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/lifnat.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 15:10:36,928 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 15:10:36,930 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 15:10:36,942 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 15:10:36,942 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 15:10:36,943 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 15:10:36,944 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 15:10:36,946 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 15:10:36,948 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 15:10:36,949 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 15:10:36,949 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 15:10:36,950 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 15:10:36,950 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 15:10:36,951 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 15:10:36,952 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 15:10:36,953 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 15:10:36,955 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 15:10:36,956 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 15:10:36,967 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 15:10:36,968 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 15:10:36,969 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 15:10:36,972 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 15:10:36,972 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 15:10:36,972 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 15:10:36,973 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 15:10:36,974 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 15:10:36,975 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 15:10:36,975 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 15:10:36,977 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 15:10:36,977 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 15:10:36,978 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 15:10:36,978 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 15:10:36,979 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 15:10:36,979 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 15:10:36,980 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 15:10:36,980 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 15:10:36,993 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 15:10:36,993 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 15:10:36,994 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 15:10:36,994 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 15:10:36,995 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 15:10:36,995 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 15:10:36,995 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 15:10:36,995 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 15:10:36,995 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 15:10:36,996 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 15:10:36,996 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 15:10:36,996 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 15:10:36,996 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 15:10:36,996 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 15:10:36,997 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 15:10:36,997 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 15:10:36,997 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 15:10:36,997 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 15:10:36,997 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 15:10:36,999 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 15:10:36,999 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 15:10:37,050 INFO ]: Repository-Root is: /tmp [2018-06-22 15:10:37,063 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 15:10:37,066 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 15:10:37,067 INFO ]: Initializing SmtParser... [2018-06-22 15:10:37,067 INFO ]: SmtParser initialized [2018-06-22 15:10:37,068 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/lifnat.c.smt2 [2018-06-22 15:10:37,069 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 15:10:37,159 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/lifnat.c.smt2 unknown [2018-06-22 15:10:37,755 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/lifnat.c.smt2 [2018-06-22 15:10:37,760 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 15:10:37,766 INFO ]: Walking toolchain with 4 elements. [2018-06-22 15:10:37,766 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 15:10:37,766 INFO ]: Initializing ChcToBoogie... [2018-06-22 15:10:37,766 INFO ]: ChcToBoogie initialized [2018-06-22 15:10:37,770 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 03:10:37" (1/1) ... [2018-06-22 15:10:37,826 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:10:37 Unit [2018-06-22 15:10:37,826 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 15:10:37,828 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 15:10:37,828 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 15:10:37,828 INFO ]: Boogie Preprocessor initialized [2018-06-22 15:10:37,852 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:10:37" (1/1) ... [2018-06-22 15:10:37,852 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:10:37" (1/1) ... [2018-06-22 15:10:37,873 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:10:37" (1/1) ... [2018-06-22 15:10:37,873 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:10:37" (1/1) ... [2018-06-22 15:10:37,900 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:10:37" (1/1) ... [2018-06-22 15:10:37,901 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:10:37" (1/1) ... [2018-06-22 15:10:37,906 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:10:37" (1/1) ... [2018-06-22 15:10:37,911 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 15:10:37,912 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 15:10:37,912 INFO ]: Initializing RCFGBuilder... [2018-06-22 15:10:37,912 INFO ]: RCFGBuilder initialized [2018-06-22 15:10:37,913 