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/ctigar/nest-len.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 15:23:59,944 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 15:23:59,946 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 15:23:59,957 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 15:23:59,957 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 15:23:59,958 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 15:23:59,959 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 15:23:59,960 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 15:23:59,962 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 15:23:59,963 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 15:23:59,963 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 15:23:59,964 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 15:23:59,964 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 15:23:59,966 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 15:23:59,966 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 15:23:59,967 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 15:23:59,969 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 15:23:59,971 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 15:23:59,980 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 15:23:59,985 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 15:23:59,985 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 15:23:59,987 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 15:23:59,988 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 15:23:59,988 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 15:23:59,989 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 15:23:59,990 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 15:23:59,990 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 15:23:59,991 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 15:23:59,992 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 15:23:59,992 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 15:23:59,993 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 15:23:59,994 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 15:23:59,994 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 15:23:59,995 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 15:23:59,996 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 15:23:59,996 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 15:24:00,020 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 15:24:00,021 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 15:24:00,021 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 15:24:00,021 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 15:24:00,022 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 15:24:00,022 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 15:24:00,023 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 15:24:00,023 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 15:24:00,023 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 15:24:00,023 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 15:24:00,023 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 15:24:00,024 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 15:24:00,028 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 15:24:00,028 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 15:24:00,028 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 15:24:00,028 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 15:24:00,029 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 15:24:00,029 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 15:24:00,029 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 15:24:00,030 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 15:24:00,031 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 15:24:00,071 INFO ]: Repository-Root is: /tmp [2018-06-22 15:24:00,090 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 15:24:00,094 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 15:24:00,096 INFO ]: Initializing SmtParser... [2018-06-22 15:24:00,096 INFO ]: SmtParser initialized [2018-06-22 15:24:00,096 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/nest-len.c.smt2 [2018-06-22 15:24:00,098 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 15:24:00,190 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/nest-len.c.smt2 unknown [2018-06-22 15:24:00,529 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/nest-len.c.smt2 [2018-06-22 15:24:00,534 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 15:24:00,544 INFO ]: Walking toolchain with 4 elements. [2018-06-22 15:24:00,545 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 15:24:00,545 INFO ]: Initializing ChcToBoogie... [2018-06-22 15:24:00,545 INFO ]: ChcToBoogie initialized [2018-06-22 15:24:00,551 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 03:24:00" (1/1) ... [2018-06-22 15:24:00,602 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:24:00 Unit [2018-06-22 15:24:00,603 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 15:24:00,604 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 15:24:00,604 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 15:24:00,604 INFO ]: Boogie Preprocessor initialized [2018-06-22 15:24:00,625 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:24:00" (1/1) ... [2018-06-22 15:24:00,625 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:24:00" (1/1) ... [2018-06-22 15:24:00,642 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:24:00" (1/1) ... [2018-06-22 15:24:00,642 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:24:00" (1/1) ... [2018-06-22 15:24:00,657 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:24:00" (1/1) ... [2018-06-22 15:24:00,658 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:24:00" (1/1) ... [2018-06-22 15:24:00,660 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:24:00" (1/1) ... [2018-06-22 15:24:00,662 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 15:24:00,663 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 15:24:00,663 INFO ]: Initializing RCFGBuilder... [2018-06-22 15:24:00,663 INFO ]: RCFGBuilder initialized [2018-06-22 15:24:00,664 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:24:00" (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 15:24:00,694 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 15:24:00,694 INFO ]: Found specification of procedure False [2018-06-22 15:24:00,694 INFO ]: Found implementation of procedure False [2018-06-22 15:24:00,694 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 15:24:00,694 INFO ]: Found specification of procedure state [2018-06-22 15:24:00,694 INFO ]: Found implementation of procedure state [2018-06-22 15:24:00,694 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 15:24:00,694 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 15:24:00,694 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 15:24:00,889 INFO ]: Using library mode [2018-06-22 