java -Xss4m -Xmx4000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCHC_wBE.xml --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf -i /storage/chc-comp/hopv/lia/mochi/enc-zip_map2.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-14921ce [2018-06-24 21:16:12,924 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-24 21:16:12,927 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-24 21:16:12,941 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-24 21:16:12,942 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-24 21:16:12,942 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-24 21:16:12,944 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-24 21:16:12,946 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-24 21:16:12,947 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-24 21:16:12,948 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-24 21:16:12,950 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-24 21:16:12,950 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-24 21:16:12,951 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-24 21:16:12,952 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-24 21:16:12,955 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-24 21:16:12,956 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-24 21:16:12,957 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-24 21:16:12,969 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-24 21:16:12,970 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-24 21:16:12,971 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-24 21:16:12,972 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-24 21:16:12,974 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-24 21:16:12,975 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-24 21:16:12,975 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-24 21:16:12,975 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-24 21:16:12,976 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-24 21:16:12,977 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-24 21:16:12,978 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-24 21:16:12,979 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-24 21:16:12,979 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-24 21:16:12,979 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-24 21:16:12,980 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-24 21:16:12,980 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-24 21:16:12,981 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-24 21:16:12,981 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-24 21:16:12,982 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-24 21:16:13,000 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-24 21:16:13,000 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-24 21:16:13,001 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-24 21:16:13,001 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-24 21:16:13,002 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-24 21:16:13,002 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-24 21:16:13,002 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-24 21:16:13,002 INFO L133 SettingsManager]: * Use SBE=true [2018-06-24 21:16:13,003 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-24 21:16:13,003 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-24 21:16:13,003 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-24 21:16:13,003 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-24 21:16:13,003 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-24 21:16:13,004 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-24 21:16:13,004 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-24 21:16:13,004 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-24 21:16:13,004 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-24 21:16:13,004 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-24 21:16:13,005 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-24 21:16:13,005 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-24 21:16:13,005 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-24 21:16:13,006 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-24 21:16:13,006 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-24 21:16:13,054 INFO ]: Repository-Root is: /tmp [2018-06-24 21:16:13,070 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-24 21:16:13,076 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-24 21:16:13,078 INFO ]: Initializing SmtParser... [2018-06-24 21:16:13,078 INFO ]: SmtParser initialized [2018-06-24 21:16:13,079 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/hopv/lia/mochi/enc-zip_map2.smt2 [2018-06-24 21:16:13,080 INFO ]: Parsing .smt2 file as a set of Horn Clauses No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-06-24 21:16:13,165 INFO ]: Executing SMT file /storage/chc-comp/hopv/lia/mochi/enc-zip_map2.smt2 unknown [2018-06-24 21:16:13,369 INFO ]: Succesfully executed SMT file /storage/chc-comp/hopv/lia/mochi/enc-zip_map2.smt2 [2018-06-24 21:16:13,374 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-24 21:16:13,380 INFO ]: Walking toolchain with 5 elements. [2018-06-24 21:16:13,380 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-24 21:16:13,380 INFO ]: Initializing ChcToBoogie... [2018-06-24 21:16:13,380 INFO ]: ChcToBoogie initialized [2018-06-24 21:16:13,383 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 24.06 09:16:13" (1/1) ... [2018-06-24 21:16:13,433 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:16:13 Unit [2018-06-24 21:16:13,433 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-24 21:16:13,434 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-24 21:16:13,434 INFO ]: Initializing Boogie Preprocessor... [2018-06-24 21:16:13,434 INFO ]: Boogie Preprocessor initialized [2018-06-24 21:16:13,448 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:16:13" (1/1) ... [2018-06-24 21:16:13,448 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:16:13" (1/1) ... [2018-06-24 21:16:13,451 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:16:13" (1/1) ... [2018-06-24 21:16:13,452 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:16:13" (1/1) ... [2018-06-24 21:16:13,455 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:16:13" (1/1) ... [2018-06-24 21:16:13,457 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:16:13" (1/1) ... [2018-06-24 21:16:13,458 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:16:13" (1/1) ... [2018-06-24 21:16:13,460 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-24 21:16:13,460 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-24 21:16:13,460 INFO ]: Initializing RCFGBuilder... [2018-06-24 21:16:13,460 INFO ]: RCFGBuilder initialized [2018-06-24 21:16:13,465 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:16:13" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 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 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-24 21:16:13,472 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-24 21:16:13,472 INFO ]: Found specification of procedure gotoProc [2018-06-24 21:16:13,472 INFO ]: Found implementation of procedure gotoProc [2018-06-24 21:16:13,472 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-24 21:16:13,472 INFO ]: Found specification of procedure Ultimate.START [2018-06-24 21:16:13,472 INFO ]: Found implementation of procedure Ultimate.START [2018-06-24 21:16:13,742 INFO ]: Using library mode [2018-06-24 21:16:13,743 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.06 09:16:13 BoogieIcfgContainer [2018-06-24 21:16:13,743 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-24 21:16:13,743 INFO ]: ------------------------BlockEncodingV2---------------------------- [2018-06-24 21:16:13,743 INFO ]: Initializing BlockEncodingV2... [2018-06-24 21:16:13,744 INFO ]: BlockEncodingV2 initialized [2018-06-24 21:16:13,745 INFO ]: Executing the observer BlockEncodingObserver from plugin BlockEncodingV2 for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.06 09:16:13" (1/1) ... [2018-06-24 21:16:13,761 INFO ]: Initial Icfg 17 locations, 25 edges [2018-06-24 21:16:13,762 INFO ]: Using Remove infeasible edges [2018-06-24 21:16:13,763 INFO ]: Using Maximize final states [2018-06-24 21:16:13,763 INFO ]: Using Minimize states even if more edges are added than removed.=false [2018-06-24 21:16:13,764 INFO ]: Using Minimize states using LBE with the strategy=MULTI [2018-06-24 21:16:13,765 INFO ]: Using Remove sink states [2018-06-24 21:16:13,768 INFO ]: Using Apply optimizations until nothing changes=true [2018-06-24 21:16:13,768 INFO ]: Using Use SBE [2018-06-24 21:16:13,782 INFO ]: SBE split 0 edges [2018-06-24 21:16:13,787 INFO ]: Removed 3 edges and 2 locations because of local infeasibility [2018-06-24 21:16:13,789 INFO ]: 0 new accepting states [2018-06-24 21:16:13,884 INFO ]: Removed 13 edges and 4 locations by large block encoding [2018-06-24 21:16:13,886 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-24 21:16:13,888 INFO ]: Removed 0 edges and 0 locations because of local infeasibility [2018-06-24 21:16:13,888 INFO ]: 0 new accepting states [2018-06-24 21:16:13,888 INFO ]: Removed 0 edges and 0 locations by large block encoding [2018-06-24 21:16:13,888 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-24 21:16:13,888 INFO ]: Encoded RCFG 11 locations, 18 edges [2018-06-24 21:16:13,889 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 24.06 09:16:13 BasicIcfg [2018-06-24 21:16:13,889 INFO ]: ------------------------ END BlockEncodingV2---------------------------- [2018-06-24 21:16:13,890 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-24 21:16:13,890 INFO ]: Initializing TraceAbstraction... [2018-06-24 21:16:13,893 INFO ]: TraceAbstraction initialized [2018-06-24 21:16:13,893 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 24.06 09:16:13" (1/4) ... [2018-06-24 21:16:13,894 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d839d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 24.06 09:16:13, skipping insertion in model container [2018-06-24 21:16:13,894 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:16:13" (2/4) ... [2018-06-24 21:16:13,894 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d839d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.06 09:16:13, skipping insertion in model container [2018-06-24 21:16:13,894 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.06 09:16:13" (3/4) ... [2018-06-24 21:16:13,894 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d839d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.06 09:16:13, skipping insertion in model container [2018-06-24 21:16:13,895 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 24.06 09:16:13" (4/4) ... [2018-06-24 21:16:13,897 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver_BEv2 [2018-06-24 21:16:13,906 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-24 21:16:13,923 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-24 21:16:13,956 INFO ]: Using default assertion order modulation [2018-06-24 21:16:13,956 INFO ]: Interprodecural is true [2018-06-24 21:16:13,956 INFO ]: Hoare is false [2018-06-24 21:16:13,956 INFO ]: Compute interpolants for FPandBP [2018-06-24 21:16:13,956 INFO ]: Backedges is TWOTRACK [2018-06-24 21:16:13,956 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-24 21:16:13,956 INFO ]: Difference is false [2018-06-24 21:16:13,956 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-24 21:16:13,956 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-24 21:16:13,965 INFO ]: Start isEmpty. Operand 11 states. [2018-06-24 21:16:13,976 INFO ]: Finished isEmpty. Found accepting run of length 6 [2018-06-24 21:16:13,976 INFO ]: Found error trace [2018-06-24 21:16:13,976 INFO ]: trace histogram [1, 1, 1, 1, 1] [2018-06-24 21:16:13,977 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:16:13,981 INFO ]: Analyzing trace with hash 35035878, now seen corresponding path program 1 times [2018-06-24 21:16:13,983 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:16:13,983 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:16:14,013 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:16:14,013 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:16:14,013 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:16:14,055 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:16:14,111 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 21:16:14,113 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-24 21:16:14,113 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-24 21:16:14,115 INFO ]: Interpolant automaton has 3 states [2018-06-24 21:16:14,126 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-24 21:16:14,126 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-24 21:16:14,128 INFO ]: Start difference. First operand 11 states. Second operand 3 states. [2018-06-24 21:16:14,184 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:16:14,184 INFO ]: Finished difference Result 12 states and 19 transitions. [2018-06-24 21:16:14,185 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-24 21:16:14,186 INFO ]: Start accepts. Automaton has 3 states. Word has length 5 [2018-06-24 21:16:14,186 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:16:14,195 INFO ]: With dead ends: 12 [2018-06-24 21:16:14,195 INFO ]: Without dead ends: 11 [2018-06-24 21:16:14,197 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-24 21:16:14,217 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-24 21:16:14,242 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-24 21:16:14,245 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-24 21:16:14,245 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 16 transitions. [2018-06-24 21:16:14,246 INFO ]: Start accepts. Automaton has 11 states and 16 transitions. Word has length 5 [2018-06-24 21:16:14,246 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:16:14,246 INFO ]: Abstraction has 11 states and 16 transitions. [2018-06-24 21:16:14,246 INFO ]: Interpolant automaton has 3 states. [2018-06-24 21:16:14,246 INFO ]: Start isEmpty. Operand 11 states and 16 transitions. [2018-06-24 21:16:14,247 INFO ]: Finished isEmpty. Found accepting run of length 6 [2018-06-24 21:16:14,247 INFO ]: Found error trace [2018-06-24 21:16:14,247 INFO ]: trace histogram [1, 1, 1, 1, 1] [2018-06-24 21:16:14,248 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:16:14,248 INFO ]: Analyzing trace with hash 35095460, now seen corresponding path program 1 times [2018-06-24 21:16:14,248 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:16:14,248 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:16:14,248 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:16:14,248 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:16:14,248 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:16:14,260 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:16:14,286 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 21:16:14,286 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-24 21:16:14,286 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-24 21:16:14,288 INFO ]: Interpolant automaton has 3 states [2018-06-24 21:16:14,288 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-24 21:16:14,288 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-24 21:16:14,288 INFO ]: Start difference. First operand 11 states and 16 transitions. Second operand 3 states. [2018-06-24 21:16:14,374 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:16:14,374 INFO ]: Finished difference Result 16 states and 24 transitions. [2018-06-24 21:16:14,375 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-24 21:16:14,375 INFO ]: Start accepts. Automaton has 3 states. Word has length 5 [2018-06-24 21:16:14,375 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:16:14,376 INFO ]: With dead ends: 16 [2018-06-24 21:16:14,376 INFO ]: Without dead ends: 16 [2018-06-24 21:16:14,377 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-24 21:16:14,377 INFO ]: Start minimizeSevpa. Operand 16 states. [2018-06-24 21:16:14,381 INFO ]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-06-24 21:16:14,381 INFO ]: Start removeUnreachable. Operand 16 states. [2018-06-24 21:16:14,381 INFO ]: Finished removeUnreachable. Reduced from 16 states to 16 states and 24 transitions. [2018-06-24 21:16:14,381 INFO ]: Start accepts. Automaton has 16 states and 24 transitions. Word has length 5 [2018-06-24 21:16:14,382 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:16:14,382 INFO ]: Abstraction has 16 states and 24 transitions. [2018-06-24 21:16:14,382 INFO ]: Interpolant automaton has 3 states. [2018-06-24 21:16:14,382 INFO ]: Start isEmpty. Operand 16 states and 24 transitions. [2018-06-24 21:16:14,383 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-24 21:16:14,383 INFO ]: Found error trace [2018-06-24 21:16:14,383 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-24 21:16:14,383 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:16:14,383 INFO ]: Analyzing trace with hash -747594446, now seen corresponding path program 1 times [2018-06-24 21:16:14,383 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:16:14,383 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:16:14,384 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:16:14,384 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:16:14,384 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:16:14,393 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:16:14,526 INFO ]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-24 21:16:14,526 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-24 21:16:14,526 INFO ]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-06-24 21:16:14,527 INFO ]: Interpolant automaton has 6 states [2018-06-24 21:16:14,527 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-24 21:16:14,527 INFO ]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-06-24 21:16:14,527 INFO ]: Start difference. First operand 16 states and 24 transitions. Second operand 6 states. [2018-06-24 21:16:15,162 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:16:15,162 INFO ]: Finished difference Result 24 states and 37 transitions. [2018-06-24 21:16:15,165 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-24 21:16:15,165 INFO ]: Start accepts. Automaton has 6 states. Word has length 10 [2018-06-24 21:16:15,165 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:16:15,168 INFO ]: With dead ends: 24 [2018-06-24 21:16:15,168 INFO ]: Without dead ends: 18 [2018-06-24 21:16:15,168 INFO ]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2018-06-24 