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:10:37" (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 15:10:37,922 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 15:10:37,922 INFO ]: Found specification of procedure False [2018-06-22 15:10:37,922 INFO ]: Found implementation of procedure False [2018-06-22 15:10:37,922 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 15:10:37,922 INFO ]: Found specification of procedure state [2018-06-22 15:10:37,922 INFO ]: Found implementation of procedure state [2018-06-22 15:10:37,922 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 15:10:37,922 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 15:10:37,922 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 15:10:38,335 INFO ]: Using library mode [2018-06-22 15:10:38,336 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 03:10:38 BoogieIcfgContainer [2018-06-22 15:10:38,336 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 15:10:38,337 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 15:10:38,337 INFO ]: Initializing TraceAbstraction... [2018-06-22 15:10:38,344 INFO ]: TraceAbstraction initialized [2018-06-22 15:10:38,345 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 03:10:37" (1/3) ... [2018-06-22 15:10:38,346 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3592b31e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 03:10:38, skipping insertion in model container [2018-06-22 15:10:38,346 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:10:37" (2/3) ... [2018-06-22 15:10:38,347 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3592b31e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 03:10:38, skipping insertion in model container [2018-06-22 15:10:38,347 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 03:10:38" (3/3) ... [2018-06-22 15:10:38,349 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 15:10:38,358 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 15:10:38,367 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 15:10:38,402 INFO ]: Using default assertion order modulation [2018-06-22 15:10:38,402 INFO ]: Interprodecural is true [2018-06-22 15:10:38,402 INFO ]: Hoare is false [2018-06-22 15:10:38,402 INFO ]: Compute interpolants for FPandBP [2018-06-22 15:10:38,402 INFO ]: Backedges is TWOTRACK [2018-06-22 15:10:38,402 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 15:10:38,402 INFO ]: Difference is false [2018-06-22 15:10:38,402 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 15:10:38,402 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 15:10:38,416 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 15:10:38,426 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 15:10:38,426 INFO ]: Found error trace [2018-06-22 15:10:38,427 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:10:38,427 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:10:38,433 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-22 15:10:38,435 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:10:38,436 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:10:38,469 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:10:38,469 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:10:38,469 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:10:38,508 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:10:38,655 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 15:10:38,657 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 15:10:38,657 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 15:10:38,658 INFO ]: Interpolant automaton has 4 states [2018-06-22 15:10:38,670 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 15:10:38,671 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 15:10:38,673 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 15:10:38,825 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:10:38,825 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 15:10:38,826 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 15:10:38,827 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 15:10:38,827 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:10:38,843 INFO ]: With dead ends: 13 [2018-06-22 15:10:38,843 INFO ]: Without dead ends: 13 [2018-06-22 15:10:38,845 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 15:10:38,863 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 15:10:38,896 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 15:10:38,897 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 15:10:38,898 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 15:10:38,899 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 15:10:38,899 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:10:38,899 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 15:10:38,900 INFO ]: Interpolant automaton has 4 states. [2018-06-22 15:10:38,900 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 15:10:38,901 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 15:10:38,901 INFO ]: Found error trace [2018-06-22 15:10:38,901 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:10:38,901 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:10:38,901 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-22 15:10:38,901 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:10:38,901 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:10:38,902 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:10:38,902 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:10:38,902 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:10:39,075 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:10:39,583 WARN ]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-06-22 15:10:39,823 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 15:10:39,823 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:10:39,823 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 15:10:39,831 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:10:39,916 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:10:39,927 INFO ]: Computing forward predicates... [2018-06-22 15:10:40,561 WARN ]: Spent 458.