15:24:00,890 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 03:24:00 BoogieIcfgContainer [2018-06-22 15:24:00,890 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 15:24:00,891 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 15:24:00,891 INFO ]: Initializing TraceAbstraction... [2018-06-22 15:24:00,902 INFO ]: TraceAbstraction initialized [2018-06-22 15:24:00,902 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 03:24:00" (1/3) ... [2018-06-22 15:24:00,903 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@104e08cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 03:24:00, skipping insertion in model container [2018-06-22 15:24:00,903 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:24:00" (2/3) ... [2018-06-22 15:24:00,903 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@104e08cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 03:24:00, skipping insertion in model container [2018-06-22 15:24:00,903 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 03:24:00" (3/3) ... [2018-06-22 15:24:00,905 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 15:24:00,915 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 15:24:00,926 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 15:24:00,968 INFO ]: Using default assertion order modulation [2018-06-22 15:24:00,969 INFO ]: Interprodecural is true [2018-06-22 15:24:00,969 INFO ]: Hoare is false [2018-06-22 15:24:00,969 INFO ]: Compute interpolants for FPandBP [2018-06-22 15:24:00,969 INFO ]: Backedges is TWOTRACK [2018-06-22 15:24:00,969 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 15:24:00,969 INFO ]: Difference is false [2018-06-22 15:24:00,969 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 15:24:00,969 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 15:24:00,982 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 15:24:00,994 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 15:24:00,994 INFO ]: Found error trace [2018-06-22 15:24:00,995 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:24:00,995 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:24:01,000 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-22 15:24:01,002 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:24:01,002 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:24:01,037 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:24:01,038 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:24:01,038 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:24:01,081 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:24:01,190 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 15:24:01,197 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 15:24:01,197 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 15:24:01,199 INFO ]: Interpolant automaton has 4 states [2018-06-22 15:24:01,224 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 15:24:01,224 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 15:24:01,227 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 15:24:01,329 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:24:01,329 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 15:24:01,330 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 15:24:01,331 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 15:24:01,331 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:24:01,340 INFO ]: With dead ends: 13 [2018-06-22 15:24:01,340 INFO ]: Without dead ends: 13 [2018-06-22 15:24:01,341 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 15:24:01,354 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 15:24:01,381 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 15:24:01,383 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 15:24:01,383 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 15:24:01,385 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 15:24:01,385 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:24:01,385 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 15:24:01,385 INFO ]: Interpolant automaton has 4 states. [2018-06-22 15:24:01,385 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 15:24:01,387 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 15:24:01,387 INFO ]: Found error trace [2018-06-22 15:24:01,387 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:24:01,388 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:24:01,388 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-22 15:24:01,388 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:24:01,388 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:24:01,389 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:24:01,389 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:24:01,389 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:24:01,451 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:24:01,788 WARN ]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-06-22 15:24:01,800 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 15:24:01,801 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:24:01,801 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 15:24:01,808 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:24:01,849 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:24:01,858 INFO ]: Computing forward predicates... [2018-06-22 15:24:02,135 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 15:24:02,155 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:24:02,155 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-06-22 15:24:02,156 INFO ]: Interpolant automaton has 6 states [2018-06-22 15:24:02,156 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 15:24:02,156 INFO ]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-06-22 15:24:02,156 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 6 states. [2018-06-22 15:24:02,354 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:24:02,354 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 15:24:02,354 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 15:24:02,354 INFO ]: Start accepts. Automaton has 6 states. Word has length 13 [2018-06-22 15:24:02,355 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:24:02,355 INFO ]: With dead ends: 15 [2018-06-22 15:24:02,355 INFO ]: Without dead ends: 15 [2018-06-22 15:24:02,356 INFO ]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-06-22 15:24:02,356 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 15:24:02,360 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 15:24:02,361 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 15:24:02,361 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 15:24:02,361 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 15:24:02,361 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:24:02,361 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 15:24:02,361 INFO ]: Interpolant automaton has 6 states. [2018-06-22 15:24:02,361 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 15:24:02,362 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 15:24:02,362 INFO ]: Found error