java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-9f4048f [2018-10-04 12:17:42,924 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-04 12:17:42,926 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-04 12:17:42,940 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-04 12:17:42,940 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-04 12:17:42,941 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-04 12:17:42,942 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-04 12:17:42,944 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-04 12:17:42,946 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-04 12:17:42,947 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-04 12:17:42,947 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-04 12:17:42,948 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-04 12:17:42,949 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-04 12:17:42,949 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-04 12:17:42,951 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-04 12:17:42,951 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-04 12:17:42,952 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-04 12:17:42,954 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-04 12:17:42,956 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-04 12:17:42,958 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-04 12:17:42,959 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-04 12:17:42,960 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-04 12:17:42,963 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-04 12:17:42,963 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-04 12:17:42,963 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-04 12:17:42,964 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-04 12:17:42,965 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-04 12:17:42,966 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-04 12:17:42,967 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-04 12:17:42,968 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-04 12:17:42,968 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-04 12:17:42,969 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-04 12:17:42,969 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-04 12:17:42,969 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-04 12:17:42,970 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-04 12:17:42,971 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-04 12:17:42,971 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 12:17:42,989 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-04 12:17:42,990 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-04 12:17:42,990 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-04 12:17:42,991 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-04 12:17:42,991 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-04 12:17:42,991 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-04 12:17:42,992 INFO L133 SettingsManager]: * Use SBE=true [2018-10-04 12:17:42,992 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-04 12:17:42,992 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-04 12:17:42,992 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-04 12:17:42,992 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-04 12:17:42,993 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-04 12:17:42,993 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-04 12:17:42,993 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-04 12:17:42,993 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-04 12:17:42,993 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-04 12:17:42,994 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-04 12:17:42,994 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-04 12:17:42,994 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-04 12:17:42,994 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-04 12:17:42,994 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-04 12:17:42,995 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-04 12:17:42,995 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 12:17:42,995 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-04 12:17:42,995 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-04 12:17:42,995 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-04 12:17:42,996 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-04 12:17:42,996 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-04 12:17:42,996 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-04 12:17:42,996 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-04 12:17:43,038 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-04 12:17:43,051 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-04 12:17:43,055 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-04 12:17:43,056 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-04 12:17:43,057 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-04 12:17:43,058 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl [2018-10-04 12:17:43,058 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl' [2018-10-04 12:17:43,108 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-04 12:17:43,110 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-04 12:17:43,110 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-04 12:17:43,111 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-04 12:17:43,111 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-04 12:17:43,131 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:17:43" (1/1) ... [2018-10-04 12:17:43,143 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:17:43" (1/1) ... [2018-10-04 12:17:43,150 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-04 12:17:43,151 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-04 12:17:43,151 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-04 12:17:43,152 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-04 12:17:43,163 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:17:43" (1/1) ... [2018-10-04 12:17:43,164 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:17:43" (1/1) ... [2018-10-04 12:17:43,164 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:17:43" (1/1) ... [2018-10-04 12:17:43,165 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:17:43" (1/1) ... [2018-10-04 12:17:43,167 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:17:43" (1/1) ... [2018-10-04 12:17:43,169 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:17:43" (1/1) ... [2018-10-04 12:17:43,170 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:17:43" (1/1) ... [2018-10-04 12:17:43,171 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-04 12:17:43,172 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-04 12:17:43,172 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-04 12:17:43,173 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-04 12:17:43,174 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:17:43" (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 12:17:43,250 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-10-04 12:17:43,251 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-04 12:17:43,251 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-04 12:17:43,469 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-04 12:17:43,472 INFO L202 PluginConnector]: Adding new model count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 12:17:43 BoogieIcfgContainer [2018-10-04 12:17:43,472 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-04 12:17:43,475 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-04 12:17:43,476 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-04 12:17:43,480 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-04 12:17:43,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:17:43" (1/2) ... [2018-10-04 12:17:43,481 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e1f9931 and model type count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 12:17:43, skipping insertion in model container [2018-10-04 12:17:43,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 12:17:43" (2/2) ... [2018-10-04 12:17:43,483 INFO L112 eAbstractionObserver]: Analyzing ICFG count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl [2018-10-04 12:17:43,494 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-04 12:17:43,502 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-04 12:17:43,549 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-04 12:17:43,550 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-04 12:17:43,550 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-04 12:17:43,550 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-04 12:17:43,550 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-04 12:17:43,551 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-04 12:17:43,551 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-04 12:17:43,551 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-04 12:17:43,551 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-04 12:17:43,567 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-10-04 12:17:43,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-10-04 12:17:43,576 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:17:43,577 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-10-04 12:17:43,579 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:17:43,585 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:17:43,585 INFO L82 PathProgramCache]: Analyzing trace with hash 30017, now seen corresponding path program 1 times [2018-10-04 12:17:43,588 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:17:43,589 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:17:43,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:17:43,647 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:17:43,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:17:43,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:17:43,825 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 12:17:43,828 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 12:17:43,828 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-04 12:17:43,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-04 12:17:43,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-04 12:17:43,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-04 12:17:43,854 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-10-04 12:17:43,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:17:43,923 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2018-10-04 12:17:43,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-04 12:17:43,925 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-10-04 12:17:43,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:17:43,939 INFO L225 Difference]: With dead ends: 9 [2018-10-04 12:17:43,939 INFO L226 Difference]: Without dead ends: 5 [2018-10-04 12:17:43,943 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 12:17:43,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-10-04 12:17:43,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-10-04 12:17:43,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-10-04 12:17:43,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-10-04 12:17:43,996 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-10-04 12:17:43,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:17:43,997 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-10-04 12:17:43,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-04 12:17:43,997 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-10-04 12:17:43,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-04 12:17:43,998 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:17:43,998 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-10-04 12:17:43,998 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:17:43,999 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:17:43,999 INFO L82 PathProgramCache]: Analyzing trace with hash 928552, now seen corresponding path program 1 times [2018-10-04 12:17:44,000 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:17:44,000 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:17:44,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:17:44,002 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:17:44,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:17:44,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:17:44,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:17:44,123 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:17:44,123 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 12:17:44,133 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:17:44,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:17:44,164 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:17:44,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:17:44,270 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:17:44,271 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2018-10-04 12:17:44,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-04 12:17:44,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-04 12:17:44,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-04 12:17:44,272 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 5 states. [2018-10-04 12:17:44,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:17:44,330 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2018-10-04 12:17:44,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 12:17:44,331 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2018-10-04 12:17:44,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:17:44,333 INFO L225 Difference]: With dead ends: 9 [2018-10-04 12:17:44,333 INFO L226 Difference]: Without dead ends: 7 [2018-10-04 12:17:44,334 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-04 12:17:44,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-04 12:17:44,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-04 12:17:44,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-04 12:17:44,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-10-04 12:17:44,339 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-10-04 12:17:44,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:17:44,340 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-10-04 12:17:44,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-04 12:17:44,340 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-10-04 12:17:44,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-04 12:17:44,341 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:17:44,341 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2018-10-04 12:17:44,341 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:17:44,341 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:17:44,342 INFO L82 PathProgramCache]: Analyzing trace with hash 892275272, now seen corresponding path program 2 times [2018-10-04 12:17:44,342 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:17:44,342 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:17:44,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:17:44,344 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:17:44,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:17:44,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:17:44,498 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:17:44,499 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:17:44,499 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:17:44,507 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:17:44,526 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:17:44,527 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:17:44,528 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:17:44,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:17:44,654 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:17:44,655 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-10-04 12:17:44,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-04 12:17:44,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-04 12:17:44,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-10-04 12:17:44,656 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 7 states. [2018-10-04 12:17:45,013 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 11 [2018-10-04 12:17:45,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:17:45,038 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-10-04 12:17:45,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 12:17:45,039 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 6 [2018-10-04 12:17:45,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:17:45,040 INFO L225 Difference]: With dead ends: 11 [2018-10-04 12:17:45,040 INFO L226 Difference]: Without dead ends: 9 [2018-10-04 12:17:45,041 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-10-04 12:17:45,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-04 12:17:45,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-04 12:17:45,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-04 12:17:45,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-10-04 12:17:45,046 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-10-04 12:17:45,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:17:45,046 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-10-04 12:17:45,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-04 12:17:45,046 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-10-04 12:17:45,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-04 12:17:45,047 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:17:45,047 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1] [2018-10-04 12:17:45,047 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:17:45,048 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:17:45,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1516986008, now seen corresponding path program 3 times [2018-10-04 12:17:45,048 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:17:45,048 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:17:45,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:17:45,049 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:17:45,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:17:45,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:17:45,217 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:17:45,217 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:17:45,218 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 12:17:45,227 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:17:45,245 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-04 