21:16:15,168 INFO ]: Start minimizeSevpa. Operand 18 states. [2018-06-24 21:16:15,175 INFO ]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-06-24 21:16:15,175 INFO ]: Start removeUnreachable. Operand 18 states. [2018-06-24 21:16:15,176 INFO ]: Finished removeUnreachable. Reduced from 18 states to 18 states and 26 transitions. [2018-06-24 21:16:15,176 INFO ]: Start accepts. Automaton has 18 states and 26 transitions. Word has length 10 [2018-06-24 21:16:15,176 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:16:15,176 INFO ]: Abstraction has 18 states and 26 transitions. [2018-06-24 21:16:15,176 INFO ]: Interpolant automaton has 6 states. [2018-06-24 21:16:15,176 INFO ]: Start isEmpty. Operand 18 states and 26 transitions. [2018-06-24 21:16:15,177 INFO ]: Finished isEmpty. Found accepting run of length 16 [2018-06-24 21:16:15,177 INFO ]: Found error trace [2018-06-24 21:16:15,177 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-24 21:16:15,177 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:16:15,177 INFO ]: Analyzing trace with hash 33192570, now seen corresponding path program 1 times [2018-06-24 21:16:15,177 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:16:15,177 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:16:15,181 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:16:15,181 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:16:15,181 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:16:15,201 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:16:15,316 INFO ]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-24 21:16:15,316 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:16:15,316 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-06-24 21:16:15,324 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:16:15,367 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:16:15,375 INFO ]: Computing forward predicates... [2018-06-24 21:16:15,756 INFO ]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-24 21:16:15,776 INFO ]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-06-24 21:16:15,776 INFO ]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2018-06-24 21:16:15,776 INFO ]: Interpolant automaton has 11 states [2018-06-24 21:16:15,777 INFO ]: Constructing interpolant automaton starting with 11 interpolants. [2018-06-24 21:16:15,777 INFO ]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2018-06-24 21:16:15,777 INFO ]: Start difference. First operand 18 states and 26 transitions. Second operand 11 states. [2018-06-24 21:16:16,571 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:16:16,571 INFO ]: Finished difference Result 25 states and 36 transitions. [2018-06-24 21:16:16,572 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-24 21:16:16,572 INFO ]: Start accepts. Automaton has 11 states. Word has length 15 [2018-06-24 21:16:16,572 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:16:16,573 INFO ]: With dead ends: 25 [2018-06-24 21:16:16,573 INFO ]: Without dead ends: 25 [2018-06-24 21:16:16,573 INFO ]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2018-06-24 21:16:16,573 INFO ]: Start minimizeSevpa. Operand 25 states. [2018-06-24 21:16:16,577 INFO ]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-06-24 21:16:16,577 INFO ]: Start removeUnreachable. Operand 25 states. [2018-06-24 21:16:16,578 INFO ]: Finished removeUnreachable. Reduced from 25 states to 25 states and 36 transitions. [2018-06-24 21:16:16,578 INFO ]: Start accepts. Automaton has 25 states and 36 transitions. Word has length 15 [2018-06-24 21:16:16,578 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:16:16,578 INFO ]: Abstraction has 25 states and 36 transitions. [2018-06-24 21:16:16,578 INFO ]: Interpolant automaton has 11 states. [2018-06-24 21:16:16,578 INFO ]: Start isEmpty. Operand 25 states and 36 transitions. [2018-06-24 21:16:16,579 INFO ]: Finished isEmpty. Found accepting run of length 17 [2018-06-24 21:16:16,579 INFO ]: Found error trace [2018-06-24 21:16:16,579 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-24 21:16:16,579 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:16:16,580 INFO ]: Analyzing trace with hash 1028503697, now seen corresponding path program 1 times [2018-06-24 21:16:16,580 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:16:16,580 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:16:16,580 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:16:16,580 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:16:16,580 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:16:16,617 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:16:16,976 INFO ]: Checked inductivity of 8 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-24 21:16:16,976 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:16:16,976 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-06-24 21:16:16,985 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:16:17,003 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:16:17,006 INFO ]: Computing forward predicates... [2018-06-24 21:16:17,158 INFO ]: Checked inductivity of 8 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-24 21:16:17,180 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-24 21:16:17,180 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2018-06-24 21:16:17,180 INFO ]: Interpolant automaton has 14 states [2018-06-24 21:16:17,180 INFO ]: Constructing interpolant automaton starting with 14 interpolants. [2018-06-24 21:16:17,181 INFO ]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2018-06-24 21:16:17,181 INFO ]: Start difference. First operand 25 states and 36 transitions. Second operand 14 states. [2018-06-24 21:16:17,712 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:16:17,713 INFO ]: Finished difference Result 35 states and 51 transitions. [2018-06-24 21:16:17,713 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-06-24 21:16:17,713 INFO ]: Start accepts. Automaton has 14 states. Word has length 16 [2018-06-24 21:16:17,713 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:16:17,714 INFO ]: With dead ends: 35 [2018-06-24 21:16:17,714 INFO ]: Without dead ends: 35 [2018-06-24 21:16:17,715 INFO ]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2018-06-24 21:16:17,715 INFO ]: Start minimizeSevpa. Operand 35 states. [2018-06-24 21:16:17,721 INFO ]: Finished minimizeSevpa. Reduced states from 35 to 32. [2018-06-24 21:16:17,721 INFO ]: Start removeUnreachable. Operand 32 states. [2018-06-24 21:16:17,722 INFO ]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-06-24 21:16:17,722 INFO ]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 16 [2018-06-24 21:16:17,723 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:16:17,723 INFO ]: Abstraction has 32 states and 46 transitions. [2018-06-24 21:16:17,723 INFO ]: Interpolant automaton has 14 states. [2018-06-24 21:16:17,723 INFO ]: Start isEmpty. Operand 32 states and 46 transitions. [2018-06-24 21:16:17,724 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-24 21:16:17,724 INFO ]: Found error trace [2018-06-24 21:16:17,724 INFO ]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-24 21:16:17,724 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:16:17,724 INFO ]: Analyzing trace with hash 1818377562, now seen corresponding path program 2 times [2018-06-24 21:16:17,724 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:16:17,724 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:16:17,725 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:16:17,725 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:16:17,725 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:16:17,739 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:16:17,793 INFO ]: Checked inductivity of 10 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-24 21:16:17,793 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:16:17,793 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-06-24 21:16:17,800 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-24 21:16:17,820 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-24 21:16:17,820 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:16:17,822 INFO ]: Computing forward predicates... [2018-06-24 21:16:17,861 INFO ]: Checked inductivity of 10 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-24 21:16:17,880 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-24 21:16:17,880 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2018-06-24 21:16:17,881 INFO ]: Interpolant automaton has 11 states [2018-06-24 21:16:17,881 INFO ]: Constructing interpolant automaton starting with 11 interpolants. [2018-06-24 21:16:17,881 INFO ]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2018-06-24 21:16:17,881 INFO ]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-06-24 21:16:18,009 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:16:18,009 INFO ]: Finished difference Result 37 states and 53 transitions. [2018-06-24 21:16:18,009 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-06-24 21:16:18,009 INFO ]: Start accepts. Automaton has 11 states. Word has length 17 [2018-06-24 21:16:18,009 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:16:18,010 INFO ]: With dead ends: 37 [2018-06-24 21:16:18,010 INFO ]: Without dead ends: 29 [2018-06-24 21:16:18,010 INFO ]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2018-06-24 21:16:18,010 INFO ]: Start minimizeSevpa. Operand 29 states. [2018-06-24 21:16:18,015 INFO ]: Finished minimizeSevpa. Reduced states from 29 to 28. [2018-06-24 21:16:18,015 INFO ]: Start removeUnreachable. Operand 28 states. [2018-06-24 21:16:18,016 INFO ]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-06-24 21:16:18,016 INFO ]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-06-24 21:16:18,016 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:16:18,016 INFO ]: Abstraction has 28 states and 40 transitions. [2018-06-24 21:16:18,016 INFO ]: Interpolant automaton has 11 states. [2018-06-24 21:16:18,016 INFO ]: Start isEmpty. Operand 28 states and 40 transitions. [2018-06-24 21:16:18,017 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-24 21:16:18,017 INFO ]: Found error trace [2018-06-24 21:16:18,017 INFO ]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-24 21:16:18,017 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:16:18,018 INFO ]: Analyzing trace with hash -1672147077, now seen corresponding path program 3 times [2018-06-24 21:16:18,018 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:16:18,018 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:16:18,018 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:16:18,018 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-24 21:16:18,018 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:16:18,034 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:16:18,227 INFO ]: Checked inductivity of 18 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-06-24 21:16:18,227 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:16:18,227 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-06-24 21:16:18,245 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-24 21:16:18,267 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-24 21:16:18,267 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:16:18,269 INFO ]: Computing forward predicates... [2018-06-24 21:16:18,462 INFO ]: Checked inductivity of 18 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-24 21:16:18,481 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-24 21:16:18,481 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2018-06-24 21:16:18,481 INFO ]: Interpolant automaton has 17 states [2018-06-24 21:16:18,482 INFO ]: Constructing interpolant automaton starting with 17 interpolants. [2018-06-24 21:16:18,482 INFO ]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2018-06-24 21:16:18,483 INFO ]: Start difference. First operand 28 states and 40 transitions. Second operand 17 states. [2018-06-24 21:16:18,851 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:16:18,852 INFO ]: Finished difference Result 42 states and 61 transitions. [2018-06-24 21:16:18,852 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-06-24 21:16:18,852 INFO ]: Start accepts. Automaton has 17 states. Word has length 21 [2018-06-24 21:16:18,852 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:16:18,853 INFO ]: With dead ends: 42 [2018-06-24 21:16:18,853 INFO ]: Without dead ends: 42 [2018-06-24 21:16:18,854 INFO ]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2018-06-24 21:16:18,854 INFO ]: Start minimizeSevpa. Operand 42 states. [2018-06-24 21:16:18,859 INFO ]: Finished minimizeSevpa. Reduced states from 42 to 41. [2018-06-24 21:16:18,859 INFO ]: Start removeUnreachable. Operand 41 states. [2018-06-24 21:16:18,860 INFO ]: Finished removeUnreachable. Reduced from 41 states to 41 states and 58 transitions. [2018-06-24 21:16:18,860 INFO ]: Start accepts. Automaton has 41 states and 58 transitions. Word has length 21 [2018-06-24 21:16:18,860 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:16:18,860 INFO ]: Abstraction has 41 states and 58 transitions. [2018-06-24 21:16:18,861 INFO ]: Interpolant automaton has 17 states. [2018-06-24 21:16:18,861 INFO ]: Start isEmpty. Operand 41 states and 58 transitions. [2018-06-24 21:16:18,862 INFO ]: Finished isEmpty. Found accepting run of length 23 [2018-06-24 21:16:18,862 INFO ]: Found error trace [2018-06-24 21:16:18,862 INFO ]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-24 21:16:18,862 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:16:18,862 INFO ]: Analyzing trace with hash -297417808, now seen corresponding path program 4 times [2018-06-24 21:16:18,862 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:16:18,862 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:16:18,863 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:16:18,863 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-24 21:16:18,863 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:16:18,883 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:16:19,089 INFO ]: Checked inductivity of 20 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-24 21:16:19,089 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:16:19,089 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-06-24 21:16:19,094 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-24 21:16:19,134 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-24 21:16:19,134 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:16:19,137 INFO ]: Computing forward predicates... [2018-06-24 21:16:19,382 INFO ]: Checked inductivity of 20 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-06-24 21:16:19,401 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-24 21:16:19,401 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2018-06-24 21:16:19,401 INFO ]: Interpolant automaton has 17 states [2018-06-24 21:16:19,401 INFO ]: Constructing interpolant automaton starting with 17 interpolants. [2018-06-24 21:16:19,401 INFO ]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2018-06-24 21:16:19,402 INFO ]: Start difference. First operand 41 states and 58 transitions. Second operand 17 states. [2018-06-24 21:16:19,958 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:16:19,958 INFO ]: Finished difference Result 42 states and 59 transitions. [2018-06-24 21:16:19,958 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-06-24 21:16:19,958 INFO ]: Start accepts. Automaton has 17 states. Word has length 22 [2018-06-24 21:16:19,958 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:16:19,959 INFO ]: With dead ends: 42 [2018-06-24 21:16:19,959 INFO ]: Without dead ends: 42 [2018-06-24 21:16:19,960 INFO ]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2018-06-24 21:16:19,960 INFO ]: Start minimizeSevpa. Operand 42 states. [2018-06-24 21:16:19,965 INFO ]: Finished minimizeSevpa. Reduced states from 42 to 39. [2018-06-24 21:16:19,965 INFO ]: Start removeUnreachable. Operand 39 states. [2018-06-24 21:16:19,966 INFO ]: Finished removeUnreachable. Reduced from 39 states to 39 states and 54 transitions. [2018-06-24 21:16:19,966 INFO ]: Start accepts. Automaton has 39 states and 54 transitions. Word has length 22 [2018-06-24 21:16:19,966 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:16:19,966 INFO ]: Abstraction has 39 states and 54 transitions. [2018-06-24 21:16:19,966 INFO ]: Interpolant automaton has 17 states. [2018-06-24 21:16:19,966 INFO ]: Start isEmpty. Operand 39 states and 54 transitions. [2018-06-24 21:16:19,968 INFO ]: Finished isEmpty. Found accepting run of length 25 [2018-06-24 21:16:19,968 INFO ]: Found error trace [2018-06-24 21:16:19,968 INFO ]: trace histogram [4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-24 21:16:19,968 INFO ]: === Iteration 9 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:16:19,968 INFO ]: Analyzing trace with hash 1929384208, now seen corresponding path program 5 times [2018-06-24 21:16:19,968 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:16:19,968 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:16:19,969 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:16:19,969 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-24 21:16:19,969 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:16:19,983 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:16:20,064 INFO ]: Checked inductivity of 27 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-06-24 21:16:20,064 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:16:20,064 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-06-24 21:16:20,076 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-24 21:16:20,098 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-06-24 21:16:20,098 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:16:20,100 INFO ]: Computing forward predicates... [2018-06-24 21:16:20,131 INFO ]: Checked inductivity of 27 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-06-24 21:16:20,150 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-24 21:16:20,150 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2018-06-24 21:16:20,151 INFO ]: Interpolant automaton has 14 states [2018-06-24 21:16:20,151 INFO ]: Constructing interpolant automaton starting with 14 interpolants. [2018-06-24 21:16:20,151 INFO ]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2018-06-24 21:16:20,151 INFO ]: Start difference. First operand 39 states and 54 transitions. Second operand 14 states. [2018-06-24 21:16:20,316 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:16:20,316 INFO ]: Finished difference Result 46 states and 63 transitions. [2018-06-24 21:16:20,317 