trace [2018-06-22 15:24:02,362 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:24:02,362 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:24:02,362 INFO ]: Analyzing trace with hash -1486246934, now seen corresponding path program 2 times [2018-06-22 15:24:02,362 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:24:02,362 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:24:02,366 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:24:02,366 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:24:02,366 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:24:02,457 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:24:03,106 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 15:24:03,106 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:24:03,106 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 15:24:03,127 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 15:24:03,193 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 15:24:03,193 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:24:03,196 INFO ]: Computing forward predicates... [2018-06-22 15:24:03,729 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 15:24:03,752 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:24:03,752 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2018-06-22 15:24:03,752 INFO ]: Interpolant automaton has 10 states [2018-06-22 15:24:03,752 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-22 15:24:03,753 INFO ]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-06-22 15:24:03,753 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 10 states. [2018-06-22 15:24:03,921 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:24:03,921 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 15:24:03,921 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 15:24:03,921 INFO ]: Start accepts. Automaton has 10 states. Word has length 17 [2018-06-22 15:24:03,921 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:24:03,922 INFO ]: With dead ends: 17 [2018-06-22 15:24:03,922 INFO ]: Without dead ends: 17 [2018-06-22 15:24:03,922 INFO ]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2018-06-22 15:24:03,922 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 15:24:03,925 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 15:24:03,925 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 15:24:03,926 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 15:24:03,926 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 15:24:03,926 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:24:03,926 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 15:24:03,926 INFO ]: Interpolant automaton has 10 states. [2018-06-22 15:24:03,926 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 15:24:03,927 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 15:24:03,927 INFO ]: Found error trace [2018-06-22 15:24:03,927 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:24:03,927 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:24:03,927 INFO ]: Analyzing trace with hash -2056434034, now seen corresponding path program 3 times [2018-06-22 15:24:03,927 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:24:03,927 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:24:03,928 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:24:03,928 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:24:03,928 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:24:03,970 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:24:04,470 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 15:24:04,470 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:24:04,470 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 15:24:04,492 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 15:24:04,576 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 15:24:04,576 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:24:04,581 INFO ]: Computing forward predicates... [2018-06-22 15:24:04,840 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 15:24:04,859 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:24:04,859 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2018-06-22 15:24:04,859 INFO ]: Interpolant automaton has 12 states [2018-06-22 15:24:04,860 INFO ]: Constructing interpolant automaton starting with 12 interpolants. [2018-06-22 15:24:04,860 INFO ]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2018-06-22 15:24:04,860 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 12 states. [2018-06-22 15:24:05,013 WARN ]: Spent 135.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 39 [2018-06-22 15:24:05,360 WARN ]: Spent 195.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2018-06-22 15:24:05,479 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:24:05,479 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-22 15:24:05,480 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 15:24:05,480 INFO ]: Start accepts. Automaton has 12 states. Word has length 21 [2018-06-22 15:24:05,481 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:24:05,481 INFO ]: With dead ends: 19 [2018-06-22 15:24:05,481 INFO ]: Without dead ends: 19 [2018-06-22 15:24:05,482 INFO ]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2018-06-22 15:24:05,482 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 15:24:05,486 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 15:24:05,486 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 15:24:05,486 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-22 15:24:05,486 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-22 15:24:05,487 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:24:05,487 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-22 15:24:05,487 INFO ]: Interpolant automaton has 12 states. [2018-06-22 15:24:05,487 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-22 15:24:05,487 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 15:24:05,487 INFO ]: Found error trace [2018-06-22 15:24:05,487 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:24:05,487 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:24:05,487 INFO ]: Analyzing trace with hash -434924750, now seen corresponding path program 4 times [2018-06-22 15:24:05,487 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:24:05,487 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:24:05,488 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:24:05,488 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:24:05,488 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:24:05,543 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:24:06,292 WARN ]: Spent 540.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 9 [2018-06-22 15:24:06,520 WARN ]: Spent 156.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2018-06-22 15:24:06,731 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 15:24:06,731 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:24:06,731 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 15:24:06,747 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 15:24:06,802 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 15:24:06,802 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:24:06,806 INFO ]: Computing forward predicates... [2018-06-22 15:24:07,111 WARN ]: Spent 235.