java -Xss4m -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_Goto.epf -i /storage/chc-comp/vmt-chc-benchmarks/cav12/kundu.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-14921ce [2018-06-25 12:01:28,809 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-25 12:01:28,811 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-25 12:01:28,825 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-25 12:01:28,825 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-25 12:01:28,826 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-25 12:01:28,827 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-25 12:01:28,830 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-25 12:01:28,831 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-25 12:01:28,833 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-25 12:01:28,834 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-25 12:01:28,834 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-25 12:01:28,835 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-25 12:01:28,839 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-25 12:01:28,840 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-25 12:01:28,841 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-25 12:01:28,843 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-25 12:01:28,856 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-25 12:01:28,857 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-25 12:01:28,858 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-25 12:01:28,859 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-25 12:01:28,861 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-25 12:01:28,861 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-25 12:01:28,861 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-25 12:01:28,865 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-25 12:01:28,866 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-25 12:01:28,867 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-25 12:01:28,868 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-25 12:01:28,871 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-25 12:01:28,871 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-25 12:01:28,872 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-25 12:01:28,873 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-25 12:01:28,873 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-25 12:01:28,881 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-25 12:01:28,881 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-25 12:01:28,882 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-25 12:01:28,901 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-25 12:01:28,901 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-25 12:01:28,902 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-25 12:01:28,902 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-25 12:01:28,903 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-25 12:01:28,904 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-25 12:01:28,904 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-25 12:01:28,904 INFO L133 SettingsManager]: * Use SBE=true [2018-06-25 12:01:28,904 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-25 12:01:28,904 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-25 12:01:28,905 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-25 12:01:28,905 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-25 12:01:28,905 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-25 12:01:28,905 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-25 12:01:28,905 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-25 12:01:28,905 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-25 12:01:28,906 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-25 12:01:28,906 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-25 12:01:28,906 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-25 12:01:28,906 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-25 12:01:28,906 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-25 12:01:28,909 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-25 12:01:28,909 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-25 12:01:28,959 INFO ]: Repository-Root is: /tmp [2018-06-25 12:01:28,969 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-25 12:01:28,973 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-25 12:01:28,974 INFO ]: Initializing SmtParser... [2018-06-25 12:01:28,974 INFO ]: SmtParser initialized [2018-06-25 12:01:28,975 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/cav12/kundu.smt2 [2018-06-25 12:01:28,976 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 [2018-06-25 12:01:29,066 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/kundu.smt2 unknown [2018-06-25 12:01:29,880 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/kundu.smt2 [2018-06-25 12:01:29,893 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-25 12:01:29,905 INFO ]: Walking toolchain with 4 elements. [2018-06-25 12:01:29,905 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-25 12:01:29,905 INFO ]: Initializing ChcToBoogie... [2018-06-25 12:01:29,906 INFO ]: ChcToBoogie initialized [2018-06-25 12:01:29,909 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 12:01:29" (1/1) ... [2018-06-25 12:01:30,018 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:01:30 Unit [2018-06-25 12:01:30,018 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-25 12:01:30,019 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-25 