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 10 [2018-06-22 15:10:40,990 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 15:10:41,011 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:10:41,011 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-06-22 15:10:41,012 INFO ]: Interpolant automaton has 9 states [2018-06-22 15:10:41,012 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 15:10:41,012 INFO ]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-06-22 15:10:41,012 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 9 states. [2018-06-22 15:10:41,362 WARN ]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-06-22 15:10:41,625 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:10:41,625 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 15:10:41,625 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 15:10:41,625 INFO ]: Start accepts. Automaton has 9 states. Word has length 13 [2018-06-22 15:10:41,625 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:10:41,626 INFO ]: With dead ends: 15 [2018-06-22 15:10:41,626 INFO ]: Without dead ends: 15 [2018-06-22 15:10:41,627 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2018-06-22 15:10:41,627 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 15:10:41,630 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 15:10:41,630 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 15:10:41,630 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 15:10:41,630 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 15:10:41,631 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:10:41,631 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 15:10:41,631 INFO ]: Interpolant automaton has 9 states. [2018-06-22 15:10:41,631 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 15:10:41,631 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 15:10:41,631 INFO ]: Found error trace [2018-06-22 15:10:41,631 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:10:41,631 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:10:41,631 INFO ]: Analyzing trace with hash -1486246934, now seen corresponding path program 2 times [2018-06-22 15:10:41,631 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:10:41,631 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:10:41,632 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:10:41,632 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:10:41,632 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:10:41,809 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:10:42,790 WARN ]: Spent 681.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 11 [2018-06-22 15:10:43,497 WARN ]: Spent 627.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 21 [2018-06-22 15:10:43,617 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 15:10:43,617 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:10:43,617 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 15:10:43,625 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 15:10:43,718 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 15:10:43,718 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:10:43,723 INFO ]: Computing forward predicates... [2018-06-22 15:10:43,851 WARN ]: Spent 100.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 11 [2018-06-22 15:10:44,059 WARN ]: Spent 160.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2018-06-22 15:10:44,185 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 15:10:44,206 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:10:44,207 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2018-06-22 15:10:44,207 INFO ]: Interpolant automaton has 11 states [2018-06-22 15:10:44,207 INFO ]: Constructing interpolant automaton starting with 11 interpolants. [2018-06-22 15:10:44,207 INFO ]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2018-06-22 15:10:44,209 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 11 states. [2018-06-22 15:10:44,398 WARN ]: Spent 152.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2018-06-22 15:10:44,579 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:10:44,579 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 15:10:44,579 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 15:10:44,579 INFO ]: Start accepts. Automaton has 11 states. Word has length 17 [2018-06-22 15:10:44,579 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:10:44,580 INFO ]: With dead ends: 17 [2018-06-22 15:10:44,581 INFO ]: Without dead ends: 17 [2018-06-22 15:10:44,581 INFO ]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2018-06-22 15:10:44,581 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 15:10:44,584 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 15:10:44,584 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 15:10:44,584 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 15:10:44,584 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 15:10:44,584 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:10:44,584 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 15:10:44,585 INFO ]: Interpolant automaton has 11 states. [2018-06-22 15:10:44,585 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 15:10:44,585 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 15:10:44,585 INFO ]: Found error trace [2018-06-22 15:10:44,585 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:10:44,585 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:10:44,585 INFO ]: Analyzing trace with hash -2056434034, now seen corresponding path program 3 times [2018-06-22 15:10:44,586 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:10:44,586 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:10:44,586 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:10:44,586 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:10:44,586 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:10:44,691 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:10:45,495 WARN ]: Spent 181.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 13 [2018-06-22 15:10:45,504 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 15:10:45,504 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:10:45,504 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) [2018-06-22 15:10:45,517 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:10:45,660 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 15:10:45,660 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:10:45,691 INFO ]: Computing forward predicates... [2018-06-22 15:10:45,964 WARN ]: Spent 138.