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2018-06-22 15:24:07,937 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 15:24:07,956 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:24:07,956 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2018-06-22 15:24:07,956 INFO ]: Interpolant automaton has 15 states [2018-06-22 15:24:07,957 INFO ]: Constructing interpolant automaton starting with 15 interpolants. [2018-06-22 15:24:07,957 INFO ]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2018-06-22 15:24:07,957 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 15 states. [2018-06-22 15:24:08,256 WARN ]: Spent 279.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2018-06-22 15:24:08,580 WARN ]: Spent 297.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2018-06-22 15:24:08,800 WARN ]: Spent 203.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 36 [2018-06-22 15:24:09,044 WARN ]: Spent 228.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 37 [2018-06-22 15:24:09,284 WARN ]: Spent 222.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2018-06-22 15:24:09,304 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:24:09,304 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-22 15:24:09,311 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 15:24:09,311 INFO ]: Start accepts. Automaton has 15 states. Word has length 25 [2018-06-22 15:24:09,311 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:24:09,312 INFO ]: With dead ends: 21 [2018-06-22 15:24:09,312 INFO ]: Without dead ends: 21 [2018-06-22 15:24:09,312 INFO ]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2018-06-22 15:24:09,312 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-22 15:24:09,320 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-22 15:24:09,320 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-22 15:24:09,321 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-22 15:24:09,321 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 25 [2018-06-22 15:24:09,321 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:24:09,321 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-22 15:24:09,321 INFO ]: Interpolant automaton has 15 states. [2018-06-22 15:24:09,321 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-22 15:24:09,322 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 15:24:09,322 INFO ]: Found error trace [2018-06-22 15:24:09,322 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:24:09,322 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:24:09,322 INFO ]: Analyzing trace with hash 1986427350, now seen corresponding path program 5 times [2018-06-22 15:24:09,322 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:24:09,322 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:24:09,323 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:24:09,323 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:24:09,323 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:24:09,395 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:24:10,056 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 15:24:10,056 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:24:10,056 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 15:24:10,063 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 15:24:10,207 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-06-22 15:24:10,207 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:24:10,213 INFO ]: Computing forward predicates... [2018-06-22 15:24:10,873 WARN ]: Spent 348.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 36 [2018-06-22 15:24:11,042 WARN ]: Spent 137.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2018-06-22 15:24:12,175 WARN ]: Spent 565.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-06-22 15:24:12,771 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 15:24:12,790 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:24:12,790 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2018-06-22 15:24:12,790 INFO ]: Interpolant automaton has 19 states [2018-06-22 15:24:12,790 INFO ]: Constructing interpolant automaton starting with 19 interpolants. [2018-06-22 15:24:12,790 INFO ]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2018-06-22 15:24:12,791 INFO ]: Start difference. First operand 21 states and 22 transitions. Second operand 19 states. [2018-06-22 15:24:13,334 WARN ]: Spent 513.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2018-06-22 15:24:13,770 WARN ]: Spent 389.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 37 [2018-06-22 15:24:14,201 WARN ]: Spent 407.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2018-06-22 15:24:14,603 WARN ]: Spent 381.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2018-06-22 15:24:14,935 WARN ]: Spent 310.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 47 [2018-06-22 15:24:15,396 WARN ]: Spent 437.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2018-06-22 15:24:15,471 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:24:15,471 INFO ]: Finished difference Result 23 states and 24 transitions. [2018-06-22 15:24:15,472 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 15:24:15,472 INFO ]: Start accepts. Automaton has 19 states. Word has length 29 [2018-06-22 15:24:15,472 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:24:15,473 INFO ]: With dead ends: 23 [2018-06-22 15:24:15,473 INFO ]: Without dead ends: 23 [2018-06-22 15:24:15,473 INFO ]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2018-06-22 15:24:15,473 INFO ]: Start minimizeSevpa. Operand 23 states. [2018-06-22 15:24:15,477 INFO ]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-06-22 15:24:15,477 INFO ]: Start removeUnreachable. Operand 23 states. [2018-06-22 15:24:15,478 INFO ]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-06-22 15:24:15,478 INFO ]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 29 [2018-06-22 15:24:15,479 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:24:15,479 INFO ]: Abstraction has 23 states and 24 transitions. [2018-06-22 15:24:15,479 INFO ]: Interpolant automaton has 19 states. [2018-06-22 15:24:15,479 INFO ]: Start isEmpty. Operand 23 states and 24 transitions. [2018-06-22 15:24:15,480 INFO ]: Finished isEmpty. Found accepting run of length 34 [2018-06-22 15:24:15,480 INFO ]: Found error trace [2018-06-22 15:24:15,480 INFO ]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:24:15,480 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:24:15,480 INFO ]: Analyzing trace with hash 800064122, now seen corresponding path program 6 times [2018-06-22 15:24:15,480 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:24:15,480 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:24:15,481 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:24:15,481 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:24:15,481 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:24:15,533 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:24:16,351 WARN ]: Spent 573.