12:17:45,246 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:17:45,247 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:17:45,362 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:17:45,392 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:17:45,393 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-10-04 12:17:45,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 12:17:45,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 12:17:45,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2018-10-04 12:17:45,394 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 9 states. [2018-10-04 12:17:45,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:17:45,662 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2018-10-04 12:17:45,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 12:17:45,664 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 8 [2018-10-04 12:17:45,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:17:45,665 INFO L225 Difference]: With dead ends: 13 [2018-10-04 12:17:45,666 INFO L226 Difference]: Without dead ends: 11 [2018-10-04 12:17:45,667 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2018-10-04 12:17:45,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-04 12:17:45,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-04 12:17:45,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-04 12:17:45,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-04 12:17:45,671 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-10-04 12:17:45,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:17:45,672 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-04 12:17:45,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 12:17:45,672 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-04 12:17:45,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-04 12:17:45,673 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:17:45,673 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1, 1] [2018-10-04 12:17:45,673 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:17:45,673 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:17:45,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1829703544, now seen corresponding path program 4 times [2018-10-04 12:17:45,674 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:17:45,674 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:17:45,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:17:45,676 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:17:45,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:17:45,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:17:46,316 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:17:46,317 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:17:46,317 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 12:17:46,324 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:17:46,363 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:17:46,363 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:17:46,365 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:17:46,427 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:17:46,448 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:17:46,448 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-10-04 12:17:46,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 12:17:46,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 12:17:46,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2018-10-04 12:17:46,450 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 11 states. [2018-10-04 12:17:46,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:17:46,700 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2018-10-04 12:17:46,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 12:17:46,700 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2018-10-04 12:17:46,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:17:46,701 INFO L225 Difference]: With dead ends: 15 [2018-10-04 12:17:46,701 INFO L226 Difference]: Without dead ends: 13 [2018-10-04 12:17:46,702 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2018-10-04 12:17:46,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-04 12:17:46,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-04 12:17:46,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-04 12:17:46,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-10-04 12:17:46,706 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-10-04 12:17:46,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:17:46,707 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-10-04 12:17:46,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 12:17:46,707 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-10-04 12:17:46,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-04 12:17:46,708 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:17:46,708 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1, 1] [2018-10-04 12:17:46,708 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:17:46,708 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:17:46,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1703544920, now seen corresponding path program 5 times [2018-10-04 12:17:46,709 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:17:46,709 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:17:46,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:17:46,710 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:17:46,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:17:46,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:17:47,140 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:17:47,140 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:17:47,140 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:17:47,157 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:17:47,176 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-04 12:17:47,176 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:17:47,178 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:17:47,269 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:17:47,289 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:17:47,289 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-10-04 12:17:47,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-04 12:17:47,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-04 12:17:47,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2018-10-04 12:17:47,290 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 13 states. [2018-10-04 12:17:47,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:17:47,684 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2018-10-04 12:17:47,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-04 12:17:47,685 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2018-10-04 12:17:47,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:17:47,687 INFO L225 Difference]: With dead ends: 17 [2018-10-04 12:17:47,687 INFO L226 Difference]: Without dead ends: 15 [2018-10-04 12:17:47,688 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2018-10-04 12:17:47,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-04 12:17:47,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-04 12:17:47,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-04 12:17:47,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-04 12:17:47,693 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-10-04 12:17:47,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:17:47,694 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-04 12:17:47,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-04 12:17:47,694 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-04 12:17:47,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-04 12:17:47,695 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:17:47,696 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1, 1] [2018-10-04 12:17:47,696 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:17:47,696 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:17:47,697 INFO L82 PathProgramCache]: Analyzing trace with hash -724191544, now seen corresponding path program 6 times [2018-10-04 12:17:47,697 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:17:47,697 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:17:47,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:17:47,698 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:17:47,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:17:47,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:17:47,990 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:17:47,991 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:17:47,991 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 12:17:48,001 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:17:48,016 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-04 12:17:48,016 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:17:48,018 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:17:48,072 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:17:48,095 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:17:48,095 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-10-04 12:17:48,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-04 12:17:48,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-04 12:17:48,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2018-10-04 12:17:48,096 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 15 states. [2018-10-04 12:17:48,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:17:48,686 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2018-10-04 12:17:48,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-04 12:17:48,688 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 14 [2018-10-04 12:17:48,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:17:48,688 INFO L225 Difference]: With dead ends: 19 [2018-10-04 12:17:48,688 INFO L226 Difference]: Without dead ends: 17 [2018-10-04 12:17:48,689 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2018-10-04 12:17:48,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-04 12:17:48,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-04 12:17:48,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-04 12:17:48,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-04 12:17:48,693 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-10-04 12:17:48,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:17:48,694 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-04 12:17:48,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-04 12:17:48,694 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-04 12:17:48,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-04 12:17:48,694 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:17:48,695 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1, 1] [2018-10-04 12:17:48,695 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:17:48,695 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:17:48,695 INFO L82 PathProgramCache]: Analyzing trace with hash -163435032, now seen corresponding path program 7 times [2018-10-04 12:17:48,695 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:17:48,695 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:17:48,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:17:48,696 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:17:48,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:17:48,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:17:48,935 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:17:48,935 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:17:48,935 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 12:17:48,944 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:17:48,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:17:48,968 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:17:49,036 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:17:49,066 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:17:49,066 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2018-10-04 12:17:49,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-04 12:17:49,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-04 12:17:49,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2018-10-04 12:17:49,068 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 17 states. [2018-10-04 12:17:49,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:17:49,771 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2018-10-04 12:17:49,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-04 12:17:49,771 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 16 [2018-10-04 12:17:49,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:17:49,773 INFO L225 Difference]: With dead ends: 21 [2018-10-04 12:17:49,773 INFO L226 Difference]: Without dead ends: 19 [2018-10-04 12:17:49,775 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2018-10-04 12:17:49,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-04 12:17:49,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-04 12:17:49,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-04 12:17:49,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-04 12:17:49,780 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-10-04 12:17:49,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:17:49,780 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-04 12:17:49,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-04 12:17:49,780 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-04 12:17:49,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-04 12:17:49,781 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:17:49,781 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1, 1] [2018-10-04 12:17:49,781 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:17:49,782 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:17:49,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1852661000, now seen corresponding path program 8 times [2018-10-04 12:17:49,782 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:17:49,782 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:17:49,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:17:49,783 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:17:49,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:17:49,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:17:50,359 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:17:50,359 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:17:50,360 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:17:50,374 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:17:50,413 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:17:50,413 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:17:50,420 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:17:50,521 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:17:50,542 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:17:50,542 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2018-10-04 12:17:50,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-04 12:17:50,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-04 12:17:50,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2018-10-04 12:17:50,543 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 19 states. [2018-10-04 12:17:51,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:17:51,224 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2018-10-04 12:17:51,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-04 12:17:51,224 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 18 [2018-10-04 12:17:51,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:17:51,225 INFO L225 Difference]: With dead ends: 23 [2018-10-04 12:17:51,225 INFO L226 Difference]: Without dead ends: 21 [2018-10-04 12:17:51,226 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2018-10-04 12:17:51,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-04 12:17:51,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-04 12:17:51,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-04 12:17:51,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-04 12:17:51,231 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2018-10-04 12:17:51,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:17:51,231 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-04 12:17:51,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-04 12:17:51,232 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-04 12:17:51,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-04 12:17:51,235 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:17:51,235 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1, 1] [2018-10-04 12:17:51,235 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:17:51,236 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:17:51,236 INFO L82 PathProgramCache]: Analyzing trace with hash -2004270040, now seen corresponding path program 9 times [2018-10-04 12:17:51,236 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:17:51,236 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:17:51,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:17:51,237 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:17:51,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:17:51,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:17:51,595 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:17:51,595 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:17:51,595 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:17:51,605 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:17:51,620 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-04 12:17:51,621 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:17:51,622 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:17:51,667 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:17:51,695 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:17:51,695 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2018-10-04 12:17:51,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-04 12:17:51,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-04 12:17:51,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=380, Unknown=0, NotChecked=0, Total=420 [2018-10-04 12:17:51,697 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 21 states. [2018-10-04 12:17:52,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:17:52,760 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-10-04 12:17:52,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-04 12:17:52,760 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 20 [2018-10-04 12:17:52,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:17:52,763 INFO L225 Difference]: With dead ends: 25 [2018-10-04 12:17:52,763 INFO L226 Difference]: Without dead ends: 23 [2018-10-04 12:17:52,764 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=379, Invalid=1027, Unknown=0, NotChecked=0, Total=1406 [2018-10-04 12:17:52,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-04 12:17:52,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-04 12:17:52,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-04 12:17:52,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-04 12:17:52,770 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2018-10-04 12:17:52,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:17:52,770 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-04 12:17:52,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-04 12:17:52,770 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-04 12:17:52,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-04 12:17:52,771 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:17:52,771 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1, 1] [2018-10-04 12:17:52,771 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:17:52,772 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:17:52,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1958223032, now seen corresponding path program 10 times [2018-10-04 12:17:52,772 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:17:52,772 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:17:52,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:17:52,773 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:17:52,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:17:52,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:17:53,075 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:17:53,075 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:17:53,075 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 12:17:53,084 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:17:53,110 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:17:53,110 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:17:53,119 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:17:53,190 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:17:53,210 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:17:53,210 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2018-10-04 12:17:53,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-04 12:17:53,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-04 12:17:53,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=462, Unknown=0, NotChecked=0, Total=506 [2018-10-04 12:17:53,212 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 23 states. [2018-10-04 12:17:53,448 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 9 [2018-10-04 12:17:53,787 WARN L178 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 11 [2018-10-04 12:17:54,205 WARN L178 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 11 [2018-10-04 12:17:54,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:17:54,652 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2018-10-04 12:17:54,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-04 12:17:54,653 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 22 [2018-10-04 12:17:54,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:17:54,654 INFO L225 Difference]: With dead ends: 27 [2018-10-04 12:17:54,654 INFO L226 Difference]: Without dead ends: 25 [2018-10-04 12:17:54,655 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=461, Invalid=1261, Unknown=0, NotChecked=0, Total=1722 [2018-10-04 12:17:54,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-04 12:17:54,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-04 12:17:54,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-04 12:17:54,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-10-04 12:17:54,660 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2018-10-04 12:17:54,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:17:54,660 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-10-04 12:17:54,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-04 12:17:54,661 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-10-04 12:17:54,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-04 12:17:54,661 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:17:54,661 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1, 1] [2018-10-04 12:17:54,661 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:17:54,662 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:17:54,662 INFO L82 PathProgramCache]: Analyzing trace with hash -656721304, now seen corresponding path program 11 times [2018-10-04 12:17:54,662 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:17:54,662 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:17:54,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:17:54,663 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:17:54,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:17:54,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:17:55,064 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:17:55,064 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:17:55,064 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:17:55,072 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:17:55,101 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-04 12:17:55,101 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:17:55,106 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:17:55,235 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:17:55,259 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:17:55,260 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2018-10-04 12:17:55,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-04 12:17:55,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-04 12:17:55,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=552, Unknown=0, NotChecked=0, Total=600 [2018-10-04 12:17:55,262 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 25 states. [2018-10-04 12:17:56,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:17:56,370 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2018-10-04 12:17:56,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-04 12:17:56,371 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 24 [2018-10-04 12:17:56,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:17:56,372 INFO L225 Difference]: With dead ends: 29 [2018-10-04 12:17:56,372 INFO L226 Difference]: Without dead ends: 27 [2018-10-04 12:17:56,374 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=551, Invalid=1519, Unknown=0, NotChecked=0, Total=2070 [2018-10-04 12:17:56,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-04 12:17:56,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-04 12:17:56,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-04 12:17:56,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-04 12:17:56,379 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2018-10-04 12:17:56,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:17:56,379 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-04 12:17:56,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-04 12:17:56,379 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-04 12:17:56,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-04 12:17:56,380 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:17:56,380 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1, 1] [2018-10-04 12:17:56,381 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:17:56,381 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:17:56,381 INFO L82 PathProgramCache]: Analyzing trace with hash 250956168, now seen corresponding path program 12 times [2018-10-04 12:17:56,381 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:17:56,381 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:17:56,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:17:56,382 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:17:56,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:17:56,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:17:56,792 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:17:56,792 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:17:56,792 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:17:56,803 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:17:56,960 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-04 12:17:56,960 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:17:56,962 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:17:57,093 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:17:57,121 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:17:57,122 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2018-10-04 12:17:57,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-04 12:17:57,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-04 12:17:57,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=650, Unknown=0, NotChecked=0, Total=702 [2018-10-04 12:17:57,123 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 27 states. [2018-10-04 12:17:58,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:17:58,386 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-10-04 12:17:58,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-04 12:17:58,387 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 26 [2018-10-04 12:17:58,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:17:58,388 INFO L225 Difference]: With dead ends: 31 [2018-10-04 12:17:58,388 INFO L226 Difference]: Without dead ends: 29 [2018-10-04 12:17:58,389 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=649, Invalid=1801, Unknown=0, NotChecked=0, Total=2450 [2018-10-04 12:17:58,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-04 12:17:58,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-04 12:17:58,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-04 12:17:58,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-04 12:17:58,394 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2018-10-04 12:17:58,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:17:58,395 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-04 12:17:58,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-04 12:17:58,395 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-04 12:17:58,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-04 12:17:58,396 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:17:58,396 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1, 1] [2018-10-04 12:17:58,396 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:17:58,396 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:17:58,396 INFO L82 PathProgramCache]: Analyzing trace with hash 650645672, now seen corresponding path program 13 times [2018-10-04 12:17:58,397 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:17:58,397 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:17:58,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:17:58,398 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:17:58,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:17:58,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:17:58,849 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:17:58,849 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:17:58,849 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 12:17:58,857 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:17:58,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:17:58,910 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:17:59,023 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:17:59,043 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:17:59,043 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2018-10-04 12:17:59,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-04 12:17:59,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-04 12:17:59,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=756, Unknown=0, NotChecked=0, Total=812 [2018-10-04 12:17:59,044 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 29 states. [2018-10-04 12:17:59,354 WARN L178 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 11 [2018-10-04 12:18:00,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:18:00,837 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2018-10-04 12:18:00,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-04 12:18:00,837 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 28 [2018-10-04 12:18:00,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:18:00,838 INFO L225 Difference]: With dead ends: 33 [2018-10-04 12:18:00,838 INFO L226 Difference]: Without dead ends: 31 [2018-10-04 12:18:00,839 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=755, Invalid=2107, Unknown=0, NotChecked=0, Total=2862 [2018-10-04 12:18:00,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-04 12:18:00,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-04 12:18:00,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-04 12:18:00,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-10-04 12:18:00,845 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2018-10-04 12:18:00,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:18:00,845 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-10-04 12:18:00,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-04 12:18:00,845 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-10-04 12:18:00,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-04 12:18:00,846 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:18:00,846 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1, 1] [2018-10-04 12:18:00,846 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:18:00,846 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:18:00,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1794797624, now seen corresponding path program 14 times [2018-10-04 12:18:00,847 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:18:00,847 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:18:00,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:00,848 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:18:00,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:00,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:18:01,380 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:01,380 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:18:01,380 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 12:18:01,392 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:18:01,448 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:18:01,449 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:18:01,469 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:18:01,623 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:01,644 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:18:01,644 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2018-10-04 12:18:01,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-04 12:18:01,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-04 12:18:01,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=870, Unknown=0, NotChecked=0, Total=930 [2018-10-04 12:18:01,645 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 31 states. [2018-10-04 12:18:02,696 WARN L178 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 11 [2018-10-04 12:18:03,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:18:03,526 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2018-10-04 12:18:03,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-04 12:18:03,527 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 30 [2018-10-04 12:18:03,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:18:03,528 INFO L225 Difference]: With dead ends: 35 [2018-10-04 12:18:03,528 INFO L226 Difference]: Without dead ends: 33 [2018-10-04 12:18:03,530 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=869, Invalid=2437, Unknown=0, NotChecked=0, Total=3306 [2018-10-04 12:18:03,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-04 12:18:03,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-04 12:18:03,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-04 12:18:03,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-10-04 12:18:03,535 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2018-10-04 12:18:03,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:18:03,536 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-10-04 12:18:03,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-04 12:18:03,536 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-10-04 12:18:03,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-04 12:18:03,537 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:18:03,537 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1, 1] [2018-10-04 12:18:03,537 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:18:03,537 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:18:03,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1776273128, now seen corresponding path program 15 times [2018-10-04 12:18:03,538 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:18:03,538 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:18:03,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:03,539 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:18:03,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:03,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:18:04,488 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:04,489 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:18:04,489 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 12:18:04,497 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:18:04,522 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-04 12:18:04,522 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:18:04,525 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:18:04,603 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:04,623 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:18:04,624 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2018-10-04 12:18:04,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-04 12:18:04,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-04 12:18:04,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=992, Unknown=0, NotChecked=0, Total=1056 [2018-10-04 12:18:04,625 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 33 states. [2018-10-04 12:18:06,876 WARN L178 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 11 [2018-10-04 12:18:07,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:18:07,422 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-10-04 12:18:07,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-04 12:18:07,423 