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/vmt-chc-benchmarks/cav12/array_max-4.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 13:56:00,741 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 13:56:00,744 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 13:56:00,758 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 13:56:00,758 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 13:56:00,759 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 13:56:00,762 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 13:56:00,764 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 13:56:00,765 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 13:56:00,767 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 13:56:00,768 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 13:56:00,768 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 13:56:00,769 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 13:56:00,773 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 13:56:00,774 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 13:56:00,774 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 13:56:00,783 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 13:56:00,785 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 13:56:00,786 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 13:56:00,787 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 13:56:00,790 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 13:56:00,792 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 13:56:00,792 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 13:56:00,792 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 13:56:00,793 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 13:56:00,796 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 13:56:00,796 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 13:56:00,797 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 13:56:00,798 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 13:56:00,798 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 13:56:00,799 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 13:56:00,799 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 13:56:00,799 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 13:56:00,804 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 13:56:00,805 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 13:56:00,806 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 13:56:00,822 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 13:56:00,822 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 13:56:00,823 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 13:56:00,823 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 13:56:00,824 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 13:56:00,824 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 13:56:00,824 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 13:56:00,825 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 13:56:00,826 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 13:56:00,826 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 13:56:00,826 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 13:56:00,826 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 13:56:00,826 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 13:56:00,826 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 13:56:00,827 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 13:56:00,827 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 13:56:00,827 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 13:56:00,827 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 13:56:00,827 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 13:56:00,829 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 13:56:00,830 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 13:56:00,867 INFO ]: Repository-Root is: /tmp [2018-06-22 13:56:00,884 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 13:56:00,890 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 13:56:00,891 INFO ]: Initializing SmtParser... [2018-06-22 13:56:00,892 INFO ]: SmtParser initialized [2018-06-22 13:56:00,892 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/cav12/array_max-4.smt2 [2018-06-22 13:56:00,894 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 13:56:00,973 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/array_max-4.smt2 unknown [2018-06-22 13:56:01,405 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/array_max-4.smt2 [2018-06-22 13:56:01,410 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 13:56:01,416 INFO ]: Walking toolchain with 4 elements. [2018-06-22 13:56:01,417 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 13:56:01,417 INFO ]: Initializing ChcToBoogie... [2018-06-22 13:56:01,417 INFO ]: ChcToBoogie initialized [2018-06-22 13:56:01,420 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 01:56:01" (1/1) ... [2018-06-22 13:56:01,471 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:56:01 Unit [2018-06-22 13:56:01,471 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 13:56:01,471 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 13:56:01,471 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 13:56:01,471 INFO ]: Boogie Preprocessor initialized [2018-06-22 13:56:01,493 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:56:01" (1/1) ... [2018-06-22 13:56:01,493 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:56:01" (1/1) ... [2018-06-22 13:56:01,505 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:56:01" (1/1) ... [2018-06-22 13:56:01,506 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:56:01" (1/1) ... [2018-06-22 13:56:01,520 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:56:01" (1/1) ... [2018-06-22 13:56:01,521 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:56:01" (1/1) ... [2018-06-22 13:56:01,525 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:56:01" (1/1) ... [2018-06-22 13:56:01,530 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 13:56:01,530 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 13:56:01,530 INFO ]: Initializing RCFGBuilder... [2018-06-22 13:56:01,530 INFO ]: RCFGBuilder initialized [2018-06-22 13:56:01,531 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:56:01" (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 13:56:01,578 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 13:56:01,578 INFO ]: Found specification of procedure False [2018-06-22 13:56:01,578 INFO ]: Found implementation of procedure False [2018-06-22 13:56:01,578 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 13:56:01,578 INFO ]: Found specification of procedure state [2018-06-22 13:56:01,578 INFO ]: Found implementation of procedure state [2018-06-22 13:56:01,578 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 13:56:01,578 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 13:56:01,578 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 13:56:01,985 INFO ]: Using library mode [2018-06-22 13:56:01,986 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 01:56:01 BoogieIcfgContainer [2018-06-22 13:56:01,986 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 13:56:01,988 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 13:56:01,988 INFO ]: Initializing TraceAbstraction... [2018-06-22 13:56:01,993 INFO ]: TraceAbstraction initialized [2018-06-22 13:56:01,993 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 01:56:01" (1/3) ... [2018-06-22 13:56:01,994 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49dfdb3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 01:56:01, skipping insertion in model container [2018-06-22 13:56:01,994 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:56:01" (2/3) ... [2018-06-22 13:56:01,994 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49dfdb3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 01:56:01, skipping insertion in model container [2018-06-22 13:56:01,995 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 01:56:01" (3/3) ... [2018-06-22 13:56:01,996 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 13:56:02,006 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 13:56:02,016 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 13:56:02,065 INFO ]: Using default assertion order modulation [2018-06-22 13:56:02,065 INFO ]: Interprodecural is true [2018-06-22 13:56:02,065 INFO ]: Hoare is false [2018-06-22 13:56:02,065 INFO ]: Compute interpolants for FPandBP [2018-06-22 13:56:02,065 INFO ]: Backedges is TWOTRACK [2018-06-22 13:56:02,065 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 13:56:02,065 INFO ]: Difference is false [2018-06-22 13:56:02,065 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 13:56:02,065 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 13:56:02,086 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 13:56:02,096 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 13:56:02,096 INFO ]: Found error trace [2018-06-22 13:56:02,097 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 13:56:02,097 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 13:56:02,102 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-22 13:56:02,103 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 13:56:02,103 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 13:56:02,139 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 13:56:02,139 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 13:56:02,139 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 13:56:02,186 INFO ]: Conjunction of SSA is unsat [2018-06-22 13:56:02,303 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 13:56:02,306 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 13:56:02,306 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 13:56:02,307 INFO ]: Interpolant automaton has 4 states [2018-06-22 13:56:02,320 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 13:56:02,320 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 13:56:02,322 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 13:56:02,448 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 13:56:02,448 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 13:56:02,449 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 13:56:02,450 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 13:56:02,450 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 13:56:02,460 INFO ]: With dead ends: 13 [2018-06-22 13:56:02,460 INFO ]: Without dead ends: 13 [2018-06-22 13:56:02,462 