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-06-24 21:16:20,317 INFO ]: Start accepts. Automaton has 14 states. Word has length 24 [2018-06-24 21:16:20,317 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:16:20,318 INFO ]: With dead ends: 46 [2018-06-24 21:16:20,318 INFO ]: Without dead ends: 34 [2018-06-24 21:16:20,319 INFO ]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2018-06-24 21:16:20,319 INFO ]: Start minimizeSevpa. Operand 34 states. [2018-06-24 21:16:20,323 INFO ]: Finished minimizeSevpa. Reduced states from 34 to 33. [2018-06-24 21:16:20,323 INFO ]: Start removeUnreachable. Operand 33 states. [2018-06-24 21:16:20,324 INFO ]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2018-06-24 21:16:20,324 INFO ]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 24 [2018-06-24 21:16:20,324 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:16:20,324 INFO ]: Abstraction has 33 states and 46 transitions. [2018-06-24 21:16:20,324 INFO ]: Interpolant automaton has 14 states. [2018-06-24 21:16:20,324 INFO ]: Start isEmpty. Operand 33 states and 46 transitions. [2018-06-24 21:16:20,325 INFO ]: Finished isEmpty. Found accepting run of length 28 [2018-06-24 21:16:20,325 INFO ]: Found error trace [2018-06-24 21:16:20,325 INFO ]: trace histogram [4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-24 21:16:20,325 INFO ]: === Iteration 10 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:16:20,325 INFO ]: Analyzing trace with hash 80261564, now seen corresponding path program 6 times [2018-06-24 21:16:20,325 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:16:20,325 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:16:20,326 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:16:20,326 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-24 21:16:20,326 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:16:20,355 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:16:20,576 INFO ]: Checked inductivity of 35 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-06-24 21:16:20,576 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:16:20,576 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-06-24 21:16:20,583 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-24 21:16:20,635 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-06-24 21:16:20,635 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:16:20,639 INFO ]: Computing forward predicates... [2018-06-24 21:16:20,758 INFO ]: Checked inductivity of 35 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-06-24 21:16:20,787 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-24 21:16:20,787 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2018-06-24 21:16:20,788 INFO ]: Interpolant automaton has 20 states [2018-06-24 21:16:20,788 INFO ]: Constructing interpolant automaton starting with 20 interpolants. [2018-06-24 21:16:20,788 INFO ]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2018-06-24 21:16:20,788 INFO ]: Start difference. First operand 33 states and 46 transitions. Second operand 20 states. [2018-06-24 21:16:21,061 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:16:21,061 INFO ]: Finished difference Result 49 states and 69 transitions. [2018-06-24 21:16:21,061 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-06-24 21:16:21,061 INFO ]: Start accepts. Automaton has 20 states. Word has length 27 [2018-06-24 21:16:21,061 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:16:21,062 INFO ]: With dead ends: 49 [2018-06-24 21:16:21,062 INFO ]: Without dead ends: 49 [2018-06-24 21:16:21,063 INFO ]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=176, Invalid=946, Unknown=0, NotChecked=0, Total=1122 [2018-06-24 21:16:21,063 INFO ]: Start minimizeSevpa. Operand 49 states. [2018-06-24 21:16:21,070 INFO ]: Finished minimizeSevpa. Reduced states from 49 to 48. [2018-06-24 21:16:21,070 INFO ]: Start removeUnreachable. Operand 48 states. [2018-06-24 21:16:21,071 INFO ]: Finished removeUnreachable. Reduced from 48 states to 48 states and 66 transitions. [2018-06-24 21:16:21,071 INFO ]: Start accepts. Automaton has 48 states and 66 transitions. Word has length 27 [2018-06-24 21:16:21,072 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:16:21,072 INFO ]: Abstraction has 48 states and 66 transitions. [2018-06-24 21:16:21,072 INFO ]: Interpolant automaton has 20 states. [2018-06-24 21:16:21,072 INFO ]: Start isEmpty. Operand 48 states and 66 transitions. [2018-06-24 21:16:21,073 INFO ]: Finished isEmpty. Found accepting run of length 29 [2018-06-24 21:16:21,073 INFO ]: Found error trace [2018-06-24 21:16:21,073 INFO ]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-24 21:16:21,073 INFO ]: === Iteration 11 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:16:21,073 INFO ]: Analyzing trace with hash -1807324785, now seen corresponding path program 7 times [2018-06-24 21:16:21,073 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:16:21,073 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:16:21,074 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:16:21,074 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-24 21:16:21,074 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:16:21,088 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:16:21,266 INFO ]: Checked inductivity of 38 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-06-24 21:16:21,266 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:16:21,266 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-06-24 21:16:21,273 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:16:21,300 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:16:21,303 INFO ]: Computing forward predicates... [2018-06-24 21:16:21,419 INFO ]: Checked inductivity of 38 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-06-24 21:16:21,438 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-24 21:16:21,438 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 20 [2018-06-24 21:16:21,438 INFO ]: Interpolant automaton has 20 states [2018-06-24 21:16:21,438 INFO ]: Constructing interpolant automaton starting with 20 interpolants. [2018-06-24 21:16:21,439 INFO ]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2018-06-24 21:16:21,439 INFO ]: Start difference. First operand 48 states and 66 transitions. Second operand 20 states. [2018-06-24 21:16:22,135 WARN ]: Spent 231.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 21 [2018-06-24 21:16:22,386 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:16:22,386 INFO ]: Finished difference Result 49 states and 67 transitions. [2018-06-24 21:16:22,386 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-06-24 21:16:22,386 INFO ]: Start accepts. Automaton has 20 states. Word has length 28 [2018-06-24 21:16:22,386 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:16:22,387 INFO ]: With dead ends: 49 [2018-06-24 21:16:22,387 INFO ]: Without dead ends: 49 [2018-06-24 21:16:22,388 INFO ]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2018-06-24 21:16:22,388 INFO ]: Start minimizeSevpa. Operand 49 states. [2018-06-24 21:16:22,396 INFO ]: Finished minimizeSevpa. Reduced states from 49 to 44. [2018-06-24 21:16:22,396 INFO ]: Start removeUnreachable. Operand 44 states. [2018-06-24 21:16:22,396 INFO ]: Finished removeUnreachable. Reduced from 44 states to 44 states and 60 transitions. [2018-06-24 21:16:22,396 INFO ]: Start accepts. Automaton has 44 states and 60 transitions. Word has length 28 [2018-06-24 21:16:22,396 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:16:22,396 INFO ]: Abstraction has 44 states and 60 transitions. [2018-06-24 21:16:22,396 INFO ]: Interpolant automaton has 20 states. [2018-06-24 21:16:22,397 INFO ]: Start isEmpty. Operand 44 states and 60 transitions. [2018-06-24 21:16:22,397 INFO ]: Finished isEmpty. Found accepting run of length 31 [2018-06-24 21:16:22,397 INFO ]: Found error trace [2018-06-24 21:16:22,397 INFO ]: trace histogram [5, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-24 21:16:22,397 INFO ]: === Iteration 12 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:16:22,398 INFO ]: Analyzing trace with hash -1687241937, now seen corresponding path program 8 times [2018-06-24 21:16:22,398 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:16:22,398 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:16:22,398 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:16:22,398 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:16:22,398 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:16:22,414 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:16:22,695 INFO ]: Checked inductivity of 47 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-06-24 21:16:22,695 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:16:22,695 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-06-24 21:16:22,700 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-24 21:16:22,729 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-24 21:16:22,729 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:16:22,731 INFO ]: Computing forward predicates... [2018-06-24 21:16:22,767 INFO ]: Checked inductivity of 47 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-06-24 21:16:22,787 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-24 21:16:22,787 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2018-06-24 21:16:22,787 INFO ]: Interpolant automaton has 16 states [2018-06-24 21:16:22,787 INFO ]: Constructing interpolant automaton starting with 16 interpolants. [2018-06-24 21:16:22,787 INFO ]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2018-06-24 21:16:22,787 INFO ]: Start difference. First operand 44 states and 60 transitions. Second operand 16 states. [2018-06-24 21:16:22,913 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:16:22,913 INFO ]: Finished difference Result 53 states and 71 transitions. [2018-06-24 21:16:22,913 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-06-24 21:16:22,914 INFO ]: Start accepts. Automaton has 16 states. Word has length 30 [2018-06-24 21:16:22,914 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:16:22,914 INFO ]: With dead ends: 53 [2018-06-24 21:16:22,914 INFO ]: Without dead ends: 39 [2018-06-24 21:16:22,914 INFO ]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2018-06-24 21:16:22,914 INFO ]: Start minimizeSevpa. Operand 39 states. [2018-06-24 21:16:22,919 INFO ]: Finished minimizeSevpa. Reduced states from 39 to 38. [2018-06-24 21:16:22,919 INFO ]: Start removeUnreachable. Operand 38 states. [2018-06-24 21:16:22,919 INFO ]: Finished removeUnreachable. Reduced from 38 states to 38 states and 52 transitions. [2018-06-24 21:16:22,919 INFO ]: Start accepts. Automaton has 38 states and 52 transitions. Word has length 30 [2018-06-24 21:16:22,919 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:16:22,919 INFO ]: Abstraction has 38 states and 52 transitions. [2018-06-24 21:16:22,919 INFO ]: Interpolant automaton has 16 states. [2018-06-24 21:16:22,919 INFO ]: Start isEmpty. Operand 38 states and 52 transitions. [2018-06-24 21:16:22,920 INFO ]: Finished isEmpty. Found accepting run of length 34 [2018-06-24 21:16:22,920 INFO ]: Found error trace [2018-06-24 21:16:22,920 INFO ]: trace histogram [5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-24 21:16:22,920 INFO ]: === Iteration 13 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:16:22,920 INFO ]: Analyzing trace with hash 2010082365, now seen corresponding path program 9 times [2018-06-24 21:16:22,920 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:16:22,920 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:16:22,921 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:16:22,921 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-24 21:16:22,921 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:16:22,936 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:16:23,074 INFO ]: Checked inductivity of 58 backedges. 31 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-24 21:16:23,074 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:16:23,074 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-06-24 21:16:23,088 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-24 21:16:23,120 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-06-24 21:16:23,120 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:16:23,123 INFO ]: Computing forward predicates... [2018-06-24 21:16:23,282 INFO ]: Checked inductivity of 58 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-06-24 21:16:23,302 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-24 21:16:23,302 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2018-06-24 21:16:23,302 INFO ]: Interpolant automaton has 25 states [2018-06-24 21:16:23,302 INFO ]: Constructing interpolant automaton starting with 25 interpolants. [2018-06-24 21:16:23,302 INFO ]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2018-06-24 21:16:23,303 INFO ]: Start difference. First operand 38 states and 52 transitions. Second operand 25 states. [2018-06-24 21:16:23,771 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:16:23,771 INFO ]: Finished difference Result 56 states and 77 transitions. [2018-06-24 21:16:23,771 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-06-24 21:16:23,771 INFO ]: Start accepts. Automaton has 25 states. Word has length 33 [2018-06-24 21:16:23,771 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:16:23,772 INFO ]: With dead ends: 56 [2018-06-24 21:16:23,772 INFO ]: Without dead ends: 56 [2018-06-24 21:16:23,772 INFO ]: 0 DeclaredPredicates, 65 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=250, Invalid=1472, Unknown=0, NotChecked=0, Total=1722 [2018-06-24 21:16:23,773 INFO ]: Start minimizeSevpa. Operand 56 states. [2018-06-24 21:16:23,777 INFO ]: Finished minimizeSevpa. Reduced states from 56 to 55. [2018-06-24 21:16:23,777 INFO ]: Start removeUnreachable. Operand 55 states. [2018-06-24 21:16:23,778 INFO ]: Finished removeUnreachable. Reduced from 55 states to 55 states and 74 transitions. [2018-06-24 21:16:23,778 INFO ]: Start accepts. Automaton has 55 states and 74 transitions. Word has length 33 [2018-06-24 21:16:23,778 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:16:23,778 INFO ]: Abstraction has 55 states and 74 transitions. [2018-06-24 21:16:23,778 INFO ]: Interpolant automaton has 25 states. [2018-06-24 21:16:23,778 INFO ]: Start isEmpty. Operand 55 states and 74 transitions. [2018-06-24 21:16:23,779 INFO ]: Finished isEmpty. Found accepting run of length 35 [2018-06-24 21:16:23,779 INFO ]: Found error trace [2018-06-24 21:16:23,779 INFO ]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-24 21:16:23,779 INFO ]: === Iteration 14 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:16:23,780 INFO ]: Analyzing trace with hash -2112422098, now seen corresponding path program 10 times [2018-06-24 21:16:23,780 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:16:23,780 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:16:23,780 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:16:23,780 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-24 21:16:23,780 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:16:23,802 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:16:24,739 INFO ]: Checked inductivity of 62 backedges. 8 proven. 36 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-06-24 21:16:24,739 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:16:24,739 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-06-24 21:16:24,745 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-24 21:16:24,772 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-24 21:16:24,772 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:16:24,775 INFO ]: Computing forward predicates... [2018-06-24 21:16:25,023 INFO ]: Checked inductivity of 62 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-24 21:16:25,042 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-24 21:16:25,043 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 23 [2018-06-24 21:16:25,043 INFO ]: Interpolant automaton has 23 states [2018-06-24 21:16:25,043 INFO ]: Constructing interpolant automaton starting with 23 interpolants. [2018-06-24 21:16:25,043 INFO ]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2018-06-24 21:16:25,043 INFO ]: Start difference. First operand 55 states and 74 transitions. Second operand 23 states. [2018-06-24 21:16:25,721 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:16:25,722 INFO ]: Finished difference Result 56 states and 75 transitions. [2018-06-24 21:16:25,722 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-06-24 21:16:25,722 INFO ]: Start accepts. Automaton has 23 states. Word has length 34 [2018-06-24 21:16:25,722 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:16:25,723 INFO ]: With dead ends: 56 [2018-06-24 21:16:25,723 INFO ]: Without dead ends: 56 [2018-06-24 21:16:25,724 INFO ]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=169, Invalid=1237, Unknown=0, NotChecked=0, Total=1406 [2018-06-24 21:16:25,724 INFO ]: Start minimizeSevpa. Operand 56 states. [2018-06-24 21:16:25,729 INFO ]: Finished minimizeSevpa. Reduced states from 56 to 49. [2018-06-24 21:16:25,729 INFO ]: Start removeUnreachable. Operand 49 states. [2018-06-24 21:16:25,730 INFO ]: Finished removeUnreachable. Reduced from 49 states to 49 states and 66 transitions. [2018-06-24 21:16:25,730 INFO ]: Start accepts. Automaton has 49 states and 66 transitions. Word has length 34 [2018-06-24 21:16:25,730 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:16:25,730 INFO ]: Abstraction has 49 states and 66 transitions. [2018-06-24 21:16:25,730 INFO ]: Interpolant automaton has 23 states. [2018-06-24 21:16:25,730 INFO ]: Start isEmpty. Operand 49 states and 66 transitions. [2018-06-24 21:16:25,732 INFO ]: Finished isEmpty. Found accepting run of length 37 [2018-06-24 21:16:25,732 INFO ]: Found error trace [2018-06-24 21:16:25,732 INFO ]: trace histogram [6, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-24 21:16:25,732 INFO ]: === Iteration 15 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:16:25,732 INFO ]: Analyzing trace with hash 1466983694, now seen corresponding path program 11 times [2018-06-24 21:16:25,732 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:16:25,732 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:16:25,733 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:16:25,733 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-24 21:16:25,733 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:16:25,753 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:16:26,094 INFO ]: Checked inductivity of 73 backedges. 15 proven. 