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-06-22 15:24:16,879 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 15:24:16,879 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:24:16,879 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 15:24:16,885 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 15:24:16,976 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-06-22 15:24:16,976 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:24:16,981 INFO ]: Computing forward predicates... [2018-06-22 15:24:17,271 WARN ]: Spent 224.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 12 [2018-06-22 15:24:17,477 WARN ]: Spent 140.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2018-06-22 15:24:18,141 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 15:24:18,170 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:24:18,170 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 20 [2018-06-22 15:24:18,170 INFO ]: Interpolant automaton has 20 states [2018-06-22 15:24:18,170 INFO ]: Constructing interpolant automaton starting with 20 interpolants. [2018-06-22 15:24:18,170 INFO ]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2018-06-22 15:24:18,171 INFO ]: Start difference. First operand 23 states and 24 transitions. Second operand 20 states. [2018-06-22 15:24:18,468 WARN ]: Spent 269.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 57 [2018-06-22 15:24:18,788 WARN ]: Spent 148.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 36 [2018-06-22 15:24:19,027 WARN ]: Spent 201.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 37 [2018-06-22 15:24:19,227 WARN ]: Spent 174.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2018-06-22 15:24:19,462 WARN ]: Spent 203.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 31 [2018-06-22 15:24:19,685 WARN ]: Spent 202.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 34 [2018-06-22 15:24:20,057 WARN ]: Spent 347.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2018-06-22 15:24:20,168 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:24:20,168 INFO ]: Finished difference Result 25 states and 26 transitions. [2018-06-22 15:24:20,169 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-22 15:24:20,169 INFO ]: Start accepts. Automaton has 20 states. Word has length 33 [2018-06-22 15:24:20,170 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:24:20,170 INFO ]: With dead ends: 25 [2018-06-22 15:24:20,170 INFO ]: Without dead ends: 25 [2018-06-22 15:24:20,171 INFO ]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=157, Invalid=545, Unknown=0, NotChecked=0, Total=702 [2018-06-22 15:24:20,171 INFO ]: Start minimizeSevpa. Operand 25 states. [2018-06-22 15:24:20,175 INFO ]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-06-22 15:24:20,175 INFO ]: Start removeUnreachable. Operand 25 states. [2018-06-22 15:24:20,176 INFO ]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-06-22 15:24:20,176 INFO ]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 33 [2018-06-22 15:24:20,176 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:24:20,176 INFO ]: Abstraction has 25 states and 26 transitions. [2018-06-22 15:24:20,176 INFO ]: Interpolant automaton has 20 states. [2018-06-22 15:24:20,176 INFO ]: Start isEmpty. Operand 25 states and 26 transitions. [2018-06-22 15:24:20,177 INFO ]: Finished isEmpty. Found accepting run of length 38 [2018-06-22 15:24:20,177 INFO ]: Found error trace [2018-06-22 15:24:20,177 INFO ]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:24:20,177 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:24:20,177 INFO ]: Analyzing trace with hash -411423458, now seen corresponding path program 7 times [2018-06-22 15:24:20,177 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:24:20,178 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:24:20,178 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:24:20,178 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:24:20,178 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:24:20,263 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:24:20,916 INFO ]: Checked inductivity of 105 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-22 15:24:20,916 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:24:20,916 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 15:24:20,922 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:24:20,992 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:24:20,998 INFO ]: Computing forward predicates... [2018-06-22 15:24:23,314 WARN ]: Spent 2.08 s on a formula simplification. DAG size of input: 126 DAG size of output: 85 [2018-06-22 15:24:23,515 WARN ]: Spent 137.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2018-06-22 15:24:25,099 INFO ]: Checked inductivity of 105 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-22 15:24:25,118 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:24:25,118 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 22 [2018-06-22 15:24:25,119 INFO ]: Interpolant automaton has 22 states [2018-06-22 15:24:25,119 INFO ]: Constructing interpolant automaton starting with 22 interpolants. [2018-06-22 15:24:25,119 INFO ]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2018-06-22 15:24:25,119 INFO ]: Start difference. First operand 25 states and 26 transitions. Second operand 22 states. [2018-06-22 15:24:26,570 WARN ]: Spent 1.41 s on a formula simplification. DAG size of input: 122 DAG size of output: 113 [2018-06-22 15:24:27,277 WARN ]: Spent 647.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 37 [2018-06-22 15:24:27,902 WARN ]: Spent 578.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 39 [2018-06-22 15:24:28,445 WARN ]: Spent 507.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 65 [2018-06-22 15:24:29,063 WARN ]: Spent 584.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 64 [2018-06-22 15:24:29,665 WARN ]: Spent 569.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 62 [2018-06-22 15:24:30,228 WARN ]: Spent 531.