12:01:30,019 INFO ]: Initializing Boogie Preprocessor... [2018-06-25 12:01:30,019 INFO ]: Boogie Preprocessor initialized [2018-06-25 12:01:30,039 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:01:30" (1/1) ... [2018-06-25 12:01:30,039 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:01:30" (1/1) ... [2018-06-25 12:01:30,061 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:01:30" (1/1) ... [2018-06-25 12:01:30,061 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:01:30" (1/1) ... [2018-06-25 12:01:30,098 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:01:30" (1/1) ... [2018-06-25 12:01:30,100 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:01:30" (1/1) ... [2018-06-25 12:01:30,103 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:01:30" (1/1) ... [2018-06-25 12:01:30,122 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-25 12:01:30,122 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-25 12:01:30,123 INFO ]: Initializing RCFGBuilder... [2018-06-25 12:01:30,123 INFO ]: RCFGBuilder initialized [2018-06-25 12:01:30,123 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:01:30" (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) [2018-06-25 12:01:30,138 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-25 12:01:30,138 INFO ]: Found specification of procedure gotoProc [2018-06-25 12:01:30,138 INFO ]: Found implementation of procedure gotoProc [2018-06-25 12:01:30,138 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-25 12:01:30,138 INFO ]: Found specification of procedure Ultimate.START [2018-06-25 12:01:30,138 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 [2018-06-25 12:01:30,714 INFO ]: Using library mode [2018-06-25 12:01:30,715 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 12:01:30 BoogieIcfgContainer [2018-06-25 12:01:30,715 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-25 12:01:30,716 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-25 12:01:30,716 INFO ]: Initializing TraceAbstraction... [2018-06-25 12:01:30,719 INFO ]: TraceAbstraction initialized [2018-06-25 12:01:30,719 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 12:01:29" (1/3) ... [2018-06-25 12:01:30,720 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c4492f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 25.06 12:01:30, skipping insertion in model container [2018-06-25 12:01:30,720 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:01:30" (2/3) ... [2018-06-25 12:01:30,720 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c4492f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.06 12:01:30, skipping insertion in model container [2018-06-25 12:01:30,720 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 12:01:30" (3/3) ... [2018-06-25 12:01:30,722 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-25 12:01:30,731 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-25 12:01:30,741 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-25 12:01:30,797 INFO ]: Using default assertion order modulation [2018-06-25 12:01:30,797 INFO ]: Interprodecural is true [2018-06-25 12:01:30,797 INFO ]: Hoare is false [2018-06-25 12:01:30,797 INFO ]: Compute interpolants for FPandBP [2018-06-25 12:01:30,797 INFO ]: Backedges is TWOTRACK [2018-06-25 12:01:30,797 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-25 12:01:30,797 INFO ]: Difference is false [2018-06-25 12:01:30,797 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-25 12:01:30,797 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-25 12:01:30,813 INFO ]: Start isEmpty. Operand 10 states. [2018-06-25 12:01:30,825 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-25 12:01:30,825 INFO ]: Found error trace [2018-06-25 12:01:30,826 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-25 12:01:30,827 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 12:01:30,834 INFO ]: Analyzing trace with hash 1285054476, now seen corresponding path program 1 times [2018-06-25 12:01:30,837 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 12:01:30,838 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 12:01:30,883 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 12:01:30,883 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 12:01:30,883 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 12:01:30,977 INFO ]: Conjunction of SSA is unsat [2018-06-25 12:01:31,122 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 12:01:31,125 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-25 12:01:31,125 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-25 12:01:31,127 INFO ]: Interpolant automaton has 3 states [2018-06-25 12:01:31,142 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-25 12:01:31,142 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 12:01:31,144 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-25 12:01:31,272 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 12:01:31,272 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-25 12:01:31,273 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-25 12:01:31,275 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-25 12:01:31,275 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 12:01:31,287 INFO ]: With dead ends: 9 [2018-06-25 12:01:31,287 INFO ]: Without dead ends: 9 [2018-06-25 12:01:31,289 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 12:01:31,306 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-25 12:01:31,331 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-25 12:01:31,332 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-25 