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2018-06-22 15:10:46,136 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 15:10:46,157 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:10:46,157 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2018-06-22 15:10:46,157 INFO ]: Interpolant automaton has 13 states [2018-06-22 15:10:46,157 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-22 15:10:46,157 INFO ]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2018-06-22 15:10:46,158 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 13 states. [2018-06-22 15:10:46,423 WARN ]: Spent 243.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2018-06-22 15:10:46,747 WARN ]: Spent 204.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2018-06-22 15:10:46,898 WARN ]: Spent 106.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2018-06-22 15:10:46,926 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:10:46,926 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-22 15:10:46,927 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 15:10:46,927 INFO ]: Start accepts. Automaton has 13 states. Word has length 21 [2018-06-22 15:10:46,927 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:10:46,928 INFO ]: With dead ends: 19 [2018-06-22 15:10:46,928 INFO ]: Without dead ends: 19 [2018-06-22 15:10:46,928 INFO ]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2018-06-22 15:10:46,928 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 15:10:46,932 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 15:10:46,932 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 15:10:46,933 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-22 15:10:46,933 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-22 15:10:46,933 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:10:46,933 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-22 15:10:46,933 INFO ]: Interpolant automaton has 13 states. [2018-06-22 15:10:46,933 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-22 15:10:46,934 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 15:10:46,934 INFO ]: Found error trace [2018-06-22 15:10:46,934 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:10:46,934 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:10:46,934 INFO ]: Analyzing trace with hash -434924750, now seen corresponding path program 4 times [2018-06-22 15:10:46,934 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:10:46,934 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:10:46,935 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:10:46,935 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:10:46,935 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:10:47,070 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:10:47,863 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 15:10:47,864 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:10:47,864 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 15:10:47,887 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 15:10:48,013 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 15:10:48,013 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:10:48,020 INFO ]: Computing forward predicates... [2018-06-22 15:10:48,212 WARN ]: Spent 102.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2018-06-22 15:10:48,537 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 15:10:48,556 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:10:48,556 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2018-06-22 15:10:48,556 INFO ]: Interpolant automaton has 15 states [2018-06-22 15:10:48,557 INFO ]: Constructing interpolant automaton starting with 15 interpolants. [2018-06-22 15:10:48,557 INFO ]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2018-06-22 15:10:48,557 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 15 states. [2018-06-22 15:10:49,006 WARN ]: Spent 400.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2018-06-22 15:10:49,458 WARN ]: Spent 294.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 28 [2018-06-22 15:10:49,585 WARN ]: Spent 110.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2018-06-22 15:10:49,764 WARN ]: Spent 161.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2018-06-22 15:10:49,800 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:10:49,800 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-22 15:10:49,807 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 15:10:49,807 INFO ]: Start accepts. Automaton has 15 states. Word has length 25 [2018-06-22 15:10:49,807 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:10:49,808 INFO ]: With dead ends: 21 [2018-06-22 15:10:49,808 INFO ]: Without dead ends: 21 [2018-06-22 15:10:49,808 INFO ]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2018-06-22 15:10:49,808 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-22 15:10:49,811 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-22 15:10:49,811 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-22 15:10:49,812 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-22 15:10:49,812 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 25 [2018-06-22 15:10:49,812 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:10:49,812 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-22 15:10:49,812 INFO ]: Interpolant automaton has 15 states. [2018-06-22 15:10:49,812 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-22 15:10:49,813 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 15:10:49,813 INFO ]: Found error trace [2018-06-22 15:10:49,813 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:10:49,813 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:10:49,813 INFO ]: Analyzing trace with hash 1986427350, now seen corresponding path program 5 times [2018-06-22 15:10:49,813 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:10:49,813 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:10:49,814 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:10:49,814 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:10:49,814 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:10:49,987 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:10:50,678 WARN ]: Spent 392.