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/bsearch.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-62c3406-m [2018-06-26 18:17:25,865 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-26 18:17:25,867 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-26 18:17:25,880 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-26 18:17:25,880 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-26 18:17:25,883 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-26 18:17:25,884 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-26 18:17:25,890 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-26 18:17:25,892 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-26 18:17:25,892 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-26 18:17:25,894 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-26 18:17:25,895 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-26 18:17:25,895 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-26 18:17:25,896 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-26 18:17:25,897 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-26 18:17:25,898 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-26 18:17:25,900 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-26 18:17:25,902 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-26 18:17:25,911 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-26 18:17:25,913 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-26 18:17:25,913 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-26 18:17:25,914 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-26 18:17:25,919 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-26 18:17:25,920 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-26 18:17:25,920 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-26 18:17:25,921 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-26 18:17:25,921 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-26 18:17:25,924 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-26 18:17:25,925 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-26 18:17:25,925 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-26 18:17:25,926 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-26 18:17:25,926 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-26 18:17:25,926 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-06-26 18:17:25,927 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-26 18:17:25,927 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-26 18:17:25,928 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-26 18:17:25,928 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-26 18:17:25,941 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-26 18:17:25,941 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-26 18:17:25,942 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-26 18:17:25,942 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-26 18:17:25,943 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-26 18:17:25,943 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-26 18:17:25,943 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-26 18:17:25,943 INFO L133 SettingsManager]: * Use SBE=true [2018-06-26 18:17:25,943 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-26 18:17:25,944 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-26 18:17:25,944 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-26 18:17:25,944 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-26 18:17:25,944 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-26 18:17:25,944 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-26 18:17:25,944 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-26 18:17:25,945 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-26 18:17:25,945 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-26 18:17:25,945 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-26 18:17:25,945 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-26 18:17:25,945 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-26 18:17:25,945 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-26 18:17:25,947 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-26 18:17:25,947 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-26 18:17:25,993 INFO ]: Repository-Root is: /tmp [2018-06-26 18:17:26,006 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-26 18:17:26,012 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-26 18:17:26,013 INFO ]: Initializing SmtParser... [2018-06-26 18:17:26,013 INFO ]: SmtParser initialized [2018-06-26 18:17:26,013 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/hopv/lia/mochi/bsearch.smt2 [2018-06-26 18:17:26,014 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 [2018-06-26 18:17:26,108 INFO ]: Executing SMT file /storage/chc-comp/hopv/lia/mochi/bsearch.smt2 unknown [2018-06-26 18:17:26,418 INFO ]: Succesfully executed SMT file /storage/chc-comp/hopv/lia/mochi/bsearch.smt2 [2018-06-26 18:17:26,423 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-26 18:17:26,431 INFO ]: Walking toolchain with 5 elements. [2018-06-26 18:17:26,432 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-26 18:17:26,432 INFO ]: Initializing ChcToBoogie... [2018-06-26 18:17:26,432 INFO ]: ChcToBoogie initialized [2018-06-26 18:17:26,435 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 26.06 06:17:26" (1/1) ... [2018-06-26 18:17:26,497 