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 32 [2018-10-04 12:18:07,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:18:07,425 INFO L225 Difference]: With dead ends: 37 [2018-10-04 12:18:07,425 INFO L226 Difference]: Without dead ends: 35 [2018-10-04 12:18:07,427 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=991, Invalid=2791, Unknown=0, NotChecked=0, Total=3782 [2018-10-04 12:18:07,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-04 12:18:07,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-04 12:18:07,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-04 12:18:07,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-04 12:18:07,432 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2018-10-04 12:18:07,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:18:07,432 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-04 12:18:07,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-04 12:18:07,432 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-04 12:18:07,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-04 12:18:07,433 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:18:07,433 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1, 1] [2018-10-04 12:18:07,434 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:18:07,434 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:18:07,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1896396296, now seen corresponding path program 16 times [2018-10-04 12:18:07,434 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:18:07,434 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:18:07,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:07,435 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:18:07,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:07,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:18:08,072 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:08,073 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:18:08,073 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 12:18:08,080 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:18:08,142 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:18:08,142 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:18:08,172 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:18:08,253 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:08,273 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:18:08,273 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2018-10-04 12:18:08,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-04 12:18:08,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-04 12:18:08,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=1122, Unknown=0, NotChecked=0, Total=1190 [2018-10-04 12:18:08,274 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 35 states. [2018-10-04 12:18:10,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:18:10,548 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2018-10-04 12:18:10,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-04 12:18:10,548 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 34 [2018-10-04 12:18:10,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:18:10,549 INFO L225 Difference]: With dead ends: 39 [2018-10-04 12:18:10,549 INFO L226 Difference]: Without dead ends: 37 [2018-10-04 12:18:10,552 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1121, Invalid=3169, Unknown=0, NotChecked=0, Total=4290 [2018-10-04 12:18:10,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-04 12:18:10,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-04 12:18:10,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-04 12:18:10,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-10-04 12:18:10,557 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2018-10-04 12:18:10,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:18:10,557 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-10-04 12:18:10,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-04 12:18:10,557 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-10-04 12:18:10,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-04 12:18:10,558 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:18:10,558 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1, 1] [2018-10-04 12:18:10,558 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:18:10,558 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:18:10,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1370643752, now seen corresponding path program 17 times [2018-10-04 12:18:10,559 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:18:10,559 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:18:10,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:10,559 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:18:10,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:10,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:18:11,601 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:11,601 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:18:11,601 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 12:18:11,610 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:18:11,674 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-04 12:18:11,675 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:18:11,686 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:18:11,739 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:11,760 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:18:11,760 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2018-10-04 12:18:11,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-04 12:18:11,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-04 12:18:11,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=1260, Unknown=0, NotChecked=0, Total=1332 [2018-10-04 12:18:11,761 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 37 states. [2018-10-04 12:18:14,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:18:14,244 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2018-10-04 12:18:14,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-04 12:18:14,244 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 36 [2018-10-04 12:18:14,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:18:14,245 INFO L225 Difference]: With dead ends: 41 [2018-10-04 12:18:14,245 INFO L226 Difference]: Without dead ends: 39 [2018-10-04 12:18:14,248 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1259, Invalid=3571, Unknown=0, NotChecked=0, Total=4830 [2018-10-04 12:18:14,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-04 12:18:14,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-04 12:18:14,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-04 12:18:14,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-10-04 12:18:14,254 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2018-10-04 12:18:14,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:18:14,255 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-10-04 12:18:14,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-04 12:18:14,255 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-10-04 12:18:14,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-04 12:18:14,255 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:18:14,256 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1, 1] [2018-10-04 12:18:14,256 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:18:14,256 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:18:14,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1366377400, now seen corresponding path program 18 times [2018-10-04 12:18:14,256 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:18:14,256 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:18:14,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:14,257 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:18:14,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:14,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:18:15,012 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:15,013 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:18:15,013 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 12:18:15,022 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:18:15,045 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-04 12:18:15,045 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:18:15,048 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:18:15,183 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:15,203 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:18:15,204 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2018-10-04 12:18:15,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-04 12:18:15,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-04 12:18:15,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=1406, Unknown=0, NotChecked=0, Total=1482 [2018-10-04 12:18:15,205 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 39 states. [2018-10-04 12:18:18,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:18:18,087 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2018-10-04 12:18:18,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-04 12:18:18,088 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 38 [2018-10-04 12:18:18,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:18:18,089 INFO L225 Difference]: With dead ends: 43 [2018-10-04 12:18:18,089 INFO L226 Difference]: Without dead ends: 41 [2018-10-04 12:18:18,091 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1405, Invalid=3997, Unknown=0, NotChecked=0, Total=5402 [2018-10-04 12:18:18,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-04 12:18:18,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-04 12:18:18,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-04 12:18:18,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-10-04 12:18:18,096 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2018-10-04 12:18:18,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:18:18,097 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-10-04 12:18:18,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-04 12:18:18,097 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-10-04 12:18:18,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-04 12:18:18,098 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:18:18,098 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1, 1] [2018-10-04 12:18:18,098 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:18:18,098 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:18:18,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1171247976, now seen corresponding path program 19 times [2018-10-04 12:18:18,099 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:18:18,099 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:18:18,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:18,099 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:18:18,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:18,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:18:19,198 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:19,198 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:18:19,198 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 12:18:19,205 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:18:19,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:18:19,347 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:18:19,432 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:19,454 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:18:19,454 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2018-10-04 12:18:19,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-04 12:18:19,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-04 12:18:19,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1560, Unknown=0, NotChecked=0, Total=1640 [2018-10-04 12:18:19,455 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 41 states. [2018-10-04 12:18:22,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:18:22,705 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2018-10-04 12:18:22,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-04 12:18:22,705 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 40 [2018-10-04 12:18:22,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:18:22,706 INFO L225 Difference]: With dead ends: 45 [2018-10-04 12:18:22,706 INFO L226 Difference]: Without dead ends: 43 [2018-10-04 12:18:22,708 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1559, Invalid=4447, Unknown=0, NotChecked=0, Total=6006 [2018-10-04 12:18:22,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-04 12:18:22,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-04 12:18:22,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-04 12:18:22,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-10-04 12:18:22,714 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2018-10-04 12:18:22,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:18:22,714 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-10-04 12:18:22,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-04 12:18:22,714 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-10-04 12:18:22,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-04 12:18:22,715 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:18:22,715 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1, 1] [2018-10-04 12:18:22,715 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:18:22,716 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:18:22,716 INFO L82 PathProgramCache]: Analyzing trace with hash 287810184, now seen corresponding path program 20 times [2018-10-04 12:18:22,716 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:18:22,716 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:18:22,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:22,717 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:18:22,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:22,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:18:23,676 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:23,676 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:18:23,676 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 12:18:23,685 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:18:23,785 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:18:23,786 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:18:23,841 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:18:23,944 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:23,964 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:18:23,964 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2018-10-04 12:18:23,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-04 12:18:23,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-04 12:18:23,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1722, Unknown=0, NotChecked=0, Total=1806 [2018-10-04 12:18:23,965 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 43 states. [2018-10-04 12:18:27,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:18:27,491 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2018-10-04 12:18:27,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-04 12:18:27,494 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 42 [2018-10-04 12:18:27,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:18:27,495 INFO L225 Difference]: With dead ends: 47 [2018-10-04 12:18:27,495 INFO L226 Difference]: Without dead ends: 45 [2018-10-04 12:18:27,497 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1721, Invalid=4921, Unknown=0, NotChecked=0, Total=6642 [2018-10-04 12:18:27,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-04 12:18:27,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-04 12:18:27,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-04 12:18:27,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-10-04 12:18:27,508 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2018-10-04 12:18:27,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:18:27,508 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-10-04 12:18:27,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-04 12:18:27,509 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-10-04 12:18:27,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-04 12:18:27,509 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:18:27,509 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1, 1] [2018-10-04 12:18:27,510 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:18:27,510 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:18:27,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1707616680, now seen corresponding path program 21 times [2018-10-04 12:18:27,511 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:18:27,511 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:18:27,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:27,512 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:18:27,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:27,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:18:29,080 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:29,080 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:18:29,080 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:18:29,089 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:18:29,120 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-10-04 12:18:29,120 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:18:29,122 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:18:29,192 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:29,215 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:18:29,216 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2018-10-04 12:18:29,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-04 12:18:29,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-04 12:18:29,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1892, Unknown=0, NotChecked=0, Total=1980 [2018-10-04 12:18:29,217 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 45 states. [2018-10-04 12:18:33,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:18:33,232 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-10-04 12:18:33,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-04 12:18:33,234 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 44 [2018-10-04 12:18:33,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:18:33,235 INFO L225 Difference]: With dead ends: 49 [2018-10-04 12:18:33,235 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 12:18:33,236 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1891, Invalid=5419, Unknown=0, NotChecked=0, Total=7310 [2018-10-04 