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 7 [2018-06-22 15:10:50,987 WARN ]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2018-06-22 15:10:51,247 WARN ]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2018-06-22 15:10:51,401 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 15:10:51,401 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:10:51,401 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 15:10:51,407 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 15:10:51,584 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-06-22 15:10:51,584 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:10:51,593 INFO ]: Computing forward predicates... [2018-06-22 15:10:51,875 WARN ]: Spent 103.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2018-06-22 15:10:52,023 WARN ]: Spent 123.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2018-06-22 15:10:53,138 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 15:10:53,158 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:10:53,158 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2018-06-22 15:10:53,159 INFO ]: Interpolant automaton has 19 states [2018-06-22 15:10:53,159 INFO ]: Constructing interpolant automaton starting with 19 interpolants. [2018-06-22 15:10:53,159 INFO ]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2018-06-22 15:10:53,159 INFO ]: Start difference. First operand 21 states and 22 transitions. Second operand 19 states. [2018-06-22 15:10:53,491 WARN ]: Spent 276.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2018-06-22 15:10:53,797 WARN ]: Spent 144.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 28 [2018-06-22 15:10:54,012 WARN ]: Spent 192.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 33 [2018-06-22 15:10:54,152 WARN ]: Spent 121.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 31 [2018-06-22 15:10:54,403 WARN ]: Spent 225.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 32 [2018-06-22 15:10:54,430 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:10:54,430 INFO ]: Finished difference Result 23 states and 24 transitions. [2018-06-22 15:10:54,430 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 15:10:54,430 INFO ]: Start accepts. Automaton has 19 states. Word has length 29 [2018-06-22 15:10:54,430 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:10:54,431 INFO ]: With dead ends: 23 [2018-06-22 15:10:54,431 INFO ]: Without dead ends: 23 [2018-06-22 15:10:54,431 INFO ]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2018-06-22 15:10:54,431 INFO ]: Start minimizeSevpa. Operand 23 states. [2018-06-22 15:10:54,435 INFO ]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-06-22 15:10:54,435 INFO ]: Start removeUnreachable. Operand 23 states. [2018-06-22 15:10:54,435 INFO ]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-06-22 15:10:54,435 INFO ]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 29 [2018-06-22 15:10:54,435 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:10:54,436 INFO ]: Abstraction has 23 states and 24 transitions. [2018-06-22 15:10:54,436 INFO ]: Interpolant automaton has 19 states. [2018-06-22 15:10:54,436 INFO ]: Start isEmpty. Operand 23 states and 24 transitions. [2018-06-22 15:10:54,436 INFO ]: Finished isEmpty. Found accepting run of length 34 [2018-06-22 15:10:54,436 INFO ]: Found error trace [2018-06-22 15:10:54,436 INFO ]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:10:54,436 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:10:54,437 INFO ]: Analyzing trace with hash 800064122, now seen corresponding path program 6 times [2018-06-22 15:10:54,437 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:10:54,437 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:10:54,437 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:10:54,437 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:10:54,437 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:10:54,594 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:10:55,027 WARN ]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-06-22 15:10:55,477 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 15:10:55,478 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:10:55,478 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 15:10:55,492 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 15:10:55,694 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-06-22 15:10:55,694 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:10:55,703 INFO ]: Computing forward predicates... [2018-06-22 15:10:55,859 WARN ]: Spent 123.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2018-06-22 15:10:56,424 WARN ]: Spent 112.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2018-06-22 15:10:56,900 WARN ]: Spent 171.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 28 [2018-06-22 15:10:57,657 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 15:10:57,688 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:10:57,688 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 20 [2018-06-22 15:10:57,689 INFO ]: Interpolant automaton has 20 states [2018-06-22 15:10:57,689 INFO ]: Constructing interpolant automaton starting with 20 interpolants. [2018-06-22 15:10:57,689 INFO ]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2018-06-22 15:10:57,689 INFO ]: Start difference. First operand 23 states and 24 transitions. Second operand 20 states. [2018-06-22 15:10:58,144 WARN ]: Spent 315.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2018-06-22 15:10:58,288 WARN ]: Spent 109.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 25 [2018-06-22 15:10:58,613 WARN ]: Spent 306.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2018-06-22 15:10:58,967 WARN ]: Spent 310.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2018-06-22 15:10:59,247 WARN ]: Spent 228.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2018-06-22 15:10:59,469 WARN ]: Spent 199.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2018-06-22 15:10:59,639 WARN ]: Spent 151.