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 06:17:26 Unit [2018-06-26 18:17:26,497 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-26 18:17:26,499 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-26 18:17:26,499 INFO ]: Initializing Boogie Preprocessor... [2018-06-26 18:17:26,499 INFO ]: Boogie Preprocessor initialized [2018-06-26 18:17:26,519 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 06:17:26" (1/1) ... [2018-06-26 18:17:26,519 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 06:17:26" (1/1) ... [2018-06-26 18:17:26,527 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 06:17:26" (1/1) ... [2018-06-26 18:17:26,527 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 06:17:26" (1/1) ... [2018-06-26 18:17:26,531 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 06:17:26" (1/1) ... [2018-06-26 18:17:26,534 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 06:17:26" (1/1) ... [2018-06-26 18:17:26,535 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 06:17:26" (1/1) ... [2018-06-26 18:17:26,537 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-26 18:17:26,537 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-26 18:17:26,537 INFO ]: Initializing RCFGBuilder... [2018-06-26 18:17:26,537 INFO ]: RCFGBuilder initialized [2018-06-26 18:17:26,538 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 06:17:26" (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) [2018-06-26 18:17:26,556 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-26 18:17:26,556 INFO ]: Found specification of procedure gotoProc [2018-06-26 18:17:26,556 INFO ]: Found implementation of procedure gotoProc [2018-06-26 18:17:26,556 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-26 18:17:26,556 INFO ]: Found specification of procedure Ultimate.START [2018-06-26 18:17:26,556 INFO ]: Found implementation of procedure Ultimate.START Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-26 18:17:26,987 INFO ]: Using library mode [2018-06-26 18:17:26,987 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.06 06:17:26 BoogieIcfgContainer [2018-06-26 18:17:26,987 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-26 18:17:26,989 INFO ]: ------------------------BlockEncodingV2---------------------------- [2018-06-26 18:17:26,989 INFO ]: Initializing BlockEncodingV2... [2018-06-26 18:17:26,990 INFO ]: BlockEncodingV2 initialized [2018-06-26 18:17:26,990 INFO ]: Executing the observer BlockEncodingObserver from plugin BlockEncodingV2 for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.06 06:17:26" (1/1) ... [2018-06-26 18:17:27,006 INFO ]: Initial Icfg 27 locations, 37 edges [2018-06-26 18:17:27,008 INFO ]: Using Remove infeasible edges [2018-06-26 18:17:27,009 INFO ]: Using Maximize final states [2018-06-26 18:17:27,010 INFO ]: Using Minimize states even if more edges are added than removed.=false [2018-06-26 18:17:27,010 INFO ]: Using Minimize states using LBE with the strategy=MULTI [2018-06-26 18:17:27,011 INFO ]: Using Remove sink states [2018-06-26 18:17:27,015 INFO ]: Using Apply optimizations until nothing changes=true [2018-06-26 18:17:27,015 INFO ]: Using Use SBE [2018-06-26 18:17:27,051 INFO ]: SBE split 2 edges [2018-06-26 18:17:27,060 INFO ]: Removed 4 edges and 2 locations because of local infeasibility [2018-06-26 18:17:27,062 INFO ]: 0 new accepting states [2018-06-26 18:17:27,383 INFO ]: Removed 37 edges and 10 locations by large block encoding [2018-06-26 18:17:27,385 INFO ]: Removed 4 edges and 1 locations by removing sink states [2018-06-26 18:17:27,386 INFO ]: Removed 0 edges and 0 locations because of local infeasibility [2018-06-26 18:17:27,386 INFO ]: 0 new accepting states [2018-06-26 18:17:27,387 INFO ]: Removed 0 edges and 0 locations by large block encoding [2018-06-26 18:17:27,388 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-26 18:17:27,388 INFO ]: Encoded RCFG 14 locations, 24 edges [2018-06-26 18:17:27,389 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 26.06 06:17:27 BasicIcfg [2018-06-26 18:17:27,389 INFO ]: ------------------------ END BlockEncodingV2---------------------------- [2018-06-26 18:17:27,390 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-26 18:17:27,390 INFO ]: Initializing TraceAbstraction... [2018-06-26 18:17:27,393 INFO ]: TraceAbstraction initialized [2018-06-26 18:17:27,393 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 26.06 06:17:26" (1/4) ... [2018-06-26 18:17:27,394 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b225b43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 26.06 06:17:27, skipping insertion in model container [2018-06-26 18:17:27,394 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 06:17:26" (2/4) ... [2018-06-26 18:17:27,395 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b225b43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.06 06:17:27, skipping insertion in model container [2018-06-26 18:17:27,395 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.06 06:17:26" (3/4) ... [2018-06-26 18:17:27,395 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b225b43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.06 06:17:27, skipping insertion in model container [2018-06-26 18:17:27,395 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 26.06 06:17:27" (4/4) ... [2018-06-26 18:17:27,396 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver_BEv2 [2018-06-26 18:17:27,403 