java -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/chccomp2018/chcToBoogie_automizer.epf -i /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_2_e1_1116_e3_287.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-55b8104 [2018-06-18 16:06:02,034 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-18 16:06:02,036 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-18 16:06:02,048 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-18 16:06:02,048 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-18 16:06:02,049 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-18 16:06:02,051 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-18 16:06:02,052 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-18 16:06:02,054 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-18 16:06:02,055 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-18 16:06:02,055 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-18 16:06:02,056 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-18 16:06:02,057 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-18 16:06:02,058 INFO L177 SettingsManager]: ChcToBoogie provides no preferences, ignoring... [2018-06-18 16:06:02,058 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-18 16:06:02,059 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-18 16:06:02,061 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-18 16:06:02,063 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-18 16:06:02,064 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-18 16:06:02,066 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-18 16:06:02,067 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-18 16:06:02,069 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-18 16:06:02,070 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-18 16:06:02,070 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-18 16:06:02,071 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-18 16:06:02,072 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-18 16:06:02,073 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-18 16:06:02,073 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-18 16:06:02,075 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-18 16:06:02,075 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-18 16:06:02,076 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-18 16:06:02,077 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-18 16:06:02,077 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-18 16:06:02,078 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-18 16:06:02,078 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-18 16:06:02,079 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chccomp2018/chcToBoogie_automizer.epf [2018-06-18 16:06:02,098 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-18 16:06:02,099 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-18 16:06:02,099 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-18 16:06:02,099 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-18 16:06:02,101 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-18 16:06:02,101 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-18 16:06:02,101 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-18 16:06:02,101 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-18 16:06:02,102 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-18 16:06:02,102 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-18 16:06:02,102 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-18 16:06:02,102 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-18 16:06:02,102 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-18 16:06:02,103 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-18 16:06:02,103 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-18 16:06:02,103 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-18 16:06:02,103 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-18 16:06:02,104 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-18 16:06:02,105 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-18 16:06:02,160 INFO ]: Repository-Root is: /tmp [2018-06-18 16:06:02,178 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-18 16:06:02,184 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-18 16:06:02,185 INFO ]: Initializing SmtParser... [2018-06-18 16:06:02,185 INFO ]: SmtParser initialized [2018-06-18 16:06:02,186 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_2_e1_1116_e3_287.smt2 [2018-06-18 16:06:02,187 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 [2018-06-18 16:06:02,281 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_2_e1_1116_e3_287.smt2 unknown [2018-06-18 16:06:02,747 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_2_e1_1116_e3_287.smt2 [2018-06-18 16:06:02,751 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-18 16:06:02,757 INFO ]: Walking toolchain with 4 elements. [2018-06-18 16:06:02,757 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-18 16:06:02,757 INFO ]: Initializing ChcToBoogie... [2018-06-18 16:06:02,757 INFO ]: ChcToBoogie initialized [2018-06-18 16:06:02,764 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 04:06:02" (1/1) ... [2018-06-18 16:06:02,850 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:06:02 Unit [2018-06-18 16:06:02,850 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-18 16:06:02,851 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-18 16:06:02,851 INFO ]: Initializing Boogie Preprocessor... [2018-06-18 16:06:02,851 INFO ]: Boogie Preprocessor initialized [2018-06-18 16:06:02,890 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:06:02" (1/1) ... [2018-06-18 16:06:02,890 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:06:02" (1/1) ... [2018-06-18 16:06:02,908 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:06:02" (1/1) ... [2018-06-18 16:06:02,908 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:06:02" (1/1) ... [2018-06-18 16:06:02,916 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:06:02" (1/1) ... [2018-06-18 16:06:02,927 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:06:02" (1/1) ... [2018-06-18 16:06:02,929 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:06:02" (1/1) ... [2018-06-18 16:06:02,932 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-18 16:06:02,933 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-18 16:06:02,933 INFO ]: Initializing RCFGBuilder... [2018-06-18 16:06:02,933 INFO ]: RCFGBuilder initialized [2018-06-18 16:06:02,934 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:06:02" (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) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-18 16:06:02,952 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-18 16:06:02,952 INFO ]: Found specification of procedure False [2018-06-18 16:06:02,953 INFO ]: Found implementation of procedure False [2018-06-18 16:06:02,953 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-18 16:06:02,953 INFO ]: Found specification of procedure state [2018-06-18 16:06:02,953 INFO ]: Found implementation of procedure state [2018-06-18 16:06:02,953 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-18 16:06:02,953 INFO ]: Found specification of procedure Ultimate.START [2018-06-18 16:06:02,953 INFO ]: Found implementation of procedure Ultimate.START [2018-06-18 16:06:03,235 INFO ]: Using library mode [2018-06-18 16:06:03,235 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 04:06:03 BoogieIcfgContainer [2018-06-18 16:06:03,236 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-18 16:06:03,237 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-18 16:06:03,237 INFO ]: Initializing TraceAbstraction... [2018-06-18 16:06:03,241 INFO ]: TraceAbstraction initialized [2018-06-18 16:06:03,241 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 04:06:02" (1/3) ... [2018-06-18 16:06:03,242 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@432d9686 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 18.06 04:06:03, skipping insertion in model container [2018-06-18 16:06:03,242 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:06:02" (2/3) ... [2018-06-18 16:06:03,242 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@432d9686 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.06 04:06:03, skipping insertion in model container [2018-06-18 16:06:03,242 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 04:06:03" (3/3) ... [2018-06-18 16:06:03,244 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-18 16:06:03,254 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-18 16:06:03,263 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-18 16:06:03,312 INFO ]: Using default assertion order modulation [2018-06-18 16:06:03,313 INFO ]: Interprodecural is true [2018-06-18 16:06:03,313 INFO ]: Hoare is false [2018-06-18 16:06:03,313 INFO ]: Compute interpolants for FPandBP [2018-06-18 16:06:03,313 INFO ]: Backedges is TWOTRACK [2018-06-18 16:06:03,313 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-18 16:06:03,313 INFO ]: Difference is false [2018-06-18 16:06:03,313 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-18 16:06:03,313 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-18 16:06:03,331 INFO ]: Start isEmpty. Operand 13 states. [2018-06-18 16:06:03,351 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-18 16:06:03,351 INFO ]: Found error trace [2018-06-18 16:06:03,352 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 16:06:03,352 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 16:06:03,357 INFO ]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times [2018-06-18 16:06:03,359 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 16:06:03,360 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 16:06:03,399 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:06:03,399 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 16:06:03,399 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:06:03,489 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:06:03,501 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 16:06:03,657 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-18 16:06:03,660 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-18 16:06:03,660 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-18 16:06:03,662 INFO ]: Interpolant automaton has 4 states [2018-06-18 16:06:03,677 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-18 16:06:03,677 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-18 16:06:03,679 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-18 16:06:03,791 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 16:06:03,791 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-18 16:06:03,791 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-18 16:06:03,792 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-18 16:06:03,793 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 16:06:03,802 INFO ]: With dead ends: 13 [2018-06-18 16:06:03,802 INFO ]: Without dead ends: 13 [2018-06-18 16:06:03,804 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 [2018-06-18 16:06:03,817 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-18 16:06:03,836 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-18 16:06:03,838 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-18 16:06:03,838 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-18 16:06:03,840 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-18 16:06:03,840 INFO ]: Finished accepts. word is rejected. [2018-06-18 16:06:03,840 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-18 16:06:03,840 INFO ]: Interpolant automaton has 4 states. [2018-06-18 16:06:03,840 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-18 16:06:03,841 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-18 16:06:03,841 INFO ]: Found error trace [2018-06-18 16:06:03,841 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 16:06:03,842 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 16:06:03,842 INFO ]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times [2018-06-18 16:06:03,842 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 16:06:03,842 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 16:06:03,843 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:06:03,843 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 16:06:03,843 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:06:03,965 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:06:03,966 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 16:06:04,485 WARN ]: Spent 306.