12:01:31,333 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-25 12:01:31,334 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-25 12:01:31,334 INFO ]: Finished accepts. word is rejected. [2018-06-25 12:01:31,334 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-25 12:01:31,334 INFO ]: Interpolant automaton has 3 states. [2018-06-25 12:01:31,334 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-25 12:01:31,335 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-25 12:01:31,335 INFO ]: Found error trace [2018-06-25 12:01:31,335 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 12:01:31,335 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 12:01:31,335 INFO ]: Analyzing trace with hash 1180100628, now seen corresponding path program 1 times [2018-06-25 12:01:31,335 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 12:01:31,335 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 12:01:31,336 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 12:01:31,336 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 12:01:31,336 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 12:01:31,498 INFO ]: Conjunction of SSA is unsat [2018-06-25 12:01:31,817 WARN ]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 4 [2018-06-25 12:01:31,945 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 12:01:31,945 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 12:01:31,945 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 [2018-06-25 12:01:31,951 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 12:01:32,189 INFO ]: Conjunction of SSA is unsat [2018-06-25 12:01:32,204 INFO ]: Computing forward predicates... [2018-06-25 12:01:32,497 WARN ]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-06-25 12:01:33,248 WARN ]: Spent 353.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 10 [2018-06-25 12:01:33,262 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 12:01:33,296 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 12:01:33,296 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-06-25 12:01:33,296 INFO ]: Interpolant automaton has 6 states [2018-06-25 12:01:33,296 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-25 12:01:33,297 INFO ]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-06-25 12:01:33,297 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 6 states. [2018-06-25 12:01:33,491 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 12:01:33,522 INFO ]: Finished difference Result 10 states and 10 transitions. [2018-06-25 12:01:33,522 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-25 12:01:33,522 INFO ]: Start accepts. Automaton has 6 states. Word has length 8 [2018-06-25 12:01:33,522 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 12:01:33,523 INFO ]: With dead ends: 10 [2018-06-25 12:01:33,523 INFO ]: Without dead ends: 10 [2018-06-25 12:01:33,523 INFO ]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-06-25 12:01:33,523 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-25 12:01:33,525 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-25 12:01:33,525 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-25 12:01:33,525 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-06-25 12:01:33,525 INFO ]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-06-25 12:01:33,525 INFO ]: Finished accepts. word is rejected. [2018-06-25 12:01:33,525 INFO ]: Abstraction has 10 states and 10 transitions. [2018-06-25 12:01:33,525 INFO ]: Interpolant automaton has 6 states. [2018-06-25 12:01:33,525 INFO ]: Start isEmpty. Operand 10 states and 10 transitions. [2018-06-25 12:01:33,525 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-25 12:01:33,525 INFO ]: Found error trace [2018-06-25 12:01:33,526 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 12:01:33,526 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 12:01:33,526 INFO ]: Analyzing trace with hash -2073468660, now seen corresponding path program 2 times [2018-06-25 12:01:33,526 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 12:01:33,526 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 12:01:33,527 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 12:01:33,528 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 12:01:33,528 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 12:01:33,686 INFO ]: Conjunction of SSA is unsat [2018-06-25 12:01:33,967 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 12:01:33,967 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 12:01:33,967 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 [2018-06-25 12:01:33,976 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-25 12:01:34,167 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-25 12:01:34,168 INFO ]: Conjunction of SSA is unsat [2018-06-25 12:01:34,181 INFO ]: Computing forward predicates... [2018-06-25 12:01:34,887 WARN ]: Spent 466.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 10 [2018-06-25 12:01:36,137 WARN ]: Spent 101.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 17 [2018-06-25 12:01:36,140 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 12:01:36,161 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 12:01:36,161 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2018-06-25 12:01:36,161 INFO ]: Interpolant automaton has 8 states [2018-06-25 12:01:36,161 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-25 12:01:36,161 INFO ]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-06-25 12:01:36,161 INFO ]: Start difference. First operand 10 states and 10 transitions. Second operand 8 states. [2018-06-25 12:01:36,305 WARN ]: Spent 106.