java -Xss1g -Xmx4000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCHC.xml --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_No_Goto.epf -i /storage/chc-comp/llreve-bench/smt2/rec__limit3.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 12:17:27,473 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 12:17:27,475 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 12:17:27,488 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 12:17:27,488 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 12:17:27,489 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 12:17:27,493 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 12:17:27,495 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 12:17:27,496 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 12:17:27,498 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 12:17:27,499 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 12:17:27,499 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 12:17:27,500 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 12:17:27,501 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 12:17:27,501 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 12:17:27,505 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 12:17:27,507 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 12:17:27,520 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 12:17:27,521 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 12:17:27,522 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 12:17:27,523 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 12:17:27,525 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 12:17:27,526 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 12:17:27,526 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 12:17:27,527 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 12:17:27,527 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 12:17:27,532 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 12:17:27,533 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 12:17:27,534 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 12:17:27,534 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 12:17:27,535 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 12:17:27,535 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 12:17:27,535 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 12:17:27,536 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 12:17:27,537 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 12:17:27,537 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_No_Goto.epf [2018-06-22 12:17:27,562 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 12:17:27,562 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 12:17:27,563 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 12:17:27,563 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 12:17:27,564 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 12:17:27,564 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 12:17:27,564 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 12:17:27,564 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 12:17:27,565 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 12:17:27,565 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 12:17:27,565 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 12:17:27,565 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 12:17:27,565 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 12:17:27,566 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 12:17:27,566 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 12:17:27,566 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 12:17:27,567 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 12:17:27,567 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 12:17:27,567 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 12:17:27,568 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 12:17:27,569 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 12:17:27,617 INFO ]: Repository-Root is: /tmp [2018-06-22 12:17:27,634 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 12:17:27,639 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 12:17:27,640 INFO ]: Initializing SmtParser... [2018-06-22 12:17:27,641 INFO ]: SmtParser initialized [2018-06-22 12:17:27,642 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/llreve-bench/smt2/rec__limit3.smt2 [2018-06-22 12:17:27,643 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 [2018-06-22 12:17:27,726 INFO ]: Executing SMT file /storage/chc-comp/llreve-bench/smt2/rec__limit3.smt2 unknown de.uni_freiburg.informatik.ultimate.plugins.generator.treeautomizer.parsing.HornClauseParserScript$1@49d59bf3 [2018-06-22 12:17:27,949 INFO ]: Succesfully executed SMT file /storage/chc-comp/llreve-bench/smt2/rec__limit3.smt2 [2018-06-22 12:17:27,953 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 12:17:27,964 INFO ]: Walking toolchain with 4 elements. [2018-06-22 12:17:27,964 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 12:17:27,964 INFO ]: Initializing ChcToBoogie... [2018-06-22 12:17:27,964 INFO ]: ChcToBoogie initialized [2018-06-22 12:17:27,968 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 12:17:27" (1/1) ... [2018-06-22 12:17:28,014 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:17:28 Unit [2018-06-22 12:17:28,014 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 12:17:28,015 