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2018-06-18 16:06:04,648 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 16:06:04,648 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 16:06:04,648 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 [2018-06-18 16:06:04,655 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 16:06:04,804 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:06:04,814 INFO ]: Computing forward predicates... [2018-06-18 16:06:05,187 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 16:06:05,225 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 16:06:05,225 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-06-18 16:06:05,226 INFO ]: Interpolant automaton has 8 states [2018-06-18 16:06:05,226 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-18 16:06:05,226 INFO ]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-06-18 16:06:05,226 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2018-06-18 16:06:05,540 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 16:06:05,540 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-18 16:06:05,542 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-18 16:06:05,542 INFO ]: Start accepts. Automaton has 8 states. Word has length 13 [2018-06-18 16:06:05,542 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 16:06:05,543 INFO ]: With dead ends: 15 [2018-06-18 16:06:05,543 INFO ]: Without dead ends: 15 [2018-06-18 16:06:05,544 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2018-06-18 16:06:05,544 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-18 16:06:05,547 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-18 16:06:05,547 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-18 16:06:05,547 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-18 16:06:05,547 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-18 16:06:05,547 INFO ]: Finished accepts. word is rejected. [2018-06-18 16:06:05,547 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-18 16:06:05,547 INFO ]: Interpolant automaton has 8 states. [2018-06-18 16:06:05,548 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-18 16:06:05,548 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-18 16:06:05,548 INFO ]: Found error trace [2018-06-18 16:06:05,548 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 16:06:05,548 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 16:06:05,548 INFO ]: Analyzing trace with hash -1649658231, now seen corresponding path program 2 times [2018-06-18 16:06:05,549 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 16:06:05,549 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 16:06:05,550 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:06:05,550 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 16:06:05,550 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:06:05,691 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:06:05,692 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 16:06:06,463 WARN ]: Spent 484.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2018-06-18 16:06:06,636 WARN ]: Spent 117.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2018-06-18 16:06:06,648 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-18 16:06:06,648 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 16:06:06,648 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 [2018-06-18 16:06:06,663 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-18 16:06:06,794 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-18 16:06:06,795 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:06:06,801 INFO ]: Computing forward predicates... [2018-06-18 16:06:07,052 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-18 16:06:07,072 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 16:06:07,072 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2018-06-18 16:06:07,072 INFO ]: Interpolant automaton has 13 states [2018-06-18 16:06:07,073 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-18 16:06:07,073 INFO ]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2018-06-18 16:06:07,073 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 13 states. [2018-06-18 16:06:07,529 WARN ]: Spent 259.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 110 [2018-06-18 16:06:07,684 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 16:06:07,684 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-18 16:06:07,686 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-18 16:06:07,686 INFO ]: Start accepts. Automaton has 13 states. Word has length 17 [2018-06-18 16:06:07,686 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 16:06:07,687 INFO ]: With dead ends: 17 [2018-06-18 16:06:07,687 INFO ]: Without dead ends: 17 [2018-06-18 16:06:07,688 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2018-06-18 16:06:07,688 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-18 16:06:07,691 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-18 16:06:07,691 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-18 16:06:07,691 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-18 16:06:07,691 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-18 16:06:07,691 INFO ]: Finished accepts. word is rejected. [2018-06-18 16:06:07,691 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-18 16:06:07,691 INFO ]: Interpolant automaton has 13 states. [2018-06-18 16:06:07,692 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-18 16:06:07,692 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-18 16:06:07,692 INFO ]: Found error trace [2018-06-18 16:06:07,692 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 16:06:07,692 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 16:06:07,692 INFO ]: Analyzing trace with hash 2119922091, now seen corresponding path program 3 times [2018-06-18 16:06:07,693 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 16:06:07,693 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 16:06:07,693 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:06:07,693 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 16:06:07,693 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:06:07,801 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:06:07,802 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 16:06:08,254 WARN ]: Spent 150.