12:18:33,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 12:18:33,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-04 12:18:33,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-04 12:18:33,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-10-04 12:18:33,244 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2018-10-04 12:18:33,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:18:33,244 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-10-04 12:18:33,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-04 12:18:33,244 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-10-04 12:18:33,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-04 12:18:33,245 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:18:33,245 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1, 1] [2018-10-04 12:18:33,245 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:18:33,245 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:18:33,246 INFO L82 PathProgramCache]: Analyzing trace with hash 342059208, now seen corresponding path program 22 times [2018-10-04 12:18:33,246 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:18:33,246 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:18:33,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:33,247 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:18:33,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:33,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:18:34,362 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:34,362 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:18:34,362 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 12:18:34,370 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:18:34,500 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:18:34,500 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:18:34,575 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:18:34,719 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:34,742 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:18:34,742 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2018-10-04 12:18:34,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-04 12:18:34,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-04 12:18:34,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=2070, Unknown=0, NotChecked=0, Total=2162 [2018-10-04 12:18:34,743 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 47 states. [2018-10-04 12:18:39,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:18:39,171 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2018-10-04 12:18:39,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-04 12:18:39,172 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 46 [2018-10-04 12:18:39,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:18:39,173 INFO L225 Difference]: With dead ends: 51 [2018-10-04 12:18:39,173 INFO L226 Difference]: Without dead ends: 49 [2018-10-04 12:18:39,174 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=2069, Invalid=5941, Unknown=0, NotChecked=0, Total=8010 [2018-10-04 12:18:39,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-04 12:18:39,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-04 12:18:39,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-04 12:18:39,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-10-04 12:18:39,180 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2018-10-04 12:18:39,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:18:39,181 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-10-04 12:18:39,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-04 12:18:39,181 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-10-04 12:18:39,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-04 12:18:39,181 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:18:39,182 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1, 1] [2018-10-04 12:18:39,182 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:18:39,182 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:18:39,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1993646104, now seen corresponding path program 23 times [2018-10-04 12:18:39,182 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:18:39,182 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:18:39,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:39,183 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:18:39,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:39,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:18:40,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:40,635 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:18:40,635 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:18:40,643 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:18:40,768 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-10-04 12:18:40,769 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:18:40,789 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:18:40,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:40,913 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:18:40,914 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2018-10-04 12:18:40,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-04 12:18:40,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-04 12:18:40,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=2256, Unknown=0, NotChecked=0, Total=2352 [2018-10-04 12:18:40,915 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 49 states. [2018-10-04 12:18:41,428 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 11 [2018-10-04 12:18:41,569 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 11 [2018-10-04 12:18:45,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:18:45,797 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2018-10-04 12:18:45,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-04 12:18:45,799 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 48 [2018-10-04 12:18:45,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:18:45,800 INFO L225 Difference]: With dead ends: 53 [2018-10-04 12:18:45,800 INFO L226 Difference]: Without dead ends: 51 [2018-10-04 12:18:45,801 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=2255, Invalid=6487, Unknown=0, NotChecked=0, Total=8742 [2018-10-04 12:18:45,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-04 12:18:45,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-04 12:18:45,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-04 12:18:45,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-10-04 12:18:45,806 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2018-10-04 12:18:45,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:18:45,807 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-10-04 12:18:45,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-04 12:18:45,807 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-10-04 12:18:45,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-04 12:18:45,807 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:18:45,807 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1, 1] [2018-10-04 12:18:45,808 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:18:45,808 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:18:45,808 INFO L82 PathProgramCache]: Analyzing trace with hash -338555128, now seen corresponding path program 24 times [2018-10-04 12:18:45,808 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:18:45,808 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:18:45,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:45,809 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:18:45,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:45,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:18:47,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:47,456 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:18:47,456 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 12:18:47,463 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:18:47,494 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-04 12:18:47,494 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:18:47,496 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:18:48,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:48,088 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:18:48,089 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2018-10-04 12:18:48,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-04 12:18:48,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-04 12:18:48,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=2450, Unknown=0, NotChecked=0, Total=2550 [2018-10-04 12:18:48,090 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 51 states. [2018-10-04 12:18:48,318 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 9 [2018-10-04 12:18:48,442 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-10-04 12:18:53,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:18:53,440 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2018-10-04 12:18:53,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-04 12:18:53,440 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 50 [2018-10-04 12:18:53,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:18:53,441 INFO L225 Difference]: With dead ends: 55 [2018-10-04 12:18:53,441 INFO L226 Difference]: Without dead ends: 53 [2018-10-04 12:18:53,443 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=2449, Invalid=7057, Unknown=0, NotChecked=0, Total=9506 [2018-10-04 12:18:53,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-04 12:18:53,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-04 12:18:53,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-04 12:18:53,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-10-04 12:18:53,449 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2018-10-04 12:18:53,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:18:53,449 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-10-04 12:18:53,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-04 12:18:53,449 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-10-04 12:18:53,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-04 12:18:53,450 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:18:53,450 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1, 1] [2018-10-04 12:18:53,450 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:18:53,450 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:18:53,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1065973288, now seen corresponding path program 25 times [2018-10-04 12:18:53,450 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:18:53,451 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:18:53,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:53,451 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:18:53,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:18:53,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:18:54,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:54,778 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:18:54,778 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 12:18:54,786 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:18:54,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:18:55,080 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:18:55,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:18:55,185 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:18:55,185 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2018-10-04 12:18:55,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-04 12:18:55,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-04 12:18:55,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=2652, Unknown=0, NotChecked=0, Total=2756 [2018-10-04 12:18:55,187 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 53 states. [2018-10-04 12:18:55,316 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 8 [2018-10-04 12:18:55,432 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 9 [2018-10-04 12:18:55,553 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-04 12:18:55,678 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-04 12:18:55,808 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-10-04 12:18:55,946 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-10-04 12:18:56,782 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 11 [2018-10-04 12:19:01,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:01,155 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2018-10-04 12:19:01,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-04 12:19:01,157 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 52 [2018-10-04 12:19:01,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:01,157 INFO L225 Difference]: With dead ends: 57 [2018-10-04 12:19:01,157 INFO L226 Difference]: Without dead ends: 55 [2018-10-04 12:19:01,158 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=2651, Invalid=7651, Unknown=0, NotChecked=0, Total=10302 [2018-10-04 12:19:01,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-04 12:19:01,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-10-04 12:19:01,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-04 12:19:01,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-10-04 12:19:01,165 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2018-10-04 12:19:01,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:01,165 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-10-04 12:19:01,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-04 12:19:01,165 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-10-04 12:19:01,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-04 12:19:01,166 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:01,166 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1, 1] [2018-10-04 12:19:01,166 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:01,166 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:01,167 INFO L82 PathProgramCache]: Analyzing trace with hash -2096917176, now seen corresponding path program 26 times [2018-10-04 12:19:01,167 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:01,167 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:01,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:01,168 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:19:01,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:01,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:03,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:03,015 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:03,015 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 12:19:03,022 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:19:03,224 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:19:03,224 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:19:03,342 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:03,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:03,480 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:03,480 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2018-10-04 12:19:03,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-04 12:19:03,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-04 12:19:03,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=2862, Unknown=0, NotChecked=0, Total=2970 [2018-10-04 12:19:03,481 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 55 states. [2018-10-04 12:19:03,645 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 8 [2018-10-04 12:19:03,771 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 9 [2018-10-04 12:19:03,902 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-04 12:19:04,048 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-04 12:19:04,201 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-04 12:19:04,341 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-04 12:19:09,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:09,991 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2018-10-04 12:19:09,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-04 12:19:09,992 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 54 [2018-10-04 12:19:09,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:09,993 INFO L225 Difference]: With dead ends: 59 [2018-10-04 12:19:09,993 INFO L226 Difference]: Without dead ends: 57 [2018-10-04 12:19:09,994 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=2861, Invalid=8269, Unknown=0, NotChecked=0, Total=11130 [2018-10-04 12:19:09,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-04 12:19:09,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-04 12:19:09,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-04 12:19:09,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-10-04 12:19:09,999 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2018-10-04 12:19:09,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:09,999 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-10-04 12:19:09,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-04 12:19:09,999 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-10-04 12:19:09,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-04 12:19:09,999 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:10,000 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1, 1] [2018-10-04 12:19:10,000 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:10,000 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:10,000 INFO L82 PathProgramCache]: Analyzing trace with hash -797807512, now seen corresponding path program 27 times [2018-10-04 12:19:10,000 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:10,000 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:10,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:10,001 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:19:10,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:10,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:11,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:11,552 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:11,552 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 12:19:11,559 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:19:11,593 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-10-04 12:19:11,593 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:19:11,595 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:11,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:11,726 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:11,726 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 56 [2018-10-04 12:19:11,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-04 12:19:11,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-04 