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 62 [2018-06-22 15:24:31,708 WARN ]: Spent 1.44 s on a formula simplification. DAG size of input: 118 DAG size of output: 102 [2018-06-22 15:24:31,741 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:24:31,741 INFO ]: Finished difference Result 27 states and 28 transitions. [2018-06-22 15:24:31,742 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-06-22 15:24:31,742 INFO ]: Start accepts. Automaton has 22 states. Word has length 37 [2018-06-22 15:24:31,742 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:24:31,743 INFO ]: With dead ends: 27 [2018-06-22 15:24:31,743 INFO ]: Without dead ends: 27 [2018-06-22 15:24:31,743 INFO ]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=180, Invalid=690, Unknown=0, NotChecked=0, Total=870 [2018-06-22 15:24:31,743 INFO ]: Start minimizeSevpa. Operand 27 states. [2018-06-22 15:24:31,746 INFO ]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-06-22 15:24:31,746 INFO ]: Start removeUnreachable. Operand 27 states. [2018-06-22 15:24:31,746 INFO ]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-06-22 15:24:31,746 INFO ]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 37 [2018-06-22 15:24:31,746 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:24:31,746 INFO ]: Abstraction has 27 states and 28 transitions. [2018-06-22 15:24:31,746 INFO ]: Interpolant automaton has 22 states. [2018-06-22 15:24:31,746 INFO ]: Start isEmpty. Operand 27 states and 28 transitions. [2018-06-22 15:24:31,750 INFO ]: Finished isEmpty. Found accepting run of length 42 [2018-06-22 15:24:31,750 INFO ]: Found error trace [2018-06-22 15:24:31,750 INFO ]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:24:31,750 INFO ]: === Iteration 9 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:24:31,750 INFO ]: Analyzing trace with hash -544278078, now seen corresponding path program 8 times [2018-06-22 15:24:31,750 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:24:31,750 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:24:31,751 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:24:31,751 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:24:31,751 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:24:31,828 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:24:32,361 WARN ]: Spent 326.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2018-06-22 15:24:32,917 INFO ]: Checked inductivity of 136 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-06-22 15:24:32,917 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:24:32,917 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:24:32,923 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 15:24:33,007 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 15:24:33,007 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:24:33,014 INFO ]: Computing forward predicates... [2018-06-22 15:24:33,210 WARN ]: Spent 134.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 18 [2018-06-22 15:24:33,513 WARN ]: Spent 117.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2018-06-22 15:24:35,885 INFO ]: Checked inductivity of 136 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-06-22 15:24:35,916 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:24:35,916 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 25 [2018-06-22 15:24:35,916 INFO ]: Interpolant automaton has 25 states [2018-06-22 15:24:35,916 INFO ]: Constructing interpolant automaton starting with 25 interpolants. [2018-06-22 15:24:35,917 INFO ]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2018-06-22 15:24:35,917 INFO ]: Start difference. First operand 27 states and 28 transitions. Second operand 25 states. [2018-06-22 15:24:36,459 WARN ]: Spent 420.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2018-06-22 15:24:36,599 WARN ]: Spent 100.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 36 [2018-06-22 15:24:36,907 WARN ]: Spent 235.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 45 [2018-06-22 15:24:37,134 WARN ]: Spent 188.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2018-06-22 15:24:37,359 WARN ]: Spent 142.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 40 [2018-06-22 15:24:37,531 WARN ]: Spent 149.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 39 [2018-06-22 15:24:37,760 WARN ]: Spent 202.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2018-06-22 15:24:37,915 WARN ]: Spent 132.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 38 [2018-06-22 15:24:38,180 WARN ]: Spent 236.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2018-06-22 15:24:38,225 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:24:38,225 INFO ]: Finished difference Result 29 states and 30 transitions. [2018-06-22 15:24:38,227 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-06-22 15:24:38,227 INFO ]: Start accepts. Automaton has 25 states. Word has length 41 [2018-06-22 15:24:38,227 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:24:38,228 INFO ]: With dead ends: 29 [2018-06-22 15:24:38,228 INFO ]: Without dead ends: 29 [2018-06-22 15:24:38,228 INFO ]: 0 DeclaredPredicates, 69 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=233, Invalid=889, Unknown=0, NotChecked=0, Total=1122 [2018-06-22 15:24:38,228 INFO ]: Start minimizeSevpa. Operand 29 states. [2018-06-22 15:24:38,232 INFO ]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-06-22 15:24:38,232 INFO ]: Start removeUnreachable. Operand 29 states. [2018-06-22 15:24:38,233 INFO ]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-06-22 15:24:38,233 INFO ]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 41 [2018-06-22 15:24:38,233 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:24:38,233 INFO ]: Abstraction has 29 states and 30 transitions. [2018-06-22 15:24:38,233 INFO ]: Interpolant automaton has 25 states. [2018-06-22 15:24:38,233 INFO ]: Start isEmpty. Operand 29 states and 30 transitions. [2018-06-22 15:24:38,234 INFO ]: Finished isEmpty. Found accepting run of length 46 [2018-06-22 15:24:38,234 INFO ]: Found error trace [2018-06-22 15:24:38,234 INFO ]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:24:38,234 INFO ]: === Iteration 10 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:24:38,234 INFO ]: Analyzing trace with hash 1442343014, now seen corresponding path program 9 times [2018-06-22 15:24:38,234 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:24:38,234 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:24:38,235 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:24:38,235 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:24:38,235 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:24:38,305 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:24:38,671 WARN ]: Spent 153.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2018-06-22 15:24:39,411 INFO ]: Checked inductivity of 171 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-06-22 15:24:39,411 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:24:39,411 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:24:39,416 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 15:24:39,526 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-06-22 15:24:39,526 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:24:39,534 INFO ]: Computing forward predicates... [2018-06-22 15:24:39,795 WARN ]: Spent 203.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 12 [2018-06-22 15:24:40,055 WARN ]: Spent 114.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2018-06-22 15:24:40,571 WARN ]: Spent 107.