37 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-24 21:16:26,094 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:16:26,094 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-06-24 21:16:26,100 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-24 21:16:26,135 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-06-24 21:16:26,135 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:16:26,139 INFO ]: Computing forward predicates... [2018-06-24 21:16:26,186 INFO ]: Checked inductivity of 73 backedges. 26 proven. 26 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-24 21:16:26,205 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-24 21:16:26,205 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2018-06-24 21:16:26,205 INFO ]: Interpolant automaton has 18 states [2018-06-24 21:16:26,205 INFO ]: Constructing interpolant automaton starting with 18 interpolants. [2018-06-24 21:16:26,206 INFO ]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2018-06-24 21:16:26,206 INFO ]: Start difference. First operand 49 states and 66 transitions. Second operand 18 states. [2018-06-24 21:16:26,375 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:16:26,375 INFO ]: Finished difference Result 60 states and 79 transitions. [2018-06-24 21:16:26,375 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-06-24 21:16:26,375 INFO ]: Start accepts. Automaton has 18 states. Word has length 36 [2018-06-24 21:16:26,375 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:16:26,376 INFO ]: With dead ends: 60 [2018-06-24 21:16:26,376 INFO ]: Without dead ends: 44 [2018-06-24 21:16:26,376 INFO ]: 0 DeclaredPredicates, 65 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=187, Invalid=625, Unknown=0, NotChecked=0, Total=812 [2018-06-24 21:16:26,376 INFO ]: Start minimizeSevpa. Operand 44 states. [2018-06-24 21:16:26,381 INFO ]: Finished minimizeSevpa. Reduced states from 44 to 43. [2018-06-24 21:16:26,381 INFO ]: Start removeUnreachable. Operand 43 states. [2018-06-24 21:16:26,382 INFO ]: Finished removeUnreachable. Reduced from 43 states to 43 states and 58 transitions. [2018-06-24 21:16:26,382 INFO ]: Start accepts. Automaton has 43 states and 58 transitions. Word has length 36 [2018-06-24 21:16:26,382 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:16:26,382 INFO ]: Abstraction has 43 states and 58 transitions. [2018-06-24 21:16:26,382 INFO ]: Interpolant automaton has 18 states. [2018-06-24 21:16:26,382 INFO ]: Start isEmpty. Operand 43 states and 58 transitions. [2018-06-24 21:16:26,383 INFO ]: Finished isEmpty. Found accepting run of length 40 [2018-06-24 21:16:26,383 INFO ]: Found error trace [2018-06-24 21:16:26,383 INFO ]: trace histogram [6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-24 21:16:26,383 INFO ]: === Iteration 16 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:16:26,383 INFO ]: Analyzing trace with hash -1011551234, now seen corresponding path program 12 times [2018-06-24 21:16:26,383 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:16:26,383 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:16:26,384 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:16:26,384 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-24 21:16:26,384 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:16:26,396 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:16:26,766 INFO ]: Checked inductivity of 87 backedges. 46 proven. 10 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2018-06-24 21:16:26,766 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:16:26,766 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-06-24 21:16:26,772 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-24 21:16:26,806 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-06-24 21:16:26,806 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:16:26,810 INFO ]: Computing forward predicates... [2018-06-24 21:16:26,991 INFO ]: Checked inductivity of 87 backedges. 10 proven. 50 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-06-24 21:16:27,022 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-24 21:16:27,022 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2018-06-24 21:16:27,022 INFO ]: Interpolant automaton has 29 states [2018-06-24 21:16:27,022 INFO ]: Constructing interpolant automaton starting with 29 interpolants. [2018-06-24 21:16:27,023 INFO ]: CoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2018-06-24 21:16:27,023 INFO ]: Start difference. First operand 43 states and 58 transitions. Second operand 29 states. [2018-06-24 21:16:27,486 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:16:27,486 INFO ]: Finished difference Result 63 states and 85 transitions. [2018-06-24 21:16:27,486 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-06-24 21:16:27,486 INFO ]: Start accepts. Automaton has 29 states. Word has length 39 [2018-06-24 21:16:27,487 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:16:27,487 INFO ]: With dead ends: 63 [2018-06-24 21:16:27,487 INFO ]: Without dead ends: 63 [2018-06-24 21:16:27,488 INFO ]: 0 DeclaredPredicates, 77 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=325, Invalid=2027, Unknown=0, NotChecked=0, Total=2352 [2018-06-24 21:16:27,488 INFO ]: Start minimizeSevpa. Operand 63 states. [2018-06-24 21:16:27,492 INFO ]: Finished minimizeSevpa. Reduced states from 63 to 62. [2018-06-24 21:16:27,492 INFO ]: Start removeUnreachable. Operand 62 states. [2018-06-24 21:16:27,493 INFO ]: Finished removeUnreachable. Reduced from 62 states to 62 states and 82 transitions. [2018-06-24 21:16:27,493 INFO ]: Start accepts. Automaton has 62 states and 82 transitions. Word has length 39 [2018-06-24 21:16:27,493 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:16:27,493 INFO ]: Abstraction has 62 states and 82 transitions. [2018-06-24 21:16:27,493 INFO ]: Interpolant automaton has 29 states. [2018-06-24 21:16:27,493 INFO ]: Start isEmpty. Operand 62 states and 82 transitions. [2018-06-24 21:16:27,494 INFO ]: Finished isEmpty. Found accepting run of length 41 [2018-06-24 21:16:27,494 INFO ]: Found error trace [2018-06-24 21:16:27,494 INFO ]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-24 21:16:27,494 INFO ]: === Iteration 17 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:16:27,494 INFO ]: Analyzing trace with hash -1293783155, now seen corresponding path program 13 times [2018-06-24 21:16:27,494 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:16:27,494 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:16:27,494 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:16:27,494 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-24 21:16:27,494 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:16:27,510 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:16:27,826 INFO ]: Checked inductivity of 92 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-06-24 21:16:27,826 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:16:27,826 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-06-24 21:16:27,832 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:16:27,862 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:16:27,874 INFO ]: Computing forward predicates... [2018-06-24 21:16:28,080 INFO ]: Checked inductivity of 92 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2018-06-24 21:16:28,099 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-24 21:16:28,099 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 26 [2018-06-24 21:16:28,099 INFO ]: Interpolant automaton has 26 states [2018-06-24 21:16:28,100 INFO ]: Constructing interpolant automaton starting with 26 interpolants. [2018-06-24 21:16:28,100 INFO ]: CoverageRelationStatistics Valid=58, Invalid=592, Unknown=0, NotChecked=0, Total=650 [2018-06-24 21:16:28,100 INFO ]: Start difference. First operand 62 states and 82 transitions. Second operand 26 states. [2018-06-24 21:16:28,849 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:16:28,849 INFO ]: Finished difference Result 63 states and 83 transitions. [2018-06-24 21:16:28,883 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-06-24 21:16:28,883 INFO ]: Start accepts. Automaton has 26 states. Word has length 40 [2018-06-24 21:16:28,884 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:16:28,884 INFO ]: With dead ends: 63 [2018-06-24 21:16:28,884 INFO ]: Without dead ends: 63 [2018-06-24 21:16:28,885 INFO ]: 0 DeclaredPredicates, 78 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=194, Invalid=1612, Unknown=0, NotChecked=0, Total=1806 [2018-06-24 21:16:28,885 INFO ]: Start minimizeSevpa. Operand 63 states. [2018-06-24 21:16:28,889 INFO ]: Finished minimizeSevpa. Reduced states from 63 to 54. [2018-06-24 21:16:28,889 INFO ]: Start removeUnreachable. Operand 54 states. [2018-06-24 21:16:28,890 INFO ]: Finished removeUnreachable. Reduced from 54 states to 54 states and 72 transitions. [2018-06-24 21:16:28,890 INFO ]: Start accepts. Automaton has 54 states and 72 transitions. Word has length 40 [2018-06-24 21:16:28,890 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:16:28,890 INFO ]: Abstraction has 54 states and 72 transitions. [2018-06-24 21:16:28,890 INFO ]: Interpolant automaton has 26 states. [2018-06-24 21:16:28,890 INFO ]: Start isEmpty. Operand 54 states and 72 transitions. [2018-06-24 21:16:28,891 INFO ]: Finished isEmpty. Found accepting run of length 43 [2018-06-24 21:16:28,891 INFO ]: Found error trace [2018-06-24 21:16:28,891 INFO ]: trace histogram [7, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-24 21:16:28,891 INFO ]: === Iteration 18 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:16:28,891 INFO ]: Analyzing trace with hash -2094974547, now seen corresponding path program 14 times [2018-06-24 21:16:28,891 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:16:28,891 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:16:28,892 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:16:28,892 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:16:28,892 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:16:28,904 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:16:29,037 INFO ]: Checked inductivity of 105 backedges. 21 proven. 53 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2018-06-24 21:16:29,037 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:16:29,037 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-06-24 21:16:29,047 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-24 21:16:29,080 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-24 21:16:29,080 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:16:29,082 INFO ]: Computing forward predicates... [2018-06-24 21:16:29,128 INFO ]: Checked inductivity of 105 backedges. 34 proven. 40 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2018-06-24 21:16:29,147 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-24 21:16:29,147 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2018-06-24 21:16:29,147 INFO ]: Interpolant automaton has 20 states [2018-06-24 21:16:29,147 INFO ]: Constructing interpolant automaton starting with 20 interpolants. [2018-06-24 21:16:29,147 INFO ]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2018-06-24 21:16:29,148 INFO ]: Start difference. First operand 54 states and 72 transitions. Second operand 20 states. [2018-06-24 21:16:29,326 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:16:29,327 INFO ]: Finished difference Result 67 states and 87 transitions. [2018-06-24 21:16:29,327 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-06-24 21:16:29,327 INFO ]: Start accepts. Automaton has 20 states. Word has length 42 [2018-06-24 21:16:29,327 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:16:29,327 INFO ]: With dead ends: 67 [2018-06-24 21:16:29,327 INFO ]: Without dead ends: 49 [2018-06-24 21:16:29,328 INFO ]: 0 DeclaredPredicates, 76 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=243, Invalid=813, Unknown=0, NotChecked=0, Total=1056 [2018-06-24 21:16:29,328 INFO ]: Start minimizeSevpa. Operand 49 states. [2018-06-24 21:16:29,332 INFO ]: Finished minimizeSevpa. Reduced states from 49 to 48. [2018-06-24 21:16:29,332 INFO ]: Start removeUnreachable. Operand 48 states. [2018-06-24 21:16:29,332 INFO ]: Finished removeUnreachable. Reduced from 48 states to 48 states and 64 transitions. [2018-06-24 21:16:29,332 INFO ]: Start accepts. Automaton has 48 states and 64 transitions. Word has length 42 [2018-06-24 21:16:29,333 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:16:29,333 INFO ]: Abstraction has 48 states and 64 transitions. [2018-06-24 21:16:29,333 INFO ]: Interpolant automaton has 20 states. [2018-06-24 21:16:29,333 INFO ]: Start isEmpty. Operand 48 states and 64 transitions. [2018-06-24 21:16:29,333 INFO ]: Finished isEmpty. Found accepting run of length 46 [2018-06-24 21:16:29,333 INFO ]: Found error trace [2018-06-24 21:16:29,333 INFO ]: trace histogram [7, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-24 21:16:29,333 INFO ]: === Iteration 19 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:16:29,334 INFO ]: Analyzing trace with hash -769616897, now seen corresponding path program 15 times [2018-06-24 21:16:29,334 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:16:29,334 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:16:29,334 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:16:29,334 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-24 21:16:29,334 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:16:29,352 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:16:29,750 INFO ]: Checked inductivity of 122 backedges. 64 proven. 15 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2018-06-24 21:16:29,750 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:16:29,750 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-06-24 21:16:29,761 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-24 21:16:29,802 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-06-24 21:16:29,802 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:16:29,806 INFO ]: Computing forward predicates... [2018-06-24 21:16:30,008 INFO ]: Checked inductivity of 122 backedges. 12 proven. 72 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2018-06-24 21:16:30,028 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-24 21:16:30,028 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 33 [2018-06-24 21:16:30,029 INFO ]: Interpolant automaton has 33 states [2018-06-24 21:16:30,029 INFO ]: Constructing interpolant automaton starting with 33 interpolants. [2018-06-24 21:16:30,029 INFO ]: CoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2018-06-24 21:16:30,029 INFO ]: Start difference. First operand 48 states and 64 transitions. Second operand 33 states. [2018-06-24 21:16:30,789 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:16:30,789 INFO ]: Finished difference Result 70 states and 93 transitions. [2018-06-24 21:16:30,789 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-06-24 21:16:30,790 INFO ]: Start accepts. Automaton has 33 states. Word has length 45 [2018-06-24 21:16:30,790 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:16:30,790 INFO ]: With dead ends: 70 [2018-06-24 21:16:30,790 INFO ]: Without dead ends: 70 [2018-06-24 21:16:30,791 INFO ]: 0 DeclaredPredicates, 89 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 918 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=409, Invalid=2671, Unknown=0, NotChecked=0, Total=3080 [2018-06-24 21:16:30,791 INFO ]: Start minimizeSevpa. Operand 70 states. [2018-06-24 21:16:30,795 INFO ]: Finished minimizeSevpa. Reduced states from 70 to 69. [2018-06-24 21:16:30,795 INFO ]: Start removeUnreachable. Operand 69 states. [2018-06-24 21:16:30,796 INFO ]: Finished removeUnreachable. Reduced from 69 states to 69 states and 90 transitions. [2018-06-24 21:16:30,796 INFO ]: Start accepts. Automaton has 69 states and 90 transitions. Word has length 45 [2018-06-24 21:16:30,796 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:16:30,796 INFO ]: Abstraction has 69 states and 90 transitions. [2018-06-24 21:16:30,796 INFO ]: Interpolant automaton has 33 states. [2018-06-24 21:16:30,796 INFO ]: Start isEmpty. Operand 69 states and 90 transitions. [2018-06-24 21:16:30,797 INFO ]: Finished isEmpty. Found accepting run of length 47 [2018-06-24 21:16:30,797 INFO ]: Found error trace [2018-06-24 21:16:30,797 INFO ]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-24 21:16:30,797 INFO ]: === Iteration 20 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:16:30,797 INFO ]: Analyzing trace with hash 1911213996, now seen corresponding path program 16 times [2018-06-24 21:16:30,797 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:16:30,797 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:16:30,798 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:16:30,798 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-24 21:16:30,798 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:16:30,812 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:16:31,115 INFO ]: Checked inductivity of 128 backedges. 12 proven. 78 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2018-06-24 21:16:31,115 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:16:31,115 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-06-24 21:16:31,121 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-24 21:16:31,157 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-24 21:16:31,157 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:16:31,160 INFO ]: Computing forward predicates... [2018-06-24 21:16:31,370 INFO ]: Checked inductivity of 128 backedges. 7 proven. 