12:19:11,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=3080, Unknown=0, NotChecked=0, Total=3192 [2018-10-04 12:19:11,727 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 57 states. [2018-10-04 12:19:11,871 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 8 [2018-10-04 12:19:12,017 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 9 [2018-10-04 12:19:12,176 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-04 12:19:12,335 WARN L178 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-04 12:19:12,484 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-04 12:19:12,639 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-04 12:19:12,781 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-04 12:19:13,063 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-10-04 12:19:18,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:18,945 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-10-04 12:19:18,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-04 12:19:18,945 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 56 [2018-10-04 12:19:18,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:18,946 INFO L225 Difference]: With dead ends: 61 [2018-10-04 12:19:18,946 INFO L226 Difference]: Without dead ends: 59 [2018-10-04 12:19:18,947 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1379 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=3079, Invalid=8911, Unknown=0, NotChecked=0, Total=11990 [2018-10-04 12:19:18,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-04 12:19:18,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-04 12:19:18,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-04 12:19:18,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-10-04 12:19:18,953 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2018-10-04 12:19:18,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:18,954 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-10-04 12:19:18,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-04 12:19:18,954 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-10-04 12:19:18,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-04 12:19:18,955 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:18,955 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1, 1] [2018-10-04 12:19:18,955 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:18,955 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:18,955 INFO L82 PathProgramCache]: Analyzing trace with hash 2106063752, now seen corresponding path program 28 times [2018-10-04 12:19:18,956 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:18,956 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:18,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:18,956 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:19:18,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:19,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:20,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:20,723 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:20,723 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 12:19:20,739 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:19:20,986 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:19:20,987 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:19:21,142 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:21,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:21,254 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:21,254 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 58 [2018-10-04 12:19:21,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-04 12:19:21,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-04 12:19:21,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=3306, Unknown=0, NotChecked=0, Total=3422 [2018-10-04 12:19:21,255 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 59 states. [2018-10-04 12:19:21,400 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 8 [2018-10-04 12:19:21,537 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 9 [2018-10-04 12:19:21,708 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-04 12:19:21,856 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-04 12:19:22,006 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-04 12:19:22,149 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-04 12:19:22,300 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-04 12:19:22,475 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-04 12:19:22,651 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-04 12:19:22,819 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-04 12:19:22,981 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-10-04 12:19:29,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:29,059 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2018-10-04 12:19:29,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-04 12:19:29,059 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 58 [2018-10-04 12:19:29,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:29,060 INFO L225 Difference]: With dead ends: 63 [2018-10-04 12:19:29,060 INFO L226 Difference]: Without dead ends: 61 [2018-10-04 12:19:29,061 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1486 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=3305, Invalid=9577, Unknown=0, NotChecked=0, Total=12882 [2018-10-04 12:19:29,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-04 12:19:29,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-04 12:19:29,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-04 12:19:29,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-10-04 12:19:29,066 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2018-10-04 12:19:29,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:29,067 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-10-04 12:19:29,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-04 12:19:29,067 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-10-04 12:19:29,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-04 12:19:29,067 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:29,067 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1, 1] [2018-10-04 12:19:29,068 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:29,068 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:29,068 INFO L82 PathProgramCache]: Analyzing trace with hash 997606056, now seen corresponding path program 29 times [2018-10-04 12:19:29,068 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:29,068 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:29,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:29,069 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:19:29,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:29,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:30,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:30,961 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:30,961 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 12:19:30,969 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:19:31,201 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-10-04 12:19:31,201 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:19:31,237 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:31,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:31,368 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:31,369 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 60 [2018-10-04 12:19:31,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-04 12:19:31,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-04 12:19:31,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=3540, Unknown=0, NotChecked=0, Total=3660 [2018-10-04 12:19:31,370 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 61 states. [2018-10-04 12:19:31,532 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 8 [2018-10-04 12:19:31,679 WARN L178 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 9 [2018-10-04 12:19:31,832 WARN L178 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-04 12:19:31,987 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-04 12:19:32,143 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-04 12:19:32,294 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-04 12:19:32,449 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-04 12:19:32,618 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-04 12:19:32,798 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-04 12:19:32,974 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-04 12:19:33,132 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-04 12:19:33,459 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-10-04 12:19:40,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:40,131 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2018-10-04 12:19:40,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-04 12:19:40,131 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 60 [2018-10-04 12:19:40,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:40,132 INFO L225 Difference]: With dead ends: 65 [2018-10-04 12:19:40,133 INFO L226 Difference]: Without dead ends: 63 [2018-10-04 12:19:40,134 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1597 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=3539, Invalid=10267, Unknown=0, NotChecked=0, Total=13806 [2018-10-04 12:19:40,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-04 12:19:40,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-10-04 12:19:40,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-04 12:19:40,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-10-04 12:19:40,139 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2018-10-04 12:19:40,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:40,140 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-10-04 12:19:40,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-04 12:19:40,140 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-10-04 12:19:40,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-04 12:19:40,140 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:40,141 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1, 1] [2018-10-04 12:19:40,141 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:40,141 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:40,141 INFO L82 PathProgramCache]: Analyzing trace with hash 921649608, now seen corresponding path program 30 times [2018-10-04 12:19:40,141 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:40,141 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:40,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:40,142 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:19:40,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:40,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:42,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:42,141 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:42,141 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 12:19:42,150 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:19:42,193 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-04 12:19:42,194 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:19:42,196 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:42,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:42,309 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:42,309 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 62 [2018-10-04 12:19:42,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-04 12:19:42,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-04 12:19:42,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=3782, Unknown=0, NotChecked=0, Total=3906 [2018-10-04 12:19:42,310 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 63 states. [2018-10-04 12:19:42,473 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 8 [2018-10-04 12:19:42,622 WARN L178 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 9 [2018-10-04 12:19:42,795 WARN L178 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-04 12:19:42,977 WARN L178 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-04 12:19:43,150 WARN L178 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-04 12:19:43,302 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-04 12:19:43,463 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-04 12:19:43,634 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-04 12:19:43,807 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-04 12:19:43,984 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-04 12:19:44,158 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-04 12:19:44,331 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-04 12:19:44,498 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-04 12:19:51,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:19:51,495 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2018-10-04 12:19:51,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-04 12:19:51,496 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 62 [2018-10-04 12:19:51,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:19:51,496 INFO L225 Difference]: With dead ends: 67 [2018-10-04 12:19:51,497 INFO L226 Difference]: Without dead ends: 65 [2018-10-04 12:19:51,498 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1712 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=3781, Invalid=10981, Unknown=0, NotChecked=0, Total=14762 [2018-10-04 12:19:51,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-04 12:19:51,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-10-04 12:19:51,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-04 12:19:51,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-10-04 12:19:51,502 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2018-10-04 12:19:51,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:19:51,502 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-10-04 12:19:51,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-04 12:19:51,503 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-10-04 12:19:51,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-04 12:19:51,503 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:19:51,503 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1, 1] [2018-10-04 12:19:51,503 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:19:51,503 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:19:51,504 INFO L82 PathProgramCache]: Analyzing trace with hash 941947112, now seen corresponding path program 31 times [2018-10-04 12:19:51,504 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:19:51,504 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:19:51,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:51,505 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:19:51,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:19:51,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:53,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:53,840 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:19:53,840 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 12:19:53,848 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:19:54,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:19:54,385 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:19:54,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:19:54,501 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:19:54,501 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 64 [2018-10-04 12:19:54,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-04 12:19:54,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-04 12:19:54,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=4032, Unknown=0, NotChecked=0, Total=4160 [2018-10-04 12:19:54,502 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 65 states. [2018-10-04 12:19:54,672 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 8 [2018-10-04 12:19:54,839 WARN L178 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 9 [2018-10-04 12:19:55,006 WARN L178 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-04 12:19:55,174 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-04 12:19:55,347 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-04 12:19:55,516 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-04 12:19:55,688 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-04 12:19:55,863 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-04 12:19:56,040 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-04 12:19:56,223 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-04 12:19:56,403 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-04 12:19:56,579 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-04 12:19:56,748 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-04 12:19:56,922 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-04 12:19:57,121 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-04 12:20:04,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:20:04,545 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2018-10-04 12:20:04,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-04 12:20:04,546 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 64 [2018-10-04 12:20:04,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:20:04,547 INFO L225 Difference]: With dead ends: 69 [2018-10-04 12:20:04,547 INFO L226 Difference]: Without dead ends: 67 [2018-10-04 12:20:04,548 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1831 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=4031, Invalid=11719, Unknown=0, NotChecked=0, Total=15750 [2018-10-04 12:20:04,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-04 12:20:04,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-10-04 12:20:04,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-04 12:20:04,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-10-04 12:20:04,553 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2018-10-04 12:20:04,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:20:04,553 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-10-04 12:20:04,553 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-04 12:20:04,553 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-10-04 12:20:04,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-04 12:20:04,554 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:20:04,554 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1, 1] [2018-10-04 12:20:04,554 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:20:04,554 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:20:04,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1026988024, now seen corresponding path program 32 times [2018-10-04 12:20:04,555 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:20:04,555 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:20:04,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:04,556 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:20:04,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:04,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:20:06,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:06,771 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:20:06,771 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 12:20:06,778 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:20:07,146 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:20:07,146 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:20:07,371 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:20:07,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:07,534 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:20:07,535 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 66 [2018-10-04 12:20:07,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-04 12:20:07,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-04 12:20:07,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=4290, Unknown=0, NotChecked=0, Total=4422 [2018-10-04 12:20:07,536 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 67 states. [2018-10-04 12:20:07,729 WARN L178 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 8 [2018-10-04 12:20:07,897 WARN L178 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 9 [2018-10-04 12:20:08,070 WARN L178 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-04 12:20:08,254 WARN L178 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-04 12:20:08,458 WARN L178 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-04 12:20:08,655 WARN L178 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-04 12:20:08,846 WARN L178 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-04 12:20:09,030 WARN L178 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-04 12:20:09,227 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-04 12:20:09,421 WARN L178 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-04 12:20:09,609 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-04 12:20:09,800 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-04 12:20:09,989 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-04 12:20:10,175 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-04 12:20:10,378 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-04 12:20:10,575 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-04 12:20:10,778 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-04 12:20:10,979 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-04 12:20:11,178 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-10-04 12:20:11,382 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-10-04 12:20:11,588 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 11 [2018-10-04 12:20:12,639 WARN L178 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 11 [2018-10-04 12:20:18,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:20:18,367 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2018-10-04 12:20:18,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-04 12:20:18,368 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 66 [2018-10-04 12:20:18,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:20:18,369 INFO L225 Difference]: With dead ends: 71 [2018-10-04 12:20:18,369 INFO L226 Difference]: Without dead ends: 69 [2018-10-04 12:20:18,370 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1954 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=4289, Invalid=12481, Unknown=0, NotChecked=0, Total=16770 [2018-10-04 12:20:18,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-04 12:20:18,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-10-04 12:20:18,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-04 12:20:18,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-10-04 12:20:18,375 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2018-10-04 12:20:18,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:20:18,376 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-10-04 12:20:18,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-04 12:20:18,376 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-10-04 12:20:18,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-04 12:20:18,377 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:20:18,377 INFO L375 BasicCegarLoop]: trace histogram [65, 1, 1, 1] [2018-10-04 12:20:18,377 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:20:18,377 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:20:18,377 INFO L82 PathProgramCache]: Analyzing trace with hash 906923816, now seen corresponding path program 33 times [2018-10-04 12:20:18,377 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:20:18,377 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:20:18,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:18,378 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:20:18,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:18,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:20:20,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:20,955 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:20:20,955 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 12:20:20,963 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:20:21,009 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-10-04 12:20:21,010 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:20:21,012 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:20:21,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:21,179 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:20:21,179 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 68 [2018-10-04 12:20:21,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-04 12:20:21,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-04 12:20:21,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=4556, Unknown=0, NotChecked=0, Total=4692 [2018-10-04 12:20:21,180 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 69 states. [2018-10-04 12:20:21,380 WARN L178 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 8 [2018-10-04 12:20:21,564 WARN L178 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 9 [2018-10-04 12:20:21,750 WARN L178 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-04 12:20:21,945 WARN L178 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-04 12:20:22,138 WARN L178 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-04 12:20:22,340 WARN L178 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-04 12:20:22,539 WARN L178 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-04 12:20:22,728 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-04 12:20:22,923 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-04 12:20:23,118 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-04 12:20:23,327 WARN L178 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-04 12:20:23,529 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-04 12:20:23,742 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-04 12:20:23,983 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-04 12:20:24,204 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-04 12:20:24,415 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-04 12:20:24,627 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-04 12:20:24,847 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-04 12:20:25,063 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-04 12:20:25,271 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-04 12:20:25,482 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-10-04 12:20:25,916 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 11 [2018-10-04 12:20:32,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:20:32,929 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-10-04 12:20:32,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-04 12:20:32,930 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 68 [2018-10-04 12:20:32,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:20:32,931 INFO L225 Difference]: With dead ends: 73 [2018-10-04 12:20:32,931 INFO L226 Difference]: Without dead ends: 71 [2018-10-04 12:20:32,931 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2081 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=4555, Invalid=13267, Unknown=0, NotChecked=0, Total=17822 [2018-10-04 12:20:32,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-04 12:20:32,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-10-04 12:20:32,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-04 12:20:32,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-10-04 12:20:32,936 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2018-10-04 12:20:32,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:20:32,936 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-10-04 12:20:32,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-04 12:20:32,937 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-10-04 12:20:32,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-04 12:20:32,937 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:20:32,937 INFO L375 BasicCegarLoop]: trace histogram [67, 1, 1, 1] [2018-10-04 12:20:32,937 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:20:32,938 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:20:32,938 INFO L82 PathProgramCache]: Analyzing trace with hash -324637112, now seen corresponding path program 34 times [2018-10-04 12:20:32,938 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:20:32,938 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:20:32,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:32,939 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:20:32,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:33,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:20:35,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:35,625 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:20:35,625 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 12:20:35,633 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:20:36,059 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:20:36,059 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:20:36,321 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:20:36,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:36,444 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:20:36,445 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 70 [2018-10-04 12:20:36,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-04 12:20:36,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-04 12:20:36,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=4830, Unknown=0, NotChecked=0, Total=4970 [2018-10-04 12:20:36,446 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 71 states. [2018-10-04 12:20:36,641 WARN L178 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 8 [2018-10-04 12:20:36,834 WARN L178 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 9 [2018-10-04 12:20:37,023 WARN L178 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-10-04 12:20:37,225 WARN L178 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-10-04 12:20:37,425 WARN L178 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-04 12:20:37,628 WARN L178 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-04 12:20:37,828 WARN L178 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-04 12:20:38,034 WARN L178 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-04 12:20:38,245 WARN L178 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-04 12:20:38,452 WARN L178 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-04 12:20:38,667 WARN L178 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-04 12:20:38,886 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-04 12:20:39,098 WARN L178 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-04 12:20:39,315 WARN L178 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-04 12:20:39,542 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-04 12:20:39,755 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-04 12:20:39,979 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-04 12:20:40,207 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-04 12:20:40,431 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-04 12:20:40,657 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-04 12:20:40,889 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-04 12:20:41,110 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-04 12:20:48,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:20:48,977 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2018-10-04 12:20:48,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-04 12:20:48,977 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 70 [2018-10-04 12:20:48,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:20:48,978 INFO L225 Difference]: With dead ends: 75 [2018-10-04 12:20:48,979 INFO L226 Difference]: Without dead ends: 73 [2018-10-04 12:20:48,980 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2212 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=4829, Invalid=14077, Unknown=0, NotChecked=0, Total=18906 [2018-10-04 12:20:48,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-04 12:20:48,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-10-04 12:20:48,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-04 12:20:48,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-10-04 12:20:48,986 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2018-10-04 12:20:48,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:20:48,986 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-10-04 12:20:48,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-04 12:20:48,987 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-10-04 12:20:48,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-04 12:20:48,987 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:20:48,987 INFO L375 BasicCegarLoop]: trace histogram [69, 1, 1, 1] [2018-10-04 12:20:48,988 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:20:48,988 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:20:48,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1556284776, now seen corresponding path program 35 times [2018-10-04 12:20:48,988 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:20:48,988 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:20:48,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:48,989 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:20:48,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:20:49,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:20:51,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:51,818 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:20:51,818 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 12:20:51,825 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:20:52,207 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-10-04 12:20:52,208 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:20:52,267 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:20:52,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:20:52,550 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:20:52,550 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 72 [2018-10-04 12:20:52,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-04 12:20:52,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-04 12:20:52,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=5112, Unknown=0, NotChecked=0, Total=5256 [2018-10-04 12:20:52,551 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 73 states. [2018-10-04 12:20:52,761 WARN L178 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 8 [2018-10-04 12:20:52,960 WARN L178 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 9 [2018-10-04 12:20:53,169 WARN L178 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-10-04 12:20:53,385 WARN L178 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-10-04 12:20:53,590 WARN L178 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-10-04 12:20:53,797 WARN L178 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-10-04 12:20:54,010 WARN L178 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-04 12:20:54,217 WARN L178 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-04 12:20:54,441 WARN L178 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-04 12:20:54,683 WARN L178 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-04 12:20:54,914 WARN L178 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-04 12:20:55,149 WARN L178 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-04 12:20:55,382 WARN L178 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-04 12:20:55,597 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-04 12:20:55,838 WARN L178 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-04 12:20:56,062 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-04 12:20:56,290 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-04 12:20:56,520 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-04 12:20:56,761 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-04 12:20:57,003 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-04 12:20:57,249 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-04 12:20:57,476 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-04 12:20:57,713 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-04 12:20:57,935 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-04 12:20:58,167 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-10-04 12:20:58,391 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-10-04 12:21:06,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:21:06,294 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2018-10-04 12:21:06,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-04 12:21:06,295 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 72 [2018-10-04 12:21:06,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:21:06,296 INFO L225 Difference]: With dead ends: 77 [2018-10-04 12:21:06,296 INFO L226 Difference]: Without dead ends: 75 [2018-10-04 12:21:06,297 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2347 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=5111, Invalid=14911, Unknown=0, NotChecked=0, Total=20022 [2018-10-04 12:21:06,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-04 12:21:06,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-10-04 12:21:06,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-04 12:21:06,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-10-04 12:21:06,303 