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2018-06-25 12:01:36,335 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 12:01:36,335 INFO ]: Finished difference Result 12 states and 12 transitions. [2018-06-25 12:01:36,336 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-25 12:01:36,336 INFO ]: Start accepts. Automaton has 8 states. Word has length 9 [2018-06-25 12:01:36,336 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 12:01:36,336 INFO ]: With dead ends: 12 [2018-06-25 12:01:36,336 INFO ]: Without dead ends: 12 [2018-06-25 12:01:36,338 INFO ]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2018-06-25 12:01:36,338 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-25 12:01:36,339 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-06-25 12:01:36,339 INFO ]: Start removeUnreachable. Operand 12 states. [2018-06-25 12:01:36,339 INFO ]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-06-25 12:01:36,339 INFO ]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2018-06-25 12:01:36,339 INFO ]: Finished accepts. word is rejected. [2018-06-25 12:01:36,339 INFO ]: Abstraction has 12 states and 12 transitions. [2018-06-25 12:01:36,340 INFO ]: Interpolant automaton has 8 states. [2018-06-25 12:01:36,340 INFO ]: Start isEmpty. Operand 12 states and 12 transitions. [2018-06-25 12:01:36,340 INFO ]: Finished isEmpty. Found accepting run of length 12 [2018-06-25 12:01:36,340 INFO ]: Found error trace [2018-06-25 12:01:36,340 INFO ]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 12:01:36,340 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 12:01:36,340 INFO ]: Analyzing trace with hash 201204236, now seen corresponding path program 3 times [2018-06-25 12:01:36,340 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 12:01:36,340 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 12:01:36,341 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 12:01:36,341 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 12:01:36,341 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 12:01:36,571 INFO ]: Conjunction of SSA is unsat [2018-06-25 12:01:37,371 WARN ]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-06-25 12:01:37,396 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 12:01:37,396 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 12:01:37,396 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 [2018-06-25 12:01:37,401 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-25 12:01:37,626 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-25 12:01:37,626 INFO ]: Conjunction of SSA is unsat [2018-06-25 12:01:37,645 INFO ]: Computing forward predicates... [2018-06-25 12:01:41,714 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 12:01:41,741 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 12:01:41,741 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2018-06-25 12:01:41,741 INFO ]: Interpolant automaton has 12 states [2018-06-25 12:01:41,741 INFO ]: Constructing interpolant automaton starting with 12 interpolants. [2018-06-25 12:01:41,742 INFO ]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2018-06-25 12:01:41,742 INFO ]: Start difference. First operand 12 states and 12 transitions. Second operand 12 states. [2018-06-25 12:01:42,162 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 12:01:42,162 INFO ]: Finished difference Result 13 states and 13 transitions. [2018-06-25 12:01:42,162 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-25 12:01:42,162 INFO ]: Start accepts. Automaton has 12 states. Word has length 11 [2018-06-25 12:01:42,162 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 12:01:42,162 INFO ]: With dead ends: 13 [2018-06-25 12:01:42,162 INFO ]: Without dead ends: 13 [2018-06-25 12:01:42,163 INFO ]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2018-06-25 12:01:42,163 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-25 12:01:42,164 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-25 12:01:42,164 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-25 12:01:42,165 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-06-25 12:01:42,165 INFO ]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-06-25 12:01:42,165 INFO ]: Finished accepts. word is rejected. [2018-06-25 12:01:42,165 INFO ]: Abstraction has 13 states and 13 transitions. [2018-06-25 12:01:42,165 INFO ]: Interpolant automaton has 12 states. [2018-06-25 12:01:42,165 INFO ]: Start isEmpty. Operand 13 states and 13 transitions. [2018-06-25 12:01:42,165 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-25 12:01:42,165 INFO ]: Found error trace [2018-06-25 12:01:42,165 INFO ]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 12:01:42,165 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 12:01:42,165 INFO ]: Analyzing trace with hash 1940481556, now seen corresponding path program 4 times [2018-06-25 12:01:42,165 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 12:01:42,166 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 12:01:42,170 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 12:01:42,170 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 12:01:42,170 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 12:01:42,617 INFO ]: Conjunction of SSA is unsat [2018-06-25 12:01:43,336 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 12:01:43,336 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 12:01:43,336 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) [2018-06-25 12:01:43,351 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown