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/nested3.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 15:14:48,889 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 15:14:48,890 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 15:14:48,905 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 15:14:48,905 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 15:14:48,906 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 15:14:48,907 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 15:14:48,909 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 15:14:48,911 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 15:14:48,911 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 15:14:48,914 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 15:14:48,914 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 15:14:48,915 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 15:14:48,916 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 15:14:48,916 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 15:14:48,919 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 15:14:48,921 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 15:14:48,923 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 15:14:48,932 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 15:14:48,933 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 15:14:48,938 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 15:14:48,940 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 15:14:48,941 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 15:14:48,941 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 15:14:48,941 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 15:14:48,942 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 15:14:48,943 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 15:14:48,943 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 15:14:48,944 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 15:14:48,944 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 15:14:48,949 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 15:14:48,949 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 15:14:48,949 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 15:14:48,950 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 15:14:48,951 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 15:14:48,951 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 15:14:48,973 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 15:14:48,973 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 15:14:48,974 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 15:14:48,974 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 15:14:48,975 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 15:14:48,975 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 15:14:48,975 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 15:14:48,975 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 15:14:48,976 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 15:14:48,976 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 15:14:48,976 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 15:14:48,976 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 15:14:48,976 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 15:14:48,976 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 15:14:48,976 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 15:14:48,977 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 15:14:48,977 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 15:14:48,978 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 15:14:48,978 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 15:14:48,979 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 15:14:48,979 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 15:14:49,026 INFO ]: Repository-Root is: /tmp [2018-06-22 15:14:49,043 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 15:14:49,049 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 15:14:49,050 INFO ]: Initializing SmtParser... [2018-06-22 15:14:49,050 INFO ]: SmtParser initialized [2018-06-22 15:14:49,051 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/nested3.c.smt2 [2018-06-22 15:14:49,052 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 15:14:49,131 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/nested3.c.smt2 unknown [2018-06-22 15:14:49,338 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/nested3.c.smt2 [2018-06-22 15:14:49,343 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 15:14:49,349 INFO ]: Walking toolchain with 4 elements. [2018-06-22 15:14:49,349 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 15:14:49,349 INFO ]: Initializing ChcToBoogie... [2018-06-22 15:14:49,350 INFO ]: ChcToBoogie initialized [2018-06-22 15:14:49,353 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 03:14:49" (1/1) ... [2018-06-22 15:14:49,400 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:14:49 Unit [2018-06-22 15:14:49,401 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 15:14:49,401 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 15:14:49,401 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 15:14:49,401 INFO ]: Boogie Preprocessor initialized [2018-06-22 15:14:49,425 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:14:49" (1/1) ... [2018-06-22 15:14:49,426 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:14:49" (1/1) ... [2018-06-22 15:14:49,436 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:14:49" (1/1) ... [2018-06-22 15:14:49,436 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:14:49" (1/1) ... [2018-06-22 15:14:49,449 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:14:49" (1/1) ... [2018-06-22 15:14:49,450 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:14:49" (1/1) ... [2018-06-22 15:14:49,451 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:14:49" (1/1) ... [2018-06-22 15:14:49,453 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 15:14:49,454 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 