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2018-10-04 12:21:06,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:21:06,303 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-10-04 12:21:06,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-04 12:21:06,304 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-10-04 12:21:06,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-04 12:21:06,304 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:21:06,304 INFO L375 BasicCegarLoop]: trace histogram [71, 1, 1, 1] [2018-10-04 12:21:06,305 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:21:06,305 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:21:06,305 INFO L82 PathProgramCache]: Analyzing trace with hash 940987528, now seen corresponding path program 36 times [2018-10-04 12:21:06,305 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:21:06,305 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:21:06,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:21:06,306 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:21:06,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:21:06,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:21:09,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:21:09,256 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:21:09,256 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 12:21:09,265 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:21:09,313 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-04 12:21:09,314 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:21:09,318 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:21:09,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:21:09,499 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:21:09,500 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 74 [2018-10-04 12:21:09,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-04 12:21:09,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-04 12:21:09,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=5402, Unknown=0, NotChecked=0, Total=5550 [2018-10-04 12:21:09,501 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 75 states. [2018-10-04 12:21:09,748 WARN L178 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 8 [2018-10-04 12:21:09,985 WARN L178 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 9 [2018-10-04 12:21:10,216 WARN L178 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-10-04 12:21:10,435 WARN L178 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-10-04 12:21:10,660 WARN L178 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-10-04 12:21:10,874 WARN L178 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-10-04 12:21:11,095 WARN L178 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-10-04 12:21:11,315 WARN L178 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-10-04 12:21:11,541 WARN L178 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-04 12:21:11,768 WARN L178 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-04 12:21:11,991 WARN L178 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-04 12:21:12,220 WARN L178 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-04 12:21:12,444 WARN L178 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-04 12:21:12,666 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-04 12:21:12,911 WARN L178 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-04 12:21:13,155 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-04 12:21:13,394 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-04 12:21:13,639 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-04 12:21:13,892 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-04 12:21:14,136 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-04 12:21:14,386 WARN L178 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-04 12:21:14,633 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-04 12:21:14,883 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-04 12:21:15,160 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-04 12:21:15,423 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-04 12:21:15,655 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-04 12:21:24,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:21:24,296 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2018-10-04 12:21:24,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-04 12:21:24,297 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 74 [2018-10-04 12:21:24,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:21:24,297 INFO L225 Difference]: With dead ends: 79 [2018-10-04 12:21:24,297 INFO L226 Difference]: Without dead ends: 77 [2018-10-04 12:21:24,299 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2486 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=5401, Invalid=15769, Unknown=0, NotChecked=0, Total=21170 [2018-10-04 12:21:24,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-04 12:21:24,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-10-04 12:21:24,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-04 12:21:24,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-10-04 12:21:24,306 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2018-10-04 12:21:24,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:21:24,306 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-10-04 12:21:24,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-04 12:21:24,306 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-10-04 12:21:24,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-04 12:21:24,307 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:21:24,307 INFO L375 BasicCegarLoop]: trace histogram [73, 1, 1, 1] [2018-10-04 12:21:24,307 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:21:24,307 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:21:24,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1949148248, now seen corresponding path program 37 times [2018-10-04 12:21:24,307 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:21:24,308 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:21:24,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:21:24,308 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:21:24,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:21:24,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:21:27,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:21:27,540 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:21:27,540 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 12:21:27,547 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:21:28,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:21:28,434 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:21:28,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:21:28,571 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:21:28,571 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 76 [2018-10-04 12:21:28,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-04 12:21:28,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-04 12:21:28,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=5700, Unknown=0, NotChecked=0, Total=5852 [2018-10-04 12:21:28,572 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 77 states. [2018-10-04 12:21:28,800 WARN L178 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 8 [2018-10-04 12:21:29,011 WARN L178 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 9 [2018-10-04 12:21:29,240 WARN L178 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-10-04 12:21:29,464 WARN L178 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-10-04 12:21:29,699 WARN L178 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-10-04 12:21:29,927 WARN L178 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-10-04 12:21:30,154 WARN L178 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-10-04 12:21:30,392 WARN L178 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-10-04 12:21:30,645 WARN L178 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-10-04 12:21:30,898 WARN L178 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-10-04 12:21:31,136 WARN L178 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-04 12:21:31,375 WARN L178 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-04 12:21:31,618 WARN L178 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-04 12:21:31,843 WARN L178 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-04 12:21:32,096 WARN L178 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-04 12:21:32,351 WARN L178 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-04 12:21:32,598 WARN L178 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-04 12:21:32,863 WARN L178 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-04 12:21:33,120 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-04 12:21:33,375 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-04 12:21:33,648 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-04 12:21:33,902 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-04 12:21:34,161 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-04 12:21:34,415 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-04 12:21:34,680 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-04 12:21:34,943 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-04 12:21:35,213 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-04 12:21:35,469 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-04 12:21:35,752 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-10-04 12:21:44,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:21:44,293 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2018-10-04 12:21:44,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-04 12:21:44,294 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 76 [2018-10-04 12:21:44,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:21:44,295 INFO L225 Difference]: With dead ends: 81 [2018-10-04 12:21:44,295 INFO L226 Difference]: Without dead ends: 79 [2018-10-04 12:21:44,296 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2629 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=5699, Invalid=16651, Unknown=0, NotChecked=0, Total=22350 [2018-10-04 12:21:44,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-04 12:21:44,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-10-04 12:21:44,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-04 12:21:44,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-10-04 12:21:44,302 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2018-10-04 12:21:44,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:21:44,302 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-10-04 12:21:44,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-04 12:21:44,303 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-10-04 12:21:44,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-04 12:21:44,303 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:21:44,303 INFO L375 BasicCegarLoop]: trace histogram [75, 1, 1, 1] [2018-10-04 12:21:44,304 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:21:44,304 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:21:44,304 INFO L82 PathProgramCache]: Analyzing trace with hash -525788472, now seen corresponding path program 38 times [2018-10-04 12:21:44,304 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:21:44,304 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:21:44,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:21:44,305 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:21:44,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:21:44,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:21:47,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:21:47,850 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:21:47,850 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 12:21:47,859 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:21:48,443 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:21:48,444 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:21:48,823 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:21:48,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:21:48,959 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:21:48,960 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 78 [2018-10-04 12:21:48,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-10-04 12:21:48,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-10-04 12:21:48,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=6006, Unknown=0, NotChecked=0, Total=6162 [2018-10-04 12:21:48,960 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 79 states. [2018-10-04 12:21:49,202 WARN L178 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 8 [2018-10-04 12:21:49,418 WARN L178 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 9 [2018-10-04 12:21:49,641 WARN L178 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-10-04 12:21:49,862 WARN L178 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-10-04 12:21:50,083 WARN L178 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-10-04 12:21:50,301 WARN L178 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-10-04 12:21:50,533 WARN L178 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-10-04 12:21:50,767 WARN L178 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-10-04 12:21:51,037 WARN L178 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-10-04 12:21:51,284 WARN L178 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-10-04 12:21:51,538 WARN L178 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-10-04 12:21:51,795 WARN L178 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-10-04 12:21:52,048 WARN L178 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-04 12:21:52,307 WARN L178 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-04 12:21:52,581 WARN L178 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-04 12:21:52,848 WARN L178 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-04 12:21:53,116 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-04 12:21:53,384 WARN L178 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-04 12:21:53,656 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-04 12:21:53,934 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-04 12:21:54,225 WARN L178 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-04 12:21:54,503 WARN L178 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-04 12:21:54,774 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-04 12:21:55,053 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-04 12:21:55,325 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-04 12:21:55,609 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-04 12:21:55,886 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-04 12:21:56,181 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-04 12:21:56,479 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-04 12:21:56,749 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 Received shutdown request... [2018-10-04 12:21:58,279 WARN L186 SmtUtils]: Removed 26 from assertion stack [2018-10-04 12:21:58,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-04 12:21:58,279 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-04 12:21:58,284 WARN L205 ceAbstractionStarter]: Timeout [2018-10-04 12:21:58,284 INFO L202 PluginConnector]: Adding new model count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.10 12:21:58 BoogieIcfgContainer [2018-10-04 12:21:58,284 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-04 12:21:58,285 INFO L168 Benchmark]: Toolchain (without parser) took 255176.55 ms. Allocated memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: -208.1 MB). Free memory was 1.5 GB in the beginning and 978.3 MB in the end (delta: 491.0 MB). Peak memory consumption was 282.8 MB. Max. memory is 7.1 GB. [2018-10-04 12:21:58,286 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 12:21:58,286 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.36 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 12:21:58,286 INFO L168 Benchmark]: Boogie Preprocessor took 20.59 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 12:21:58,286 INFO L168 Benchmark]: RCFGBuilder took 299.67 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-04 12:21:58,286 INFO L168 Benchmark]: TraceAbstraction took 254808.86 ms. Allocated memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: -208.1 MB). Free memory was 1.4 GB in the beginning and 978.3 MB in the end (delta: 469.8 MB). Peak memory consumption was 261.7 MB. Max. memory is 7.1 GB. [2018-10-04 12:21:58,288 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 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 40.36 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 20.59 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 299.67 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 254808.86 ms. Allocated memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: -208.1 MB). Free memory was 1.4 GB in the beginning and 978.3 MB in the end (delta: 469.8 MB). Peak memory consumption was 261.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 39]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 39). Cancelled while BasicCegarLoop was constructing difference of abstraction (79states) and FLOYD_HOARE automaton (currently 37 states, 79 states before enhancement), while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 131. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 254.7s OverallTime, 39 OverallIterations, 75 TraceHistogramMax, 192.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 115 SDtfs, 0 SDslu, 1427 SDs, 0 SdLazy, 3080 SolverSat, 1443 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4446 GetRequests, 1521 SyntacticMatches, 0 SemanticMatches, 2924 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33745 ImplicationChecksByTransitivity, 233.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=79occurred in iteration=38, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 38 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 8.7s SatisfiabilityAnalysisTime, 51.7s InterpolantComputationTime, 3119 NumberOfCodeBlocks, 3119 NumberOfCodeBlocksAsserted, 444 NumberOfCheckSat, 3042 ConstructedInterpolants, 0 QuantifiedInterpolants, 781682 SizeOfPredicates, 76 NumberOfNonLiveVariables, 4978 ConjunctsInSsa, 1584 ConjunctsInUnsatCore, 77 InterpolantComputations, 1 PerfectInterpolantSequences, 0/74594 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-04_12-21-58-296.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/count_by_k.i_3.bplTransformedIcfg_BEv2_3.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-04_12-21-58-296.csv Completed graceful shutdown