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-26 18:17:27,411 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-26 18:17:27,451 INFO ]: Using default assertion order modulation [2018-06-26 18:17:27,451 INFO ]: Interprodecural is true [2018-06-26 18:17:27,451 INFO ]: Hoare is false [2018-06-26 18:17:27,452 INFO ]: Compute interpolants for FPandBP [2018-06-26 18:17:27,452 INFO ]: Backedges is TWOTRACK [2018-06-26 18:17:27,452 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-26 18:17:27,452 INFO ]: Difference is false [2018-06-26 18:17:27,452 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-26 18:17:27,452 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-26 18:17:27,461 INFO ]: Start isEmpty. Operand 14 states. [2018-06-26 18:17:27,469 INFO ]: Finished isEmpty. Found accepting run of length 5 [2018-06-26 18:17:27,469 INFO ]: Found error trace [2018-06-26 18:17:27,469 INFO ]: trace histogram [1, 1, 1, 1] [2018-06-26 18:17:27,469 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 18:17:27,473 INFO ]: Analyzing trace with hash 1243594, now seen corresponding path program 1 times [2018-06-26 18:17:27,474 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 18:17:27,474 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 18:17:27,505 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:17:27,505 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 18:17:27,505 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:17:27,539 INFO ]: Conjunction of SSA is unsat [2018-06-26 18:17:27,600 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 18:17:27,602 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-26 18:17:27,602 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-26 18:17:27,603 INFO ]: Interpolant automaton has 3 states [2018-06-26 18:17:27,615 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-26 18:17:27,616 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-26 18:17:27,618 INFO ]: Start difference. First operand 14 states. Second operand 3 states. [2018-06-26 18:17:27,847 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 18:17:27,847 INFO ]: Finished difference Result 25 states and 44 transitions. [2018-06-26 18:17:27,848 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-26 18:17:27,849 INFO ]: Start accepts. Automaton has 3 states. Word has length 4 [2018-06-26 18:17:27,849 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 18:17:27,867 INFO ]: With dead ends: 25 [2018-06-26 18:17:27,867 INFO ]: Without dead ends: 25 [2018-06-26 18:17:27,869 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 [2018-06-26 18:17:27,888 INFO ]: Start minimizeSevpa. Operand 25 states. [2018-06-26 18:17:27,921 INFO ]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-06-26 18:17:27,923 INFO ]: Start removeUnreachable. Operand 25 states. [2018-06-26 18:17:27,925 INFO ]: Finished removeUnreachable. Reduced from 25 states to 25 states and 44 transitions. [2018-06-26 18:17:27,927 INFO ]: Start accepts. Automaton has 25 states and 44 transitions. Word has length 4 [2018-06-26 18:17:27,928 INFO ]: Finished accepts. word is rejected. [2018-06-26 18:17:27,928 INFO ]: Abstraction has 25 states and 44 transitions. [2018-06-26 18:17:27,928 INFO ]: Interpolant automaton has 3 states. [2018-06-26 18:17:27,928 INFO ]: Start isEmpty. Operand 25 states and 44 transitions. [2018-06-26 18:17:27,931 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-26 18:17:27,931 INFO ]: Found error trace [2018-06-26 18:17:27,931 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-26 18:17:27,931 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 18:17:27,931 INFO ]: Analyzing trace with hash -1839005060, now seen corresponding path program 1 times [2018-06-26 18:17:27,931 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 18:17:27,931 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 18:17:27,939 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:17:27,939 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 18:17:27,939 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:17:27,969 INFO ]: Conjunction of SSA is unsat [2018-06-26 18:17:28,027 INFO ]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-26 18:17:28,027 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-26 18:17:28,027 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 [2018-06-26 18:17:28,034 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 18:17:28,081 INFO ]: Conjunction of SSA is unsat [2018-06-26 18:17:28,089 INFO ]: Computing forward predicates... [2018-06-26 18:17:28,110 INFO ]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-06-26 18:17:28,145 INFO ]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-06-26 18:17:28,145 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 3 [2018-06-26 18:17:28,145 INFO ]: Interpolant automaton has 3 states [2018-06-26 18:17:28,145 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-26 18:17:28,146 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-26 18:17:28,146 INFO ]: Start difference. First operand 25 states and 44 transitions. Second operand 3 states. [2018-06-26 18:17:28,453 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 18:17:28,453 INFO ]: Finished difference Result 36 states and 62 transitions. [2018-06-26 18:17:28,453 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-26 18:17:28,453 INFO ]: Start accepts. Automaton has 3 states. Word has length 13 [2018-06-26 18:17:28,454 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 18:17:28,456 INFO ]: With dead ends: 36 [2018-06-26 18:17:28,456 INFO ]: Without dead ends: 36 [2018-06-26 18:17:28,457 INFO ]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-26 18:17:28,457 INFO ]: Start minimizeSevpa. Operand 36 states. [2018-06-26 18:17:28,481 INFO ]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-06-26 18:17:28,481 INFO ]: Start removeUnreachable. Operand 36 states. [2018-06-26 18:17:28,483 INFO ]: Finished removeUnreachable. Reduced from 36 states to 36 states and 62 transitions. [2018-06-26 18:17:28,483 INFO ]: Start accepts. Automaton has 36 states and 62 transitions. Word has length 13 [2018-06-26 18:17:28,483 INFO ]: Finished accepts. word is rejected. [2018-06-26 18:17:28,483 INFO ]: Abstraction has 36 states and 62 transitions. [2018-06-26 18:17:28,483 INFO ]: Interpolant automaton has 3 states. [2018-06-26 18:17:28,483 INFO ]: Start isEmpty. Operand 36 states and 62 transitions. [2018-06-26 18:17:28,487 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-26 18:17:28,487 INFO ]: Found error trace [2018-06-26 18:17:28,487 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-26 18:17:28,487 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 18:17:28,488 INFO ]: Analyzing trace with hash 648507773, now seen corresponding path program 1 times [2018-06-26 18:17:28,488 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 18:17:28,488 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 18:17:28,488 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:17:28,488 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 18:17:28,488 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:17:28,529 INFO ]: Conjunction of SSA is unsat [2018-06-26 18:17:28,614 INFO ]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-26 18:17:28,614 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-26 18:17:28,614 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 [2018-06-26 18:17:28,631 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 18:17:28,677 INFO ]: Conjunction of SSA is unsat [2018-06-26 18:17:28,679 INFO ]: Computing forward predicates... [2018-06-26 18:17:28,845 INFO ]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-26 18:17:28,879 INFO ]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-06-26 18:17:28,879 INFO ]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2018-06-26 18:17:28,880 INFO ]: Interpolant automaton has 8 states [2018-06-26 18:17:28,880 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-26 18:17:28,880 INFO ]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-06-26 18:17:28,880 INFO ]: Start difference. First operand 36 states and 62 transitions. Second operand 8 states. [2018-06-26 18:17:29,133 WARN ]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-06-26 18:17:29,806 WARN ]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-06-26 18:17:30,654 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 18:17:30,654 INFO ]: Finished difference Result 131 states and 260 transitions. [2018-06-26 18:17:30,655 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-06-26 18:17:30,655 INFO ]: Start accepts. Automaton has 8 states. Word has length 13 [2018-06-26 18:17:30,655 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 18:17:30,663 INFO ]: With dead ends: 131 [2018-06-26 18:17:30,663 INFO ]: Without dead ends: 107 [2018-06-26 18:17:30,664 INFO ]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2018-06-26 18:17:30,664 INFO ]: Start minimizeSevpa. Operand 107 states. [2018-06-26 18:17:30,705 INFO ]: Finished minimizeSevpa. Reduced states from 107 to 94. [2018-06-26 18:17:30,705 INFO ]: Start removeUnreachable. Operand 94 states. [2018-06-26 18:17:30,709 INFO ]: Finished removeUnreachable. Reduced from 94 states to 94 states and 163 transitions. [2018-06-26 18:17:30,709 INFO ]: Start accepts. Automaton has 94 states and 163 transitions. Word has length 13 [2018-06-26 18:17:30,709 INFO ]: Finished accepts. word is rejected. [2018-06-26 18:17:30,709 INFO ]: Abstraction has 94 states and 163 transitions. [2018-06-26 18:17:30,709 INFO ]: Interpolant automaton has 8 states. [2018-06-26 18:17:30,709 INFO ]: Start isEmpty. Operand 94 states and 163 transitions. [2018-06-26 18:17:30,713 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-26 18:17:30,713 INFO ]: Found error trace [2018-06-26 18:17:30,713 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-26 18:17:30,713 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 18:17:30,713 INFO ]: Analyzing trace with hash 777590492, now seen corresponding path program 1 times [2018-06-26 18:17:30,713 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 18:17:30,713 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 18:17:30,714 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:17:30,714 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 18:17:30,714 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:17:30,738 INFO ]: Conjunction of SSA is unsat [2018-06-26 18:17:30,814 INFO ]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-06-26 18:17:30,814 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-26 18:17:30,814 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-26 18:17:30,814 INFO ]: Interpolant automaton has 3 states [2018-06-26 18:17:30,814 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-26 18:17:30,814 