78 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2018-06-24 21:16:31,389 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-24 21:16:31,389 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 29 [2018-06-24 21:16:31,389 INFO ]: Interpolant automaton has 29 states [2018-06-24 21:16:31,389 INFO ]: Constructing interpolant automaton starting with 29 interpolants. [2018-06-24 21:16:31,390 INFO ]: CoverageRelationStatistics Valid=65, Invalid=747, Unknown=0, NotChecked=0, Total=812 [2018-06-24 21:16:31,390 INFO ]: Start difference. First operand 69 states and 90 transitions. Second operand 29 states. [2018-06-24 21:16:32,437 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:16:32,437 INFO ]: Finished difference Result 70 states and 91 transitions. [2018-06-24 21:16:32,438 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-06-24 21:16:32,438 INFO ]: Start accepts. Automaton has 29 states. Word has length 46 [2018-06-24 21:16:32,438 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:16:32,438 INFO ]: With dead ends: 70 [2018-06-24 21:16:32,438 INFO ]: Without dead ends: 70 [2018-06-24 21:16:32,439 INFO ]: 0 DeclaredPredicates, 89 GetRequests, 36 SyntacticMatches, 7 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=219, Invalid=2037, Unknown=0, NotChecked=0, Total=2256 [2018-06-24 21:16:32,439 INFO ]: Start minimizeSevpa. Operand 70 states. [2018-06-24 21:16:32,443 INFO ]: Finished minimizeSevpa. Reduced states from 70 to 59. [2018-06-24 21:16:32,443 INFO ]: Start removeUnreachable. Operand 59 states. [2018-06-24 21:16:32,447 INFO ]: Finished removeUnreachable. Reduced from 59 states to 59 states and 78 transitions. [2018-06-24 21:16:32,447 INFO ]: Start accepts. Automaton has 59 states and 78 transitions. Word has length 46 [2018-06-24 21:16:32,447 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:16:32,447 INFO ]: Abstraction has 59 states and 78 transitions. [2018-06-24 21:16:32,447 INFO ]: Interpolant automaton has 29 states. [2018-06-24 21:16:32,447 INFO ]: Start isEmpty. Operand 59 states and 78 transitions. [2018-06-24 21:16:32,448 INFO ]: Finished isEmpty. Found accepting run of length 49 [2018-06-24 21:16:32,448 INFO ]: Found error trace [2018-06-24 21:16:32,448 INFO ]: trace histogram [8, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-24 21:16:32,448 INFO ]: === Iteration 21 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:16:32,448 INFO ]: Analyzing trace with hash -1584263668, now seen corresponding path program 17 times [2018-06-24 21:16:32,448 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:16:32,448 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:16:32,449 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:16:32,449 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-24 21:16:32,449 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:16:32,464 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:16:33,344 INFO ]: Checked inductivity of 143 backedges. 28 proven. 72 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2018-06-24 21:16:33,344 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:16:33,344 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-06-24 21:16:33,354 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-24 21:16:33,397 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-06-24 21:16:33,397 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:16:33,400 INFO ]: Computing forward predicates... [2018-06-24 21:16:33,553 INFO ]: Checked inductivity of 143 backedges. 43 proven. 57 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2018-06-24 21:16:33,573 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-24 21:16:33,573 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2018-06-24 21:16:33,573 INFO ]: Interpolant automaton has 22 states [2018-06-24 21:16:33,573 INFO ]: Constructing interpolant automaton starting with 22 interpolants. [2018-06-24 21:16:33,573 INFO ]: CoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2018-06-24 21:16:33,573 INFO ]: Start difference. First operand 59 states and 78 transitions. Second operand 22 states. [2018-06-24 21:16:33,758 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:16:33,758 INFO ]: Finished difference Result 74 states and 95 transitions. [2018-06-24 21:16:33,760 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-06-24 21:16:33,760 INFO ]: Start accepts. Automaton has 22 states. Word has length 48 [2018-06-24 21:16:33,760 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:16:33,760 INFO ]: With dead ends: 74 [2018-06-24 21:16:33,760 INFO ]: Without dead ends: 54 [2018-06-24 21:16:33,761 INFO ]: 0 DeclaredPredicates, 87 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=307, Invalid=1025, Unknown=0, NotChecked=0, Total=1332 [2018-06-24 21:16:33,761 INFO ]: Start minimizeSevpa. Operand 54 states. [2018-06-24 21:16:33,764 INFO ]: Finished minimizeSevpa. Reduced states from 54 to 53. [2018-06-24 21:16:33,764 INFO ]: Start removeUnreachable. Operand 53 states. [2018-06-24 21:16:33,765 INFO ]: Finished removeUnreachable. Reduced from 53 states to 53 states and 70 transitions. [2018-06-24 21:16:33,765 INFO ]: Start accepts. Automaton has 53 states and 70 transitions. Word has length 48 [2018-06-24 21:16:33,765 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:16:33,765 INFO ]: Abstraction has 53 states and 70 transitions. [2018-06-24 21:16:33,765 INFO ]: Interpolant automaton has 22 states. [2018-06-24 21:16:33,765 INFO ]: Start isEmpty. Operand 53 states and 70 transitions. [2018-06-24 21:16:33,766 INFO ]: Finished isEmpty. Found accepting run of length 52 [2018-06-24 21:16:33,766 INFO ]: Found error trace [2018-06-24 21:16:33,766 INFO ]: trace histogram [8, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-24 21:16:33,766 INFO ]: === Iteration 22 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:16:33,766 INFO ]: Analyzing trace with hash 1439220032, now seen corresponding path program 18 times [2018-06-24 21:16:33,766 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:16:33,766 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:16:33,767 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:16:33,767 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-24 21:16:33,767 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:16:33,782 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:16:34,295 INFO ]: Checked inductivity of 163 backedges. 85 proven. 21 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-06-24 21:16:34,295 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:16:34,295 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-06-24 21:16:34,304 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-24 21:16:34,353 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-06-24 21:16:34,353 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:16:34,357 INFO ]: Computing forward predicates... [2018-06-24 21:16:34,638 INFO ]: Checked inductivity of 163 backedges. 14 proven. 98 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2018-06-24 21:16:34,658 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-24 21:16:34,658 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 37 [2018-06-24 21:16:34,658 INFO ]: Interpolant automaton has 37 states [2018-06-24 21:16:34,659 INFO ]: Constructing interpolant automaton starting with 37 interpolants. [2018-06-24 21:16:34,659 INFO ]: CoverageRelationStatistics Valid=187, Invalid=1145, Unknown=0, NotChecked=0, Total=1332 [2018-06-24 21:16:34,659 INFO ]: Start difference. First operand 53 states and 70 transitions. Second operand 37 states. [2018-06-24 21:16:35,643 WARN ]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-06-24 21:16:35,863 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:16:35,863 INFO ]: Finished difference Result 77 states and 101 transitions. [2018-06-24 21:16:35,865 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-06-24 21:16:35,865 INFO ]: Start accepts. Automaton has 37 states. Word has length 51 [2018-06-24 21:16:35,865 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:16:35,866 INFO ]: With dead ends: 77 [2018-06-24 21:16:35,866 INFO ]: Without dead ends: 77 [2018-06-24 21:16:35,867 INFO ]: 0 DeclaredPredicates, 101 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1195 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=502, Invalid=3404, Unknown=0, NotChecked=0, Total=3906 [2018-06-24 21:16:35,867 INFO ]: Start minimizeSevpa. Operand 77 states. [2018-06-24 21:16:35,870 INFO ]: Finished minimizeSevpa. Reduced states from 77 to 76. [2018-06-24 21:16:35,870 INFO ]: Start removeUnreachable. Operand 76 states. [2018-06-24 21:16:35,870 INFO ]: Finished removeUnreachable. Reduced from 76 states to 76 states and 98 transitions. [2018-06-24 21:16:35,870 INFO ]: Start accepts. Automaton has 76 states and 98 transitions. Word has length 51 [2018-06-24 21:16:35,871 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:16:35,871 INFO ]: Abstraction has 76 states and 98 transitions. [2018-06-24 21:16:35,871 INFO ]: Interpolant automaton has 37 states. [2018-06-24 21:16:35,871 INFO ]: Start isEmpty. Operand 76 states and 98 transitions. [2018-06-24 21:16:35,872 INFO ]: Finished isEmpty. Found accepting run of length 53 [2018-06-24 21:16:35,872 INFO ]: Found error trace [2018-06-24 21:16:35,872 INFO ]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-24 21:16:35,872 INFO ]: === Iteration 23 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:16:35,872 INFO ]: Analyzing trace with hash 1665682059, now seen corresponding path program 19 times [2018-06-24 21:16:35,872 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:16:35,872 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:16:35,872 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:16:35,872 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-24 21:16:35,872 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:16:35,889 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:16:36,168 WARN ]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-06-24 21:16:36,654 INFO ]: Checked inductivity of 170 backedges. 14 proven. 105 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2018-06-24 21:16:36,654 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:16:36,654 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-06-24 21:16:36,665 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:16:36,712 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:16:36,716 INFO ]: Computing forward predicates... [2018-06-24 21:16:36,957 INFO ]: Checked inductivity of 170 backedges. 8 proven. 105 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-06-24 21:16:36,976 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-24 21:16:36,977 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 32 [2018-06-24 21:16:36,977 INFO ]: Interpolant automaton has 32 states [2018-06-24 21:16:36,977 INFO ]: Constructing interpolant automaton starting with 32 interpolants. [2018-06-24 21:16:36,977 INFO ]: CoverageRelationStatistics Valid=72, Invalid=920, Unknown=0, NotChecked=0, Total=992 [2018-06-24 21:16:36,977 INFO ]: Start difference. First operand 76 states and 98 transitions. Second operand 32 states. [2018-06-24 21:16:37,977 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:16:37,977 INFO ]: Finished difference Result 77 states and 99 transitions. [2018-06-24 21:16:37,977 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-06-24 21:16:37,977 INFO ]: Start accepts. Automaton has 32 states. Word has length 52 [2018-06-24 21:16:37,977 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:16:37,978 INFO ]: With dead ends: 77 [2018-06-24 21:16:37,978 INFO ]: Without dead ends: 77 [2018-06-24 21:16:37,979 INFO ]: 0 DeclaredPredicates, 100 GetRequests, 41 SyntacticMatches, 8 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=244, Invalid=2512, Unknown=0, NotChecked=0, Total=2756 [2018-06-24 21:16:37,979 INFO ]: Start minimizeSevpa. Operand 77 states. [2018-06-24 21:16:37,983 INFO ]: Finished minimizeSevpa. Reduced states from 77 to 64. [2018-06-24 21:16:37,983 INFO ]: Start removeUnreachable. Operand 64 states. [2018-06-24 21:16:37,983 INFO ]: Finished removeUnreachable. Reduced from 64 states to 64 states and 84 transitions. [2018-06-24 21:16:37,983 INFO ]: Start accepts. Automaton has 64 states and 84 transitions. Word has length 52 [2018-06-24 21:16:37,983 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:16:37,983 INFO ]: Abstraction has 64 states and 84 transitions. [2018-06-24 21:16:37,983 INFO ]: Interpolant automaton has 32 states. [2018-06-24 21:16:37,984 INFO ]: Start isEmpty. Operand 64 states and 84 transitions. [2018-06-24 21:16:37,984 INFO ]: Finished isEmpty. Found accepting run of length 55 [2018-06-24 21:16:37,984 INFO ]: Found error trace [2018-06-24 21:16:37,984 INFO ]: trace histogram [9, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-24 21:16:37,984 INFO ]: === Iteration 24 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:16:37,984 INFO ]: Analyzing trace with hash -1317253845, now seen corresponding path program 20 times [2018-06-24 21:16:37,984 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:16:37,984 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:16:37,986 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:16:37,986 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:16:37,986 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:16:38,000 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:16:38,824 INFO ]: Checked inductivity of 187 backedges. 36 proven. 94 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-06-24 21:16:38,824 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:16:38,824 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-06-24 21:16:38,830 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-24 21:16:38,875 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-24 21:16:38,875 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:16:38,878 INFO ]: Computing forward predicates... [2018-06-24 21:16:38,924 INFO ]: Checked inductivity of 187 backedges. 53 proven. 77 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-06-24 21:16:38,943 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-24 21:16:38,943 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2018-06-24 21:16:38,943 INFO ]: Interpolant automaton has 24 states [2018-06-24 21:16:38,943 INFO ]: Constructing interpolant automaton starting with 24 interpolants. [2018-06-24 21:16:38,943 INFO ]: CoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2018-06-24 21:16:38,944 INFO ]: Start difference. First operand 64 states and 84 transitions. Second operand 24 states. [2018-06-24 21:16:39,568 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:16:39,568 INFO ]: Finished difference Result 81 states and 103 transitions. [2018-06-24 21:16:39,569 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-06-24 21:16:39,569 INFO ]: Start accepts. Automaton has 24 states. Word has length 54 [2018-06-24 21:16:39,569 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:16:39,569 INFO ]: With dead ends: 81 [2018-06-24 21:16:39,569 INFO ]: Without dead ends: 59 [2018-06-24 21:16:39,570 INFO ]: 0 DeclaredPredicates, 98 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=379, Invalid=1261, Unknown=0, NotChecked=0, Total=1640 [2018-06-24 21:16:39,570 INFO ]: Start minimizeSevpa. Operand 59 states. [2018-06-24 21:16:39,572 INFO ]: Finished minimizeSevpa. Reduced states from 59 to 58. [2018-06-24 21:16:39,572 INFO ]: Start removeUnreachable. Operand 58 states. [2018-06-24 21:16:39,573 INFO ]: Finished removeUnreachable. Reduced from 58 states to 58 states and 76 transitions. [2018-06-24 21:16:39,573 INFO ]: Start accepts. Automaton has 58 states and 76 transitions. Word has length 54 [2018-06-24 21:16:39,573 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:16:39,573 INFO ]: Abstraction has 58 states and 76 transitions. [2018-06-24 21:16:39,573 INFO ]: Interpolant automaton has 24 states. [2018-06-24 21:16:39,573 INFO ]: Start isEmpty. Operand 58 states and 76 transitions. [2018-06-24 21:16:39,574 INFO ]: Finished isEmpty. Found accepting run of length 58 [2018-06-24 21:16:39,574 INFO ]: Found error trace [2018-06-24 21:16:39,574 INFO ]: trace histogram [9, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-24 21:16:39,574 INFO ]: === Iteration 25 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:16:39,574 INFO ]: Analyzing trace with hash 1496450753, now seen corresponding path program 21 times [2018-06-24 21:16:39,574 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:16:39,574 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:16:39,576 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:16:39,576 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-24 21:16:39,576 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:16:39,593 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:16:39,946 INFO ]: Checked inductivity of 210 backedges. 109 proven. 28 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2018-06-24 21:16:39,946 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:16:39,946 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-06-24 21:16:39,952 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-24 21:16:40,006 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-06-24 21:16:40,006 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:16:40,009 INFO ]: Computing forward predicates... [2018-06-24 21:16:40,424 INFO ]: Checked inductivity of 210 backedges. 16 proven. 128 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2018-06-24 21:16:40,443 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-24 21:16:40,443 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 41 [2018-06-24 21:16:40,443 INFO ]: Interpolant automaton has 41 states [2018-06-24 21:16:40,443 INFO ]: Constructing interpolant automaton starting with 41 interpolants. [2018-06-24 21:16:40,444 INFO ]: CoverageRelationStatistics Valid=227, Invalid=1413, Unknown=0, NotChecked=0, Total=1640 [2018-06-24 21:16:40,444 INFO ]: Start difference. First operand 58 states and 76 transitions. Second operand 41 states. [2018-06-24 21:16:41,571 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:16:41,571 INFO ]: Finished difference Result 84 states and 109 transitions. [2018-06-24 21:16:41,572 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-06-24 21:16:41,572 INFO ]: Start accepts. Automaton has 41 states. Word has length 57 [2018-06-24 21:16:41,572 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:16:41,572 INFO ]: With dead ends: 84 [2018-06-24 21:16:41,572 INFO ]: Without dead ends: 84 [2018-06-24 21:16:41,574 INFO ]: 0 DeclaredPredicates, 113 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1507 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=604, Invalid=4226, Unknown=0, NotChecked=0, Total=4830 [2018-06-24 21:16:41,574 INFO ]: Start minimizeSevpa. Operand 84 states. [2018-06-24 21:16:41,577 INFO ]: Finished minimizeSevpa. Reduced states from 84 to 83. [2018-06-24 21:16:41,577 INFO ]: Start removeUnreachable. Operand 83 states. [2018-06-24 21:16:41,578 INFO ]: Finished removeUnreachable. Reduced from 83 states to 83 states and 106 transitions. [2018-06-24 21:16:41,578 INFO ]: Start accepts. Automaton has 83 states and 106 transitions. Word has length 57 [2018-06-24 21:16:41,578 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:16:41,578 INFO ]: Abstraction has 83 states and 106 transitions. [2018-06-24 21:16:41,578 INFO ]: Interpolant automaton has 41 states. [2018-06-24 21:16:41,578 INFO ]: Start isEmpty. Operand 83 states and 106 transitions. [2018-06-24 21:16:41,579 INFO ]: Finished isEmpty. Found accepting run of length 59 [2018-06-24 21:16:41,579 INFO ]: Found error trace [2018-06-24 21:16:41,579 INFO ]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-24 21:16:41,579 INFO ]: === Iteration 26 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:16:41,580 INFO ]: Analyzing trace with hash -855132886, now seen corresponding path program 22 times [2018-06-24 21:16:41,580 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:16:41,580 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:16:41,580 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:16:41,580 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-24 21:16:41,580 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:16:41,597 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:16:42,006 INFO ]: Checked inductivity of 218 backedges. 