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 12:17:28,015 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 12:17:28,015 INFO ]: Boogie Preprocessor initialized [2018-06-22 12:17:28,035 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:17:28" (1/1) ... [2018-06-22 12:17:28,035 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:17:28" (1/1) ... [2018-06-22 12:17:28,043 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:17:28" (1/1) ... [2018-06-22 12:17:28,043 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:17:28" (1/1) ... [2018-06-22 12:17:28,048 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:17:28" (1/1) ... [2018-06-22 12:17:28,051 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:17:28" (1/1) ... [2018-06-22 12:17:28,052 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:17:28" (1/1) ... [2018-06-22 12:17:28,055 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 12:17:28,056 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 12:17:28,056 INFO ]: Initializing RCFGBuilder... [2018-06-22 12:17:28,056 INFO ]: RCFGBuilder initialized [2018-06-22 12:17:28,056 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:17:28" (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) [2018-06-22 12:17:28,072 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 12:17:28,072 INFO ]: Found specification of procedure False [2018-06-22 12:17:28,072 INFO ]: Found implementation of procedure False [2018-06-22 12:17:28,072 INFO ]: Specification and implementation of procedure INV_REC_f__2 given in one single declaration [2018-06-22 12:17:28,073 INFO ]: Found specification of procedure INV_REC_f__2 [2018-06-22 12:17:28,073 INFO ]: Found implementation of procedure INV_REC_f__2 [2018-06-22 12:17:28,073 INFO ]: Specification and implementation of procedure INV_REC_f__2_PRE given in one single declaration [2018-06-22 12:17:28,073 INFO ]: Found specification of procedure INV_REC_f__2_PRE [2018-06-22 12:17:28,073 INFO ]: Found implementation of procedure INV_REC_f__2_PRE [2018-06-22 12:17:28,073 INFO ]: Specification and implementation of procedure INV_REC_f^f_PRE given in one single declaration [2018-06-22 12:17:28,073 INFO ]: Found specification of procedure INV_REC_f^f_PRE [2018-06-22 12:17:28,073 INFO ]: Found implementation of procedure INV_REC_f^f_PRE [2018-06-22 12:17:28,073 INFO ]: Specification and implementation of procedure INV_REC_f__1 given in one single declaration [2018-06-22 12:17:28,073 INFO ]: Found specification of procedure INV_REC_f__1 [2018-06-22 12:17:28,073 INFO ]: Found implementation of procedure INV_REC_f__1 [2018-06-22 12:17:28,073 INFO ]: Specification and implementation of procedure INV_REC_f__1_PRE given in one single declaration [2018-06-22 12:17:28,073 INFO ]: Found specification of procedure INV_REC_f__1_PRE [2018-06-22 12:17:28,073 INFO ]: Found implementation of procedure INV_REC_f__1_PRE [2018-06-22 12:17:28,073 INFO ]: Specification and implementation of procedure INV_REC_f^f given in one single declaration [2018-06-22 12:17:28,073 INFO ]: Found specification of procedure INV_REC_f^f [2018-06-22 12:17:28,073 INFO ]: Found implementation of procedure INV_REC_f^f [2018-06-22 12:17:28,073 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 12:17:28,073 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 12:17:28,073 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 [2018-06-22 12:17:28,498 INFO ]: Using library mode [2018-06-22 12:17:28,499 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 12:17:28 BoogieIcfgContainer [2018-06-22 12:17:28,499 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 12:17:28,500 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 12:17:28,500 INFO ]: Initializing TraceAbstraction... [2018-06-22 12:17:28,503 INFO ]: TraceAbstraction initialized [2018-06-22 12:17:28,503 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 12:17:27" (1/3) ... [2018-06-22 12:17:28,504 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@453b5841 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 12:17:28, skipping insertion in model container [2018-06-22 12:17:28,504 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:17:28" (2/3) ... [2018-06-22 12:17:28,504 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@453b5841 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 12:17:28, skipping insertion in model container [2018-06-22 12:17:28,504 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 12:17:28" (3/3) ... [2018-06-22 12:17:28,506 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 12:17:28,524 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 12:17:28,532 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 12:17:28,580 INFO ]: Using default assertion order modulation [2018-06-22 12:17:28,581 INFO ]: Interprodecural is true [2018-06-22 12:17:28,581 INFO ]: Hoare is false [2018-06-22 12:17:28,581 INFO ]: Compute interpolants for FPandBP [2018-06-22 12:17:28,581 INFO ]: Backedges is TWOTRACK [2018-06-22 12:17:28,581 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 12:17:28,581 INFO ]: Difference is false [2018-06-22 12:17:28,581 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 12:17:28,581 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 12:17:28,595 INFO ]: Start isEmpty. Operand 47 states. [2018-06-22 12:17:28,607 INFO ]: Finished isEmpty. Found accepting run of length 6 [2018-06-22 12:17:28,607 INFO ]: Found error trace [2018-06-22 