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2018-06-22 15:24:42,278 INFO ]: Checked inductivity of 171 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-06-22 15:24:42,298 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:24:42,298 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 37 [2018-06-22 15:24:42,298 INFO ]: Interpolant automaton has 37 states [2018-06-22 15:24:42,298 INFO ]: Constructing interpolant automaton starting with 37 interpolants. [2018-06-22 15:24:42,299 INFO ]: CoverageRelationStatistics Valid=131, Invalid=1201, Unknown=0, NotChecked=0, Total=1332 [2018-06-22 15:24:42,299 INFO ]: Start difference. First operand 29 states and 30 transitions. Second operand 37 states. [2018-06-22 15:24:42,986 WARN ]: Spent 618.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 75 [2018-06-22 15:24:43,212 WARN ]: Spent 170.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 38 [2018-06-22 15:24:43,554 WARN ]: Spent 286.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 44 [2018-06-22 15:24:43,845 WARN ]: Spent 255.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 46 [2018-06-22 15:24:44,186 WARN ]: Spent 308.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 50 [2018-06-22 15:24:44,556 WARN ]: Spent 337.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 53 [2018-06-22 15:24:44,934 WARN ]: Spent 324.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 51 [2018-06-22 15:24:45,154 WARN ]: Spent 187.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 43 [2018-06-22 15:24:45,484 WARN ]: Spent 294.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 45 [2018-06-22 15:24:46,151 WARN ]: Spent 559.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 70 [2018-06-22 15:24:46,191 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:24:46,191 INFO ]: Finished difference Result 31 states and 32 transitions. [2018-06-22 15:24:46,191 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-06-22 15:24:46,191 INFO ]: Start accepts. Automaton has 37 states. Word has length 45 [2018-06-22 15:24:46,192 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:24:46,192 INFO ]: With dead ends: 31 [2018-06-22 15:24:46,192 INFO ]: Without dead ends: 31 [2018-06-22 15:24:46,193 INFO ]: 0 DeclaredPredicates, 76 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=360, Invalid=1802, Unknown=0, NotChecked=0, Total=2162 [2018-06-22 15:24:46,193 INFO ]: Start minimizeSevpa. Operand 31 states. [2018-06-22 15:24:46,197 INFO ]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-06-22 15:24:46,197 INFO ]: Start removeUnreachable. Operand 31 states. [2018-06-22 15:24:46,198 INFO ]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-06-22 15:24:46,198 INFO ]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 45 [2018-06-22 15:24:46,198 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:24:46,198 INFO ]: Abstraction has 31 states and 32 transitions. [2018-06-22 15:24:46,198 INFO ]: Interpolant automaton has 37 states. [2018-06-22 15:24:46,198 INFO ]: Start isEmpty. Operand 31 states and 32 transitions. [2018-06-22 15:24:46,199 INFO ]: Finished isEmpty. Found accepting run of length 50 [2018-06-22 15:24:46,199 INFO ]: Found error trace [2018-06-22 15:24:46,199 INFO ]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:24:46,199 INFO ]: === Iteration 11 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:24:46,199 INFO ]: Analyzing trace with hash 352352522, now seen corresponding path program 10 times [2018-06-22 15:24:46,199 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:24:46,199 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:24:46,200 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:24:46,200 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:24:46,200 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:24:46,316 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:24:46,711 WARN ]: Spent 136.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2018-06-22 15:24:47,537 INFO ]: Checked inductivity of 210 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2018-06-22 15:24:47,537 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:24:47,537 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:24:47,559 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 15:24:47,677 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 15:24:47,677 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:24:47,685 INFO ]: Computing forward predicates... [2018-06-22 15:24:48,210 WARN ]: Spent 187.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2018-06-22 15:24:48,385 WARN ]: Spent 143.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2018-06-22 15:24:48,770 WARN ]: Spent 115.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2018-06-22 15:24:50,174 INFO ]: Checked inductivity of 210 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2018-06-22 15:24:50,194 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:24:50,194 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 40 [2018-06-22 15:24:50,194 INFO ]: Interpolant automaton has 40 states [2018-06-22 15:24:50,194 INFO ]: Constructing interpolant automaton starting with 40 interpolants. [2018-06-22 15:24:50,194 INFO ]: CoverageRelationStatistics Valid=142, Invalid=1418, Unknown=0, NotChecked=0, Total=1560 [2018-06-22 15:24:50,195 INFO ]: Start difference. First operand 31 states and 32 transitions. Second operand 40 states. [2018-06-22 15:24:51,095 WARN ]: Spent 843.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 96 [2018-06-22 15:24:51,395 WARN ]: Spent 226.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 34 [2018-06-22 15:24:51,745 WARN ]: Spent 304.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 41 [2018-06-22 15:24:52,143 WARN ]: Spent 349.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 48 [2018-06-22 15:24:52,681 WARN ]: Spent 482.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 51 [2018-06-22 15:24:53,085 WARN ]: Spent 360.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 52 [2018-06-22 15:24:53,516 WARN ]: Spent 389.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 55 [2018-06-22 15:24:53,936 WARN ]: Spent 378.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 44 [2018-06-22 15:24:54,337 WARN ]: Spent 359.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 48 [2018-06-22 15:24:54,767 WARN ]: Spent 384.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 53 [2018-06-22 15:24:55,259 WARN ]: Spent 452.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 51 [2018-06-22 15:24:55,713 WARN ]: Spent 411.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 51 [2018-06-22 15:24:56,197 WARN ]: Spent 443.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 59 [2018-06-22 15:24:56,984 WARN ]: Spent 727.