15:14:49,454 INFO ]: Initializing RCFGBuilder... [2018-06-22 15:14:49,454 INFO ]: RCFGBuilder initialized [2018-06-22 15:14:49,454 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:14:49" (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 15:14:49,472 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 15:14:49,472 INFO ]: Found specification of procedure False [2018-06-22 15:14:49,472 INFO ]: Found implementation of procedure False [2018-06-22 15:14:49,472 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 15:14:49,473 INFO ]: Found specification of procedure state [2018-06-22 15:14:49,473 INFO ]: Found implementation of procedure state [2018-06-22 15:14:49,473 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 15:14:49,473 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 15:14:49,473 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 15:14:49,697 INFO ]: Using library mode [2018-06-22 15:14:49,697 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 03:14:49 BoogieIcfgContainer [2018-06-22 15:14:49,697 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 15:14:49,698 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 15:14:49,698 INFO ]: Initializing TraceAbstraction... [2018-06-22 15:14:49,701 INFO ]: TraceAbstraction initialized [2018-06-22 15:14:49,701 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 03:14:49" (1/3) ... [2018-06-22 15:14:49,702 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@741fde52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 03:14:49, skipping insertion in model container [2018-06-22 15:14:49,702 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:14:49" (2/3) ... [2018-06-22 15:14:49,702 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@741fde52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 03:14:49, skipping insertion in model container [2018-06-22 15:14:49,703 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 03:14:49" (3/3) ... [2018-06-22 15:14:49,704 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 15:14:49,713 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 15:14:49,720 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 15:14:49,762 INFO ]: Using default assertion order modulation [2018-06-22 15:14:49,762 INFO ]: Interprodecural is true [2018-06-22 15:14:49,762 INFO ]: Hoare is false [2018-06-22 15:14:49,762 INFO ]: Compute interpolants for FPandBP [2018-06-22 15:14:49,762 INFO ]: Backedges is TWOTRACK [2018-06-22 15:14:49,762 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 15:14:49,762 INFO ]: Difference is false [2018-06-22 15:14:49,763 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 15:14:49,763 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 15:14:49,776 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 15:14:49,801 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 15:14:49,801 INFO ]: Found error trace [2018-06-22 15:14:49,802 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:14:49,805 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:14:49,810 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-22 15:14:49,812 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:14:49,812 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:14:49,861 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:14:49,861 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:14:49,861 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:14:49,888 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:14:50,012 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 15:14:50,014 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 15:14:50,014 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 15:14:50,015 INFO ]: Interpolant automaton has 4 states [2018-06-22 15:14:50,026 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 15:14:50,026 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 15:14:50,028 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 15:14:50,114 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:14:50,114 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 15:14:50,115 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 15:14:50,116 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 15:14:50,117 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:14:50,133 INFO ]: With dead ends: 13 [2018-06-22 15:14:50,133 INFO ]: Without dead ends: 13 [2018-06-22 15:14:50,136 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 15:14:50,151 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 15:14:50,178 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 15:14:50,179 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 15:14:50,179 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 15:14:50,181 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 15:14:50,181 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:14:50,181 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 15:14:50,181 INFO ]: Interpolant automaton has 4 states. [2018-06-22 15:14:50,181 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 15:14:50,182 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 15:14:50,182 INFO ]: Found error trace [2018-06-22 15:14:50,182 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:14:50,182 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:14:50,182 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-22 15:14:50,183 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:14:50,183 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:14:50,183 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:14:50,183 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:14:50,183 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:14:50,223 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:14:50,408 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 15:14:50,408 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:14:50,408 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 15:14:50,419 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:14:50,452 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:14:50,459 INFO ]: Computing forward predicates... [2018-06-22 15:14:50,782 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 15:14:50,815 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:14:50,815 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-06-22 15:14:50,815 INFO ]: Interpolant automaton has 6 states [2018-06-22 15:14:50,816 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 15:14:50,816 INFO ]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-06-22 15:14:50,816 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 6 states. [2018-06-22 15:14:50,980 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:14:50,980 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 15:14:50,981 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 15:14:50,981 INFO ]: Start accepts. Automaton has 6 states. Word has length 13 [2018-06-22 15:14:50,981 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:14:50,982 INFO ]: With dead ends: 15 [2018-06-22 15:14:50,982 INFO ]: Without dead ends: 15 [2018-06-22 15:14:50,983 INFO ]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-06-22 15:14:50,983 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 15:14:50,987 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 15:14:50,987 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 15:14:50,988 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 15:14:50,988 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 15:14:50,988 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:14:50,988 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 15:14:50,988 INFO ]: Interpolant automaton has 6 states. [2018-06-22 15:14:50,988 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 15:14:50,989 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 15:14:50,989 INFO ]: Found error trace [2018-06-22 15:14:50,989 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:14:50,989 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:14:50,989 INFO ]: Analyzing trace with hash -1486246934, now seen corresponding path program 2 times [2018-06-22 15:14:50,989 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:14:50,989 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:14:50,992 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:14:50,992 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:14:50,992 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:14:51,066 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:14:51,514 WARN ]: Spent 175.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 12 [2018-06-22 15:14:51,703 WARN ]: Spent 133.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 6 [2018-06-22 15:14:51,731 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 15:14:51,731 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:14:51,731 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 15:14:51,748 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 15:14:51,788 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 15:14:51,788 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:14:51,791 INFO ]: Computing forward predicates... [2018-06-22 15:14:52,079 WARN ]: Spent 193.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 7 [2018-06-22 15:14:52,364 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 15:14:52,383 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:14:52,383 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2018-06-22 15:14:52,383 INFO ]: Interpolant automaton has 11 states [2018-06-22 15:14:52,383 INFO ]: Constructing interpolant automaton starting with 11 interpolants. [2018-06-22 15:14:52,384 INFO ]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2018-06-22 15:14:52,384 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 11 states. [2018-06-22 15:14:52,775 WARN ]: Spent 241.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2018-06-22 15:14:52,854 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:14:52,854 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 15:14:52,857 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 15:14:52,857 INFO ]: Start accepts. Automaton has 11 states. Word has length 17 [2018-06-22 15:14:52,858 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:14:52,858 INFO ]: With dead ends: 17 [2018-06-22 15:14:52,858 INFO ]: Without dead ends: 17 [2018-06-22 15:14:52,859 INFO ]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2018-06-22 15:14:52,859 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 15:14:52,862 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 15:14:52,862 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 15:14:52,862 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 15:14:52,862 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 15:14:52,862 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:14:52,863 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 15:14:52,863 INFO ]: Interpolant automaton has 11 states. [2018-06-22 15:14:52,863 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 15:14:52,863 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 15:14:52,863 INFO ]: Found error trace [2018-06-22 15:14:52,863 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:14:52,863 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:14:52,864 INFO ]: Analyzing trace with hash -2056434034, now seen corresponding path program 3 times [2018-06-22 15:14:52,864 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:14:52,864 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:14:52,865 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:14:52,865 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:14:52,865 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:14:52,893 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:14:53,100 WARN ]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2018-06-22 15:14:53,231 WARN ]: Spent 105.