16 proven. 136 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2018-06-24 21:16:42,006 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:16:42,006 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-06-24 21:16:42,011 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-24 21:16:42,077 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-24 21:16:42,077 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:16:42,082 INFO ]: Computing forward predicates... [2018-06-24 21:16:42,733 INFO ]: Checked inductivity of 218 backedges. 9 proven. 136 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2018-06-24 21:16:42,751 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-24 21:16:42,751 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 35 [2018-06-24 21:16:42,752 INFO ]: Interpolant automaton has 35 states [2018-06-24 21:16:42,752 INFO ]: Constructing interpolant automaton starting with 35 interpolants. [2018-06-24 21:16:42,752 INFO ]: CoverageRelationStatistics Valid=79, Invalid=1111, Unknown=0, NotChecked=0, Total=1190 [2018-06-24 21:16:42,752 INFO ]: Start difference. First operand 83 states and 106 transitions. Second operand 35 states. [2018-06-24 21:16:43,505 WARN ]: Spent 150.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 23 [2018-06-24 21:16:43,999 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:16:43,999 INFO ]: Finished difference Result 84 states and 107 transitions. [2018-06-24 21:16:43,999 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-06-24 21:16:43,999 INFO ]: Start accepts. Automaton has 35 states. Word has length 58 [2018-06-24 21:16:44,000 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:16:44,000 INFO ]: With dead ends: 84 [2018-06-24 21:16:44,000 INFO ]: Without dead ends: 84 [2018-06-24 21:16:44,001 INFO ]: 0 DeclaredPredicates, 111 GetRequests, 46 SyntacticMatches, 9 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=269, Invalid=3037, Unknown=0, NotChecked=0, Total=3306 [2018-06-24 21:16:44,001 INFO ]: Start minimizeSevpa. Operand 84 states. [2018-06-24 21:16:44,004 INFO ]: Finished minimizeSevpa. Reduced states from 84 to 69. [2018-06-24 21:16:44,004 INFO ]: Start removeUnreachable. Operand 69 states. [2018-06-24 21:16:44,005 INFO ]: Finished removeUnreachable. Reduced from 69 states to 69 states and 90 transitions. [2018-06-24 21:16:44,005 INFO ]: Start accepts. Automaton has 69 states and 90 transitions. Word has length 58 [2018-06-24 21:16:44,005 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:16:44,005 INFO ]: Abstraction has 69 states and 90 transitions. [2018-06-24 21:16:44,005 INFO ]: Interpolant automaton has 35 states. [2018-06-24 21:16:44,005 INFO ]: Start isEmpty. Operand 69 states and 90 transitions. [2018-06-24 21:16:44,006 INFO ]: Finished isEmpty. Found accepting run of length 61 [2018-06-24 21:16:44,006 INFO ]: Found error trace [2018-06-24 21:16:44,006 INFO ]: trace histogram [10, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-24 21:16:44,006 INFO ]: === Iteration 27 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:16:44,006 INFO ]: Analyzing trace with hash -1458861046, now seen corresponding path program 23 times [2018-06-24 21:16:44,006 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:16:44,006 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:16:44,007 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:16:44,007 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-24 21:16:44,007 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:16:44,021 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:16:44,524 INFO ]: Checked inductivity of 237 backedges. 45 proven. 119 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2018-06-24 21:16:44,524 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:16:44,525 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-06-24 21:16:44,530 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-24 21:16:44,588 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-06-24 21:16:44,588 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:16:44,591 INFO ]: Computing forward predicates... [2018-06-24 21:16:44,699 INFO ]: Checked inductivity of 237 backedges. 64 proven. 100 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2018-06-24 21:16:44,718 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-24 21:16:44,718 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2018-06-24 21:16:44,719 INFO ]: Interpolant automaton has 26 states [2018-06-24 21:16:44,719 INFO ]: Constructing interpolant automaton starting with 26 interpolants. [2018-06-24 21:16:44,719 INFO ]: CoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2018-06-24 21:16:44,719 INFO ]: Start difference. First operand 69 states and 90 transitions. Second operand 26 states. [2018-06-24 21:16:44,978 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:16:44,978 INFO ]: Finished difference Result 88 states and 111 transitions. [2018-06-24 21:16:44,979 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-06-24 21:16:44,979 INFO ]: Start accepts. Automaton has 26 states. Word has length 60 [2018-06-24 21:16:44,979 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:16:44,979 INFO ]: With dead ends: 88 [2018-06-24 21:16:44,979 INFO ]: Without dead ends: 64 [2018-06-24 21:16:44,980 INFO ]: 0 DeclaredPredicates, 109 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=459, Invalid=1521, Unknown=0, NotChecked=0, Total=1980 [2018-06-24 21:16:44,980 INFO ]: Start minimizeSevpa. Operand 64 states. [2018-06-24 21:16:44,982 INFO ]: Finished minimizeSevpa. Reduced states from 64 to 63. [2018-06-24 21:16:44,982 INFO ]: Start removeUnreachable. Operand 63 states. [2018-06-24 21:16:44,982 INFO ]: Finished removeUnreachable. Reduced from 63 states to 63 states and 82 transitions. [2018-06-24 21:16:44,982 INFO ]: Start accepts. Automaton has 63 states and 82 transitions. Word has length 60 [2018-06-24 21:16:44,983 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:16:44,983 INFO ]: Abstraction has 63 states and 82 transitions. [2018-06-24 21:16:44,983 INFO ]: Interpolant automaton has 26 states. [2018-06-24 21:16:44,983 INFO ]: Start isEmpty. Operand 63 states and 82 transitions. [2018-06-24 21:16:44,983 INFO ]: Finished isEmpty. Found accepting run of length 64 [2018-06-24 21:16:44,983 INFO ]: Found error trace [2018-06-24 21:16:44,984 INFO ]: trace histogram [10, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-24 21:16:44,984 INFO ]: === Iteration 28 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:16:44,984 INFO ]: Analyzing trace with hash -1915905662, now seen corresponding path program 24 times [2018-06-24 21:16:44,984 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:16:44,984 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:16:44,984 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:16:44,984 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-24 21:16:44,984 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:16:45,001 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:16:45,294 INFO ]: Checked inductivity of 263 backedges. 136 proven. 36 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2018-06-24 21:16:45,294 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:16:45,294 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-06-24 21:16:45,302 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-24 21:16:45,360 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-06-24 21:16:45,360 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:16:45,364 INFO ]: Computing forward predicates... [2018-06-24 21:16:46,192 INFO ]: Checked inductivity of 263 backedges. 18 proven. 162 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2018-06-24 21:16:46,211 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-24 21:16:46,211 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 45 [2018-06-24 21:16:46,211 INFO ]: Interpolant automaton has 45 states [2018-06-24 21:16:46,212 INFO ]: Constructing interpolant automaton starting with 45 interpolants. [2018-06-24 21:16:46,212 INFO ]: CoverageRelationStatistics Valid=271, Invalid=1709, Unknown=0, NotChecked=0, Total=1980 [2018-06-24 21:16:46,212 INFO ]: Start difference. First operand 63 states and 82 transitions. Second operand 45 states. [2018-06-24 21:16:46,984 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:16:46,984 INFO ]: Finished difference Result 91 states and 117 transitions. [2018-06-24 21:16:46,984 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-06-24 21:16:46,984 INFO ]: Start accepts. Automaton has 45 states. Word has length 63 [2018-06-24 21:16:46,984 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:16:46,985 INFO ]: With dead ends: 91 [2018-06-24 21:16:46,985 INFO ]: Without dead ends: 91 [2018-06-24 21:16:46,986 INFO ]: 0 DeclaredPredicates, 125 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1856 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=715, Invalid=5137, Unknown=0, NotChecked=0, Total=5852 [2018-06-24 21:16:46,986 INFO ]: Start minimizeSevpa. Operand 91 states. [2018-06-24 21:16:46,990 INFO ]: Finished minimizeSevpa. Reduced states from 91 to 90. [2018-06-24 21:16:46,990 INFO ]: Start removeUnreachable. Operand 90 states. [2018-06-24 21:16:46,991 INFO ]: Finished removeUnreachable. Reduced from 90 states to 90 states and 114 transitions. [2018-06-24 21:16:46,991 INFO ]: Start accepts. Automaton has 90 states and 114 transitions. Word has length 63 [2018-06-24 21:16:46,991 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:16:46,991 INFO ]: Abstraction has 90 states and 114 transitions. [2018-06-24 21:16:46,991 INFO ]: Interpolant automaton has 45 states. [2018-06-24 21:16:46,991 INFO ]: Start isEmpty. Operand 90 states and 114 transitions. [2018-06-24 21:16:46,992 INFO ]: Finished isEmpty. Found accepting run of length 65 [2018-06-24 21:16:46,992 INFO ]: Found error trace [2018-06-24 21:16:46,992 INFO ]: trace histogram [10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-24 21:16:46,992 INFO ]: === Iteration 29 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:16:46,992 INFO ]: Analyzing trace with hash 736000649, now seen corresponding path program 25 times [2018-06-24 21:16:46,992 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:16:46,992 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:16:46,993 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:16:46,993 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-24 21:16:46,993 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:16:47,008 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:16:47,464 INFO ]: Checked inductivity of 272 backedges. 18 proven. 171 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2018-06-24 21:16:47,464 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:16:47,464 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-06-24 21:16:47,470 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:16:47,534 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:16:47,538 INFO ]: Computing forward predicates... [2018-06-24 21:16:47,921 INFO ]: Checked inductivity of 272 backedges. 10 proven. 171 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2018-06-24 21:16:47,940 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-24 21:16:47,940 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 38 [2018-06-24 21:16:47,940 INFO ]: Interpolant automaton has 38 states [2018-06-24 21:16:47,940 INFO ]: Constructing interpolant automaton starting with 38 interpolants. [2018-06-24 21:16:47,940 INFO ]: CoverageRelationStatistics Valid=86, Invalid=1320, Unknown=0, NotChecked=0, Total=1406 [2018-06-24 21:16:47,940 INFO ]: Start difference. First operand 90 states and 114 transitions. Second operand 38 states. [2018-06-24 21:16:49,207 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:16:49,207 INFO ]: Finished difference Result 91 states and 115 transitions. [2018-06-24 21:16:49,208 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-06-24 21:16:49,208 INFO ]: Start accepts. Automaton has 38 states. Word has length 64 [2018-06-24 21:16:49,209 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:16:49,209 INFO ]: With dead ends: 91 [2018-06-24 21:16:49,209 INFO ]: Without dead ends: 91 [2018-06-24 21:16:49,210 INFO ]: 0 DeclaredPredicates, 122 GetRequests, 51 SyntacticMatches, 10 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=294, Invalid=3612, Unknown=0, NotChecked=0, Total=3906 [2018-06-24 21:16:49,210 INFO ]: Start minimizeSevpa. Operand 91 states. [2018-06-24 21:16:49,213 INFO ]: Finished minimizeSevpa. Reduced states from 91 to 74. [2018-06-24 21:16:49,213 INFO ]: Start removeUnreachable. Operand 74 states. [2018-06-24 21:16:49,214 INFO ]: Finished removeUnreachable. Reduced from 74 states to 74 states and 96 transitions. [2018-06-24 21:16:49,214 INFO ]: Start accepts. Automaton has 74 states and 96 transitions. Word has length 64 [2018-06-24 21:16:49,214 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:16:49,214 INFO ]: Abstraction has 74 states and 96 transitions. [2018-06-24 21:16:49,214 INFO ]: Interpolant automaton has 38 states. [2018-06-24 21:16:49,214 INFO ]: Start isEmpty. Operand 74 states and 96 transitions. [2018-06-24 21:16:49,215 INFO ]: Finished isEmpty. Found accepting run of length 67 [2018-06-24 21:16:49,215 INFO ]: Found error trace [2018-06-24 21:16:49,215 INFO ]: trace histogram [11, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-24 21:16:49,215 INFO ]: === Iteration 30 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:16:49,215 INFO ]: Analyzing trace with hash -1387891287, now seen corresponding path program 26 times [2018-06-24 21:16:49,215 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:16:49,215 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:16:49,215 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:16:49,215 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:16:49,215 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:16:49,229 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:16:49,837 INFO ]: Checked inductivity of 293 backedges. 55 proven. 147 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2018-06-24 21:16:49,837 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:16:49,837 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-06-24 21:16:49,844 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-24 21:16:49,898 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-24 21:16:49,898 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:16:49,901 INFO ]: Computing forward predicates... [2018-06-24 21:16:49,965 INFO ]: Checked inductivity of 293 backedges. 76 proven. 126 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2018-06-24 21:16:49,985 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-24 21:16:49,985 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2018-06-24 21:16:49,985 INFO ]: Interpolant automaton has 28 states [2018-06-24 21:16:49,985 INFO ]: Constructing interpolant automaton starting with 28 interpolants. [2018-06-24 21:16:49,985 INFO ]: CoverageRelationStatistics Valid=169, Invalid=587, Unknown=0, NotChecked=0, Total=756 [2018-06-24 21:16:49,985 INFO ]: Start difference. First operand 74 states and 96 transitions. Second operand 28 states. [2018-06-24 21:16:50,310 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:16:50,310 INFO ]: Finished difference Result 95 states and 119 transitions. [2018-06-24 21:16:50,310 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-06-24 21:16:50,311 INFO ]: Start accepts. Automaton has 28 states. Word has length 66 [2018-06-24 21:16:50,311 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:16:50,311 INFO ]: With dead ends: 95 [2018-06-24 21:16:50,311 INFO ]: Without dead ends: 69 [2018-06-24 21:16:50,312 INFO ]: 0 DeclaredPredicates, 120 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=547, Invalid=1805, Unknown=0, NotChecked=0, Total=2352 [2018-06-24 21:16:50,312 INFO ]: Start minimizeSevpa. Operand 69 states. [2018-06-24 21:16:50,313 INFO ]: Finished minimizeSevpa. Reduced states from 69 to 68. [2018-06-24 21:16:50,313 INFO ]: Start removeUnreachable. Operand 68 states. [2018-06-24 21:16:50,314 INFO ]: Finished removeUnreachable. Reduced from 68 states to 68 states and 88 transitions. [2018-06-24 21:16:50,314 INFO ]: Start accepts. Automaton has 68 states and 88 transitions. Word has length 66 [2018-06-24 21:16:50,314 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:16:50,314 INFO ]: Abstraction has 68 states and 88 transitions. [2018-06-24 21:16:50,314 INFO ]: Interpolant automaton has 28 states. [2018-06-24 21:16:50,314 INFO ]: Start isEmpty. Operand 68 states and 88 transitions. [2018-06-24 21:16:50,314 INFO ]: Finished isEmpty. Found accepting run of length 70 [2018-06-24 21:16:50,314 INFO ]: Found error trace [2018-06-24 21:16:50,314 INFO ]: trace histogram [11, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-24 21:16:50,315 INFO ]: === Iteration 31 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:16:50,315 INFO ]: Analyzing trace with hash 1722631299, now seen corresponding path program 27 times [2018-06-24 21:16:50,317 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:16:50,317 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:16:50,317 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:16:50,317 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-24 21:16:50,317 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:16:50,331 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:16:50,574 INFO ]: Checked inductivity of 322 backedges. 166 proven. 45 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2018-06-24 21:16:50,574 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:16:50,574 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-06-24 21:16:50,580 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-24 21:16:50,646 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-06-24 21:16:50,647 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:16:50,651 INFO ]: Computing forward predicates... [2018-06-24 21:16:51,027 INFO ]: Checked inductivity of 322 backedges. 