12:17:28,608 INFO ]: trace histogram [1, 1, 1, 1, 1] [2018-06-22 12:17:28,608 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:17:28,613 INFO ]: Analyzing trace with hash 130004611, now seen corresponding path program 1 times [2018-06-22 12:17:28,615 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:17:28,615 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:17:28,650 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:17:28,651 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:17:28,651 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:17:28,663 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:17:28,683 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 12:17:28,685 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 12:17:28,686 INFO ]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-06-22 12:17:28,687 INFO ]: Interpolant automaton has 2 states [2018-06-22 12:17:28,702 INFO ]: Constructing interpolant automaton starting with 2 interpolants. [2018-06-22 12:17:28,704 INFO ]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-06-22 12:17:28,706 INFO ]: Start difference. First operand 47 states. Second operand 2 states. [2018-06-22 12:17:28,738 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 12:17:28,739 INFO ]: Finished difference Result 43 states and 63 transitions. [2018-06-22 12:17:28,739 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-06-22 12:17:28,740 INFO ]: Start accepts. Automaton has 2 states. Word has length 5 [2018-06-22 12:17:28,741 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 12:17:28,756 INFO ]: With dead ends: 43 [2018-06-22 12:17:28,756 INFO ]: Without dead ends: 43 [2018-06-22 12:17:28,758 INFO ]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-06-22 12:17:28,771 INFO ]: Start minimizeSevpa. Operand 43 states. [2018-06-22 12:17:28,793 INFO ]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-06-22 12:17:28,794 INFO ]: Start removeUnreachable. Operand 43 states. [2018-06-22 12:17:28,796 INFO ]: Finished removeUnreachable. Reduced from 43 states to 43 states and 63 transitions. [2018-06-22 12:17:28,797 INFO ]: Start accepts. Automaton has 43 states and 63 transitions. Word has length 5 [2018-06-22 12:17:28,797 INFO ]: Finished accepts. word is rejected. [2018-06-22 12:17:28,797 INFO ]: Abstraction has 43 states and 63 transitions. [2018-06-22 12:17:28,797 INFO ]: Interpolant automaton has 2 states. [2018-06-22 12:17:28,797 INFO ]: Start isEmpty. Operand 43 states and 63 transitions. [2018-06-22 12:17:28,799 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 12:17:28,799 INFO ]: Found error trace [2018-06-22 12:17:28,799 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 12:17:28,799 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:17:28,799 INFO ]: Analyzing trace with hash 1130571507, now seen corresponding path program 1 times [2018-06-22 12:17:28,800 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:17:28,800 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:17:28,801 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:17:28,801 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:17:28,801 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:17:28,829 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:17:29,886 WARN ]: Spent 962.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2018-06-22 12:17:29,953 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 12:17:29,953 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 12:17:29,953 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 12:17:29,954 INFO ]: Interpolant automaton has 4 states [2018-06-22 12:17:29,955 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 12:17:29,955 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 12:17:29,955 INFO ]: Start difference. First operand 43 states and 63 transitions. Second operand 4 states. [2018-06-22 12:17:30,095 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 12:17:30,095 INFO ]: Finished difference Result 45 states and 65 transitions. [2018-06-22 12:17:30,097 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 12:17:30,097 INFO ]: Start accepts. Automaton has 4 states. Word has length 13 [2018-06-22 12:17:30,097 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 12:17:30,099 INFO ]: With dead ends: 45 [2018-06-22 12:17:30,099 INFO ]: Without dead ends: 45 [2018-06-22 12:17:30,099 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 12:17:30,100 INFO ]: Start minimizeSevpa. Operand 45 states. [2018-06-22 12:17:30,119 INFO ]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-06-22 12:17:30,119 INFO ]: Start removeUnreachable. Operand 45 states. [2018-06-22 12:17:30,125 INFO ]: Finished removeUnreachable. Reduced from 45 states to 45 states and 65 transitions. [2018-06-22 12:17:30,125 INFO ]: Start accepts. Automaton has 45 states and 65 transitions. Word has length 13 [2018-06-22 12:17:30,126 INFO ]: Finished accepts. word is rejected. [2018-06-22 12:17:30,126 INFO ]: Abstraction has 45 states and 65 transitions. [2018-06-22 12:17:30,126 INFO ]: Interpolant automaton has 4 states. [2018-06-22 12:17:30,126 INFO ]: Start isEmpty. Operand 45 states and 65 transitions. [2018-06-22 12:17:30,128 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 12:17:30,128 INFO ]: Found error trace [2018-06-22 12:17:30,130 INFO ]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 12:17:30,130 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:17:30,130 INFO ]: Analyzing trace with hash -1951621033, now seen corresponding path program 1 times [2018-06-22 12:17:30,130 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:17:30,130 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:17:30,131 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:17:30,131 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:17:30,131 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:17:30,160 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:17:30,520 WARN ]: Spent 253.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 25 [2018-06-22 12:17:30,749 INFO ]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-06-22 12:17:30,749 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 12:17:30,749 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 [2018-06-22 12:17:30,760 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:17:30,804 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:17:30,813 INFO ]: Computing forward predicates... [2018-06-22 12:17:31,246 WARN ]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2018-06-22 12:17:31,509 WARN ]: Spent 180.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 14 [2018-06-22 12:17:31,529 INFO ]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-06-22 12:17:31,563 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 12:17:31,563 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2018-06-22 12:17:31,563 INFO ]: Interpolant automaton has 10 states [2018-06-22 12:17:31,563 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-22 12:17:31,563 INFO ]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-06-22 12:17:31,563 INFO ]: Start difference. First operand 45 states and 65 transitions. Second operand 10 states. [2018-06-22 12:17:32,171 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 12:17:32,171 INFO ]: Finished difference Result 49 states and 70 transitions. [2018-06-22 12:17:32,171 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 12:17:32,171 INFO ]: Start accepts. Automaton has 10 states. Word has length 21 [2018-06-22 12:17:32,171 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 12:17:32,173 INFO ]: With dead ends: 49 [2018-06-22 12:17:32,173 INFO ]: Without dead ends: 49 [2018-06-22 12:17:32,173 INFO ]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-06-22 12:17:32,173 INFO ]: Start minimizeSevpa. Operand 49 states. [2018-06-22 12:17:32,181 INFO ]: Finished minimizeSevpa. Reduced states from 49 to 47. [2018-06-22 12:17:32,181 INFO ]: Start removeUnreachable. Operand 47 states. [2018-06-22 12:17:32,182 INFO ]: Finished removeUnreachable. Reduced from 47 states to 47 states and 67 transitions. [2018-06-22 12:17:32,182 INFO ]: Start accepts. Automaton has 47 states and 67 transitions. Word has length 21 [2018-06-22 12:17:32,183 INFO ]: Finished accepts. word is rejected. [2018-06-22 12:17:32,183 INFO ]: Abstraction has 47 states and 67 transitions. [2018-06-22 12:17:32,183 INFO ]: Interpolant automaton has 10 states. [2018-06-22 12:17:32,183 INFO ]: Start isEmpty. Operand 47 states and 67 transitions. [2018-06-22 12:17:32,184 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 12:17:32,184 INFO ]: Found error trace [2018-06-22 12:17:32,185 INFO ]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 12:17:32,185 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:17:32,185 INFO ]: Analyzing trace with hash -1273618245, now seen corresponding path program 2 times [2018-06-22 12:17:32,185 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:17:32,185 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:17:32,186 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:17:32,186 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:17:32,186 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:17:32,208 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:17:32,573 WARN ]: Spent 280.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 25 [2018-06-22 12:17:32,672 INFO ]: Checked inductivity of 20 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-06-22 12:17:32,672 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 12:17:32,672 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 [2018-06-22 12:17:32,680 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 12:17:32,714 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 12:17:32,715 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:17:32,718 INFO ]: Computing forward predicates... [2018-06-22 12:17:33,018 INFO ]: Checked inductivity of 20 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-06-22 12:17:33,049 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 12:17:33,049 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2018-06-22 12:17:33,049 INFO ]: Interpolant automaton has 16 states [2018-06-22 12:17:33,049 INFO ]: Constructing interpolant automaton starting with 16 interpolants. [2018-06-22 12:17:33,049 INFO ]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2018-06-22 12:17:33,049 INFO ]: Start difference. First operand 47 states and 67 transitions. Second operand 16 states. [2018-06-22 12:17:33,472 WARN ]: Spent 131.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2018-06-22 12:17:33,767 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 12:17:33,767 INFO ]: Finished difference Result 59 states and 86 transitions. [2018-06-22 12:17:33,770 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-22 12:17:33,770 INFO ]: Start accepts. Automaton has 16 states. Word has length 29 [2018-06-22 12:17:33,770 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 12:17:33,772 INFO ]: With dead ends: 59 [2018-06-22 12:17:33,772 INFO ]: Without dead ends: 53 [2018-06-22 12:17:33,772 INFO ]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2018-06-22 12:17:33,773 INFO ]: Start minimizeSevpa. Operand 53 states. [2018-06-22 12:17:33,792 INFO ]: Finished minimizeSevpa. Reduced states from 53 to 51. [2018-06-22 12:17:33,792 INFO ]: Start removeUnreachable. Operand 51 states. [2018-06-22 12:17:33,794 INFO ]: Finished removeUnreachable. Reduced from 51 states to 51 states and 76 transitions. [2018-06-22 12:17:33,794 INFO ]: Start accepts. Automaton has 51 states and 76 transitions. Word has length 29 [2018-06-22 12:17:33,794 INFO ]: Finished accepts. word is rejected. [2018-06-22 12:17:33,794 INFO ]: Abstraction has 51 states and 76 transitions. [2018-06-22 12:17:33,794 INFO ]: Interpolant automaton has 16 states. [2018-06-22 12:17:33,794 INFO ]: Start isEmpty. Operand 51 states and 76 transitions. [2018-06-22 12:17:33,801 INFO ]: Finished isEmpty. Found accepting run of length 42 [2018-06-22 12:17:33,801 INFO ]: Found error trace [2018-06-22 12:17:33,801 INFO ]: trace histogram [5, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 12:17:33,801 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:17:33,801 INFO ]: Analyzing trace with hash 26523491, now seen corresponding path program 1 times [2018-06-22 12:17:33,801 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:17:33,801 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:17:33,802 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:17:33,802 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 12:17:33,802 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:17:33,852 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:17:34,260 INFO ]: Checked inductivity of 54 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2018-06-22 12:17:34,260 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 12:17:34,260 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 [2018-06-22 12:17:34,268 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:17:34,292 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:17:34,295 INFO ]: Computing forward predicates... [2018-06-22 12:17:34,598 INFO ]: Checked inductivity of 54 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2018-06-22 12:17:34,638 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 12:17:34,638 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2018-06-22 12:17:34,638 INFO ]: Interpolant automaton has 16 states [2018-06-22 12:17:34,638 INFO ]: Constructing interpolant automaton starting with 16 interpolants. [2018-06-22 12:17:34,638 INFO ]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2018-06-22 12:17:34,639 INFO ]: Start difference. First operand 51 states and 76 transitions. Second operand 16 states. [2018-06-22 12:17:34,827 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 12:17:34,827 INFO ]: Finished difference Result 55 states and 81 transitions. [2018-06-22 12:17:34,829 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 12:17:34,829 INFO ]: Start accepts. Automaton has 16 states. Word has length 41 [2018-06-22 12:17:34,830 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 12:17:34,831 INFO ]: With dead ends: 55 [2018-06-22 12:17:34,831 INFO ]: Without dead ends: 55 [2018-06-22 12:17:34,831 INFO ]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2018-06-22 12:17:34,832 INFO ]: Start minimizeSevpa. Operand 55 states. [2018-06-22 12:17:34,841 INFO ]: Finished minimizeSevpa. Reduced states from 55 to 53. [2018-06-22 12:17:34,841 INFO ]: Start removeUnreachable. Operand 53 states. [2018-06-22 12:17:34,842 INFO ]: Finished removeUnreachable. Reduced from 53 states to 53 states and 78 transitions. [2018-06-22 12:17:34,842 INFO ]: Start accepts. Automaton has 53 states and 78 transitions. Word has length 41 [2018-06-22 12:17:34,843 INFO ]: Finished accepts. word is rejected. [2018-06-22 12:17:34,843 INFO ]: Abstraction has 53 states and 78 transitions. [2018-06-22 12:17:34,843 INFO ]: Interpolant automaton has 16 states. [2018-06-22 12:17:34,843 INFO ]: Start isEmpty. Operand 53 states and 78 transitions. [2018-06-22 12:17:34,845 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 12:17:34,845 INFO ]: Found error trace [2018-06-22 12:17:34,845 INFO ]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 12:17:34,845 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:17:34,845 INFO ]: Analyzing trace with hash -160484553, now seen corresponding path program 1 times [2018-06-22 12:17:34,845 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:17:34,845 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:17:34,846 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:17:34,846 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:17:34,846 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:17:34,857 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:17:34,900 INFO ]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 12:17:34,900 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 12:17:34,900 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 12:17:34,901 INFO ]: Interpolant automaton has 4 states [2018-06-22 12:17:34,901 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 12:17:34,901 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 12:17:34,901 INFO ]: Start difference. First operand 53 states and 78 transitions. Second operand 4 states. [2018-06-22 12:17:34,916 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 12:17:34,916 INFO ]: Finished difference Result 55 states and 80 transitions. [2018-06-22 12:17:34,916 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 12:17:34,917 INFO ]: Start accepts. Automaton has 4 states. Word has length 25 [2018-06-22 12:17:34,917 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 12:17:34,918 INFO ]: With dead ends: 55 [2018-06-22 12:17:34,918 INFO ]: Without dead ends: 40 [2018-06-22 12:17:34,919 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 12:17:34,920 INFO ]: Start minimizeSevpa. Operand 40 states. [2018-06-22 12:17:34,924 INFO ]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-06-22 12:17:34,924 INFO ]: Start removeUnreachable. Operand 40 states. [2018-06-22 12:17:34,925 INFO ]: Finished removeUnreachable. Reduced from 40 states to 40 states and 55 transitions. [2018-06-22 12:17:34,925 INFO ]: Start accepts. Automaton has 40 states and 55 transitions. Word has length 25 [2018-06-22 12:17:34,926 INFO ]: Finished accepts. word is rejected. [2018-06-22 12:17:34,926 INFO ]: Abstraction has 40 states and 55 transitions. [2018-06-22 12:17:34,926 INFO ]: Interpolant automaton has 4 states. [2018-06-22 12:17:34,926 INFO ]: Start isEmpty. Operand 40 states and 55 transitions. [2018-06-22 12:17:34,927 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 12:17:34,927 INFO ]: Found error trace [2018-06-22 12:17:34,927 INFO ]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 12:17:34,927 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:17:34,927 INFO ]: Analyzing trace with hash 386276036, now seen corresponding path program 1 times [2018-06-22 12:17:34,927 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:17:34,927 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:17:34,928 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:17:34,928 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:17:34,928 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:17:34,934 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:17:34,982 INFO ]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 12:17:34,982 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 12:17:34,982 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 12:17:34,982 INFO ]: Interpolant automaton has 4 states [2018-06-22 12:17:34,983 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 12:17:34,983 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 12:17:34,983 INFO ]: Start difference. First operand 40 states and 55 transitions. Second operand 4 states. [2018-06-22 12:17:34,997 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 12:17:34,998 INFO ]: Finished difference Result 42 states and 57 transitions. [2018-06-22 12:17:34,998 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 12:17:34,998 INFO ]: Start accepts. Automaton has 4 states. Word has length 25 [2018-06-22 12:17:34,998 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 12:17:34,999 INFO ]: With dead ends: 42 [2018-06-22 12:17:34,999 INFO ]: Without dead ends: 27 [2018-06-22 12:17:34,999 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 12:17:34,999 INFO ]: Start minimizeSevpa. Operand 27 states. [2018-06-22 12:17:35,005 INFO ]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-06-22 12:17:35,006 INFO ]: Start removeUnreachable. Operand 27 states. [2018-06-22 12:17:35,006 INFO ]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2018-06-22 12:17:35,006 INFO ]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 25 [2018-06-22 12:17:35,006 INFO ]: Finished accepts. word is rejected. [2018-06-22 12:17:35,006 INFO ]: Abstraction has 27 states and 32 transitions. [2018-06-22 12:17:35,006 INFO ]: Interpolant automaton has 4 states. [2018-06-22 12:17:35,007 INFO ]: Start isEmpty. Operand 27 states and 32 transitions. [2018-06-22 12:17:35,008 INFO ]: Finished isEmpty. Found accepting run of length 50 [2018-06-22 12:17:35,008 INFO ]: Found error trace [2018-06-22 12:17:35,008 INFO ]: trace histogram [6, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 12:17:35,008 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:17:35,008 INFO ]: Analyzing trace with hash 811904199, now seen corresponding path program 2 times [2018-06-22 12:17:35,008 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:17:35,009 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:17:35,009 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:17:35,009 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:17:35,009 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:17:35,029 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:17:35,268 INFO ]: Checked inductivity of 87 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-06-22 12:17:35,268 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 12:17:35,268 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 [2018-06-22 12:17:35,274 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 12:17:35,295 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 12:17:35,295 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:17:35,300 INFO ]: Computing forward predicates... [2018-06-22 12:17:36,630 INFO ]: Checked inductivity of 87 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-06-22 12:17:36,685 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 