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2018-06-22 15:14:53,385 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 15:14:53,385 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:14:53,385 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 15:14:53,392 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 15:14:53,435 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 15:14:53,435 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:14:53,439 INFO ]: Computing forward predicates... [2018-06-22 15:14:54,683 WARN ]: Spent 903.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 29 [2018-06-22 15:14:55,044 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 15:14:55,067 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:14:55,067 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2018-06-22 15:14:55,068 INFO ]: Interpolant automaton has 15 states [2018-06-22 15:14:55,068 INFO ]: Constructing interpolant automaton starting with 15 interpolants. [2018-06-22 15:14:55,068 INFO ]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2018-06-22 15:14:55,068 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 15 states. [2018-06-22 15:14:55,269 WARN ]: Spent 186.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2018-06-22 15:14:55,516 WARN ]: Spent 102.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 29 [2018-06-22 15:14:55,727 WARN ]: Spent 195.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2018-06-22 15:14:55,752 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:14:55,752 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-22 15:14:55,753 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 15:14:55,754 INFO ]: Start accepts. Automaton has 15 states. Word has length 21 [2018-06-22 15:14:55,754 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:14:55,754 INFO ]: With dead ends: 19 [2018-06-22 15:14:55,754 INFO ]: Without dead ends: 19 [2018-06-22 15:14:55,755 INFO ]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2018-06-22 15:14:55,755 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 15:14:55,758 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 15:14:55,758 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 15:14:55,758 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-22 15:14:55,758 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-22 15:14:55,758 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:14:55,758 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-22 15:14:55,758 INFO ]: Interpolant automaton has 15 states. [2018-06-22 15:14:55,758 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-22 15:14:55,759 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 15:14:55,759 INFO ]: Found error trace [2018-06-22 15:14:55,759 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:14:55,759 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:14:55,760 INFO ]: Analyzing trace with hash -434924750, now seen corresponding path program 4 times [2018-06-22 15:14:55,760 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:14:55,760 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:14:55,760 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:14:55,760 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:14:55,760 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:14:55,792 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:14:56,266 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 15:14:56,266 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:14:56,266 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 15:14:56,271 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 15:14:56,299 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 15:14:56,299 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:14:56,303 INFO ]: Computing forward predicates... [2018-06-22 15:15:04,992 WARN ]: Spent 7.80 s on a formula simplification. DAG size of input: 802 DAG size of output: 123 [2018-06-22 15:15:05,459 WARN ]: Spent 241.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 22 [2018-06-22 15:15:07,554 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 15:15:07,573 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:15:07,573 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2018-06-22 15:15:07,573 INFO ]: Interpolant automaton has 16 states [2018-06-22 15:15:07,573 INFO ]: Constructing interpolant automaton starting with 16 interpolants. [2018-06-22 15:15:07,574 INFO ]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2018-06-22 15:15:07,574 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 16 states. [2018-06-22 15:15:09,158 WARN ]: Spent 1.55 s on a formula simplification. DAG size of input: 138 DAG size of output: 112 [2018-06-22 15:15:09,769 WARN ]: Spent 547.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 50 [2018-06-22 15:15:10,773 WARN ]: Spent 937.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 66 [2018-06-22 15:15:11,418 WARN ]: Spent 616.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 81 [2018-06-22 15:15:12,725 WARN ]: Spent 1.28 s on a formula simplification. DAG size of input: 138 DAG size of output: 81 [2018-06-22 15:15:12,755 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:15:12,755 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-22 15:15:12,758 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 15:15:12,758 INFO ]: Start accepts. Automaton has 16 states. Word has length 25 [2018-06-22 15:15:12,758 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:15:12,759 INFO ]: With dead ends: 21 [2018-06-22 15:15:12,759 INFO ]: Without dead ends: 21 [2018-06-22 15:15:12,759 INFO ]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2018-06-22 15:15:12,760 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-22 15:15:12,762 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-22 15:15:12,762 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-22 15:15:12,763 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-22 15:15:12,763 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 25 [2018-06-22 15:15:12,763 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:15:12,763 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-22 15:15:12,763 INFO ]: Interpolant automaton has 16 states. [2018-06-22 15:15:12,763 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-22 15:15:12,764 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 15:15:12,764 INFO ]: Found error trace [2018-06-22 15:15:12,764 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:15:12,764 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:15:12,764 INFO ]: Analyzing trace with hash 1986427350, now seen corresponding path program 5 times [2018-06-22 15:15:12,764 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:15:12,764 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:15:12,765 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:15:12,765 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:15:12,765 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:15:12,834 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:15:13,209 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 15:15:13,209 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:15:13,209 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 15:15:13,216 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 15:15:13,250 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-06-22 15:15:13,250 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:15:13,253 INFO ]: Computing forward predicates... [2018-06-22 15:15:15,966 WARN ]: Spent 2.29 s on a formula simplification. DAG size of input: 495 DAG size of output: 48 [2018-06-22 15:15:16,569 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 15:15:16,588 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:15:16,588 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2018-06-22 15:15:16,589 INFO ]: Interpolant automaton has 20 states [2018-06-22 15:15:16,589 INFO ]: Constructing interpolant automaton starting with 20 interpolants. [2018-06-22 15:15:16,589 INFO ]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2018-06-22 15:15:16,589 INFO ]: Start difference. First operand 21 states and 22 transitions. Second operand 20 states. [2018-06-22 15:15:17,203 WARN ]: Spent 527.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 62 [2018-06-22 15:15:17,377 WARN ]: Spent 108.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 19 [2018-06-22 15:15:17,548 WARN ]: Spent 139.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 26 [2018-06-22 15:15:17,869 WARN ]: Spent 297.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 34 [2018-06-22 15:15:18,103 WARN ]: Spent 211.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 35 [2018-06-22 15:15:18,387 WARN ]: Spent 257.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 43 [2018-06-22 15:15:18,416 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:15:18,417 INFO ]: Finished difference Result 23 states and 24 transitions. [2018-06-22 15:15:18,419 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 15:15:18,419 INFO ]: Start accepts. Automaton has 20 states. Word has length 29 [2018-06-22 15:15:18,419 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:15:18,420 INFO ]: With dead ends: 23 [2018-06-22 15:15:18,420 INFO ]: Without dead ends: 23 [2018-06-22 15:15:18,421 INFO ]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2018-06-22 15:15:18,421 INFO ]: Start minimizeSevpa. Operand 23 states. [2018-06-22 15:15:18,426 INFO ]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-06-22 15:15:18,426 INFO ]: Start removeUnreachable. Operand 23 states. [2018-06-22 15:15:18,427 INFO ]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-06-22 15:15:18,427 INFO ]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 29 [2018-06-22 15:15:18,427 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:15:18,427 INFO ]: Abstraction has 23 states and 24 transitions. [2018-06-22 15:15:18,427 INFO ]: Interpolant automaton has 20 states. [2018-06-22 15:15:18,427 INFO ]: Start isEmpty. Operand 23 states and 24 transitions. [2018-06-22 15:15:18,428 INFO ]: Finished isEmpty. Found accepting run of length 34 [2018-06-22 15:15:18,428 INFO ]: Found error trace [2018-06-22 15:15:18,428 INFO ]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:15:18,428 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:15:18,428 INFO ]: Analyzing trace with hash 800064122, now seen corresponding path program 6 times [2018-06-22 15:15:18,428 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:15:18,428 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:15:18,429 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:15:18,429 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:15:18,429 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:15:18,478 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:15:19,340 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 15:15:19,341 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:15:19,341 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 15:15:19,346 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 15:15:19,414 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-06-22 15:15:19,414 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:15:19,418 INFO ]: Computing forward predicates... [2018-06-22 15:15:19,592 WARN ]: Spent 131.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2018-06-22 15:15:20,182 WARN ]: Spent 119.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2018-06-22 15:15:22,912 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 15:15:22,943 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:15:22,943 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 26 [2018-06-22 15:15:22,943 INFO ]: Interpolant automaton has 26 states [2018-06-22 15:15:22,943 INFO ]: Constructing interpolant automaton starting with 26 interpolants. [2018-06-22 15:15:22,944 INFO ]: CoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2018-06-22 15:15:22,944 INFO ]: Start difference. First operand 23 states and 24 transitions. Second operand 26 states. [2018-06-22 15:15:23,469 WARN ]: Spent 480.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 74 [2018-06-22 15:15:23,749 WARN ]: Spent 216.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 34 [2018-06-22 15:15:24,022 WARN ]: Spent 245.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 47 [2018-06-22 15:15:24,414 WARN ]: Spent 361.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 50 [2018-06-22 15:15:24,698 WARN ]: Spent 252.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 48 [2018-06-22 15:15:25,003 WARN ]: Spent 268.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 49 [2018-06-22 15:15:25,364 WARN ]: Spent 283.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 52 [2018-06-22 15:15:25,400 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:15:25,400 INFO ]: Finished difference Result 25 states and 26 transitions. [2018-06-22 15:15:25,401 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-22 15:15:25,401 INFO ]: Start accepts. Automaton has 26 states. Word has length 33 [2018-06-22 15:15:25,402 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:15:25,402 INFO ]: With dead ends: 25 [2018-06-22 15:15:25,402 INFO ]: Without dead ends: 25 [2018-06-22 15:15:25,403 INFO ]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=184, Invalid=938, Unknown=0, NotChecked=0, Total=1122 [2018-06-22 15:15:25,403 INFO ]: Start minimizeSevpa. Operand 25 states. [2018-06-22 15:15:25,409 INFO ]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-06-22 15:15:25,409 INFO ]: Start removeUnreachable. Operand 25 states. [2018-06-22 15:15:25,410 INFO ]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-06-22 15:15:25,410 INFO ]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 33 [2018-06-22 15:15:25,410 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:15:25,410 INFO ]: Abstraction has 25 states and 26 transitions. [2018-06-22 15:15:25,410 INFO ]: Interpolant automaton has 26 states. [2018-06-22 15:15:25,410 INFO ]: Start isEmpty. Operand 25 states and 26 transitions. [2018-06-22 15:15:25,411 INFO ]: Finished isEmpty. Found accepting run of length 38 [2018-06-22 15:15:25,411 INFO ]: Found error trace [2018-06-22 15:15:25,411 INFO ]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:15:25,411 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:15:25,411 INFO ]: Analyzing trace with hash -411423458, now seen corresponding path program 7 times [2018-06-22 15:15:25,411 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:15:25,411 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:15:25,418 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:15:25,418 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:15:25,418 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:15:25,468 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:15:26,329 INFO ]: Checked inductivity of 105 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-22 15:15:26,329 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:15:26,329 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 15:15:26,335 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:15:26,399 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:15:26,405 INFO ]: Computing forward predicates... [2018-06-22 15:15:26,738 WARN ]: Spent 101.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2018-06-22 15:15:27,016 WARN ]: Spent 111.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2018-06-22 15:15:28,647 INFO ]: Checked inductivity of 105 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-22 15:15:28,667 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:15:28,667 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2018-06-22 15:15:28,667 INFO ]: Interpolant automaton has 29 states [2018-06-22 15:15:28,667 INFO ]: Constructing interpolant automaton starting with 29 interpolants. [2018-06-22 15:15:28,668 INFO ]: CoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2018-06-22 15:15:28,668 INFO ]: Start difference. First operand 25 states and 26 transitions. Second operand 29 states. [2018-06-22 15:15:29,404 WARN ]: Spent 703.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 80 [2018-06-22 15:15:29,698 WARN ]: Spent 238.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 33 [2018-06-22 15:15:30,030 WARN ]: Spent 295.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 41 [2018-06-22 15:15:30,462 WARN ]: Spent 369.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 47 [2018-06-22 15:15:30,777 WARN ]: Spent 281.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 44 [2018-06-22 15:15:31,128 WARN ]: Spent 316.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 39 [2018-06-22 15:15:31,445 WARN ]: Spent 284.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 40 [2018-06-22 15:15:31,858 WARN ]: Spent 376.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 60 [2018-06-22 15:15:31,908 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:15:31,909 INFO ]: Finished difference Result 27 states and 28 transitions. [2018-06-22 15:15:31,909 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-06-22 15:15:31,909 INFO ]: Start accepts. Automaton has 29 states. Word has length 37 [2018-06-22 15:15:31,910 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:15:31,910 INFO ]: With dead ends: 27 [2018-06-22 15:15:31,910 INFO ]: Without dead ends: 27 [2018-06-22 15:15:31,911 INFO ]: 0 DeclaredPredicates, 62 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=226, Invalid=1106, Unknown=0, NotChecked=0, Total=1332 [2018-06-22 15:15:31,911 INFO ]: Start minimizeSevpa. Operand 27 states. [2018-06-22 15:15:31,915 INFO ]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-06-22 15:15:31,915 INFO ]: Start removeUnreachable. Operand 27 states. [2018-06-22 15:15:31,915 INFO ]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-06-22 15:15:31,915 INFO ]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 37 [2018-06-22 15:15:31,915 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:15:31,915 INFO ]: Abstraction has 27 states and 28 transitions. [2018-06-22 15:15:31,915 INFO ]: Interpolant automaton has 29 states. [2018-06-22 15:15:31,916 INFO ]: Start isEmpty. Operand 27 states and 28 transitions. [2018-06-22 15:15:31,916 INFO ]: Finished isEmpty. Found accepting run of length 42 [2018-06-22 15:15:31,916 INFO ]: Found error trace [2018-06-22 15:15:31,916 INFO ]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:15:31,917 INFO ]: === Iteration 9 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:15:31,917 INFO ]: Analyzing trace with hash -544278078, now seen corresponding path program 8 times [2018-06-22 15:15:31,917 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:15:31,917 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:15:31,917 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:15:31,917 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:15:31,917 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:15:31,968 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:15:32,166 WARN ]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2018-06-22 15:15:32,604 WARN ]: Spent 392.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 25 [2018-06-22 15:15:33,194 INFO ]: Checked inductivity of 136 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-06-22 15:15:33,194 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:15:33,222 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 15:15:33,227 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 15:15:33,269 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 15:15:33,269 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:15:33,274 INFO ]: Computing forward predicates... [2018-06-22 15:15:33,460 WARN ]: Spent 136.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 21 [2018-06-22 15:15:33,619 WARN ]: Spent 132.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2018-06-22 15:15:33,817 WARN ]: Spent 151.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2018-06-22 15:15:34,088 WARN ]: Spent 141.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2018-06-22 15:15:34,240 WARN ]: Spent 114.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2018-06-22 15:15:35,114 INFO ]: Checked inductivity of 136 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-06-22 15:15:35,133 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:15:35,134 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 35 [2018-06-22 15:15:35,134 INFO ]: Interpolant automaton has 35 states [2018-06-22 15:15:35,134 INFO ]: Constructing interpolant automaton starting with 35 interpolants. [2018-06-22 15:15:35,134 INFO ]: CoverageRelationStatistics Valid=112, Invalid=1078, Unknown=0, NotChecked=0, Total=1190 [2018-06-22 15:15:35,135 INFO ]: Start difference. First operand 27 states and 28 transitions. Second operand 35 states. [2018-06-22 15:15:35,913 WARN ]: Spent 718.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 94 [2018-06-22 15:15:36,173 WARN ]: Spent 201.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 30 [2018-06-22 15:15:36,508 WARN ]: Spent 301.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 40 [2018-06-22 15:15:36,898 WARN ]: Spent 323.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 48 [2018-06-22 15:15:37,373 WARN ]: Spent 398.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 47 [2018-06-22 15:15:37,739 WARN ]: Spent 310.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 39 [2018-06-22 15:15:38,151 WARN ]: Spent 374.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 54 [2018-06-22 15:15:38,549 WARN ]: Spent 358.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 39 [2018-06-22 15:15:39,349 WARN ]: Spent 758.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 77 [2018-06-22 15:15:39,390 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:15:39,390 INFO ]: Finished difference Result 29 states and 30 transitions. [2018-06-22 15:15:39,390 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-06-22 15:15:39,390 INFO ]: Start accepts. Automaton has 35 states. Word has length 41 [2018-06-22 15:15:39,391 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:15:39,391 INFO ]: With dead ends: 29 [2018-06-22 15:15:39,391 INFO ]: Without dead ends: 29 [2018-06-22 15:15:39,392 INFO ]: 0 DeclaredPredicates, 69 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=316, Invalid=1576, Unknown=0, NotChecked=0, Total=1892 [2018-06-22 15:15:39,392 INFO ]: Start minimizeSevpa. Operand 29 states. [2018-06-22 15:15:39,396 INFO ]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-06-22 15:15:39,396 INFO ]: Start removeUnreachable. Operand 29 states. [2018-06-22 15:15:39,397 INFO ]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-06-22 15:15:39,397 INFO ]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 41 [2018-06-22 15:15:39,397 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:15:39,397 INFO ]: Abstraction has 29 states and 30 transitions. [2018-06-22 15:15:39,397 INFO ]: Interpolant automaton has 35 states. [2018-06-22 15:15:39,397 INFO ]: Start isEmpty. Operand 29 states and 30 transitions. [2018-06-22 15:15:39,398 INFO ]: Finished isEmpty. Found accepting run of length 46 [2018-06-22 15:15:39,398 INFO ]: Found error trace [2018-06-22 15:15:39,398 INFO ]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:15:39,398 INFO ]: === Iteration 10 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:15:39,398 INFO ]: Analyzing trace with hash 1442343014, now seen corresponding path program 9 times [2018-06-22 15:15:39,398 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:15:39,398 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:15:39,399 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:15:39,399 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:15:39,399 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:15:39,445 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:15:39,678 WARN ]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2018-06-22 15:15:40,336 WARN ]: Spent 613.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2018-06-22 15:15:40,958 INFO ]: Checked inductivity of 171 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-06-22 15:15:40,958 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:15:40,958 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 15:15:40,966 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 15:15:41,020 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-06-22 15:15:41,020 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:15:41,031 INFO ]: Computing forward predicates... [2018-06-22 15:15:41,212 WARN ]: Spent 123.