20 proven. 200 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2018-06-24 21:16:51,046 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-24 21:16:51,046 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 49 [2018-06-24 21:16:51,047 INFO ]: Interpolant automaton has 49 states [2018-06-24 21:16:51,047 INFO ]: Constructing interpolant automaton starting with 49 interpolants. [2018-06-24 21:16:51,047 INFO ]: CoverageRelationStatistics Valid=319, Invalid=2033, Unknown=0, NotChecked=0, Total=2352 [2018-06-24 21:16:51,047 INFO ]: Start difference. First operand 68 states and 88 transitions. Second operand 49 states. [2018-06-24 21:16:51,760 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:16:51,760 INFO ]: Finished difference Result 98 states and 125 transitions. [2018-06-24 21:16:51,760 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-06-24 21:16:51,760 INFO ]: Start accepts. Automaton has 49 states. Word has length 69 [2018-06-24 21:16:51,760 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:16:51,761 INFO ]: With dead ends: 98 [2018-06-24 21:16:51,761 INFO ]: Without dead ends: 98 [2018-06-24 21:16:51,762 INFO ]: 0 DeclaredPredicates, 137 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2241 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=835, Invalid=6137, Unknown=0, NotChecked=0, Total=6972 [2018-06-24 21:16:51,762 INFO ]: Start minimizeSevpa. Operand 98 states. [2018-06-24 21:16:51,766 INFO ]: Finished minimizeSevpa. Reduced states from 98 to 97. [2018-06-24 21:16:51,766 INFO ]: Start removeUnreachable. Operand 97 states. [2018-06-24 21:16:51,767 INFO ]: Finished removeUnreachable. Reduced from 97 states to 97 states and 122 transitions. [2018-06-24 21:16:51,767 INFO ]: Start accepts. Automaton has 97 states and 122 transitions. Word has length 69 [2018-06-24 21:16:51,767 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:16:51,767 INFO ]: Abstraction has 97 states and 122 transitions. [2018-06-24 21:16:51,767 INFO ]: Interpolant automaton has 49 states. [2018-06-24 21:16:51,767 INFO ]: Start isEmpty. Operand 97 states and 122 transitions. [2018-06-24 21:16:51,768 INFO ]: Finished isEmpty. Found accepting run of length 71 [2018-06-24 21:16:51,768 INFO ]: Found error trace [2018-06-24 21:16:51,768 INFO ]: trace histogram [11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-24 21:16:51,768 INFO ]: === Iteration 32 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:16:51,768 INFO ]: Analyzing trace with hash 1861496744, now seen corresponding path program 28 times [2018-06-24 21:16:51,768 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:16:51,768 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:16:51,772 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:16:51,772 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-24 21:16:51,772 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:16:51,786 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:16:52,635 INFO ]: Checked inductivity of 332 backedges. 20 proven. 210 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2018-06-24 21:16:52,635 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:16:52,635 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-06-24 21:16:52,641 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-24 21:16:52,696 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-24 21:16:52,696 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:16:52,703 INFO ]: Computing forward predicates... [2018-06-24 21:16:53,162 INFO ]: Checked inductivity of 332 backedges. 11 proven. 210 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2018-06-24 21:16:53,181 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-24 21:16:53,181 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 41 [2018-06-24 21:16:53,181 INFO ]: Interpolant automaton has 41 states [2018-06-24 21:16:53,181 INFO ]: Constructing interpolant automaton starting with 41 interpolants. [2018-06-24 21:16:53,181 INFO ]: CoverageRelationStatistics Valid=93, Invalid=1547, Unknown=0, NotChecked=0, Total=1640 [2018-06-24 21:16:53,181 INFO ]: Start difference. First operand 97 states and 122 transitions. Second operand 41 states. [2018-06-24 21:16:54,624 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:16:54,624 INFO ]: Finished difference Result 98 states and 123 transitions. [2018-06-24 21:16:54,624 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-06-24 21:16:54,624 INFO ]: Start accepts. Automaton has 41 states. Word has length 70 [2018-06-24 21:16:54,624 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:16:54,625 INFO ]: With dead ends: 98 [2018-06-24 21:16:54,625 INFO ]: Without dead ends: 98 [2018-06-24 21:16:54,626 INFO ]: 0 DeclaredPredicates, 133 GetRequests, 56 SyntacticMatches, 11 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=319, Invalid=4237, Unknown=0, NotChecked=0, Total=4556 [2018-06-24 21:16:54,626 INFO ]: Start minimizeSevpa. Operand 98 states. [2018-06-24 21:16:54,629 INFO ]: Finished minimizeSevpa. Reduced states from 98 to 79. [2018-06-24 21:16:54,629 INFO ]: Start removeUnreachable. Operand 79 states. [2018-06-24 21:16:54,630 INFO ]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2018-06-24 21:16:54,630 INFO ]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 70 [2018-06-24 21:16:54,630 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:16:54,630 INFO ]: Abstraction has 79 states and 102 transitions. [2018-06-24 21:16:54,630 INFO ]: Interpolant automaton has 41 states. [2018-06-24 21:16:54,630 INFO ]: Start isEmpty. Operand 79 states and 102 transitions. [2018-06-24 21:16:54,631 INFO ]: Finished isEmpty. Found accepting run of length 73 [2018-06-24 21:16:54,631 INFO ]: Found error trace [2018-06-24 21:16:54,631 INFO ]: trace histogram [12, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-24 21:16:54,631 INFO ]: === Iteration 33 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:16:54,631 INFO ]: Analyzing trace with hash -2117902584, now seen corresponding path program 29 times [2018-06-24 21:16:54,631 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:16:54,631 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:16:54,632 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:16:54,632 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-24 21:16:54,632 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:16:54,652 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:16:54,973 INFO ]: Checked inductivity of 355 backedges. 66 proven. 178 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2018-06-24 21:16:54,973 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:16:54,973 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-06-24 21:16:54,978 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-24 21:16:55,047 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2018-06-24 21:16:55,047 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:16:55,051 INFO ]: Computing forward predicates... [2018-06-24 21:16:55,109 INFO ]: Checked inductivity of 355 backedges. 89 proven. 155 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2018-06-24 21:16:55,129 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-24 21:16:55,129 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2018-06-24 21:16:55,129 INFO ]: Interpolant automaton has 30 states [2018-06-24 21:16:55,129 INFO ]: Constructing interpolant automaton starting with 30 interpolants. [2018-06-24 21:16:55,129 INFO ]: CoverageRelationStatistics Valid=195, Invalid=675, Unknown=0, NotChecked=0, Total=870 [2018-06-24 21:16:55,129 INFO ]: Start difference. First operand 79 states and 102 transitions. Second operand 30 states. [2018-06-24 21:16:55,452 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:16:55,452 INFO ]: Finished difference Result 102 states and 127 transitions. [2018-06-24 21:16:55,453 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-06-24 21:16:55,453 INFO ]: Start accepts. Automaton has 30 states. Word has length 72 [2018-06-24 21:16:55,453 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:16:55,453 INFO ]: With dead ends: 102 [2018-06-24 21:16:55,453 INFO ]: Without dead ends: 74 [2018-06-24 21:16:55,454 INFO ]: 0 DeclaredPredicates, 131 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=643, Invalid=2113, Unknown=0, NotChecked=0, Total=2756 [2018-06-24 21:16:55,454 INFO ]: Start minimizeSevpa. Operand 74 states. [2018-06-24 21:16:55,458 INFO ]: Finished minimizeSevpa. Reduced states from 74 to 73. [2018-06-24 21:16:55,459 INFO ]: Start removeUnreachable. Operand 73 states. [2018-06-24 21:16:55,459 INFO ]: Finished removeUnreachable. Reduced from 73 states to 73 states and 94 transitions. [2018-06-24 21:16:55,459 INFO ]: Start accepts. Automaton has 73 states and 94 transitions. Word has length 72 [2018-06-24 21:16:55,459 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:16:55,459 INFO ]: Abstraction has 73 states and 94 transitions. [2018-06-24 21:16:55,459 INFO ]: Interpolant automaton has 30 states. [2018-06-24 21:16:55,459 INFO ]: Start isEmpty. Operand 73 states and 94 transitions. [2018-06-24 21:16:55,460 INFO ]: Finished isEmpty. Found accepting run of length 76 [2018-06-24 21:16:55,460 INFO ]: Found error trace [2018-06-24 21:16:55,460 INFO ]: trace histogram [12, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-24 21:16:55,460 INFO ]: === Iteration 34 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:16:55,460 INFO ]: Analyzing trace with hash 1514994884, now seen corresponding path program 30 times [2018-06-24 21:16:55,460 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:16:55,460 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:16:55,461 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:16:55,461 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-24 21:16:55,461 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:16:55,477 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:16:55,741 INFO ]: Checked inductivity of 387 backedges. 199 proven. 55 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2018-06-24 21:16:55,742 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:16:55,742 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-06-24 21:16:55,747 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-24 21:16:55,824 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2018-06-24 21:16:55,824 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:16:55,828 INFO ]: Computing forward predicates... [2018-06-24 21:16:56,260 INFO ]: Checked inductivity of 387 backedges. 22 proven. 242 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2018-06-24 21:16:56,281 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-24 21:16:56,281 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28] total 53 [2018-06-24 21:16:56,281 INFO ]: Interpolant automaton has 53 states [2018-06-24 21:16:56,281 INFO ]: Constructing interpolant automaton starting with 53 interpolants. [2018-06-24 21:16:56,282 INFO ]: CoverageRelationStatistics Valid=371, Invalid=2385, Unknown=0, NotChecked=0, Total=2756 [2018-06-24 21:16:56,282 INFO ]: Start difference. First operand 73 states and 94 transitions. Second operand 53 states. [2018-06-24 21:16:57,465 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:16:57,465 INFO ]: Finished difference Result 105 states and 133 transitions. [2018-06-24 21:16:57,465 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-06-24 21:16:57,465 INFO ]: Start accepts. Automaton has 53 states. Word has length 75 [2018-06-24 21:16:57,465 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:16:57,465 INFO ]: With dead ends: 105 [2018-06-24 21:16:57,465 INFO ]: Without dead ends: 105 [2018-06-24 21:16:57,466 INFO ]: 0 DeclaredPredicates, 149 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2661 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=964, Invalid=7226, Unknown=0, NotChecked=0, Total=8190 [2018-06-24 21:16:57,466 INFO ]: Start minimizeSevpa. Operand 105 states. [2018-06-24 21:16:57,470 INFO ]: Finished minimizeSevpa. Reduced states from 105 to 104. [2018-06-24 21:16:57,470 INFO ]: Start removeUnreachable. Operand 104 states. [2018-06-24 21:16:57,470 INFO ]: Finished removeUnreachable. Reduced from 104 states to 104 states and 130 transitions. [2018-06-24 21:16:57,471 INFO ]: Start accepts. Automaton has 104 states and 130 transitions. Word has length 75 [2018-06-24 21:16:57,471 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:16:57,471 INFO ]: Abstraction has 104 states and 130 transitions. [2018-06-24 21:16:57,471 INFO ]: Interpolant automaton has 53 states. [2018-06-24 21:16:57,471 INFO ]: Start isEmpty. Operand 104 states and 130 transitions. [2018-06-24 21:16:57,472 INFO ]: Finished isEmpty. Found accepting run of length 77 [2018-06-24 21:16:57,472 INFO ]: Found error trace [2018-06-24 21:16:57,472 INFO ]: trace histogram [12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-24 21:16:57,472 INFO ]: === Iteration 35 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:16:57,472 INFO ]: Analyzing trace with hash -280264825, now seen corresponding path program 31 times [2018-06-24 21:16:57,472 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:16:57,472 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:16:57,473 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:16:57,473 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-24 21:16:57,473 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:16:57,491 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:16:58,140 INFO ]: Checked inductivity of 398 backedges. 22 proven. 253 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2018-06-24 21:16:58,140 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:16:58,140 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-06-24 21:16:58,145 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:16:58,204 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:16:58,208 INFO ]: Computing forward predicates... [2018-06-24 21:16:58,690 INFO ]: Checked inductivity of 398 backedges. 12 proven. 253 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2018-06-24 21:16:58,709 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-24 21:16:58,709 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 44 [2018-06-24 21:16:58,709 INFO ]: Interpolant automaton has 44 states [2018-06-24 21:16:58,709 INFO ]: Constructing interpolant automaton starting with 44 interpolants. [2018-06-24 21:16:58,709 INFO ]: CoverageRelationStatistics Valid=100, Invalid=1792, Unknown=0, NotChecked=0, Total=1892 [2018-06-24 21:16:58,709 INFO ]: Start difference. First operand 104 states and 130 transitions. Second operand 44 states. [2018-06-24 21:17:00,324 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:17:00,324 INFO ]: Finished difference Result 105 states and 131 transitions. [2018-06-24 21:17:00,324 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-06-24 21:17:00,324 INFO ]: Start accepts. Automaton has 44 states. Word has length 76 [2018-06-24 21:17:00,325 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:17:00,325 INFO ]: With dead ends: 105 [2018-06-24 21:17:00,325 INFO ]: Without dead ends: 105 [2018-06-24 21:17:00,326 INFO ]: 0 DeclaredPredicates, 144 GetRequests, 61 SyntacticMatches, 12 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 863 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=344, Invalid=4912, Unknown=0, NotChecked=0, Total=5256 [2018-06-24 21:17:00,326 INFO ]: Start minimizeSevpa. Operand 105 states. [2018-06-24 21:17:00,328 INFO ]: Finished minimizeSevpa. Reduced states from 105 to 84. [2018-06-24 21:17:00,328 INFO ]: Start removeUnreachable. Operand 84 states. [2018-06-24 21:17:00,329 INFO ]: Finished removeUnreachable. Reduced from 84 states to 84 states and 108 transitions. [2018-06-24 21:17:00,329 INFO ]: Start accepts. Automaton has 84 states and 108 transitions. Word has length 76 [2018-06-24 21:17:00,329 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:17:00,329 INFO ]: Abstraction has 84 states and 108 transitions. [2018-06-24 21:17:00,329 INFO ]: Interpolant automaton has 44 states. [2018-06-24 21:17:00,329 INFO ]: Start isEmpty. Operand 84 states and 108 transitions. [2018-06-24 21:17:00,330 INFO ]: Finished isEmpty. Found accepting run of length 79 [2018-06-24 21:17:00,330 INFO ]: Found error trace [2018-06-24 21:17:00,330 INFO ]: trace histogram [13, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-24 21:17:00,330 INFO ]: === Iteration 36 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:17:00,330 INFO ]: Analyzing trace with hash 1233531687, now seen corresponding path program 32 times [2018-06-24 21:17:00,330 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:17:00,330 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:17:00,331 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:17:00,331 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:17:00,331 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:17:00,352 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:17:00,740 INFO ]: Checked inductivity of 423 backedges. 78 proven. 212 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2018-06-24 21:17:00,740 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:17:00,740 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-06-24 21:17:00,745 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-24 21:17:00,811 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-24 21:17:00,811 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:17:00,814 INFO ]: Computing forward predicates... [2018-06-24 21:17:00,917 INFO ]: Checked inductivity of 423 backedges. 103 proven. 