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 89 [2018-06-22 15:24:57,031 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:24:57,031 INFO ]: Finished difference Result 39 states and 40 transitions. [2018-06-22 15:24:57,032 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-06-22 15:24:57,032 INFO ]: Start accepts. Automaton has 40 states. Word has length 49 [2018-06-22 15:24:57,032 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:24:57,033 INFO ]: With dead ends: 39 [2018-06-22 15:24:57,033 INFO ]: Without dead ends: 39 [2018-06-22 15:24:57,034 INFO ]: 0 DeclaredPredicates, 86 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=498, Invalid=2364, Unknown=0, NotChecked=0, Total=2862 [2018-06-22 15:24:57,034 INFO ]: Start minimizeSevpa. Operand 39 states. [2018-06-22 15:24:57,039 INFO ]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-06-22 15:24:57,039 INFO ]: Start removeUnreachable. Operand 39 states. [2018-06-22 15:24:57,040 INFO ]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-06-22 15:24:57,040 INFO ]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 49 [2018-06-22 15:24:57,041 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:24:57,041 INFO ]: Abstraction has 39 states and 40 transitions. [2018-06-22 15:24:57,041 INFO ]: Interpolant automaton has 40 states. [2018-06-22 15:24:57,041 INFO ]: Start isEmpty. Operand 39 states and 40 transitions. [2018-06-22 15:24:57,042 INFO ]: Finished isEmpty. Found accepting run of length 66 [2018-06-22 15:24:57,042 INFO ]: Found error trace [2018-06-22 15:24:57,042 INFO ]: trace histogram [15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:24:57,042 INFO ]: === Iteration 12 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:24:57,042 INFO ]: Analyzing trace with hash 1641746330, now seen corresponding path program 11 times [2018-06-22 15:24:57,042 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:24:57,042 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:24:57,043 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:24:57,043 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:24:57,043 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:24:57,164 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:24:57,700 WARN ]: Spent 113.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2018-06-22 15:24:58,232 WARN ]: Spent 145.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2018-06-22 15:24:59,390 INFO ]: Checked inductivity of 406 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2018-06-22 15:24:59,390 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:24:59,390 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:24:59,395 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 15:24:59,559 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2018-06-22 15:24:59,559 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:24:59,569 INFO ]: Computing forward predicates... [2018-06-22 15:24:59,779 WARN ]: Spent 143.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 24 [2018-06-22 15:25:00,200 WARN ]: Spent 355.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2018-06-22 15:25:00,424 WARN ]: Spent 179.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 35 [2018-06-22 15:25:00,592 WARN ]: Spent 120.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2018-06-22 15:25:00,739 WARN ]: Spent 110.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 Received shutdown request... [2018-06-22 15:25:00,850 WARN ]: Removed 17 from assertion stack [2018-06-22 15:25:00,850 INFO ]: Timeout while computing interpolants [2018-06-22 15:25:01,051 WARN ]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:25:01,051 WARN ]: Verification canceled [2018-06-22 15:25:01,055 WARN ]: Timeout [2018-06-22 15:25:01,056 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 03:25:01 BoogieIcfgContainer [2018-06-22 15:25:01,056 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 15:25:01,057 INFO ]: Toolchain (without parser) took 60521.87 ms. Allocated memory was 308.8 MB in the beginning and 870.8 MB in the end (delta: 562.0 MB). Free memory was 255.2 MB in the beginning and 244.3 MB in the end (delta: 10.9 MB). Peak memory consumption was 572.9 MB. Max. memory is 3.6 GB. [2018-06-22 15:25:01,058 INFO ]: SmtParser took 0.06 ms. Allocated memory is still 308.8 MB. Free memory is still 272.3 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 15:25:01,058 INFO ]: ChcToBoogie took 59.07 ms. Allocated memory is still 308.8 MB. Free memory was 255.2 MB in the beginning and 253.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 15:25:01,058 INFO ]: Boogie Preprocessor took 58.33 ms. Allocated memory is still 308.8 MB. Free memory was 253.2 MB in the beginning and 252.2 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 3.6 GB. [2018-06-22 15:25:01,059 INFO ]: RCFGBuilder took 227.07 ms. Allocated memory is still 308.8 MB. Free memory was 251.2 MB in the beginning and 239.2 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 3.6 GB. [2018-06-22 15:25:01,059 INFO ]: TraceAbstraction took 60164.63 ms. Allocated memory was 308.8 MB in the beginning and 870.8 MB in the end (delta: 562.0 MB). Free memory was 239.2 MB in the beginning and 244.3 MB in the end (delta: -5.1 MB). Peak memory consumption was 556.9 MB. Max. memory is 3.6 GB. [2018-06-22 15:25:01,066 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.06 ms. Allocated memory is still 308.8 MB. Free memory is still 272.3 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 59.07 ms. Allocated memory is still 308.8 MB. Free memory was 255.2 MB in the beginning and 253.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 58.33 ms. Allocated memory is still 308.8 MB. Free memory was 253.2 MB in the beginning and 252.2 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 227.07 ms. Allocated memory is still 308.8 MB. Free memory was 251.2 MB in the beginning and 239.2 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 60164.63 ms. Allocated memory was 308.8 MB in the beginning and 870.8 MB in the end (delta: 562.0 MB). Free memory was 239.2 MB in the beginning and 244.3 MB in the end (delta: -5.1 MB). Peak memory consumption was 556.9 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 analyzing trace of length 66 with TraceHistMax 15, while TraceCheckSpWp was constructing forward predicates, while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 33. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 60.0s OverallTime, 12 OverallIterations, 15 TraceHistogramMax, 26.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 156 SDtfs, 619 SDslu, 1190 SDs, 0 SdLazy, 1107 SolverSat, 693 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 520 GetRequests, 253 SyntacticMatches, 13 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1206 ImplicationChecksByTransitivity, 41.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=39occurred in iteration=11, 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, 11 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 27.0s InterpolantComputationTime, 629 NumberOfCodeBlocks, 629 NumberOfCodeBlocksAsserted, 46 NumberOfCheckSat, 608 ConstructedInterpolants, 0 QuantifiedInterpolants, 146061860 SizeOfPredicates, 792 NumberOfNonLiveVariables, 3955 ConjunctsInSsa, 575 ConjunctsInUnsatCore, 21 InterpolantComputations, 1 PerfectInterpolantSequences, 440/1650 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/nest-len.c.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_15-25-01-079.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/nest-len.c.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_15-25-01-079.csv Completed graceful shutdown