04 09:14:04,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:14:04,545 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 193 transitions. [2018-10-04 09:14:04,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-04 09:14:04,545 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 193 transitions. [2018-10-04 09:14:04,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-10-04 09:14:04,546 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:14:04,546 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 37, 36, 36, 1, 1, 1, 1, 1] [2018-10-04 09:14:04,546 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:14:04,546 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:14:04,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1521017350, now seen corresponding path program 72 times [2018-10-04 09:14:04,547 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:14:04,547 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:14:04,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:04,547 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:14:04,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:04,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:05,200 INFO L134 CoverageAnalysis]: Checked inductivity of 3367 backedges. 775 proven. 2592 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:05,200 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:14:05,200 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:14:05,207 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:14:05,341 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-04 09:14:05,341 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:14:05,346 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:14:05,391 INFO L134 CoverageAnalysis]: Checked inductivity of 3367 backedges. 775 proven. 2592 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:05,413 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:14:05,413 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-04 09:14:05,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-04 09:14:05,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-04 09:14:05,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-04 09:14:05,414 INFO L87 Difference]: Start difference. First operand 191 states and 193 transitions. Second operand 40 states. [2018-10-04 09:14:05,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:14:05,636 INFO L93 Difference]: Finished difference Result 205 states and 208 transitions. [2018-10-04 09:14:05,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-04 09:14:05,637 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 188 [2018-10-04 09:14:05,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:14:05,638 INFO L225 Difference]: With dead ends: 205 [2018-10-04 09:14:05,638 INFO L226 Difference]: Without dead ends: 199 [2018-10-04 09:14:05,638 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-04 09:14:05,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-10-04 09:14:05,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 195. [2018-10-04 09:14:05,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-10-04 09:14:05,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 197 transitions. [2018-10-04 09:14:05,662 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 197 transitions. Word has length 188 [2018-10-04 09:14:05,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:14:05,663 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 197 transitions. [2018-10-04 09:14:05,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-04 09:14:05,663 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 197 transitions. [2018-10-04 09:14:05,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-10-04 09:14:05,664 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:14:05,664 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 37, 1, 1, 1, 1, 1] [2018-10-04 09:14:05,664 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:14:05,664 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:14:05,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1787388540, now seen corresponding path program 73 times [2018-10-04 09:14:05,665 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:14:05,665 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:14:05,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:05,665 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:14:05,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:05,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:07,465 INFO L134 CoverageAnalysis]: Checked inductivity of 3515 backedges. 2812 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:07,465 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:14:07,465 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:14:07,473 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:14:07,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:07,568 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:14:07,611 INFO L134 CoverageAnalysis]: Checked inductivity of 3515 backedges. 2812 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:07,631 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:14:07,632 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-10-04 09:14:07,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-04 09:14:07,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-04 09:14:07,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1559, Invalid=4447, Unknown=0, NotChecked=0, Total=6006 [2018-10-04 09:14:07,633 INFO L87 Difference]: Start difference. First operand 195 states and 197 transitions. Second operand 78 states. [2018-10-04 09:14:10,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:14:10,187 INFO L93 Difference]: Finished difference Result 355 states and 359 transitions. [2018-10-04 09:14:10,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-04 09:14:10,188 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 192 [2018-10-04 09:14:10,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:14:10,188 INFO L225 Difference]: With dead ends: 355 [2018-10-04 09:14:10,188 INFO L226 Difference]: Without dead ends: 196 [2018-10-04 09:14:10,190 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2072 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3117, Invalid=10223, Unknown=0, NotChecked=0, Total=13340 [2018-10-04 09:14:10,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2018-10-04 09:14:10,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2018-10-04 09:14:10,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-10-04 09:14:10,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 198 transitions. [2018-10-04 09:14:10,211 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 198 transitions. Word has length 192 [2018-10-04 09:14:10,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:14:10,211 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 198 transitions. [2018-10-04 09:14:10,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-04 09:14:10,211 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 198 transitions. [2018-10-04 09:14:10,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2018-10-04 09:14:10,212 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:14:10,212 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 38, 37, 37, 1, 1, 1, 1, 1] [2018-10-04 09:14:10,212 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:14:10,213 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:14:10,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1861088757, now seen corresponding path program 74 times [2018-10-04 09:14:10,213 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:14:10,213 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:14:10,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:10,214 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:14:10,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:10,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:10,903 INFO L134 CoverageAnalysis]: Checked inductivity of 3553 backedges. 815 proven. 2738 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:10,903 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:14:10,903 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:14:10,927 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:14:11,019 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:14:11,019 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:14:11,023 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:14:11,059 INFO L134 CoverageAnalysis]: Checked inductivity of 3553 backedges. 815 proven. 2738 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:11,079 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:14:11,079 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-04 09:14:11,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-04 09:14:11,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-04 09:14:11,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-04 09:14:11,080 INFO L87 Difference]: Start difference. First operand 196 states and 198 transitions. Second operand 41 states. [2018-10-04 09:14:11,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:14:11,304 INFO L93 Difference]: Finished difference Result 210 states and 213 transitions. [2018-10-04 09:14:11,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-04 09:14:11,305 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 193 [2018-10-04 09:14:11,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:14:11,306 INFO L225 Difference]: With dead ends: 210 [2018-10-04 09:14:11,306 INFO L226 Difference]: Without dead ends: 204 [2018-10-04 09:14:11,306 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-04 09:14:11,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2018-10-04 09:14:11,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 200. [2018-10-04 09:14:11,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2018-10-04 09:14:11,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 202 transitions. [2018-10-04 09:14:11,325 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 202 transitions. Word has length 193 [2018-10-04 09:14:11,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:14:11,325 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 202 transitions. [2018-10-04 09:14:11,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-04 09:14:11,325 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 202 transitions. [2018-10-04 09:14:11,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-10-04 09:14:11,326 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:14:11,326 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 38, 1, 1, 1, 1, 1] [2018-10-04 09:14:11,326 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:14:11,326 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:14:11,327 INFO L82 PathProgramCache]: Analyzing trace with hash -315300117, now seen corresponding path program 75 times [2018-10-04 09:14:11,327 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:14:11,327 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:14:11,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:11,327 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:14:11,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:11,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:13,128 INFO L134 CoverageAnalysis]: Checked inductivity of 3705 backedges. 2964 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:13,128 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:14:13,128 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:14:13,136 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:14:13,285 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-10-04 09:14:13,286 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:14:13,290 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:14:13,335 INFO L134 CoverageAnalysis]: Checked inductivity of 3705 backedges. 2964 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:13,365 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:14:13,365 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-10-04 09:14:13,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-04 09:14:13,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-04 09:14:13,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1639, Invalid=4681, Unknown=0, NotChecked=0, Total=6320 [2018-10-04 09:14:13,367 INFO L87 Difference]: Start difference. First operand 200 states and 202 transitions. Second operand 80 states. [2018-10-04 09:14:16,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:14:16,713 INFO L93 Difference]: Finished difference Result 364 states and 368 transitions. [2018-10-04 09:14:16,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-04 09:14:16,713 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 197 [2018-10-04 09:14:16,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:14:16,715 INFO L225 Difference]: With dead ends: 364 [2018-10-04 09:14:16,715 INFO L226 Difference]: Without dead ends: 201 [2018-10-04 09:14:16,715 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2185 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3277, Invalid=10765, Unknown=0, NotChecked=0, Total=14042 [2018-10-04 09:14:16,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-10-04 09:14:16,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2018-10-04 09:14:16,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-10-04 09:14:16,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 203 transitions. [2018-10-04 09:14:16,740 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 203 transitions. Word has length 197 [2018-10-04 09:14:16,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:14:16,740 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 203 transitions. [2018-10-04 09:14:16,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-04 09:14:16,740 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 203 transitions. [2018-10-04 09:14:16,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-10-04 09:14:16,741 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:14:16,741 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 39, 38, 38, 1, 1, 1, 1, 1] [2018-10-04 09:14:16,741 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:14:16,741 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:14:16,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1372678382, now seen corresponding path program 76 times [2018-10-04 09:14:16,742 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:14:16,742 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:14:16,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:16,742 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:14:16,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:16,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:17,432 INFO L134 CoverageAnalysis]: Checked inductivity of 3744 backedges. 