187 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2018-06-24 21:17:00,936 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-24 21:17:00,936 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 32 [2018-06-24 21:17:00,936 INFO ]: Interpolant automaton has 32 states [2018-06-24 21:17:00,936 INFO ]: Constructing interpolant automaton starting with 32 interpolants. [2018-06-24 21:17:00,936 INFO ]: CoverageRelationStatistics Valid=223, Invalid=769, Unknown=0, NotChecked=0, Total=992 [2018-06-24 21:17:00,936 INFO ]: Start difference. First operand 84 states and 108 transitions. Second operand 32 states. [2018-06-24 21:17:01,321 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:17:01,321 INFO ]: Finished difference Result 109 states and 135 transitions. [2018-06-24 21:17:01,321 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-06-24 21:17:01,321 INFO ]: Start accepts. Automaton has 32 states. Word has length 78 [2018-06-24 21:17:01,321 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:17:01,322 INFO ]: With dead ends: 109 [2018-06-24 21:17:01,322 INFO ]: Without dead ends: 79 [2018-06-24 21:17:01,323 INFO ]: 0 DeclaredPredicates, 142 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=747, Invalid=2445, Unknown=0, NotChecked=0, Total=3192 [2018-06-24 21:17:01,323 INFO ]: Start minimizeSevpa. Operand 79 states. [2018-06-24 21:17:01,326 INFO ]: Finished minimizeSevpa. Reduced states from 79 to 78. [2018-06-24 21:17:01,326 INFO ]: Start removeUnreachable. Operand 78 states. [2018-06-24 21:17:01,327 INFO ]: Finished removeUnreachable. Reduced from 78 states to 78 states and 100 transitions. [2018-06-24 21:17:01,327 INFO ]: Start accepts. Automaton has 78 states and 100 transitions. Word has length 78 [2018-06-24 21:17:01,327 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:17:01,327 INFO ]: Abstraction has 78 states and 100 transitions. [2018-06-24 21:17:01,327 INFO ]: Interpolant automaton has 32 states. [2018-06-24 21:17:01,327 INFO ]: Start isEmpty. Operand 78 states and 100 transitions. [2018-06-24 21:17:01,328 INFO ]: Finished isEmpty. Found accepting run of length 82 [2018-06-24 21:17:01,328 INFO ]: Found error trace [2018-06-24 21:17:01,328 INFO ]: trace histogram [13, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-24 21:17:01,328 INFO ]: === Iteration 37 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:17:01,328 INFO ]: Analyzing trace with hash 1610337605, now seen corresponding path program 33 times [2018-06-24 21:17:01,328 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:17:01,328 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:17:01,329 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:17:01,329 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-24 21:17:01,329 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:17:01,344 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:17:01,837 INFO ]: Checked inductivity of 458 backedges. 235 proven. 66 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2018-06-24 21:17:01,837 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:17:01,837 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-06-24 21:17:01,843 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-24 21:17:01,955 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2018-06-24 21:17:01,955 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:17:01,960 INFO ]: Computing forward predicates... [2018-06-24 21:17:03,438 INFO ]: Checked inductivity of 458 backedges. 24 proven. 288 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2018-06-24 21:17:03,457 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-24 21:17:03,457 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30] total 57 [2018-06-24 21:17:03,457 INFO ]: Interpolant automaton has 57 states [2018-06-24 21:17:03,457 INFO ]: Constructing interpolant automaton starting with 57 interpolants. [2018-06-24 21:17:03,457 INFO ]: CoverageRelationStatistics Valid=427, Invalid=2765, Unknown=0, NotChecked=0, Total=3192 [2018-06-24 21:17:03,457 INFO ]: Start difference. First operand 78 states and 100 transitions. Second operand 57 states. [2018-06-24 21:17:04,283 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:17:04,283 INFO ]: Finished difference Result 112 states and 141 transitions. [2018-06-24 21:17:04,283 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-06-24 21:17:04,283 INFO ]: Start accepts. Automaton has 57 states. Word has length 81 [2018-06-24 21:17:04,283 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:17:04,284 INFO ]: With dead ends: 112 [2018-06-24 21:17:04,284 INFO ]: Without dead ends: 112 [2018-06-24 21:17:04,284 INFO ]: 0 DeclaredPredicates, 161 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3118 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1102, Invalid=8404, Unknown=0, NotChecked=0, Total=9506 [2018-06-24 21:17:04,284 INFO ]: Start minimizeSevpa. Operand 112 states. [2018-06-24 21:17:04,288 INFO ]: Finished minimizeSevpa. Reduced states from 112 to 111. [2018-06-24 21:17:04,288 INFO ]: Start removeUnreachable. Operand 111 states. [2018-06-24 21:17:04,289 INFO ]: Finished removeUnreachable. Reduced from 111 states to 111 states and 138 transitions. [2018-06-24 21:17:04,289 INFO ]: Start accepts. Automaton has 111 states and 138 transitions. Word has length 81 [2018-06-24 21:17:04,289 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:17:04,289 INFO ]: Abstraction has 111 states and 138 transitions. [2018-06-24 21:17:04,289 INFO ]: Interpolant automaton has 57 states. [2018-06-24 21:17:04,289 INFO ]: Start isEmpty. Operand 111 states and 138 transitions. [2018-06-24 21:17:04,290 INFO ]: Finished isEmpty. Found accepting run of length 83 [2018-06-24 21:17:04,290 INFO ]: Found error trace [2018-06-24 21:17:04,290 INFO ]: trace histogram [13, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-24 21:17:04,290 INFO ]: === Iteration 38 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:17:04,290 INFO ]: Analyzing trace with hash -1619607770, now seen corresponding path program 34 times [2018-06-24 21:17:04,290 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:17:04,290 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:17:04,290 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:17:04,290 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-24 21:17:04,290 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:17:04,310 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:17:04,994 INFO ]: Checked inductivity of 470 backedges. 24 proven. 300 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2018-06-24 21:17:04,994 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:17:04,994 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-06-24 21:17:04,999 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-24 21:17:05,082 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-24 21:17:05,082 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:17:05,088 INFO ]: Computing forward predicates... [2018-06-24 21:17:05,664 INFO ]: Checked inductivity of 470 backedges. 13 proven. 300 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2018-06-24 21:17:05,683 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-24 21:17:05,683 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 47 [2018-06-24 21:17:05,684 INFO ]: Interpolant automaton has 47 states [2018-06-24 21:17:05,684 INFO ]: Constructing interpolant automaton starting with 47 interpolants. [2018-06-24 21:17:05,684 INFO ]: CoverageRelationStatistics Valid=107, Invalid=2055, Unknown=0, NotChecked=0, Total=2162 [2018-06-24 21:17:05,684 INFO ]: Start difference. First operand 111 states and 138 transitions. Second operand 47 states. [2018-06-24 21:17:07,466 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:17:07,466 INFO ]: Finished difference Result 112 states and 139 transitions. [2018-06-24 21:17:07,467 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-06-24 21:17:07,467 INFO ]: Start accepts. Automaton has 47 states. Word has length 82 [2018-06-24 21:17:07,467 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:17:07,467 INFO ]: With dead ends: 112 [2018-06-24 21:17:07,467 INFO ]: Without dead ends: 112 [2018-06-24 21:17:07,468 INFO ]: 0 DeclaredPredicates, 155 GetRequests, 66 SyntacticMatches, 13 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=369, Invalid=5637, Unknown=0, NotChecked=0, Total=6006 [2018-06-24 21:17:07,468 INFO ]: Start minimizeSevpa. Operand 112 states. [2018-06-24 21:17:07,471 INFO ]: Finished minimizeSevpa. Reduced states from 112 to 89. [2018-06-24 21:17:07,471 INFO ]: Start removeUnreachable. Operand 89 states. [2018-06-24 21:17:07,472 INFO ]: Finished removeUnreachable. Reduced from 89 states to 89 states and 114 transitions. [2018-06-24 21:17:07,472 INFO ]: Start accepts. Automaton has 89 states and 114 transitions. Word has length 82 [2018-06-24 21:17:07,472 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:17:07,472 INFO ]: Abstraction has 89 states and 114 transitions. [2018-06-24 21:17:07,472 INFO ]: Interpolant automaton has 47 states. [2018-06-24 21:17:07,472 INFO ]: Start isEmpty. Operand 89 states and 114 transitions. [2018-06-24 21:17:07,473 INFO ]: Finished isEmpty. Found accepting run of length 85 [2018-06-24 21:17:07,473 INFO ]: Found error trace [2018-06-24 21:17:07,473 INFO ]: trace histogram [14, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-24 21:17:07,473 INFO ]: === Iteration 39 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:17:07,473 INFO ]: Analyzing trace with hash -1679816954, now seen corresponding path program 35 times [2018-06-24 21:17:07,473 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:17:07,473 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:17:07,473 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:17:07,473 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-24 21:17:07,473 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:17:07,495 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:17:08,567 INFO ]: Checked inductivity of 497 backedges. 91 proven. 249 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2018-06-24 21:17:08,567 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:17:08,567 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-06-24 21:17:08,583 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-24 21:17:08,670 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-06-24 21:17:08,670 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:17:08,676 INFO ]: Computing forward predicates... [2018-06-24 21:17:08,848 INFO ]: Checked inductivity of 497 backedges. 118 proven. 222 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2018-06-24 21:17:08,867 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-24 21:17:08,867 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 34 [2018-06-24 21:17:08,868 INFO ]: Interpolant automaton has 34 states [2018-06-24 21:17:08,868 INFO ]: Constructing interpolant automaton starting with 34 interpolants. [2018-06-24 21:17:08,868 INFO ]: CoverageRelationStatistics Valid=253, Invalid=869, Unknown=0, NotChecked=0, Total=1122 [2018-06-24 21:17:08,868 INFO ]: Start difference. First operand 89 states and 114 transitions. Second operand 34 states. [2018-06-24 21:17:09,269 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:17:09,269 INFO ]: Finished difference Result 116 states and 143 transitions. [2018-06-24 21:17:09,269 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-06-24 21:17:09,269 INFO ]: Start accepts. Automaton has 34 states. Word has length 84 [2018-06-24 21:17:09,270 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:17:09,270 INFO ]: With dead ends: 116 [2018-06-24 21:17:09,270 INFO ]: Without dead ends: 84 [2018-06-24 21:17:09,270 INFO ]: 0 DeclaredPredicates, 153 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=859, Invalid=2801, Unknown=0, NotChecked=0, Total=3660 [2018-06-24 21:17:09,270 INFO ]: Start minimizeSevpa. Operand 84 states. [2018-06-24 21:17:09,273 INFO ]: Finished minimizeSevpa. Reduced states from 84 to 83. [2018-06-24 21:17:09,273 INFO ]: Start removeUnreachable. Operand 83 states. [2018-06-24 21:17:09,273 INFO ]: Finished removeUnreachable. Reduced from 83 states to 83 states and 106 transitions. [2018-06-24 21:17:09,273 INFO ]: Start accepts. Automaton has 83 states and 106 transitions. Word has length 84 [2018-06-24 21:17:09,273 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:17:09,273 INFO ]: Abstraction has 83 states and 106 transitions. [2018-06-24 21:17:09,273 INFO ]: Interpolant automaton has 34 states. [2018-06-24 21:17:09,273 INFO ]: Start isEmpty. Operand 83 states and 106 transitions. [2018-06-24 21:17:09,274 INFO ]: Finished isEmpty. Found accepting run of length 88 [2018-06-24 21:17:09,274 INFO ]: Found error trace [2018-06-24 21:17:09,274 INFO ]: trace histogram [14, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-24 21:17:09,274 INFO ]: === Iteration 40 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:17:09,274 INFO ]: Analyzing trace with hash 630221574, now seen corresponding path program 36 times [2018-06-24 21:17:09,274 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:17:09,274 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:17:09,275 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:17:09,275 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-24 21:17:09,275 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:17:09,292 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:17:09,593 INFO ]: Checked inductivity of 535 backedges. 274 proven. 78 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2018-06-24 21:17:09,593 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:17:09,593 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/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 [2018-06-24 21:17:09,599 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-24 21:17:09,686 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-06-24 21:17:09,686 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:17:09,691 INFO ]: Computing forward predicates... Received shutdown request... [2018-06-24 21:17:10,576 INFO ]: Timeout while computing interpolants [2018-06-24 21:17:10,777 WARN ]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-24 21:17:10,777 WARN ]: Verification canceled [2018-06-24 21:17:10,779 INFO ]: Did not count any witness invariants because Icfg is not BoogieIcfg [2018-06-24 21:17:10,780 WARN ]: Timeout [2018-06-24 21:17:10,780 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.06 09:17:10 BasicIcfg [2018-06-24 21:17:10,780 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-24 21:17:10,782 INFO ]: Toolchain (without parser) took 57407.53 ms. Allocated memory was 304.1 MB in the beginning and 925.4 MB in the end (delta: 621.3 MB). Free memory was 259.6 MB in the beginning and 486.3 MB in the end (delta: -226.7 MB). Peak memory consumption was 394.6 MB. Max. memory is 3.6 GB. [2018-06-24 21:17:10,783 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 304.1 MB. Free memory is still 269.7 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-24 21:17:10,783 INFO ]: ChcToBoogie took 53.13 ms. Allocated memory is still 304.1 MB. Free memory was 259.6 MB in the beginning and 256.6 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. [2018-06-24 21:17:10,783 INFO ]: Boogie Preprocessor took 26.29 ms. Allocated memory is still 304.1 MB. Free memory was 256.6 MB in the beginning and 255.6 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. [2018-06-24 21:17:10,784 INFO ]: RCFGBuilder took 282.59 ms. Allocated memory is still 304.1 MB. Free memory was 255.6 MB in the beginning and 246.6 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 3.6 GB. [2018-06-24 21:17:10,784 INFO ]: BlockEncodingV2 took 145.68 ms. Allocated memory is still 304.1 MB. Free memory was 245.6 MB in the beginning and 241.6 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 3.6 GB. [2018-06-24 21:17:10,784 INFO ]: TraceAbstraction took 56890.56 ms. Allocated memory was 304.1 MB in the beginning and 925.4 MB in the end (delta: 621.3 MB). Free memory was 241.6 MB in the beginning and 486.3 MB in the end (delta: -244.7 MB). Peak memory consumption was 376.6 MB. Max. memory is 3.6 GB. [2018-06-24 21:17:10,789 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.plugins.blockencoding: - StatisticsResult: Initial Icfg 17 locations, 25 edges - StatisticsResult: Encoded RCFG 11 locations, 18 edges * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.07 ms. Allocated memory is still 304.1 MB. Free memory is still 269.7 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 53.13 ms. Allocated memory is still 304.1 MB. Free memory was 259.6 MB in the beginning and 256.6 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 26.29 ms. Allocated memory is still 304.1 MB. Free memory was 256.6 MB in the beginning and 255.6 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. * RCFGBuilder took 282.59 ms. Allocated memory is still 304.1 MB. Free memory was 255.6 MB in the beginning and 246.6 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 3.6 GB. * BlockEncodingV2 took 145.68 ms. Allocated memory is still 304.1 MB. Free memory was 245.6 MB in the beginning and 241.6 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 56890.56 ms. Allocated memory was 304.1 MB in the beginning and 925.4 MB in the end (delta: 621.3 MB). Free memory was 241.6 MB in the beginning and 486.3 MB in the end (delta: -244.7 MB). Peak memory consumption was 376.6 MB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [UNKNOWN] : Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 88 with TraceHistMax 14, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 2 quantified variables from 3 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 11 locations, 1 error locations. TIMEOUT Result, 56.8s OverallTime, 40 OverallIterations, 14 TraceHistogramMax, 25.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 951 SDtfs, 1008 SDslu, 15727 SDs, 0 SdLazy, 17849 SolverSat, 1451 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 9.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3391 GetRequests, 1587 SyntacticMatches, 89 SemanticMatches, 1715 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24433 ImplicationChecksByTransitivity, 36.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=111occurred in iteration=37, 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, 39 MinimizatonAttempts, 169 StatesRemovedByMinimization, 35 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 1.9s SatisfiabilityAnalysisTime, 25.3s InterpolantComputationTime, 3570 NumberOfCodeBlocks, 3570 NumberOfCodeBlocksAsserted, 201 NumberOfCheckSat, 3495 ConstructedInterpolants, 0 QuantifiedInterpolants, 854660 SizeOfPredicates, 706 NumberOfNonLiveVariables, 14017 ConjunctsInSsa, 2561 ConjunctsInUnsatCore, 75 InterpolantComputations, 4 PerfectInterpolantSequences, 6912/13472 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/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/enc-zip_map2.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-GraphSizeCsvProvider-0-2018-06-24_21-17-10-799.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/enc-zip_map2.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-GraphSizeCsvProvider-1-2018-06-24_21-17-10-799.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/enc-zip_map2.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-Benchmark-0-2018-06-24_21-17-10-799.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/enc-zip_map2.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-24_21-17-10-799.csv Completed graceful shutdown