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 13:56:02,480 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 13:56:02,499 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 13:56:02,500 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 13:56:02,501 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 13:56:02,502 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 13:56:02,503 INFO ]: Finished accepts. word is rejected. [2018-06-22 13:56:02,503 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 13:56:02,503 INFO ]: Interpolant automaton has 4 states. [2018-06-22 13:56:02,503 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 13:56:02,504 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 13:56:02,504 INFO ]: Found error trace [2018-06-22 13:56:02,504 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 13:56:02,504 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 13:56:02,504 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-22 13:56:02,504 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 13:56:02,505 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 13:56:02,507 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 13:56:02,507 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 13:56:02,507 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 13:56:02,691 INFO ]: Conjunction of SSA is unsat [2018-06-22 13:56:03,237 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 13:56:03,237 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 13:56:03,237 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 13:56:03,245 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 13:56:03,313 INFO ]: Conjunction of SSA is unsat [2018-06-22 13:56:03,324 INFO ]: Computing forward predicates... [2018-06-22 13:56:04,495 WARN ]: Spent 378.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 15 [2018-06-22 13:56:04,707 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 13:56:04,729 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 13:56:04,729 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-06-22 13:56:04,729 INFO ]: Interpolant automaton has 9 states [2018-06-22 13:56:04,729 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 13:56:04,730 INFO ]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2018-06-22 13:56:04,730 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 9 states. [2018-06-22 13:56:05,220 WARN ]: Spent 322.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 12 [2018-06-22 13:56:05,269 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 13:56:05,270 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 13:56:05,273 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 13:56:05,273 INFO ]: Start accepts. Automaton has 9 states. Word has length 13 [2018-06-22 13:56:05,273 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 13:56:05,273 INFO ]: With dead ends: 15 [2018-06-22 13:56:05,273 INFO ]: Without dead ends: 15 [2018-06-22 13:56:05,274 INFO ]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2018-06-22 13:56:05,274 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 13:56:05,276 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 13:56:05,276 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 13:56:05,279 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 13:56:05,279 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 13:56:05,279 INFO ]: Finished accepts. word is rejected. [2018-06-22 13:56:05,279 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 13:56:05,279 INFO ]: Interpolant automaton has 9 states. [2018-06-22 13:56:05,279 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 13:56:05,280 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 13:56:05,280 INFO ]: Found error trace [2018-06-22 13:56:05,280 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 13:56:05,280 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 13:56:05,280 INFO ]: Analyzing trace with hash -1486246934, now seen corresponding path program 2 times [2018-06-22 13:56:05,280 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 13:56:05,280 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 13:56:05,281 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 13:56:05,281 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 13:56:05,281 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 13:56:05,428 INFO ]: Conjunction of SSA is unsat [2018-06-22 13:56:05,815 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 13:56:05,815 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 13:56:05,815 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 13:56:05,823 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 13:56:05,910 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 13:56:05,910 INFO ]: Conjunction of SSA is unsat [2018-06-22 13:56:05,918 INFO ]: Computing forward predicates... [2018-06-22 13:56:07,233 WARN ]: Spent 179.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2018-06-22 13:56:07,407 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 13:56:07,442 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 13:56:07,442 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2018-06-22 13:56:07,442 INFO ]: Interpolant automaton has 13 states [2018-06-22 13:56:07,442 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-22 13:56:07,443 INFO ]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2018-06-22 13:56:07,443 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 13 states. [2018-06-22 13:56:07,783 WARN ]: Spent 272.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2018-06-22 13:56:07,948 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 13:56:07,948 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 13:56:07,949 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 13:56:07,949 INFO ]: Start accepts. Automaton has 13 states. Word has length 17 [2018-06-22 13:56:07,949 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 13:56:07,949 INFO ]: With dead ends: 17 [2018-06-22 13:56:07,949 INFO ]: Without dead ends: 17 [2018-06-22 13:56:07,950 INFO ]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2018-06-22 13:56:07,950 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 13:56:07,953 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 13:56:07,953 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 13:56:07,953 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 13:56:07,954 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 13:56:07,954 INFO ]: Finished accepts. word is rejected. [2018-06-22 13:56:07,954 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 13:56:07,954 INFO ]: Interpolant automaton has 13 states. [2018-06-22 13:56:07,954 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 13:56:07,954 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 13:56:07,954 INFO ]: Found error trace [2018-06-22 13:56:07,954 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 13:56:07,954 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 13:56:07,955 INFO ]: Analyzing trace with hash -2056434034, now seen corresponding path program 3 times [2018-06-22 13:56:07,955 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 13:56:07,955 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 13:56:07,955 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 13:56:07,955 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 13:56:07,955 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 13:56:08,067 INFO ]: Conjunction of SSA is unsat [2018-06-22 13:56:08,820 WARN ]: Spent 430.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 10 [2018-06-22 13:56:09,150 WARN ]: Spent 256.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 16 [2018-06-22 13:56:09,203 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 13:56:09,203 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 13:56:09,203 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 13:56:09,216 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 13:56:09,326 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 13:56:09,326 INFO ]: Conjunction of SSA is unsat [2018-06-22 13:56:09,335 INFO ]: Computing forward predicates... [2018-06-22 13:56:10,432 WARN ]: Spent 346.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2018-06-22 13:56:13,067 WARN ]: Spent 2.17 s on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2018-06-22 13:56:13,282 INFO ]: Checked inductivity of 21 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 13:56:13,307 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 13:56:13,307 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2018-06-22 13:56:13,307 INFO ]: Interpolant automaton has 16 states [2018-06-22 13:56:13,307 INFO ]: Constructing interpolant automaton starting with 16 interpolants. [2018-06-22 13:56:13,307 INFO ]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2018-06-22 13:56:13,307 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 16 states. [2018-06-22 13:56:14,027 WARN ]: Spent 692.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 100 [2018-06-22 13:56:14,188 WARN ]: Spent 103.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 20 [2018-06-22 13:56:14,553 WARN ]: Spent 339.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 58 [2018-06-22 13:56:14,865 WARN ]: Spent 219.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 69 [2018-06-22 13:56:15,304 WARN ]: Spent 405.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 95 [2018-06-22 13:56:15,355 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 13:56:15,356 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-22 13:56:15,356 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 13:56:15,356 INFO ]: Start accepts. Automaton has 16 states. Word has length 21 [2018-06-22 13:56:15,356 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 13:56:15,357 INFO ]: With dead ends: 21 [2018-06-22 13:56:15,357 INFO ]: Without dead ends: 21 [2018-06-22 13:56:15,357 INFO ]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2018-06-22 13:56:15,357 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-22 13:56:15,362 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-22 13:56:15,362 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-22 13:56:15,363 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-22 13:56:15,363 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 21 [2018-06-22 13:56:15,363 INFO ]: Finished accepts. word is rejected. [2018-06-22 13:56:15,363 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-22 13:56:15,363 INFO ]: Interpolant automaton has 16 states. [2018-06-22 13:56:15,363 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-22 13:56:15,364 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 13:56:15,364 INFO ]: Found error trace [2018-06-22 13:56:15,364 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 13:56:15,364 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 13:56:15,364 INFO ]: Analyzing trace with hash 1986427350, now seen corresponding path program 4 times [2018-06-22 13:56:15,364 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 13:56:15,364 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 13:56:15,365 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 13:56:15,365 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 13:56:15,365 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 13:56:15,664 INFO ]: Conjunction of SSA is unsat [2018-06-22 13:56:16,388 WARN ]: Spent 158.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 30 [2018-06-22 13:56:16,641 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 13:56:16,641 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 13:56:16,641 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 13:56:16,652 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 13:56:16,775 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 13:56:16,775 INFO ]: Conjunction of SSA is unsat [2018-06-22 13:56:16,789 INFO ]: Computing forward predicates... [2018-06-22 13:56:18,498 WARN ]: Spent 1.23 s on a formula simplification. DAG size of input: 140 DAG size of output: 96 [2018-06-22 13:56:20,981 WARN ]: Spent 1.95 s on a formula simplification. DAG size of input: 171 DAG size of output: 139 [2018-06-22 13:56:22,978 WARN ]: Spent 1.30 s on a formula simplification. DAG size of input: 155 DAG size of output: 113 [2018-06-22 13:56:24,391 WARN ]: Spent 1.06 s on a formula simplification. DAG size of input: 169 DAG size of output: 119 [2018-06-22 13:56:24,854 WARN ]: Spent 256.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2018-06-22 13:56:25,110 INFO ]: Checked inductivity of 55 backedges. 1 proven. 39 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 13:56:25,131 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 13:56:25,131 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2018-06-22 13:56:25,132 INFO ]: Interpolant automaton has 24 states [2018-06-22 13:56:25,132 INFO ]: Constructing interpolant automaton starting with 24 interpolants. [2018-06-22 13:56:25,132 INFO ]: CoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2018-06-22 13:56:25,132 INFO ]: Start difference. First operand 21 states and 22 transitions. Second operand 24 states. [2018-06-22 13:56:26,527 WARN ]: Spent 1.35 s on a formula simplification. DAG size of input: 204 DAG size of output: 133 [2018-06-22 13:56:26,819 WARN ]: Spent 220.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 23 [2018-06-22 13:56:27,032 WARN ]: Spent 171.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 28 [2018-06-22 13:56:27,252 WARN ]: Spent 172.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 29 [2018-06-22 13:56:27,479 WARN ]: Spent 168.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 29 [2018-06-22 13:56:28,063 WARN ]: Spent 511.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 115 [2018-06-22 13:56:29,395 WARN ]: Spent 1.08 s on a formula simplification. DAG size of input: 204 DAG size of output: 117 [2018-06-22 13:56:29,439 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 13:56:29,439 INFO ]: Finished difference Result 25 states and 26 transitions. [2018-06-22 13:56:29,440 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-22 13:56:29,440 INFO ]: Start accepts. Automaton has 24 states. Word has length 29 [2018-06-22 13:56:29,440 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 13:56:29,441 INFO ]: With dead ends: 25 [2018-06-22 13:56:29,441 INFO ]: Without dead ends: 25 [2018-06-22 13:56:29,441 INFO ]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=231, Invalid=699, Unknown=0, NotChecked=0, Total=930 [2018-06-22 13:56:29,441 INFO ]: Start minimizeSevpa. Operand 25 states. [2018-06-22 13:56:29,444 INFO ]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-06-22 13:56:29,445 INFO ]: Start removeUnreachable. Operand 25 states. [2018-06-22 13:56:29,445 INFO ]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-06-22 13:56:29,445 INFO ]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 29 [2018-06-22 13:56:29,446 INFO ]: Finished accepts. word is rejected. [2018-06-22 13:56:29,446 INFO ]: Abstraction has 25 states and 26 transitions. [2018-06-22 13:56:29,446 INFO ]: Interpolant automaton has 24 states. [2018-06-22 13:56:29,446 INFO ]: Start isEmpty. Operand 25 states and 26 transitions. [2018-06-22 13:56:29,447 INFO ]: Finished isEmpty. Found accepting run of length 38 [2018-06-22 13:56:29,447 INFO ]: Found error trace [2018-06-22 13:56:29,447 INFO ]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 13:56:29,447 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 13:56:29,447 INFO ]: Analyzing trace with hash -411423458, now seen corresponding path program 5 times [2018-06-22 13:56:29,447 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 13:56:29,447 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 13:56:29,448 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 13:56:29,448 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 13:56:29,448 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 13:56:29,840 INFO ]: Conjunction of SSA is unsat [2018-06-22 13:56:30,773 WARN ]: Spent 425.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 17 [2018-06-22 13:56:30,987 WARN ]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2018-06-22 13:56:31,486 INFO ]: Checked inductivity of 105 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-22 13:56:31,486 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 13:56:31,516 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 13:56:31,525 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 13:56:31,773 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-06-22 13:56:31,773 INFO ]: Conjunction of SSA is unsat [2018-06-22 13:56:31,792 INFO ]: Computing forward predicates... [2018-06-22 13:56:32,419 WARN ]: Spent 242.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2018-06-22 13:56:32,851 WARN ]: Spent 304.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 69 [2018-06-22 13:56:33,584 WARN ]: Spent 230.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2018-06-22 13:56:34,330 INFO ]: Checked inductivity of 105 backedges. 9 proven. 62 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2018-06-22 13:56:34,363 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 13:56:34,363 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 26 [2018-06-22 13:56:34,364 INFO ]: Interpolant automaton has 26 states [2018-06-22 13:56:34,364 INFO ]: Constructing interpolant automaton starting with 26 interpolants. [2018-06-22 13:56:34,364 INFO ]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2018-06-22 13:56:34,364 INFO ]: Start difference. First operand 25 states and 26 transitions. Second operand 26 states. [2018-06-22 13:56:34,857 WARN ]: Spent 346.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 81 [2018-06-22 13:56:35,124 WARN ]: Spent 103.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 23 [2018-06-22 13:56:35,765 WARN ]: Spent 243.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 55 [2018-06-22 13:56:36,110 WARN ]: Spent 298.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 78 [2018-06-22 13:56:36,289 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 13:56:36,289 INFO ]: Finished difference Result 27 states and 28 transitions. [2018-06-22 13:56:36,294 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-06-22 13:56:36,294 INFO ]: Start accepts. Automaton has 26 states. Word has length 37 [2018-06-22 13:56:36,295 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 13:56:36,295 INFO ]: With dead ends: 27 [2018-06-22 13:56:36,295 INFO ]: Without dead ends: 27 [2018-06-22 13:56:36,296 INFO ]: 0 DeclaredPredicates, 62 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=253, Invalid=869, Unknown=0, NotChecked=0, Total=1122 [2018-06-22 13:56:36,296 INFO ]: Start minimizeSevpa. Operand 27 states. [2018-06-22 13:56:36,300 INFO ]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-06-22 13:56:36,300 INFO ]: Start removeUnreachable. Operand 27 states. [2018-06-22 13:56:36,300 INFO ]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-06-22 13:56:36,300 INFO ]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 37 [2018-06-22 13:56:36,300 INFO ]: Finished accepts. word is rejected. [2018-06-22 13:56:36,300 INFO ]: Abstraction has 27 states and 28 transitions. [2018-06-22 13:56:36,300 INFO ]: Interpolant automaton has 26 states. [2018-06-22 13:56:36,300 INFO ]: Start isEmpty. Operand 27 states and 28 transitions. [2018-06-22 13:56:36,301 INFO ]: Finished isEmpty. Found accepting run of length 42 [2018-06-22 13:56:36,301 INFO ]: Found error trace [2018-06-22 13:56:36,301 INFO ]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 13:56:36,301 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 13:56:36,301 INFO ]: Analyzing trace with hash -544278078, now seen corresponding path program 6 times [2018-06-22 13:56:36,301 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 13:56:36,301 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 13:56:36,302 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 13:56:36,302 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 13:56:36,302 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 13:56:36,779 INFO ]: Conjunction of SSA is unsat [2018-06-22 13:56:37,538 WARN ]: Spent 229.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 17 [2018-06-22 13:56:37,907 WARN ]: Spent 172.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 46 [2018-06-22 13:56:38,450 INFO ]: Checked inductivity of 136 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-06-22 13:56:38,450 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 13:56:38,450 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 [2018-06-22 13:56:38,455 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 13:56:38,693 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-06-22 13:56:38,693 INFO ]: Conjunction of SSA is unsat [2018-06-22 13:56:38,709 INFO ]: Computing forward predicates... [2018-06-22 13:56:39,916 WARN ]: Spent 748.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 102 [2018-06-22 13:56:41,294 WARN ]: Spent 1.18 s on a formula simplification. DAG size of input: 157 DAG size of output: 115 [2018-06-22 13:56:42,635 WARN ]: Spent 1.18 s on a formula simplification. DAG size of input: 155 DAG size of output: 113 [2018-06-22 13:56:43,286 WARN ]: Spent 490.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 101 [2018-06-22 13:56:43,895 WARN ]: Spent 437.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 107 [2018-06-22 13:56:44,353 WARN ]: Spent 307.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 69 [2018-06-22 13:56:44,775 WARN ]: Spent 233.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2018-06-22 13:56:45,655 INFO ]: Checked inductivity of 136 backedges. 7 proven. 93 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-06-22 13:56:45,677 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 13:56:45,677 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 33 [2018-06-22 13:56:45,678 INFO ]: Interpolant automaton has 33 states [2018-06-22 13:56:45,678 INFO ]: Constructing interpolant automaton starting with 33 interpolants. [2018-06-22 13:56:45,678 INFO ]: CoverageRelationStatistics Valid=191, Invalid=865, Unknown=0, NotChecked=0, Total=1056 [2018-06-22 13:56:45,678 INFO ]: Start difference. First operand 27 states and 28 transitions. Second operand 33 states. [2018-06-22 13:56:46,320 WARN ]: Spent 590.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 130 [2018-06-22 13:56:46,635 WARN ]: Spent 127.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 36 [2018-06-22 13:56:46,804 WARN ]: Spent 133.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 37 [2018-06-22 13:56:46,996 WARN ]: Spent 147.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 34 [2018-06-22 13:56:47,137 WARN ]: Spent 106.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 30 [2018-06-22 13:56:47,294 WARN ]: Spent 106.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 30 [2018-06-22 13:56:47,608 WARN ]: Spent 270.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 62 [2018-06-22 13:56:47,963 WARN ]: Spent 309.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 98 [2018-06-22 13:56:48,521 WARN ]: Spent 511.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 127 [2018-06-22 13:56:48,562 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 13:56:48,562 INFO ]: Finished difference Result 31 states and 32 transitions. [2018-06-22 13:56:48,562 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-06-22 13:56:48,562 INFO ]: Start accepts. Automaton has 33 states. Word has length 41 [2018-06-22 13:56:48,563 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 13:56:48,563 INFO ]: With dead ends: 31 [2018-06-22 13:56:48,563 INFO ]: Without dead ends: 31 [2018-06-22 13:56:48,565 INFO ]: 0 DeclaredPredicates, 70 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=442, Invalid=1364, Unknown=0, NotChecked=0, Total=1806 [2018-06-22 13:56:48,565 INFO ]: Start minimizeSevpa. Operand 31 states. [2018-06-22 13:56:48,570 INFO ]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-06-22 13:56:48,570 INFO ]: Start removeUnreachable. Operand 31 states. [2018-06-22 13:56:48,571 INFO ]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-06-22 13:56:48,571 INFO ]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 41 [2018-06-22 13:56:48,572 INFO ]: Finished accepts. word is rejected. [2018-06-22 13:56:48,572 INFO ]: Abstraction has 31 states and 32 transitions. [2018-06-22 13:56:48,572 INFO ]: Interpolant automaton has 33 states. [2018-06-22 13:56:48,572 INFO ]: Start isEmpty. Operand 31 states and 32 transitions. [2018-06-22 13:56:48,576 INFO ]: Finished isEmpty. Found accepting run of length 50 [2018-06-22 13:56:48,576 INFO ]: Found error trace [2018-06-22 13:56:48,576 INFO ]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 13:56:48,576 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 13:56:48,576 INFO ]: Analyzing trace with hash 352352522, now seen corresponding path program 7 times [2018-06-22 13:56:48,576 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 13:56:48,576 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 13:56:48,577 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 13:56:48,577 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 13:56:48,577 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 13:56:49,035 INFO ]: Conjunction of SSA is unsat [2018-06-22 13:56:50,343 WARN ]: Spent 743.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 17 [2018-06-22 13:56:50,709 WARN ]: Spent 125.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 30 [2018-06-22 13:56:50,904 WARN ]: Spent 180.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 29 [2018-06-22 13:56:51,568 INFO ]: Checked inductivity of 210 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2018-06-22 13:56:51,568 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 13:56:51,568 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 13:56:51,574 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 13:56:51,893 INFO ]: Conjunction of SSA is unsat [2018-06-22 13:56:51,913 INFO ]: Computing forward predicates... [2018-06-22 13:56:52,516 WARN ]: Spent 248.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2018-06-22 13:56:52,966 WARN ]: Spent 300.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 69 [2018-06-22 13:56:53,712 WARN ]: Spent 460.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 96 [2018-06-22 13:56:54,398 WARN ]: Spent 487.