12:17:36,685 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2018-06-22 12:17:36,686 INFO ]: Interpolant automaton has 18 states [2018-06-22 12:17:36,686 INFO ]: Constructing interpolant automaton starting with 18 interpolants. [2018-06-22 12:17:36,686 INFO ]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2018-06-22 12:17:36,686 INFO ]: Start difference. First operand 27 states and 32 transitions. Second operand 18 states. [2018-06-22 12:17:37,326 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 12:17:37,326 INFO ]: Finished difference Result 25 states and 30 transitions. [2018-06-22 12:17:37,328 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 12:17:37,328 INFO ]: Start accepts. Automaton has 18 states. Word has length 49 [2018-06-22 12:17:37,328 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 12:17:37,328 INFO ]: With dead ends: 25 [2018-06-22 12:17:37,328 INFO ]: Without dead ends: 0 [2018-06-22 12:17:37,329 INFO ]: 0 DeclaredPredicates, 65 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2018-06-22 12:17:37,329 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-22 12:17:37,329 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-22 12:17:37,329 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-22 12:17:37,329 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-22 12:17:37,329 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 49 [2018-06-22 12:17:37,329 INFO ]: Finished accepts. word is rejected. [2018-06-22 12:17:37,329 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-22 12:17:37,329 INFO ]: Interpolant automaton has 18 states. [2018-06-22 12:17:37,329 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-22 12:17:37,329 INFO ]: Finished isEmpty. No accepting run. [2018-06-22 12:17:37,333 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 12:17:37 BoogieIcfgContainer [2018-06-22 12:17:37,333 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 12:17:37,334 INFO ]: Toolchain (without parser) took 9380.53 ms. Allocated memory was 304.1 MB in the beginning and 378.0 MB in the end (delta: 73.9 MB). Free memory was 258.5 MB in the beginning and 244.7 MB in the end (delta: 13.8 MB). Peak memory consumption was 87.7 MB. Max. memory is 3.6 GB. [2018-06-22 12:17:37,335 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 304.1 MB. Free memory is still 269.6 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 12:17:37,335 INFO ]: ChcToBoogie took 50.22 ms. Allocated memory is still 304.1 MB. Free memory was 258.5 MB in the beginning and 256.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 12:17:37,336 INFO ]: Boogie Preprocessor took 40.40 ms. Allocated memory is still 304.1 MB. Free memory was 256.5 MB in the beginning and 255.4 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 3.6 GB. [2018-06-22 12:17:37,336 INFO ]: RCFGBuilder took 443.20 ms. Allocated memory is still 304.1 MB. Free memory was 255.4 MB in the beginning and 243.4 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 3.6 GB. [2018-06-22 12:17:37,337 INFO ]: TraceAbstraction took 8833.20 ms. Allocated memory was 304.1 MB in the beginning and 378.0 MB in the end (delta: 73.9 MB). Free memory was 242.4 MB in the beginning and 244.7 MB in the end (delta: -2.3 MB). Peak memory consumption was 71.6 MB. Max. memory is 3.6 GB. [2018-06-22 12:17:37,340 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * 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 269.6 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 50.22 ms. Allocated memory is still 304.1 MB. Free memory was 258.5 MB in the beginning and 256.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 40.40 ms. Allocated memory is still 304.1 MB. Free memory was 256.5 MB in the beginning and 255.4 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 3.6 GB. * RCFGBuilder took 443.20 ms. Allocated memory is still 304.1 MB. Free memory was 255.4 MB in the beginning and 243.4 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 8833.20 ms. Allocated memory was 304.1 MB in the beginning and 378.0 MB in the end (delta: 73.9 MB). Free memory was 242.4 MB in the beginning and 244.7 MB in the end (delta: -2.3 MB). Peak memory consumption was 71.6 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 8 procedures, 47 locations, 1 error locations. SAFE Result, 8.7s OverallTime, 8 OverallIterations, 6 TraceHistogramMax, 2.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 442 SDtfs, 27 SDslu, 2009 SDs, 0 SdLazy, 499 SolverSat, 21 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 200 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 5.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=53occurred in iteration=5, 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, 8 MinimizatonAttempts, 6 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 5.6s InterpolantComputationTime, 348 NumberOfCodeBlocks, 348 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 336 ConstructedInterpolants, 8 QuantifiedInterpolants, 144744 SizeOfPredicates, 41 NumberOfNonLiveVariables, 556 ConjunctsInSsa, 191 ConjunctsInUnsatCore, 12 InterpolantComputations, 4 PerfectInterpolantSequences, 248/340 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/rec__limit3.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_12-17-37-349.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/rec__limit3.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_12-17-37-349.csv Received shutdown request...