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2018-06-22 15:10:59,667 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:10:59,667 INFO ]: Finished difference Result 25 states and 26 transitions. [2018-06-22 15:10:59,668 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-22 15:10:59,668 INFO ]: Start accepts. Automaton has 20 states. Word has length 33 [2018-06-22 15:10:59,669 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:10:59,669 INFO ]: With dead ends: 25 [2018-06-22 15:10:59,669 INFO ]: Without dead ends: 25 [2018-06-22 15:10:59,670 INFO ]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2018-06-22 15:10:59,670 INFO ]: Start minimizeSevpa. Operand 25 states. [2018-06-22 15:10:59,673 INFO ]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-06-22 15:10:59,673 INFO ]: Start removeUnreachable. Operand 25 states. [2018-06-22 15:10:59,673 INFO ]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-06-22 15:10:59,673 INFO ]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 33 [2018-06-22 15:10:59,674 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:10:59,674 INFO ]: Abstraction has 25 states and 26 transitions. [2018-06-22 15:10:59,674 INFO ]: Interpolant automaton has 20 states. [2018-06-22 15:10:59,674 INFO ]: Start isEmpty. Operand 25 states and 26 transitions. [2018-06-22 15:10:59,675 INFO ]: Finished isEmpty. Found accepting run of length 38 [2018-06-22 15:10:59,675 INFO ]: Found error trace [2018-06-22 15:10:59,675 INFO ]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:10:59,675 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:10:59,675 INFO ]: Analyzing trace with hash -411423458, now seen corresponding path program 7 times [2018-06-22 15:10:59,675 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:10:59,675 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:10:59,676 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:10:59,676 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:10:59,676 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:10:59,829 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:11:00,842 WARN ]: Spent 714.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 10 [2018-06-22 15:11:01,332 INFO ]: Checked inductivity of 105 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-22 15:11:01,332 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:11:01,332 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 15:11:01,338 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:11:01,608 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:11:01,636 INFO ]: Computing forward predicates... Received shutdown request... [2018-06-22 15:11:38,087 INFO ]: Timeout while computing interpolants [2018-06-22 15:11:38,287 WARN ]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:11:38,287 WARN ]: Verification canceled [2018-06-22 15:11:38,291 WARN ]: Timeout [2018-06-22 15:11:38,291 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 03:11:38 BoogieIcfgContainer [2018-06-22 15:11:38,292 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 15:11:38,292 INFO ]: Toolchain (without parser) took 60531.76 ms. Allocated memory was 308.3 MB in the beginning and 1.7 GB in the end (delta: 1.4 GB). Free memory was 230.8 MB in the beginning and 586.2 MB in the end (delta: -355.3 MB). Peak memory consumption was 1.4 GB. Max. memory is 3.6 GB. [2018-06-22 15:11:38,293 INFO ]: SmtParser took 0.06 ms. Allocated memory is still 308.3 MB. Free memory is still 273.8 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 15:11:38,293 INFO ]: ChcToBoogie took 59.97 ms. Allocated memory is still 308.3 MB. Free memory was 230.8 MB in the beginning and 228.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 15:11:38,294 INFO ]: Boogie Preprocessor took 83.34 ms. Allocated memory is still 308.3 MB. Free memory was 228.8 MB in the beginning and 225.8 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. [2018-06-22 15:11:38,294 INFO ]: RCFGBuilder took 423.78 ms. Allocated memory is still 308.3 MB. Free memory was 225.8 MB in the beginning and 198.1 MB in the end (delta: 27.7 MB). Peak memory consumption was 27.7 MB. Max. memory is 3.6 GB. [2018-06-22 15:11:38,295 INFO ]: TraceAbstraction took 59954.32 ms. Allocated memory was 308.3 MB in the beginning and 1.7 GB in the end (delta: 1.4 GB). Free memory was 198.1 MB in the beginning and 586.2 MB in the end (delta: -388.0 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-22 15:11:38,298 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 308.3 MB. Free memory is still 273.8 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 59.97 ms. Allocated memory is still 308.3 MB. Free memory was 230.8 MB in the beginning and 228.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 83.34 ms. Allocated memory is still 308.3 MB. Free memory was 228.8 MB in the beginning and 225.8 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 423.78 ms. Allocated memory is still 308.3 MB. Free memory was 225.8 MB in the beginning and 198.1 MB in the end (delta: 27.7 MB). Peak memory consumption was 27.7 MB. Max. memory is 3.6 GB. * TraceAbstraction took 59954.32 ms. Allocated memory was 308.3 MB in the beginning and 1.7 GB in the end (delta: 1.4 GB). Free memory was 198.1 MB in the beginning and 586.2 MB in the end (delta: -388.0 MB). Peak memory consumption was 1.3 GB. 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 38 with TraceHistMax 8, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 5 quantified variables from 28 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 59.8s OverallTime, 8 OverallIterations, 8 TraceHistogramMax, 6.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 92 SDtfs, 162 SDslu, 425 SDs, 0 SdLazy, 386 SolverSat, 201 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 232 GetRequests, 108 SyntacticMatches, 17 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 14.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 1.6s SatisfiabilityAnalysisTime, 12.6s InterpolantComputationTime, 285 NumberOfCodeBlocks, 285 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 272 ConstructedInterpolants, 0 QuantifiedInterpolants, 88752 SizeOfPredicates, 497 NumberOfNonLiveVariables, 3900 ConjunctsInSsa, 266 ConjunctsInUnsatCore, 13 InterpolantComputations, 1 PerfectInterpolantSequences, 112/406 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/lifnat.c.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_15-11-38-309.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/lifnat.c.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_15-11-38-309.csv Completed graceful shutdown