856 proven. 2888 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:17,432 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:14:17,433 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:14:17,441 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:14:17,537 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:14:17,537 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:14:17,544 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:14:17,580 INFO L134 CoverageAnalysis]: Checked inductivity of 3744 backedges. 856 proven. 2888 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:17,600 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:14:17,601 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-04 09:14:17,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-04 09:14:17,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-04 09:14:17,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-04 09:14:17,601 INFO L87 Difference]: Start difference. First operand 201 states and 203 transitions. Second operand 42 states. [2018-10-04 09:14:17,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:14:17,870 INFO L93 Difference]: Finished difference Result 215 states and 218 transitions. [2018-10-04 09:14:17,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-04 09:14:17,880 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 198 [2018-10-04 09:14:17,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:14:17,881 INFO L225 Difference]: With dead ends: 215 [2018-10-04 09:14:17,881 INFO L226 Difference]: Without dead ends: 209 [2018-10-04 09:14:17,882 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-04 09:14:17,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-10-04 09:14:17,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 205. [2018-10-04 09:14:17,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-10-04 09:14:17,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 207 transitions. [2018-10-04 09:14:17,907 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 207 transitions. Word has length 198 [2018-10-04 09:14:17,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:14:17,907 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 207 transitions. [2018-10-04 09:14:17,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-04 09:14:17,907 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 207 transitions. [2018-10-04 09:14:17,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-10-04 09:14:17,908 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:14:17,908 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 39, 1, 1, 1, 1, 1] [2018-10-04 09:14:17,909 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:14:17,909 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:14:17,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1792389512, now seen corresponding path program 77 times [2018-10-04 09:14:17,909 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:14:17,909 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:14:17,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:17,910 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:14:17,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:17,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:20,037 INFO L134 CoverageAnalysis]: Checked inductivity of 3900 backedges. 3120 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:20,037 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:14:20,038 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:14:20,044 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:14:20,180 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-10-04 09:14:20,180 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:14:20,185 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:14:20,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3900 backedges. 3120 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:20,262 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:14:20,262 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-10-04 09:14:20,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-04 09:14:20,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-04 09:14:20,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1721, Invalid=4921, Unknown=0, NotChecked=0, Total=6642 [2018-10-04 09:14:20,263 INFO L87 Difference]: Start difference. First operand 205 states and 207 transitions. Second operand 82 states. [2018-10-04 09:14:22,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:14:22,714 INFO L93 Difference]: Finished difference Result 373 states and 377 transitions. [2018-10-04 09:14:22,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-04 09:14:22,714 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 202 [2018-10-04 09:14:22,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:14:22,715 INFO L225 Difference]: With dead ends: 373 [2018-10-04 09:14:22,715 INFO L226 Difference]: Without dead ends: 206 [2018-10-04 09:14:22,716 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2301 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3441, Invalid=11321, Unknown=0, NotChecked=0, Total=14762 [2018-10-04 09:14:22,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2018-10-04 09:14:22,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2018-10-04 09:14:22,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2018-10-04 09:14:22,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 208 transitions. [2018-10-04 09:14:22,742 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 208 transitions. Word has length 202 [2018-10-04 09:14:22,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:14:22,742 INFO L480 AbstractCegarLoop]: Abstraction has 206 states and 208 transitions. [2018-10-04 09:14:22,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-04 09:14:22,742 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 208 transitions. [2018-10-04 09:14:22,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2018-10-04 09:14:22,743 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:14:22,743 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 40, 39, 39, 1, 1, 1, 1, 1] [2018-10-04 09:14:22,743 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:14:22,743 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:14:22,744 INFO L82 PathProgramCache]: Analyzing trace with hash -185138751, now seen corresponding path program 78 times [2018-10-04 09:14:22,744 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:14:22,744 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:14:22,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:22,745 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:14:22,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:22,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:23,477 INFO L134 CoverageAnalysis]: Checked inductivity of 3940 backedges. 898 proven. 3042 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:23,478 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:14:23,478 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:14:23,485 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:14:23,623 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2018-10-04 09:14:23,623 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:14:23,627 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:14:23,667 INFO L134 CoverageAnalysis]: Checked inductivity of 3940 backedges. 898 proven. 3042 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:23,687 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:14:23,688 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-04 09:14:23,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-04 09:14:23,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-04 09:14:23,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-04 09:14:23,689 INFO L87 Difference]: Start difference. First operand 206 states and 208 transitions. Second operand 43 states. [2018-10-04 09:14:23,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:14:23,947 INFO L93 Difference]: Finished difference Result 220 states and 223 transitions. [2018-10-04 09:14:23,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-04 09:14:23,953 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 203 [2018-10-04 09:14:23,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:14:23,954 INFO L225 Difference]: With dead ends: 220 [2018-10-04 09:14:23,954 INFO L226 Difference]: Without dead ends: 214 [2018-10-04 09:14:23,955 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-04 09:14:23,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2018-10-04 09:14:23,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 210. [2018-10-04 09:14:23,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2018-10-04 09:14:23,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 212 transitions. [2018-10-04 09:14:23,981 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 212 transitions. Word has length 203 [2018-10-04 09:14:23,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:14:23,981 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 212 transitions. [2018-10-04 09:14:23,981 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-04 09:14:23,982 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 212 transitions. [2018-10-04 09:14:23,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-10-04 09:14:23,982 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:14:23,983 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 40, 40, 40, 1, 1, 1, 1, 1] [2018-10-04 09:14:23,983 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:14:23,983 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:14:23,983 INFO L82 PathProgramCache]: Analyzing trace with hash -319083337, now seen corresponding path program 79 times [2018-10-04 09:14:23,983 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:14:23,983 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:14:23,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:23,984 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:14:23,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:24,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:26,234 INFO L134 CoverageAnalysis]: Checked inductivity of 4100 backedges. 3280 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:26,234 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:14:26,234 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:14:26,242 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:14:26,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:26,336 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:14:26,381 INFO L134 CoverageAnalysis]: Checked inductivity of 4100 backedges. 3280 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:26,401 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:14:26,401 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-10-04 09:14:26,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-04 09:14:26,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-04 09:14:26,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1805, Invalid=5167, Unknown=0, NotChecked=0, Total=6972 [2018-10-04 09:14:26,402 INFO L87 Difference]: Start difference. First operand 210 states and 212 transitions. Second operand 84 states. [2018-10-04 09:14:28,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:14:28,815 INFO L93 Difference]: Finished difference Result 382 states and 386 transitions. [2018-10-04 09:14:28,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-10-04 09:14:28,815 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 207 [2018-10-04 09:14:28,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:14:28,816 INFO L225 Difference]: With dead ends: 382 [2018-10-04 09:14:28,816 INFO L226 Difference]: Without dead ends: 211 [2018-10-04 09:14:28,817 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2420 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3609, Invalid=11891, Unknown=0, NotChecked=0, Total=15500 [2018-10-04 09:14:28,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-10-04 09:14:28,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2018-10-04 09:14:28,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-10-04 09:14:28,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 213 transitions. [2018-10-04 09:14:28,836 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 213 transitions. Word has length 207 [2018-10-04 09:14:28,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:14:28,837 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 213 transitions. [2018-10-04 09:14:28,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-04 09:14:28,837 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 213 transitions. [2018-10-04 09:14:28,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-10-04 09:14:28,837 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:14:28,837 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 41, 40, 40, 1, 1, 1, 1, 1] [2018-10-04 09:14:28,838 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:14:28,838 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:14:28,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1953503262, now seen corresponding path program 80 times [2018-10-04 09:14:28,838 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:14:28,838 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:14:28,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:28,839 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:14:28,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:28,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:29,919 INFO L134 CoverageAnalysis]: Checked inductivity of 4141 backedges. 941 proven. 3200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:29,920 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:14:29,920 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:14:29,926 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:14:30,021 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:14:30,021 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:14:30,025 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:14:30,065 INFO L134 CoverageAnalysis]: Checked inductivity of 4141 backedges. 941 proven. 