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 23 [2018-06-22 15:15:42,166 WARN ]: Spent 872.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 60 [2018-06-22 15:15:42,366 WARN ]: Spent 159.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2018-06-22 15:15:42,575 WARN ]: Spent 168.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2018-06-22 15:15:42,781 WARN ]: Spent 167.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2018-06-22 15:15:42,922 WARN ]: Spent 106.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2018-06-22 15:15:43,101 WARN ]: Spent 135.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 26 [2018-06-22 15:15:45,878 INFO ]: Checked inductivity of 171 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-06-22 15:15:45,897 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:15:45,897 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 41 [2018-06-22 15:15:45,898 INFO ]: Interpolant automaton has 41 states [2018-06-22 15:15:45,898 INFO ]: Constructing interpolant automaton starting with 41 interpolants. [2018-06-22 15:15:45,898 INFO ]: CoverageRelationStatistics Valid=156, Invalid=1484, Unknown=0, NotChecked=0, Total=1640 [2018-06-22 15:15:45,899 INFO ]: Start difference. First operand 29 states and 30 transitions. Second operand 41 states. [2018-06-22 15:15:47,428 WARN ]: Spent 1.47 s on a formula simplification. DAG size of input: 180 DAG size of output: 129 [2018-06-22 15:15:47,908 WARN ]: Spent 397.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 38 [2018-06-22 15:15:48,603 WARN ]: Spent 646.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 51 [2018-06-22 15:15:49,331 WARN ]: Spent 674.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 66 [2018-06-22 15:15:49,968 WARN ]: Spent 577.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 48 Received shutdown request... [2018-06-22 15:15:50,746 WARN ]: Removed 10 from assertion stack [2018-06-22 15:15:50,746 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 15:15:50,747 WARN ]: Verification canceled [2018-06-22 15:15:50,750 WARN ]: Timeout [2018-06-22 15:15:50,750 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 03:15:50 BoogieIcfgContainer [2018-06-22 15:15:50,750 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 15:15:50,751 INFO ]: Toolchain (without parser) took 61407.38 ms. Allocated memory was 309.3 MB in the beginning and 777.5 MB in the end (delta: 468.2 MB). Free memory was 263.7 MB in the beginning and 258.3 MB in the end (delta: 5.5 MB). Peak memory consumption was 473.7 MB. Max. memory is 3.6 GB. [2018-06-22 15:15:50,751 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 309.3 MB. Free memory is still 274.8 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 15:15:50,751 INFO ]: ChcToBoogie took 51.41 ms. Allocated memory is still 309.3 MB. Free memory was 262.7 MB in the beginning and 261.7 MB in the end (delta: 996.2 kB). Peak memory consumption was 996.2 kB. Max. memory is 3.6 GB. [2018-06-22 15:15:50,751 INFO ]: Boogie Preprocessor took 51.82 ms. Allocated memory is still 309.3 MB. Free memory was 261.7 MB in the beginning and 259.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 3.6 GB. [2018-06-22 15:15:50,752 INFO ]: RCFGBuilder took 243.65 ms. Allocated memory is still 309.3 MB. Free memory was 259.6 MB in the beginning and 251.5 MB in the end (delta: 8.1 MB). Peak memory consumption was 8.1 MB. Max. memory is 3.6 GB. [2018-06-22 15:15:50,752 INFO ]: TraceAbstraction took 61051.54 ms. Allocated memory was 309.3 MB in the beginning and 777.5 MB in the end (delta: 468.2 MB). Free memory was 251.5 MB in the beginning and 258.3 MB in the end (delta: -6.8 MB). Peak memory consumption was 461.4 MB. Max. memory is 3.6 GB. [2018-06-22 15:15:50,759 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 309.3 MB. Free memory is still 274.8 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 51.41 ms. Allocated memory is still 309.3 MB. Free memory was 262.7 MB in the beginning and 261.7 MB in the end (delta: 996.2 kB). Peak memory consumption was 996.2 kB. Max. memory is 3.6 GB. * Boogie Preprocessor took 51.82 ms. Allocated memory is still 309.3 MB. Free memory was 261.7 MB in the beginning and 259.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 3.6 GB. * RCFGBuilder took 243.65 ms. Allocated memory is still 309.3 MB. Free memory was 259.6 MB in the beginning and 251.5 MB in the end (delta: 8.1 MB). Peak memory consumption was 8.1 MB. Max. memory is 3.6 GB. * TraceAbstraction took 61051.54 ms. Allocated memory was 309.3 MB in the beginning and 777.5 MB in the end (delta: 468.2 MB). Free memory was 251.5 MB in the beginning and 258.3 MB in the end (delta: -6.8 MB). Peak memory consumption was 461.4 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 (29states) and interpolant automaton (currently 9 states, 41 states before enhancement), while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 182. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 60.9s OverallTime, 10 OverallIterations, 10 TraceHistogramMax, 23.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 129 SDtfs, 458 SDslu, 1008 SDs, 0 SdLazy, 894 SolverSat, 560 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 433 GetRequests, 186 SyntacticMatches, 13 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1013 ImplicationChecksByTransitivity, 46.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=9, 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, 9 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 36.2s InterpolantComputationTime, 531 NumberOfCodeBlocks, 531 NumberOfCodeBlocksAsserted, 44 NumberOfCheckSat, 512 ConstructedInterpolants, 0 QuantifiedInterpolants, 6500812 SizeOfPredicates, 548 NumberOfNonLiveVariables, 1863 ConjunctsInSsa, 435 ConjunctsInUnsatCore, 19 InterpolantComputations, 1 PerfectInterpolantSequences, 330/1230 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/nested3.c.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_15-15-50-768.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/nested3.c.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_15-15-50-768.csv Completed graceful shutdown