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 101 [2018-06-22 13:56:55,229 WARN ]: Spent 610.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 123 [2018-06-22 13:56:55,855 WARN ]: Spent 236.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2018-06-22 13:56:57,008 INFO ]: Checked inductivity of 210 backedges. 22 proven. 127 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2018-06-22 13:56:57,030 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 13:56:57,030 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21] total 33 [2018-06-22 13:56:57,030 INFO ]: Interpolant automaton has 33 states [2018-06-22 13:56:57,030 INFO ]: Constructing interpolant automaton starting with 33 interpolants. [2018-06-22 13:56:57,031 INFO ]: CoverageRelationStatistics Valid=179, Invalid=877, Unknown=0, NotChecked=0, Total=1056 [2018-06-22 13:56:57,031 INFO ]: Start difference. First operand 31 states and 32 transitions. Second operand 33 states. Received shutdown request... [2018-06-22 13:56:57,797 WARN ]: Removed 9 from assertion stack [2018-06-22 13:56:57,797 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 13:56:57,797 WARN ]: Verification canceled [2018-06-22 13:56:57,801 WARN ]: Timeout [2018-06-22 13:56:57,801 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 01:56:57 BoogieIcfgContainer [2018-06-22 13:56:57,801 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 13:56:57,802 INFO ]: Toolchain (without parser) took 56391.34 ms. Allocated memory was 308.3 MB in the beginning and 1.0 GB in the end (delta: 740.8 MB). Free memory was 242.7 MB in the beginning and 379.3 MB in the end (delta: -136.6 MB). Peak memory consumption was 604.3 MB. Max. memory is 3.6 GB. [2018-06-22 13:56:57,802 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 308.3 MB. Free memory is still 272.8 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 13:56:57,802 INFO ]: ChcToBoogie took 54.47 ms. Allocated memory is still 308.3 MB. Free memory was 242.7 MB in the beginning and 240.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 13:56:57,803 INFO ]: Boogie Preprocessor took 58.36 ms. Allocated memory is still 308.3 MB. Free memory was 240.7 MB in the beginning and 238.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 13:56:57,803 INFO ]: RCFGBuilder took 455.96 ms. Allocated memory is still 308.3 MB. Free memory was 238.7 MB in the beginning and 212.8 MB in the end (delta: 25.9 MB). Peak memory consumption was 25.9 MB. Max. memory is 3.6 GB. [2018-06-22 13:56:57,803 INFO ]: TraceAbstraction took 55813.31 ms. Allocated memory was 308.3 MB in the beginning and 1.0 GB in the end (delta: 740.8 MB). Free memory was 212.8 MB in the beginning and 379.3 MB in the end (delta: -166.5 MB). Peak memory consumption was 574.3 MB. Max. memory is 3.6 GB. [2018-06-22 13:56:57,805 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 308.3 MB. Free memory is still 272.8 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 54.47 ms. Allocated memory is still 308.3 MB. Free memory was 242.7 MB in the beginning and 240.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 58.36 ms. Allocated memory is still 308.3 MB. Free memory was 240.7 MB in the beginning and 238.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 455.96 ms. Allocated memory is still 308.3 MB. Free memory was 238.7 MB in the beginning and 212.8 MB in the end (delta: 25.9 MB). Peak memory consumption was 25.9 MB. Max. memory is 3.6 GB. * TraceAbstraction took 55813.31 ms. Allocated memory was 308.3 MB in the beginning and 1.0 GB in the end (delta: 740.8 MB). Free memory was 212.8 MB in the beginning and 379.3 MB in the end (delta: -166.5 MB). Peak memory consumption was 574.3 MB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [UNKNOWN] : Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 0). Cancelled while BasicCegarLoop was constructing difference of abstraction (31states) and interpolant automaton (currently 3 states, 33 states before enhancement), while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 160. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 55.7s OverallTime, 8 OverallIterations, 11 TraceHistogramMax, 13.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 93 SDtfs, 166 SDslu, 486 SDs, 0 SdLazy, 441 SolverSat, 209 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 339 GetRequests, 146 SyntacticMatches, 16 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 887 ImplicationChecksByTransitivity, 39.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=7, 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: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 3.0s SatisfiabilityAnalysisTime, 38.8s InterpolantComputationTime, 423 NumberOfCodeBlocks, 423 NumberOfCodeBlocksAsserted, 35 NumberOfCheckSat, 408 ConstructedInterpolants, 0 QuantifiedInterpolants, 469400 SizeOfPredicates, 2793 NumberOfNonLiveVariables, 3158 ConjunctsInSsa, 302 ConjunctsInUnsatCore, 15 InterpolantComputations, 1 PerfectInterpolantSequences, 340/1080 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/array_max-4.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_13-56-57-814.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/array_max-4.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_13-56-57-814.csv Completed graceful shutdown