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-26 18:17:30,814 INFO ]: Start difference. First operand 94 states and 163 transitions. Second operand 3 states. [2018-06-26 18:17:30,841 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 18:17:30,841 INFO ]: Finished difference Result 72 states and 118 transitions. [2018-06-26 18:17:30,843 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-26 18:17:30,843 INFO ]: Start accepts. Automaton has 3 states. Word has length 13 [2018-06-26 18:17:30,843 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 18:17:30,844 INFO ]: With dead ends: 72 [2018-06-26 18:17:30,844 INFO ]: Without dead ends: 68 [2018-06-26 18:17:30,845 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 [2018-06-26 18:17:30,845 INFO ]: Start minimizeSevpa. Operand 68 states. [2018-06-26 18:17:30,853 INFO ]: Finished minimizeSevpa. Reduced states from 68 to 51. [2018-06-26 18:17:30,853 INFO ]: Start removeUnreachable. Operand 51 states. [2018-06-26 18:17:30,857 INFO ]: Finished removeUnreachable. Reduced from 51 states to 51 states and 86 transitions. [2018-06-26 18:17:30,857 INFO ]: Start accepts. Automaton has 51 states and 86 transitions. Word has length 13 [2018-06-26 18:17:30,857 INFO ]: Finished accepts. word is rejected. [2018-06-26 18:17:30,857 INFO ]: Abstraction has 51 states and 86 transitions. [2018-06-26 18:17:30,857 INFO ]: Interpolant automaton has 3 states. [2018-06-26 18:17:30,858 INFO ]: Start isEmpty. Operand 51 states and 86 transitions. [2018-06-26 18:17:30,859 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-26 18:17:30,859 INFO ]: Found error trace [2018-06-26 18:17:30,859 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-26 18:17:30,859 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 18:17:30,859 INFO ]: Analyzing trace with hash -1158650293, now seen corresponding path program 1 times [2018-06-26 18:17:30,860 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 18:17:30,860 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 18:17:30,860 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:17:30,860 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 18:17:30,860 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:17:30,865 INFO ]: Conjunction of SSA is unsat [2018-06-26 18:17:30,901 INFO ]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-06-26 18:17:30,901 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-26 18:17:30,901 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-26 18:17:30,901 INFO ]: Interpolant automaton has 3 states [2018-06-26 18:17:30,901 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-26 18:17:30,901 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-26 18:17:30,901 INFO ]: Start difference. First operand 51 states and 86 transitions. Second operand 3 states. [2018-06-26 18:17:30,952 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 18:17:30,952 INFO ]: Finished difference Result 61 states and 101 transitions. [2018-06-26 18:17:30,956 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-26 18:17:30,956 INFO ]: Start accepts. Automaton has 3 states. Word has length 13 [2018-06-26 18:17:30,956 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 18:17:30,957 INFO ]: With dead ends: 61 [2018-06-26 18:17:30,957 INFO ]: Without dead ends: 51 [2018-06-26 18:17:30,957 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 [2018-06-26 18:17:30,958 INFO ]: Start minimizeSevpa. Operand 51 states. [2018-06-26 18:17:30,963 INFO ]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-06-26 18:17:30,963 INFO ]: Start removeUnreachable. Operand 51 states. [2018-06-26 18:17:30,964 INFO ]: Finished removeUnreachable. Reduced from 51 states to 51 states and 85 transitions. [2018-06-26 18:17:30,964 INFO ]: Start accepts. Automaton has 51 states and 85 transitions. Word has length 13 [2018-06-26 18:17:30,964 INFO ]: Finished accepts. word is rejected. [2018-06-26 18:17:30,964 INFO ]: Abstraction has 51 states and 85 transitions. [2018-06-26 18:17:30,964 INFO ]: Interpolant automaton has 3 states. [2018-06-26 18:17:30,964 INFO ]: Start isEmpty. Operand 51 states and 85 transitions. [2018-06-26 18:17:30,966 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-26 18:17:30,966 INFO ]: Found error trace [2018-06-26 18:17:30,966 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-26 18:17:30,966 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 18:17:30,966 INFO ]: Analyzing trace with hash 1164838649, now seen corresponding path program 1 times [2018-06-26 18:17:30,966 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 18:17:30,966 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 18:17:30,967 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:17:30,967 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 18:17:30,967 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:17:30,979 INFO ]: Conjunction of SSA is unsat [2018-06-26 18:17:31,020 INFO ]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-26 18:17:31,020 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-26 18:17:31,020 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 [2018-06-26 18:17:31,029 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 18:17:31,073 INFO ]: Conjunction of SSA is unsat [2018-06-26 18:17:31,075 INFO ]: Computing forward predicates... [2018-06-26 18:17:31,260 INFO ]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-06-26 18:17:31,279 INFO ]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-06-26 18:17:31,279 INFO ]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2018-06-26 18:17:31,279 INFO ]: Interpolant automaton has 7 states [2018-06-26 18:17:31,279 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-26 18:17:31,279 INFO ]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-06-26 18:17:31,279 INFO ]: Start difference. First operand 51 states and 85 transitions. Second operand 7 states. [2018-06-26 18:17:31,617 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 18:17:31,617 INFO ]: Finished difference Result 93 states and 190 transitions. [2018-06-26 18:17:31,642 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-26 18:17:31,642 INFO ]: Start accepts. Automaton has 7 states. Word has length 13 [2018-06-26 18:17:31,642 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 18:17:31,644 INFO ]: With dead ends: 93 [2018-06-26 18:17:31,644 INFO ]: Without dead ends: 93 [2018-06-26 18:17:31,645 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2018-06-26 18:17:31,645 INFO ]: Start minimizeSevpa. Operand 93 states. [2018-06-26 18:17:31,661 INFO ]: Finished minimizeSevpa. Reduced states from 93 to 60. [2018-06-26 18:17:31,661 INFO ]: Start removeUnreachable. Operand 60 states. [2018-06-26 18:17:31,662 INFO ]: Finished removeUnreachable. Reduced from 60 states to 60 states and 109 transitions. [2018-06-26 18:17:31,662 INFO ]: Start accepts. Automaton has 60 states and 109 transitions. Word has length 13 [2018-06-26 18:17:31,662 INFO ]: Finished accepts. word is rejected. [2018-06-26 18:17:31,662 INFO ]: Abstraction has 60 states and 109 transitions. [2018-06-26 18:17:31,662 INFO ]: Interpolant automaton has 7 states. [2018-06-26 18:17:31,662 INFO ]: Start isEmpty. Operand 60 states and 109 transitions. [2018-06-26 18:17:31,665 INFO ]: Finished isEmpty. Found accepting run of length 28 [2018-06-26 18:17:31,665 INFO ]: Found error trace [2018-06-26 18:17:31,665 INFO ]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-26 18:17:31,665 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 18:17:31,665 INFO ]: Analyzing trace with hash -609756980, now seen corresponding path program 1 times [2018-06-26 18:17:31,665 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 18:17:31,665 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 18:17:31,666 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:17:31,666 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 18:17:31,666 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:17:31,691 INFO ]: Conjunction of SSA is unsat [2018-06-26 18:17:31,776 INFO ]: Checked inductivity of 37 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-26 18:17:31,777 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-26 18:17:31,777 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 [2018-06-26 18:17:31,783 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 18:17:31,814 INFO ]: Conjunction of SSA is unsat [2018-06-26 18:17:31,817 INFO ]: Computing forward predicates... [2018-06-26 18:17:31,955 INFO ]: Checked inductivity of 37 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-06-26 18:17:31,976 INFO ]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-06-26 18:17:31,976 INFO ]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 9 [2018-06-26 18:17:31,976 INFO ]: Interpolant automaton has 9 states [2018-06-26 18:17:31,976 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-26 18:17:31,976 INFO ]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-06-26 18:17:31,976 INFO ]: Start difference. First operand 60 states and 109 transitions. Second operand 9 states. [2018-06-26 18:17:32,212 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 18:17:32,212 INFO ]: Finished difference Result 88 states and 166 transitions. [2018-06-26 18:17:32,212 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-06-26 18:17:32,212 INFO ]: Start accepts. Automaton has 9 states. Word has length 27 [2018-06-26 18:17:32,212 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 18:17:32,214 INFO ]: With dead ends: 88 [2018-06-26 18:17:32,214 INFO ]: Without dead ends: 81 [2018-06-26 18:17:32,214 INFO ]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2018-06-26 18:17:32,214 INFO ]: Start minimizeSevpa. Operand 81 states. [2018-06-26 18:17:32,224 INFO ]: Finished minimizeSevpa. Reduced states from 81 to 72. [2018-06-26 18:17:32,224 INFO ]: Start removeUnreachable. Operand 72 states. [2018-06-26 18:17:32,226 INFO ]: Finished removeUnreachable. Reduced from 72 states to 72 states and 135 transitions. [2018-06-26 18:17:32,226 INFO ]: Start accepts. Automaton has 72 states and 135 transitions. Word has length 27 [2018-06-26 18:17:32,226 INFO ]: Finished accepts. word is rejected. [2018-06-26 18:17:32,226 INFO ]: Abstraction has 72 states and 135 transitions. [2018-06-26 18:17:32,226 INFO ]: Interpolant automaton has 9 states. [2018-06-26 18:17:32,226 INFO ]: Start isEmpty. Operand 72 states and 135 transitions. [2018-06-26 18:17:32,228 INFO ]: Finished isEmpty. Found accepting run of length 28 [2018-06-26 18:17:32,229 INFO ]: Found error trace [2018-06-26 18:17:32,229 INFO ]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-26 18:17:32,229 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 18:17:32,229 INFO ]: Analyzing trace with hash 1571301002, now seen corresponding path program 1 times [2018-06-26 18:17:32,229 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 18:17:32,229 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 18:17:32,230 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:17:32,230 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 18:17:32,230 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:17:32,255 INFO ]: Conjunction of SSA is unsat [2018-06-26 18:17:32,328 INFO ]: Checked inductivity of 37 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2018-06-26 18:17:32,328 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-26 18:17:32,328 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) [2018-06-26 18:17:32,342 INFO ]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-26 18:17:32,395 INFO ]: Conjunction of SSA is unsat [2018-06-26 18:17:32,399 INFO ]: Computing forward predicates... [2018-06-26 18:17:32,514 INFO ]: Checked inductivity of 37 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-26 18:17:32,533 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-26 18:17:32,533 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 9] total 11 [2018-06-26 18:17:32,534 INFO ]: Interpolant automaton has 11 states [2018-06-26 18:17:32,534 INFO ]: Constructing interpolant automaton starting with 11 interpolants. [2018-06-26 18:17:32,534 INFO ]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-06-26 18:17:32,534 INFO ]: Start difference. First operand 72 states and 135 transitions. Second operand 11 states. [2018-06-26 18:17:33,668 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 18:17:33,669 INFO ]: Finished difference Result 118 states and 234 transitions. [2018-06-26 18:17:33,669 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-06-26 18:17:33,669 INFO ]: Start accepts. Automaton has 11 states. Word has length 27 [2018-06-26 18:17:33,669 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 18:17:33,671 INFO ]: With dead ends: 118 [2018-06-26 18:17:33,671 INFO ]: Without dead ends: 105 [2018-06-26 18:17:33,672 INFO ]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2018-06-26 18:17:33,672 INFO ]: Start minimizeSevpa. Operand 105 states. [2018-06-26 18:17:33,683 INFO ]: Finished minimizeSevpa. Reduced states from 105 to 72. [2018-06-26 18:17:33,683 INFO ]: Start removeUnreachable. Operand 72 states. [2018-06-26 18:17:33,684 INFO ]: Finished removeUnreachable. Reduced from 72 states to 72 states and 130 transitions. [2018-06-26 18:17:33,685 INFO ]: Start accepts. Automaton has 72 states and 130 transitions. Word has length 27 [2018-06-26 18:17:33,685 INFO ]: Finished accepts. word is rejected. [2018-06-26 18:17:33,685 INFO ]: Abstraction has 72 states and 130 transitions. [2018-06-26 18:17:33,685 INFO ]: Interpolant automaton has 11 states. [2018-06-26 18:17:33,685 INFO ]: Start isEmpty. Operand 72 states and 130 transitions. [2018-06-26 18:17:33,687 INFO ]: Finished isEmpty. Found accepting run of length 28 [2018-06-26 18:17:33,687 INFO ]: Found error trace [2018-06-26 18:17:33,687 INFO ]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-26 18:17:33,687 INFO ]: === Iteration 9 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 18:17:33,687 INFO ]: Analyzing trace with hash 1664360423, now seen corresponding path program 1 times [2018-06-26 18:17:33,687 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 18:17:33,687 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 18:17:33,688 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:17:33,688 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 18:17:33,688 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:17:33,710 INFO ]: Conjunction of SSA is unsat [2018-06-26 18:17:33,788 INFO ]: Checked inductivity of 37 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-06-26 18:17:33,788 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-26 18:17:33,788 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 [2018-06-26 18:17:33,795 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 18:17:33,840 INFO ]: Conjunction of SSA is unsat [2018-06-26 18:17:33,843 INFO ]: Computing forward predicates... [2018-06-26 18:17:34,000 INFO ]: Checked inductivity of 37 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-26 18:17:34,019 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-26 18:17:34,019 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 12 [2018-06-26 18:17:34,020 INFO ]: Interpolant automaton has 12 states [2018-06-26 18:17:34,020 INFO ]: Constructing interpolant automaton starting with 12 interpolants. [2018-06-26 18:17:34,020 INFO ]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2018-06-26 18:17:34,020 INFO ]: Start difference. First operand 72 states and 130 transitions. Second operand 12 states. [2018-06-26 18:17:34,495 WARN ]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-06-26 18:17:34,771 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 18:17:34,771 INFO ]: Finished difference Result 49 states and 73 transitions. [2018-06-26 18:17:34,772 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-06-26 18:17:34,772 INFO ]: Start accepts. Automaton has 12 states. Word has length 27 [2018-06-26 18:17:34,772 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 18:17:34,772 INFO ]: With dead ends: 49 [2018-06-26 18:17:34,772 INFO ]: Without dead ends: 0 [2018-06-26 18:17:34,772 INFO ]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2018-06-26 18:17:34,772 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-26 18:17:34,772 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-26 18:17:34,772 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-26 18:17:34,772 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-26 18:17:34,772 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2018-06-26 18:17:34,772 INFO ]: Finished accepts. word is rejected. [2018-06-26 18:17:34,773 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-26 18:17:34,773 INFO ]: Interpolant automaton has 12 states. [2018-06-26 18:17:34,773 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-26 18:17:34,773 INFO ]: Finished isEmpty. No accepting run. [2018-06-26 18:17:34,775 INFO ]: Did not count any witness invariants because Icfg is not BoogieIcfg [2018-06-26 18:17:34,776 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.06 06:17:34 BasicIcfg [2018-06-26 18:17:34,777 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-26 18:17:34,777 INFO ]: Toolchain (without parser) took 8354.01 ms. Allocated memory was 304.1 MB in the beginning and 376.4 MB in the end (delta: 72.4 MB). Free memory was 254.4 MB in the beginning and 202.3 MB in the end (delta: 52.1 MB). Peak memory consumption was 124.4 MB. Max. memory is 3.6 GB. [2018-06-26 18:17:34,778 INFO ]: SmtParser took 0.05 ms. Allocated memory is still 304.1 MB. Free memory is still 269.5 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-26 18:17:34,779 INFO ]: ChcToBoogie took 65.72 ms. Allocated memory is still 304.1 MB. Free memory was 254.4 MB in the beginning and 251.4 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. [2018-06-26 18:17:34,779 INFO ]: Boogie Preprocessor took 37.69 ms. Allocated memory is still 304.1 MB. Free memory was 251.4 MB in the beginning and 250.4 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. [2018-06-26 18:17:34,780 INFO ]: RCFGBuilder took 450.09 ms. Allocated memory is still 304.1 MB. Free memory was 250.4 MB in the beginning and 237.4 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 3.6 GB. [2018-06-26 18:17:34,780 INFO ]: BlockEncodingV2 took 399.74 ms. Allocated memory is still 304.1 MB. Free memory was 237.4 MB in the beginning and 225.4 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 3.6 GB. [2018-06-26 18:17:34,781 INFO ]: TraceAbstraction took 7386.77 ms. Allocated memory was 304.1 MB in the beginning and 376.4 MB in the end (delta: 72.4 MB). Free memory was 225.4 MB in the beginning and 202.3 MB in the end (delta: 23.0 MB). Peak memory consumption was 95.4 MB. Max. memory is 3.6 GB. [2018-06-26 18:17:34,799 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.plugins.blockencoding: - StatisticsResult: Initial Icfg 27 locations, 37 edges - StatisticsResult: Encoded RCFG 14 locations, 24 edges * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.05 ms. Allocated memory is still 304.1 MB. Free memory is still 269.5 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 65.72 ms. Allocated memory is still 304.1 MB. Free memory was 254.4 MB in the beginning and 251.4 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 37.69 ms. Allocated memory is still 304.1 MB. Free memory was 251.4 MB in the beginning and 250.4 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. * RCFGBuilder took 450.09 ms. Allocated memory is still 304.1 MB. Free memory was 250.4 MB in the beginning and 237.4 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 3.6 GB. * BlockEncodingV2 took 399.74 ms. Allocated memory is still 304.1 MB. Free memory was 237.4 MB in the beginning and 225.4 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 7386.77 ms. Allocated memory was 304.1 MB in the beginning and 376.4 MB in the end (delta: 72.4 MB). Free memory was 225.4 MB in the beginning and 202.3 MB in the end (delta: 23.0 MB). Peak memory consumption was 95.4 MB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [UNKNOWN] : assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 14 locations, 1 error locations. SAFE Result, 7.3s OverallTime, 9 OverallIterations, 2 TraceHistogramMax, 4.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 280 SDtfs, 202 SDslu, 472 SDs, 0 SdLazy, 1290 SolverSat, 256 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 199 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 2.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=94occurred in iteration=3, 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: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 105 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 270 NumberOfCodeBlocks, 270 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 255 ConstructedInterpolants, 8 QuantifiedInterpolants, 13589 SizeOfPredicates, 50 NumberOfNonLiveVariables, 1110 ConjunctsInSsa, 96 ConjunctsInUnsatCore, 15 InterpolantComputations, 7 PerfectInterpolantSequences, 251/270 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/bsearch.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-GraphSizeCsvProvider-0-2018-06-26_18-17-34-811.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/bsearch.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-GraphSizeCsvProvider-1-2018-06-26_18-17-34-811.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/bsearch.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-Benchmark-0-2018-06-26_18-17-34-811.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/bsearch.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-26_18-17-34-811.csv Received shutdown request...