3200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:30,085 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:14:30,085 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-04 09:14:30,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-04 09:14:30,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-04 09:14:30,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-04 09:14:30,086 INFO L87 Difference]: Start difference. First operand 211 states and 213 transitions. Second operand 44 states. [2018-10-04 09:14:30,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:14:30,333 INFO L93 Difference]: Finished difference Result 225 states and 228 transitions. [2018-10-04 09:14:30,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-04 09:14:30,333 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 208 [2018-10-04 09:14:30,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:14:30,334 INFO L225 Difference]: With dead ends: 225 [2018-10-04 09:14:30,334 INFO L226 Difference]: Without dead ends: 219 [2018-10-04 09:14:30,334 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-04 09:14:30,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-10-04 09:14:30,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 215. [2018-10-04 09:14:30,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2018-10-04 09:14:30,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 217 transitions. [2018-10-04 09:14:30,354 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 217 transitions. Word has length 208 [2018-10-04 09:14:30,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:14:30,354 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 217 transitions. [2018-10-04 09:14:30,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-04 09:14:30,354 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 217 transitions. [2018-10-04 09:14:30,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-10-04 09:14:30,355 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:14:30,355 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 41, 41, 41, 1, 1, 1, 1, 1] [2018-10-04 09:14:30,355 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:14:30,356 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:14:30,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1125633172, now seen corresponding path program 81 times [2018-10-04 09:14:30,356 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:14:30,356 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:14:30,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:30,357 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:14:30,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:30,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:32,368 INFO L134 CoverageAnalysis]: Checked inductivity of 4305 backedges. 3444 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:32,368 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:14:32,368 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:14:32,375 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:14:32,536 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-10-04 09:14:32,536 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:14:32,540 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:14:32,581 INFO L134 CoverageAnalysis]: Checked inductivity of 4305 backedges. 3444 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:32,602 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:14:32,602 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-10-04 09:14:32,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-04 09:14:32,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-04 09:14:32,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=5419, Unknown=0, NotChecked=0, Total=7310 [2018-10-04 09:14:32,603 INFO L87 Difference]: Start difference. First operand 215 states and 217 transitions. Second operand 86 states. [2018-10-04 09:14:35,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:14:35,351 INFO L93 Difference]: Finished difference Result 391 states and 395 transitions. [2018-10-04 09:14:35,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-04 09:14:35,351 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 212 [2018-10-04 09:14:35,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:14:35,352 INFO L225 Difference]: With dead ends: 391 [2018-10-04 09:14:35,352 INFO L226 Difference]: Without dead ends: 216 [2018-10-04 09:14:35,353 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2542 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3781, Invalid=12475, Unknown=0, NotChecked=0, Total=16256 [2018-10-04 09:14:35,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2018-10-04 09:14:35,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2018-10-04 09:14:35,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2018-10-04 09:14:35,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 218 transitions. [2018-10-04 09:14:35,374 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 218 transitions. Word has length 212 [2018-10-04 09:14:35,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:14:35,375 INFO L480 AbstractCegarLoop]: Abstraction has 216 states and 218 transitions. [2018-10-04 09:14:35,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-04 09:14:35,375 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 218 transitions. [2018-10-04 09:14:35,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2018-10-04 09:14:35,376 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:14:35,376 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 42, 41, 41, 1, 1, 1, 1, 1] [2018-10-04 09:14:35,376 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:14:35,376 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:14:35,376 INFO L82 PathProgramCache]: Analyzing trace with hash -155129459, now seen corresponding path program 82 times [2018-10-04 09:14:35,377 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:14:35,377 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:14:35,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:35,377 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:14:35,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:35,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:36,203 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 985 proven. 3362 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:36,203 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:14:36,203 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:14:36,213 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:14:36,316 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:14:36,317 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:14:36,324 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:14:36,379 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 985 proven. 3362 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:36,408 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:14:36,408 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-04 09:14:36,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-04 09:14:36,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-04 09:14:36,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-04 09:14:36,410 INFO L87 Difference]: Start difference. First operand 216 states and 218 transitions. Second operand 45 states. [2018-10-04 09:14:36,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:14:36,766 INFO L93 Difference]: Finished difference Result 230 states and 233 transitions. [2018-10-04 09:14:36,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-04 09:14:36,766 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 213 [2018-10-04 09:14:36,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:14:36,767 INFO L225 Difference]: With dead ends: 230 [2018-10-04 09:14:36,768 INFO L226 Difference]: Without dead ends: 224 [2018-10-04 09:14:36,768 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-04 09:14:36,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2018-10-04 09:14:36,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 220. [2018-10-04 09:14:36,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2018-10-04 09:14:36,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 222 transitions. [2018-10-04 09:14:36,790 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 222 transitions. Word has length 213 [2018-10-04 09:14:36,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:14:36,791 INFO L480 AbstractCegarLoop]: Abstraction has 220 states and 222 transitions. [2018-10-04 09:14:36,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-04 09:14:36,791 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 222 transitions. [2018-10-04 09:14:36,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2018-10-04 09:14:36,792 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:14:36,792 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 42, 42, 42, 1, 1, 1, 1, 1] [2018-10-04 09:14:36,793 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:14:36,793 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:14:36,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1531687293, now seen corresponding path program 83 times [2018-10-04 09:14:36,793 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:14:36,793 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:14:36,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:36,794 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:14:36,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:36,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:39,080 INFO L134 CoverageAnalysis]: Checked inductivity of 4515 backedges. 3612 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:39,080 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:14:39,080 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:14:39,090 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:14:39,249 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-10-04 09:14:39,249 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:14:39,255 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:14:39,297 INFO L134 CoverageAnalysis]: Checked inductivity of 4515 backedges. 3612 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:39,319 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:14:39,319 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-10-04 09:14:39,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-04 09:14:39,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-04 09:14:39,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1979, Invalid=5677, Unknown=0, NotChecked=0, Total=7656 [2018-10-04 09:14:39,321 INFO L87 Difference]: Start difference. First operand 220 states and 222 transitions. Second operand 88 states. [2018-10-04 09:14:42,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:14:42,321 INFO L93 Difference]: Finished difference Result 400 states and 404 transitions. [2018-10-04 09:14:42,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-04 09:14:42,322 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 217 [2018-10-04 09:14:42,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:14:42,322 INFO L225 Difference]: With dead ends: 400 [2018-10-04 09:14:42,323 INFO L226 Difference]: Without dead ends: 221 [2018-10-04 09:14:42,323 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2667 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3957, Invalid=13073, Unknown=0, NotChecked=0, Total=17030 [2018-10-04 09:14:42,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-10-04 09:14:42,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2018-10-04 09:14:42,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-10-04 09:14:42,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 223 transitions. [2018-10-04 09:14:42,344 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 223 transitions. Word has length 217 [2018-10-04 09:14:42,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:14:42,344 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 223 transitions. [2018-10-04 09:14:42,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-04 09:14:42,345 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 223 transitions. [2018-10-04 09:14:42,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-10-04 09:14:42,345 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:14:42,346 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 43, 42, 42, 1, 1, 1, 1, 1] [2018-10-04 09:14:42,346 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:14:42,346 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:14:42,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1128490282, now seen corresponding path program 84 times [2018-10-04 09:14:42,346 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:14:42,347 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:14:42,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:42,347 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:14:42,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:42,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:43,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4558 backedges. 1030 proven. 3528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:43,195 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:14:43,195 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:14:43,203 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:14:43,365 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-10-04 09:14:43,365 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:14:43,371 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:14:43,414 INFO L134 CoverageAnalysis]: Checked inductivity of 4558 backedges. 1030 proven. 3528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:43,436 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:14:43,436 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-04 09:14:43,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-04 09:14:43,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-04 09:14:43,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-04 09:14:43,438 INFO L87 Difference]: Start difference. First operand 221 states and 223 transitions. Second operand 46 states. [2018-10-04 09:14:43,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:14:43,719 INFO L93 Difference]: Finished difference Result 235 states and 238 transitions. [2018-10-04 09:14:43,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-04 09:14:43,719 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 218 [2018-10-04 09:14:43,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:14:43,721 INFO L225 Difference]: With dead ends: 235 [2018-10-04 09:14:43,721 INFO L226 Difference]: Without dead ends: 229 [2018-10-04 09:14:43,721 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-04 09:14:43,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2018-10-04 09:14:43,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 225. [2018-10-04 09:14:43,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2018-10-04 09:14:43,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 227 transitions. [2018-10-04 09:14:43,743 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 227 transitions. Word has length 218 [2018-10-04 09:14:43,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:14:43,743 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 227 transitions. [2018-10-04 09:14:43,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-04 09:14:43,743 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 227 transitions. [2018-10-04 09:14:43,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-10-04 09:14:43,744 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:14:43,744 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 43, 43, 43, 1, 1, 1, 1, 1] [2018-10-04 09:14:43,744 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:14:43,744 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:14:43,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1373260896, now seen corresponding path program 85 times [2018-10-04 09:14:43,744 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:14:43,744 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:14:43,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:43,745 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:14:43,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:43,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:46,407 INFO L134 CoverageAnalysis]: Checked inductivity of 4730 backedges. 3784 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:46,407 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:14:46,407 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:14:46,415 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:14:46,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:46,523 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:14:46,564 INFO L134 CoverageAnalysis]: Checked inductivity of 4730 backedges. 3784 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:46,584 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:14:46,584 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-10-04 09:14:46,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-04 09:14:46,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-04 09:14:46,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2069, Invalid=5941, Unknown=0, NotChecked=0, Total=8010 [2018-10-04 09:14:46,585 INFO L87 Difference]: Start difference. First operand 225 states and 227 transitions. Second operand 90 states. [2018-10-04 09:14:49,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:14:49,442 INFO L93 Difference]: Finished difference Result 409 states and 413 transitions. [2018-10-04 09:14:49,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-04 09:14:49,442 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 222 [2018-10-04 09:14:49,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:14:49,443 INFO L225 Difference]: With dead ends: 409 [2018-10-04 09:14:49,443 INFO L226 Difference]: Without dead ends: 226 [2018-10-04 09:14:49,445 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2795 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=4137, Invalid=13685, Unknown=0, NotChecked=0, Total=17822 [2018-10-04 09:14:49,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2018-10-04 09:14:49,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2018-10-04 09:14:49,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2018-10-04 09:14:49,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 228 transitions. [2018-10-04 09:14:49,474 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 228 transitions. Word has length 222 [2018-10-04 09:14:49,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:14:49,475 INFO L480 AbstractCegarLoop]: Abstraction has 226 states and 228 transitions. [2018-10-04 09:14:49,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-04 09:14:49,475 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 228 transitions. [2018-10-04 09:14:49,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2018-10-04 09:14:49,476 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:14:49,476 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 44, 43, 43, 1, 1, 1, 1, 1] [2018-10-04 09:14:49,476 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:14:49,476 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:14:49,476 INFO L82 PathProgramCache]: Analyzing trace with hash 2022550873, now seen corresponding path program 86 times [2018-10-04 09:14:49,477 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:14:49,477 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:14:49,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:49,477 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:14:49,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:49,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:50,787 INFO L134 CoverageAnalysis]: Checked inductivity of 4774 backedges. 1076 proven. 3698 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:50,787 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:14:50,787 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:14:50,795 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:14:50,899 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:14:50,899 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:14:50,904 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:14:50,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4774 backedges. 1076 proven. 3698 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:50,967 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:14:50,967 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-04 09:14:50,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-04 09:14:50,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-04 09:14:50,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-04 09:14:50,968 INFO L87 Difference]: Start difference. First operand 226 states and 228 transitions. Second operand 47 states. [2018-10-04 09:14:51,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:14:51,266 INFO L93 Difference]: Finished difference Result 240 states and 243 transitions. [2018-10-04 09:14:51,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-04 09:14:51,267 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 223 [2018-10-04 09:14:51,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:14:51,268 INFO L225 Difference]: With dead ends: 240 [2018-10-04 09:14:51,268 INFO L226 Difference]: Without dead ends: 234 [2018-10-04 09:14:51,268 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-04 09:14:51,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2018-10-04 09:14:51,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 230. [2018-10-04 09:14:51,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2018-10-04 09:14:51,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 232 transitions. [2018-10-04 09:14:51,289 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 232 transitions. Word has length 223 [2018-10-04 09:14:51,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:14:51,289 INFO L480 AbstractCegarLoop]: Abstraction has 230 states and 232 transitions. [2018-10-04 09:14:51,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-04 09:14:51,290 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 232 transitions. [2018-10-04 09:14:51,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2018-10-04 09:14:51,290 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:14:51,290 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 44, 44, 44, 1, 1, 1, 1, 1] [2018-10-04 09:14:51,291 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:14:51,291 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:14:51,291 INFO L82 PathProgramCache]: Analyzing trace with hash 664947791, now seen corresponding path program 87 times [2018-10-04 09:14:51,291 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:14:51,291 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:14:51,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:51,291 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:14:51,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:51,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:53,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 3960 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:53,631 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:14:53,631 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:14:53,639 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:14:53,834 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-10-04 09:14:53,834 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:14:53,839 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:14:53,884 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 3960 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:53,905 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:14:53,906 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-10-04 09:14:53,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-04 09:14:53,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-04 09:14:53,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2161, Invalid=6211, Unknown=0, NotChecked=0, Total=8372 [2018-10-04 09:14:53,907 INFO L87 Difference]: Start difference. First operand 230 states and 232 transitions. Second operand 92 states. [2018-10-04 09:14:57,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:14:57,141 INFO L93 Difference]: Finished difference Result 418 states and 422 transitions. [2018-10-04 09:14:57,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-10-04 09:14:57,141 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 227 [2018-10-04 09:14:57,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:14:57,142 INFO L225 Difference]: With dead ends: 418 [2018-10-04 09:14:57,142 INFO L226 Difference]: Without dead ends: 231 [2018-10-04 09:14:57,144 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2926 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4321, Invalid=14311, Unknown=0, NotChecked=0, Total=18632 [2018-10-04 09:14:57,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2018-10-04 09:14:57,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2018-10-04 09:14:57,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2018-10-04 09:14:57,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 233 transitions. [2018-10-04 09:14:57,183 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 233 transitions. Word has length 227 [2018-10-04 09:14:57,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:14:57,183 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 233 transitions. [2018-10-04 09:14:57,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-10-04 09:14:57,183 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 233 transitions. [2018-10-04 09:14:57,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2018-10-04 09:14:57,184 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:14:57,184 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 45, 44, 44, 1, 1, 1, 1, 1] [2018-10-04 09:14:57,184 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:14:57,185 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:14:57,185 INFO L82 PathProgramCache]: Analyzing trace with hash -402751946, now seen corresponding path program 88 times [2018-10-04 09:14:57,185 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:14:57,185 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:14:57,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:57,185 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:14:57,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:57,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:14:58,097 INFO L134 CoverageAnalysis]: Checked inductivity of 4995 backedges. 1123 proven. 3872 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:58,098 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:14:58,098 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:14:58,105 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:14:58,215 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:14:58,215 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:14:58,223 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:14:58,269 INFO L134 CoverageAnalysis]: Checked inductivity of 4995 backedges. 1123 proven. 3872 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:14:58,290 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:14:58,290 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-04 09:14:58,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-04 09:14:58,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-04 09:14:58,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-04 09:14:58,291 INFO L87 Difference]: Start difference. First operand 231 states and 233 transitions. Second operand 48 states. [2018-10-04 09:14:58,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:14:58,629 INFO L93 Difference]: Finished difference Result 245 states and 248 transitions. [2018-10-04 09:14:58,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-04 09:14:58,636 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 228 [2018-10-04 09:14:58,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:14:58,637 INFO L225 Difference]: With dead ends: 245 [2018-10-04 09:14:58,637 INFO L226 Difference]: Without dead ends: 239 [2018-10-04 09:14:58,638 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-04 09:14:58,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2018-10-04 09:14:58,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 235. [2018-10-04 09:14:58,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2018-10-04 09:14:58,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 237 transitions. [2018-10-04 09:14:58,663 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 237 transitions. Word has length 228 [2018-10-04 09:14:58,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:14:58,664 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 237 transitions. [2018-10-04 09:14:58,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-04 09:14:58,664 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 237 transitions. [2018-10-04 09:14:58,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2018-10-04 09:14:58,664 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:14:58,665 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 45, 45, 45, 1, 1, 1, 1, 1] [2018-10-04 09:14:58,665 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:14:58,665 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:14:58,665 INFO L82 PathProgramCache]: Analyzing trace with hash -564828500, now seen corresponding path program 89 times [2018-10-04 09:14:58,665 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:14:58,665 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:14:58,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:58,666 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:14:58,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:14:58,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:15:01,488 INFO L134 CoverageAnalysis]: Checked inductivity of 5175 backedges. 4140 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:01,488 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:15:01,488 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:15:01,496 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:15:01,660 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-10-04 09:15:01,660 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:15:01,666 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:15:01,717 INFO L134 CoverageAnalysis]: Checked inductivity of 5175 backedges. 4140 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:01,738 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:15:01,739 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-10-04 09:15:01,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-10-04 09:15:01,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-10-04 09:15:01,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2255, Invalid=6487, Unknown=0, NotChecked=0, Total=8742 [2018-10-04 09:15:01,740 INFO L87 Difference]: Start difference. First operand 235 states and 237 transitions. Second operand 94 states. [2018-10-04 09:15:04,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:15:04,957 INFO L93 Difference]: Finished difference Result 427 states and 431 transitions. [2018-10-04 09:15:04,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-10-04 09:15:04,957 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 232 [2018-10-04 09:15:04,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:15:04,958 INFO L225 Difference]: With dead ends: 427 [2018-10-04 09:15:04,958 INFO L226 Difference]: Without dead ends: 236 [2018-10-04 09:15:04,959 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3060 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=4509, Invalid=14951, Unknown=0, NotChecked=0, Total=19460 [2018-10-04 09:15:04,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2018-10-04 09:15:04,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2018-10-04 09:15:04,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2018-10-04 09:15:04,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 238 transitions. [2018-10-04 09:15:04,989 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 238 transitions. Word has length 232 [2018-10-04 09:15:04,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:15:04,989 INFO L480 AbstractCegarLoop]: Abstraction has 236 states and 238 transitions. [2018-10-04 09:15:04,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-10-04 09:15:04,989 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 238 transitions. [2018-10-04 09:15:04,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2018-10-04 09:15:04,990 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:15:04,990 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 46, 45, 45, 1, 1, 1, 1, 1] [2018-10-04 09:15:04,990 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:15:04,990 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:15:04,991 INFO L82 PathProgramCache]: Analyzing trace with hash 522145061, now seen corresponding path program 90 times [2018-10-04 09:15:04,991 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:15:04,991 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:15:04,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:04,991 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:15:04,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:05,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:15:06,280 INFO L134 CoverageAnalysis]: Checked inductivity of 5221 backedges. 1171 proven. 4050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:06,280 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:15:06,280 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:15:06,288 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:15:06,455 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2018-10-04 09:15:06,455 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:15:06,461 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:15:06,509 INFO L134 CoverageAnalysis]: Checked inductivity of 5221 backedges. 1171 proven. 4050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:06,531 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:15:06,531 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-10-04 09:15:06,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-04 09:15:06,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-04 09:15:06,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-04 09:15:06,532 INFO L87 Difference]: Start difference. First operand 236 states and 238 transitions. Second operand 49 states. [2018-10-04 09:15:06,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:15:06,876 INFO L93 Difference]: Finished difference Result 250 states and 253 transitions. [2018-10-04 09:15:06,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-04 09:15:06,876 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 233 [2018-10-04 09:15:06,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:15:06,877 INFO L225 Difference]: With dead ends: 250 [2018-10-04 09:15:06,877 INFO L226 Difference]: Without dead ends: 244 [2018-10-04 09:15:06,878 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-04 09:15:06,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2018-10-04 09:15:06,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 240. [2018-10-04 09:15:06,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2018-10-04 09:15:06,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 242 transitions. [2018-10-04 09:15:06,901 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 242 transitions. Word has length 233 [2018-10-04 09:15:06,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:15:06,901 INFO L480 AbstractCegarLoop]: Abstraction has 240 states and 242 transitions. [2018-10-04 09:15:06,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-04 09:15:06,901 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 242 transitions. [2018-10-04 09:15:06,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2018-10-04 09:15:06,902 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:15:06,902 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 46, 46, 46, 1, 1, 1, 1, 1] [2018-10-04 09:15:06,902 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:15:06,903 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:15:06,903 INFO L82 PathProgramCache]: Analyzing trace with hash -377018853, now seen corresponding path program 91 times [2018-10-04 09:15:06,903 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:15:06,903 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:15:06,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:06,904 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:15:06,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:06,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:15:09,945 INFO L134 CoverageAnalysis]: Checked inductivity of 5405 backedges. 4324 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:09,945 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:15:09,946 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:15:09,952 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:15:10,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:15:10,067 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:15:10,116 INFO L134 CoverageAnalysis]: Checked inductivity of 5405 backedges. 4324 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:10,136 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:15:10,136 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-10-04 09:15:10,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-04 09:15:10,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-04 09:15:10,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2351, Invalid=6769, Unknown=0, NotChecked=0, Total=9120 [2018-10-04 09:15:10,137 INFO L87 Difference]: Start difference. First operand 240 states and 242 transitions. Second operand 96 states. [2018-10-04 09:15:13,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:15:13,526 INFO L93 Difference]: Finished difference Result 436 states and 440 transitions. [2018-10-04 09:15:13,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-04 09:15:13,526 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 237 [2018-10-04 09:15:13,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:15:13,527 INFO L225 Difference]: With dead ends: 436 [2018-10-04 09:15:13,527 INFO L226 Difference]: Without dead ends: 241 [2018-10-04 09:15:13,528 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3197 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=4701, Invalid=15605, Unknown=0, NotChecked=0, Total=20306 [2018-10-04 09:15:13,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2018-10-04 09:15:13,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2018-10-04 09:15:13,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2018-10-04 09:15:13,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 243 transitions. [2018-10-04 09:15:13,552 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 243 transitions. Word has length 237 [2018-10-04 09:15:13,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:15:13,553 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 243 transitions. [2018-10-04 09:15:13,553 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-04 09:15:13,553 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 243 transitions. [2018-10-04 09:15:13,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-10-04 09:15:13,553 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:15:13,554 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 47, 46, 46, 1, 1, 1, 1, 1] [2018-10-04 09:15:13,554 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:15:13,554 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:15:13,554 INFO L82 PathProgramCache]: Analyzing trace with hash 125264706, now seen corresponding path program 92 times [2018-10-04 09:15:13,554 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:15:13,554 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:15:13,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:13,555 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:15:13,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:13,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:15:14,561 INFO L134 CoverageAnalysis]: Checked inductivity of 5452 backedges. 1220 proven. 4232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:14,562 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:15:14,562 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:15:14,569 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:15:14,676 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:15:14,676 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:15:14,681 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:15:14,731 INFO L134 CoverageAnalysis]: Checked inductivity of 5452 backedges. 1220 proven. 4232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:14,752 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:15:14,752 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-04 09:15:14,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-04 09:15:14,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-04 09:15:14,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-04 09:15:14,753 INFO L87 Difference]: Start difference. First operand 241 states and 243 transitions. Second operand 50 states. [2018-10-04 09:15:15,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:15:15,106 INFO L93 Difference]: Finished difference Result 255 states and 258 transitions. [2018-10-04 09:15:15,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-04 09:15:15,106 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 238 [2018-10-04 09:15:15,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:15:15,107 INFO L225 Difference]: With dead ends: 255 [2018-10-04 09:15:15,107 INFO L226 Difference]: Without dead ends: 249 [2018-10-04 09:15:15,108 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-04 09:15:15,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2018-10-04 09:15:15,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 245. [2018-10-04 09:15:15,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2018-10-04 09:15:15,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 247 transitions. [2018-10-04 09:15:15,134 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 247 transitions. Word has length 238 [2018-10-04 09:15:15,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:15:15,135 INFO L480 AbstractCegarLoop]: Abstraction has 245 states and 247 transitions. [2018-10-04 09:15:15,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-04 09:15:15,135 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 247 transitions. [2018-10-04 09:15:15,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2018-10-04 09:15:15,136 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:15:15,136 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 47, 47, 47, 1, 1, 1, 1, 1] [2018-10-04 09:15:15,136 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:15:15,136 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:15:15,137 INFO L82 PathProgramCache]: Analyzing trace with hash 494724536, now seen corresponding path program 93 times [2018-10-04 09:15:15,137 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:15:15,137 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:15:15,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:15,137 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:15:15,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:15,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:15:18,023 INFO L134 CoverageAnalysis]: Checked inductivity of 5640 backedges. 4512 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:18,023 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:15:18,023 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:15:18,033 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:15:18,230 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-10-04 09:15:18,230 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:15:18,236 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:15:18,286 INFO L134 CoverageAnalysis]: Checked inductivity of 5640 backedges. 4512 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:18,306 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:15:18,307 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-10-04 09:15:18,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-10-04 09:15:18,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-10-04 09:15:18,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2449, Invalid=7057, Unknown=0, NotChecked=0, Total=9506 [2018-10-04 09:15:18,308 INFO L87 Difference]: Start difference. First operand 245 states and 247 transitions. Second operand 98 states. [2018-10-04 09:15:21,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:15:21,965 INFO L93 Difference]: Finished difference Result 445 states and 449 transitions. [2018-10-04 09:15:21,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-10-04 09:15:21,966 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 242 [2018-10-04 09:15:21,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:15:21,967 INFO L225 Difference]: With dead ends: 445 [2018-10-04 09:15:21,967 INFO L226 Difference]: Without dead ends: 246 [2018-10-04 09:15:21,968 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3337 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=4897, Invalid=16273, Unknown=0, NotChecked=0, Total=21170 [2018-10-04 09:15:21,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2018-10-04 09:15:21,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 246. [2018-10-04 09:15:21,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2018-10-04 09:15:21,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 248 transitions. [2018-10-04 09:15:21,992 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 248 transitions. Word has length 242 [2018-10-04 09:15:21,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:15:21,992 INFO L480 AbstractCegarLoop]: Abstraction has 246 states and 248 transitions. [2018-10-04 09:15:21,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-10-04 09:15:21,992 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 248 transitions. [2018-10-04 09:15:21,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-10-04 09:15:21,993 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:15:21,993 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 48, 47, 47, 1, 1, 1, 1, 1] [2018-10-04 09:15:21,993 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:15:21,993 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:15:21,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1883780879, now seen corresponding path program 94 times [2018-10-04 09:15:21,994 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:15:21,994 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:15:21,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:21,994 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:15:21,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:22,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:15:23,033 INFO L134 CoverageAnalysis]: Checked inductivity of 5688 backedges. 1270 proven. 4418 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:23,033 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:15:23,033 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:15:23,042 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:15:23,164 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:15:23,164 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:15:23,172 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:15:23,262 INFO L134 CoverageAnalysis]: Checked inductivity of 5688 backedges. 1270 proven. 4418 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:23,282 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:15:23,282 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-04 09:15:23,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-04 09:15:23,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-04 09:15:23,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-04 09:15:23,283 INFO L87 Difference]: Start difference. First operand 246 states and 248 transitions. Second operand 51 states. [2018-10-04 09:15:23,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:15:23,602 INFO L93 Difference]: Finished difference Result 260 states and 263 transitions. [2018-10-04 09:15:23,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-04 09:15:23,603 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 243 [2018-10-04 09:15:23,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:15:23,604 INFO L225 Difference]: With dead ends: 260 [2018-10-04 09:15:23,604 INFO L226 Difference]: Without dead ends: 254 [2018-10-04 09:15:23,604 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-04 09:15:23,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2018-10-04 09:15:23,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 250. [2018-10-04 09:15:23,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2018-10-04 09:15:23,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 252 transitions. [2018-10-04 09:15:23,629 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 252 transitions. Word has length 243 [2018-10-04 09:15:23,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:15:23,629 INFO L480 AbstractCegarLoop]: Abstraction has 250 states and 252 transitions. [2018-10-04 09:15:23,629 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-04 09:15:23,630 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 252 transitions. [2018-10-04 09:15:23,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2018-10-04 09:15:23,630 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:15:23,630 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 48, 48, 48, 1, 1, 1, 1, 1] [2018-10-04 09:15:23,631 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:15:23,631 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:15:23,631 INFO L82 PathProgramCache]: Analyzing trace with hash 514120679, now seen corresponding path program 95 times [2018-10-04 09:15:23,631 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:15:23,631 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:15:23,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:23,632 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:15:23,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:23,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:15:26,728 INFO L134 CoverageAnalysis]: Checked inductivity of 5880 backedges. 4704 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:26,728 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:15:26,729 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:15:26,738 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:15:26,906 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-10-04 09:15:26,906 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:15:26,913 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:15:26,965 INFO L134 CoverageAnalysis]: Checked inductivity of 5880 backedges. 4704 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:26,986 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:15:26,986 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-10-04 09:15:26,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-10-04 09:15:26,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-10-04 09:15:26,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2549, Invalid=7351, Unknown=0, NotChecked=0, Total=9900 [2018-10-04 09:15:26,987 INFO L87 Difference]: Start difference. First operand 250 states and 252 transitions. Second operand 100 states. [2018-10-04 09:15:30,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:15:30,585 INFO L93 Difference]: Finished difference Result 454 states and 458 transitions. [2018-10-04 09:15:30,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-10-04 09:15:30,585 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 247 [2018-10-04 09:15:30,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:15:30,586 INFO L225 Difference]: With dead ends: 454 [2018-10-04 09:15:30,587 INFO L226 Difference]: Without dead ends: 251 [2018-10-04 09:15:30,588 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3480 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=5097, Invalid=16955, Unknown=0, NotChecked=0, Total=22052 [2018-10-04 09:15:30,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2018-10-04 09:15:30,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2018-10-04 09:15:30,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2018-10-04 09:15:30,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 253 transitions. [2018-10-04 09:15:30,614 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 253 transitions. Word has length 247 [2018-10-04 09:15:30,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:15:30,614 INFO L480 AbstractCegarLoop]: Abstraction has 251 states and 253 transitions. [2018-10-04 09:15:30,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-10-04 09:15:30,614 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 253 transitions. [2018-10-04 09:15:30,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2018-10-04 09:15:30,615 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:15:30,615 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 49, 48, 48, 1, 1, 1, 1, 1] [2018-10-04 09:15:30,615 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:15:30,615 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:15:30,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1107028914, now seen corresponding path program 96 times [2018-10-04 09:15:30,616 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:15:30,616 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:15:30,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:30,616 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:15:30,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:30,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:15:31,971 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 1321 proven. 4608 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:31,971 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:15:31,971 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:15:31,979 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:15:32,159 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-10-04 09:15:32,160 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:15:32,165 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:15:32,218 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 1321 proven. 4608 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:32,240 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:15:32,240 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-04 09:15:32,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-04 09:15:32,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-04 09:15:32,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-04 09:15:32,241 INFO L87 Difference]: Start difference. First operand 251 states and 253 transitions. Second operand 52 states. [2018-10-04 09:15:32,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:15:32,579 INFO L93 Difference]: Finished difference Result 265 states and 268 transitions. [2018-10-04 09:15:32,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-04 09:15:32,580 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 248 [2018-10-04 09:15:32,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:15:32,581 INFO L225 Difference]: With dead ends: 265 [2018-10-04 09:15:32,581 INFO L226 Difference]: Without dead ends: 259 [2018-10-04 09:15:32,581 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-04 09:15:32,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2018-10-04 09:15:32,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 255. [2018-10-04 09:15:32,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2018-10-04 09:15:32,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 257 transitions. [2018-10-04 09:15:32,607 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 257 transitions. Word has length 248 [2018-10-04 09:15:32,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:15:32,607 INFO L480 AbstractCegarLoop]: Abstraction has 255 states and 257 transitions. [2018-10-04 09:15:32,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-04 09:15:32,607 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 257 transitions. [2018-10-04 09:15:32,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2018-10-04 09:15:32,608 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:15:32,608 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 49, 49, 49, 1, 1, 1, 1, 1] [2018-10-04 09:15:32,608 INFO L423 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:15:32,608 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:15:32,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1827811524, now seen corresponding path program 97 times [2018-10-04 09:15:32,609 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:15:32,609 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:15:32,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:32,609 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:15:32,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:32,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:15:35,404 INFO L134 CoverageAnalysis]: Checked inductivity of 6125 backedges. 4900 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:35,404 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:15:35,404 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:15:35,426 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:15:35,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:15:35,548 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:15:35,602 INFO L134 CoverageAnalysis]: Checked inductivity of 6125 backedges. 4900 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:35,622 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:15:35,622 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-10-04 09:15:35,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-10-04 09:15:35,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-10-04 09:15:35,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2651, Invalid=7651, Unknown=0, NotChecked=0, Total=10302 [2018-10-04 09:15:35,624 INFO L87 Difference]: Start difference. First operand 255 states and 257 transitions. Second operand 102 states. [2018-10-04 09:15:38,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:15:38,912 INFO L93 Difference]: Finished difference Result 463 states and 467 transitions. [2018-10-04 09:15:38,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-10-04 09:15:38,913 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 252 [2018-10-04 09:15:38,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:15:38,914 INFO L225 Difference]: With dead ends: 463 [2018-10-04 09:15:38,914 INFO L226 Difference]: Without dead ends: 256 [2018-10-04 09:15:38,915 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3626 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=5301, Invalid=17651, Unknown=0, NotChecked=0, Total=22952 [2018-10-04 09:15:38,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2018-10-04 09:15:38,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2018-10-04 09:15:38,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2018-10-04 09:15:38,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 258 transitions. [2018-10-04 09:15:38,946 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 258 transitions. Word has length 252 [2018-10-04 09:15:38,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:15:38,947 INFO L480 AbstractCegarLoop]: Abstraction has 256 states and 258 transitions. [2018-10-04 09:15:38,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-10-04 09:15:38,947 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 258 transitions. [2018-10-04 09:15:38,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2018-10-04 09:15:38,948 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:15:38,948 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 50, 49, 49, 1, 1, 1, 1, 1] [2018-10-04 09:15:38,948 INFO L423 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:15:38,948 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:15:38,948 INFO L82 PathProgramCache]: Analyzing trace with hash -803659587, now seen corresponding path program 98 times [2018-10-04 09:15:38,949 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:15:38,949 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:15:38,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:38,949 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:15:38,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:38,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:15:40,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6175 backedges. 1373 proven. 4802 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:40,140 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:15:40,140 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:15:40,148 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:15:40,267 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:15:40,267 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:15:40,271 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:15:40,326 INFO L134 CoverageAnalysis]: Checked inductivity of 6175 backedges. 1373 proven. 4802 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:40,347 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:15:40,348 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-04 09:15:40,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-04 09:15:40,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-04 09:15:40,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-04 09:15:40,349 INFO L87 Difference]: Start difference. First operand 256 states and 258 transitions. Second operand 53 states. [2018-10-04 09:15:40,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:15:40,666 INFO L93 Difference]: Finished difference Result 270 states and 273 transitions. [2018-10-04 09:15:40,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-04 09:15:40,667 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 253 [2018-10-04 09:15:40,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:15:40,668 INFO L225 Difference]: With dead ends: 270 [2018-10-04 09:15:40,668 INFO L226 Difference]: Without dead ends: 264 [2018-10-04 09:15:40,668 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-04 09:15:40,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2018-10-04 09:15:40,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 260. [2018-10-04 09:15:40,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2018-10-04 09:15:40,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 262 transitions. [2018-10-04 09:15:40,698 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 262 transitions. Word has length 253 [2018-10-04 09:15:40,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:15:40,698 INFO L480 AbstractCegarLoop]: Abstraction has 260 states and 262 transitions. [2018-10-04 09:15:40,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-04 09:15:40,699 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 262 transitions. [2018-10-04 09:15:40,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2018-10-04 09:15:40,699 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:15:40,699 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 50, 50, 50, 1, 1, 1, 1, 1] [2018-10-04 09:15:40,700 INFO L423 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:15:40,700 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:15:40,700 INFO L82 PathProgramCache]: Analyzing trace with hash 465399219, now seen corresponding path program 99 times [2018-10-04 09:15:40,700 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:15:40,700 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:15:40,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:40,701 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:15:40,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:40,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:15:43,967 INFO L134 CoverageAnalysis]: Checked inductivity of 6375 backedges. 5100 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:43,967 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:15:43,967 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:15:43,975 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:15:44,195 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2018-10-04 09:15:44,195 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:15:44,201 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:15:44,274 INFO L134 CoverageAnalysis]: Checked inductivity of 6375 backedges. 5100 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:44,296 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:15:44,296 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-10-04 09:15:44,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-10-04 09:15:44,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-10-04 09:15:44,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2755, Invalid=7957, Unknown=0, NotChecked=0, Total=10712 [2018-10-04 09:15:44,297 INFO L87 Difference]: Start difference. First operand 260 states and 262 transitions. Second operand 104 states. [2018-10-04 09:15:48,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:15:48,266 INFO L93 Difference]: Finished difference Result 472 states and 476 transitions. [2018-10-04 09:15:48,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-10-04 09:15:48,267 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 257 [2018-10-04 09:15:48,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:15:48,268 INFO L225 Difference]: With dead ends: 472 [2018-10-04 09:15:48,268 INFO L226 Difference]: Without dead ends: 261 [2018-10-04 09:15:48,269 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3775 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=5509, Invalid=18361, Unknown=0, NotChecked=0, Total=23870 [2018-10-04 09:15:48,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2018-10-04 09:15:48,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2018-10-04 09:15:48,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2018-10-04 09:15:48,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 263 transitions. [2018-10-04 09:15:48,309 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 263 transitions. Word has length 257 [2018-10-04 09:15:48,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:15:48,310 INFO L480 AbstractCegarLoop]: Abstraction has 261 states and 263 transitions. [2018-10-04 09:15:48,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-10-04 09:15:48,310 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 263 transitions. [2018-10-04 09:15:48,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-10-04 09:15:48,310 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:15:48,311 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 51, 50, 50, 1, 1, 1, 1, 1] [2018-10-04 09:15:48,311 INFO L423 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:15:48,311 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:15:48,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1064997210, now seen corresponding path program 100 times [2018-10-04 09:15:48,311 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:15:48,311 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:15:48,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:48,312 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:15:48,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:48,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:15:49,453 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 1426 proven. 5000 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:49,453 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:15:49,453 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:15:49,460 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:15:49,587 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:15:49,587 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:15:49,595 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:15:49,652 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 1426 proven. 5000 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:49,673 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:15:49,673 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-04 09:15:49,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-04 09:15:49,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-04 09:15:49,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-04 09:15:49,674 INFO L87 Difference]: Start difference. First operand 261 states and 263 transitions. Second operand 54 states. [2018-10-04 09:15:49,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:15:49,994 INFO L93 Difference]: Finished difference Result 275 states and 278 transitions. [2018-10-04 09:15:49,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-04 09:15:49,995 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 258 [2018-10-04 09:15:49,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:15:49,995 INFO L225 Difference]: With dead ends: 275 [2018-10-04 09:15:49,995 INFO L226 Difference]: Without dead ends: 269 [2018-10-04 09:15:49,996 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-04 09:15:49,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2018-10-04 09:15:50,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 265. [2018-10-04 09:15:50,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2018-10-04 09:15:50,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 267 transitions. [2018-10-04 09:15:50,025 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 267 transitions. Word has length 258 [2018-10-04 09:15:50,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:15:50,025 INFO L480 AbstractCegarLoop]: Abstraction has 265 states and 267 transitions. [2018-10-04 09:15:50,025 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-04 09:15:50,025 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 267 transitions. [2018-10-04 09:15:50,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2018-10-04 09:15:50,026 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:15:50,026 INFO L375 BasicCegarLoop]: trace histogram [52, 52, 51, 51, 51, 1, 1, 1, 1, 1] [2018-10-04 09:15:50,026 INFO L423 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:15:50,026 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:15:50,026 INFO L82 PathProgramCache]: Analyzing trace with hash 629884880, now seen corresponding path program 101 times [2018-10-04 09:15:50,026 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:15:50,026 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:15:50,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:50,027 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:15:50,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:50,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:15:53,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6630 backedges. 5304 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:53,338 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:15:53,338 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:15:53,345 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:15:53,652 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2018-10-04 09:15:53,652 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:15:53,658 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:15:53,717 INFO L134 CoverageAnalysis]: Checked inductivity of 6630 backedges. 5304 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:53,737 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:15:53,738 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-10-04 09:15:53,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-10-04 09:15:53,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-10-04 09:15:53,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2861, Invalid=8269, Unknown=0, NotChecked=0, Total=11130 [2018-10-04 09:15:53,739 INFO L87 Difference]: Start difference. First operand 265 states and 267 transitions. Second operand 106 states. [2018-10-04 09:15:57,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:15:57,811 INFO L93 Difference]: Finished difference Result 481 states and 485 transitions. [2018-10-04 09:15:57,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-10-04 09:15:57,812 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 262 [2018-10-04 09:15:57,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:15:57,812 INFO L225 Difference]: With dead ends: 481 [2018-10-04 09:15:57,812 INFO L226 Difference]: Without dead ends: 266 [2018-10-04 09:15:57,814 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3927 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=5721, Invalid=19085, Unknown=0, NotChecked=0, Total=24806 [2018-10-04 09:15:57,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2018-10-04 09:15:57,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 266. [2018-10-04 09:15:57,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2018-10-04 09:15:57,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 268 transitions. [2018-10-04 09:15:57,846 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 268 transitions. Word has length 262 [2018-10-04 09:15:57,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:15:57,846 INFO L480 AbstractCegarLoop]: Abstraction has 266 states and 268 transitions. [2018-10-04 09:15:57,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-10-04 09:15:57,846 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 268 transitions. [2018-10-04 09:15:57,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2018-10-04 09:15:57,847 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:15:57,847 INFO L375 BasicCegarLoop]: trace histogram [52, 52, 52, 51, 51, 1, 1, 1, 1, 1] [2018-10-04 09:15:57,848 INFO L423 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:15:57,848 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:15:57,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1501211511, now seen corresponding path program 102 times [2018-10-04 09:15:57,848 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:15:57,848 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:15:57,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:57,849 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:15:57,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:57,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:15:59,054 INFO L134 CoverageAnalysis]: Checked inductivity of 6682 backedges. 1480 proven. 5202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:59,054 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:15:59,054 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:15:59,061 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:15:59,256 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2018-10-04 09:15:59,257 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:15:59,263 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:15:59,344 INFO L134 CoverageAnalysis]: Checked inductivity of 6682 backedges. 1480 proven. 5202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:15:59,376 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:15:59,376 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-04 09:15:59,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-04 09:15:59,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-04 09:15:59,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-04 09:15:59,377 INFO L87 Difference]: Start difference. First operand 266 states and 268 transitions. Second operand 55 states. [2018-10-04 09:15:59,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:15:59,740 INFO L93 Difference]: Finished difference Result 280 states and 283 transitions. [2018-10-04 09:15:59,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-04 09:15:59,741 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 263 [2018-10-04 09:15:59,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:15:59,742 INFO L225 Difference]: With dead ends: 280 [2018-10-04 09:15:59,742 INFO L226 Difference]: Without dead ends: 274 [2018-10-04 09:15:59,742 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-04 09:15:59,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2018-10-04 09:15:59,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 270. [2018-10-04 09:15:59,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2018-10-04 09:15:59,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 272 transitions. [2018-10-04 09:15:59,773 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 272 transitions. Word has length 263 [2018-10-04 09:15:59,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:15:59,773 INFO L480 AbstractCegarLoop]: Abstraction has 270 states and 272 transitions. [2018-10-04 09:15:59,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-04 09:15:59,773 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 272 transitions. [2018-10-04 09:15:59,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2018-10-04 09:15:59,774 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:15:59,774 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 52, 52, 52, 1, 1, 1, 1, 1] [2018-10-04 09:15:59,774 INFO L423 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:15:59,774 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:15:59,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1240278145, now seen corresponding path program 103 times [2018-10-04 09:15:59,774 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:15:59,775 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:15:59,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:59,775 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:15:59,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:15:59,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:03,243 INFO L134 CoverageAnalysis]: Checked inductivity of 6890 backedges. 5512 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:03,244 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:03,244 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:03,251 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:16:03,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:03,380 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:03,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6890 backedges. 5512 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:03,490 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:03,490 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-10-04 09:16:03,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-10-04 09:16:03,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-10-04 09:16:03,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2969, Invalid=8587, Unknown=0, NotChecked=0, Total=11556 [2018-10-04 09:16:03,491 INFO L87 Difference]: Start difference. First operand 270 states and 272 transitions. Second operand 108 states. [2018-10-04 09:16:07,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:07,859 INFO L93 Difference]: Finished difference Result 490 states and 494 transitions. [2018-10-04 09:16:07,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-10-04 09:16:07,860 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 267 [2018-10-04 09:16:07,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:07,860 INFO L225 Difference]: With dead ends: 490 [2018-10-04 09:16:07,860 INFO L226 Difference]: Without dead ends: 271 [2018-10-04 09:16:07,861 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4082 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=5937, Invalid=19823, Unknown=0, NotChecked=0, Total=25760 [2018-10-04 09:16:07,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2018-10-04 09:16:07,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 271. [2018-10-04 09:16:07,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2018-10-04 09:16:07,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 273 transitions. [2018-10-04 09:16:07,890 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 273 transitions. Word has length 267 [2018-10-04 09:16:07,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:07,890 INFO L480 AbstractCegarLoop]: Abstraction has 271 states and 273 transitions. [2018-10-04 09:16:07,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-10-04 09:16:07,890 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 273 transitions. [2018-10-04 09:16:07,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2018-10-04 09:16:07,891 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:07,891 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 53, 52, 52, 1, 1, 1, 1, 1] [2018-10-04 09:16:07,891 INFO L423 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:07,891 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:07,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1999690342, now seen corresponding path program 104 times [2018-10-04 09:16:07,891 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:07,891 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:07,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:07,892 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:16:07,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:07,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:16:09,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6943 backedges. 1535 proven. 5408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:09,148 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:16:09,148 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:16:09,155 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:16:09,279 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:16:09,279 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:16:09,286 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:16:09,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6943 backedges. 1535 proven. 5408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:16:09,376 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:16:09,376 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-04 09:16:09,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-04 09:16:09,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-04 09:16:09,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-04 09:16:09,377 INFO L87 Difference]: Start difference. First operand 271 states and 273 transitions. Second operand 56 states. [2018-10-04 09:16:09,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:16:09,733 INFO L93 Difference]: Finished difference Result 285 states and 288 transitions. [2018-10-04 09:16:09,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-04 09:16:09,733 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 268 [2018-10-04 09:16:09,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:16:09,734 INFO L225 Difference]: With dead ends: 285 [2018-10-04 09:16:09,734 INFO L226 Difference]: Without dead ends: 279 [2018-10-04 09:16:09,734 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-04 09:16:09,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2018-10-04 09:16:09,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 275. [2018-10-04 09:16:09,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2018-10-04 09:16:09,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 277 transitions. [2018-10-04 09:16:09,764 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 277 transitions. Word has length 268 [2018-10-04 09:16:09,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:16:09,764 INFO L480 AbstractCegarLoop]: Abstraction has 275 states and 277 transitions. [2018-10-04 09:16:09,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-04 09:16:09,764 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 277 transitions. [2018-10-04 09:16:09,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2018-10-04 09:16:09,765 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:16:09,765 INFO L375 BasicCegarLoop]: trace histogram [54, 54, 53, 53, 53, 1, 1, 1, 1, 1] [2018-10-04 09:16:09,765 INFO L423 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:16:09,765 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:16:09,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1751242020, now seen corresponding path program 105 times [2018-10-04 09:16:09,766 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:16:09,766 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:16:09,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:09,766 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:16:09,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:16:09,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-10-04 09:16:12,885 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-04 09:16:12,889 WARN L205 ceAbstractionStarter]: Timeout [2018-10-04 09:16:12,889 INFO L202 PluginConnector]: Adding new model down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.10 09:16:12 BoogieIcfgContainer [2018-10-04 09:16:12,890 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-04 09:16:12,890 INFO L168 Benchmark]: Toolchain (without parser) took 236796.12 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -7.9 MB). Free memory was 1.4 GB in the beginning and 1.0 GB in the end (delta: 429.7 MB). Peak memory consumption was 421.8 MB. Max. memory is 7.1 GB. [2018-10-04 09:16:12,892 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 09:16:12,892 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.28 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 09:16:12,892 INFO L168 Benchmark]: Boogie Preprocessor took 25.95 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 09:16:12,893 INFO L168 Benchmark]: RCFGBuilder took 414.57 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-04 09:16:12,893 INFO L168 Benchmark]: TraceAbstraction took 236307.74 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -7.9 MB). Free memory was 1.4 GB in the beginning and 1.0 GB in the end (delta: 408.6 MB). Peak memory consumption was 400.7 MB. Max. memory is 7.1 GB. [2018-10-04 09:16:12,895 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 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 43.28 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.95 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 414.57 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 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 236307.74 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -7.9 MB). Free memory was 1.4 GB in the beginning and 1.0 GB in the end (delta: 408.6 MB). Peak memory consumption was 400.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 76]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 76). Cancelled while BasicCegarLoop was analyzing trace of length 273 with TraceHistMax 54, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 101 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 10 locations, 1 error locations. TIMEOUT Result, 236.2s OverallTime, 109 OverallIterations, 54 TraceHistogramMax, 107.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3308 SDtfs, 7810 SDslu, 74264 SDs, 0 SdLazy, 79912 SolverSat, 1715 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 46.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 21725 GetRequests, 15944 SyntacticMatches, 0 SemanticMatches, 5781 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73034 ImplicationChecksByTransitivity, 142.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=275occurred in iteration=108, 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: 1.6s AutomataMinimizationTime, 108 MinimizatonAttempts, 218 StatesRemovedByMinimization, 55 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.6s SsaConstructionTime, 8.8s SatisfiabilityAnalysisTime, 107.0s InterpolantComputationTime, 29150 NumberOfCodeBlocks, 29150 NumberOfCodeBlocksAsserted, 1607 NumberOfCheckSat, 28938 ConstructedInterpolants, 0 QuantifiedInterpolants, 15368394 SizeOfPredicates, 208 NumberOfNonLiveVariables, 46436 ConjunctsInSsa, 5876 ConjunctsInUnsatCore, 212 InterpolantComputations, 4 PerfectInterpolantSequences, 256414/498942 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/down.i_4.bplTransformedIcfg_BEv2_5.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-04_09-16-12-903.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/down.i_4.bplTransformedIcfg_BEv2_5.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-04_09-16-12-903.csv Completed graceful shutdown