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 21 [2018-06-18 16:06:08,538 WARN ]: Spent 250.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 66 [2018-06-18 16:06:08,879 WARN ]: Spent 313.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 62 [2018-06-18 16:06:09,056 WARN ]: Spent 134.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2018-06-18 16:06:09,307 WARN ]: Spent 180.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 52 [2018-06-18 16:06:09,323 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-18 16:06:09,323 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 16:06:09,323 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 [2018-06-18 16:06:09,338 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-18 16:06:09,494 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-18 16:06:09,494 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:06:09,501 INFO ]: Computing forward predicates... [2018-06-18 16:06:10,033 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-18 16:06:10,054 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 16:06:10,054 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2018-06-18 16:06:10,054 INFO ]: Interpolant automaton has 17 states [2018-06-18 16:06:10,055 INFO ]: Constructing interpolant automaton starting with 17 interpolants. [2018-06-18 16:06:10,055 INFO ]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2018-06-18 16:06:10,055 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 17 states. [2018-06-18 16:06:10,405 WARN ]: Spent 266.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 145 [2018-06-18 16:06:10,921 WARN ]: Spent 429.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 165 [2018-06-18 16:06:11,265 WARN ]: Spent 302.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 143 [2018-06-18 16:06:11,535 WARN ]: Spent 225.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 125 [2018-06-18 16:06:11,599 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 16:06:11,600 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-18 16:06:11,600 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-18 16:06:11,600 INFO ]: Start accepts. Automaton has 17 states. Word has length 21 [2018-06-18 16:06:11,601 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 16:06:11,601 INFO ]: With dead ends: 19 [2018-06-18 16:06:11,601 INFO ]: Without dead ends: 19 [2018-06-18 16:06:11,602 INFO ]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2018-06-18 16:06:11,602 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-18 16:06:11,606 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-18 16:06:11,606 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-18 16:06:11,607 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-18 16:06:11,607 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-18 16:06:11,607 INFO ]: Finished accepts. word is rejected. [2018-06-18 16:06:11,607 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-18 16:06:11,607 INFO ]: Interpolant automaton has 17 states. [2018-06-18 16:06:11,607 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-18 16:06:11,608 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-18 16:06:11,608 INFO ]: Found error trace [2018-06-18 16:06:11,608 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 16:06:11,608 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 16:06:11,608 INFO ]: Analyzing trace with hash 1762711629, now seen corresponding path program 4 times [2018-06-18 16:06:11,608 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 16:06:11,608 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 16:06:11,609 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:06:11,609 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 16:06:11,609 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:06:11,782 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:06:11,786 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 16:06:12,900 WARN ]: Spent 611.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 22 [2018-06-18 16:06:13,288 WARN ]: Spent 373.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 61 [2018-06-18 16:06:13,840 WARN ]: Spent 530.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 49 [2018-06-18 16:06:14,233 WARN ]: Spent 316.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 65 [2018-06-18 16:06:14,539 WARN ]: Spent 184.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 45 [2018-06-18 16:06:15,031 WARN ]: Spent 395.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 33 [2018-06-18 16:06:15,671 WARN ]: Spent 536.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 38 [2018-06-18 16:06:15,691 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-18 16:06:15,691 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 16:06:15,691 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) [2018-06-18 16:06:15,707 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 [2018-06-18 16:06:15,904 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-18 16:06:15,904 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:06:15,911 INFO ]: Computing forward predicates... [2018-06-18 16:06:16,772 WARN ]: Spent 124.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2018-06-18 16:06:16,808 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-18 16:06:16,830 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 16:06:16,830 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2018-06-18 16:06:16,830 INFO ]: Interpolant automaton has 21 states [2018-06-18 16:06:16,830 INFO ]: Constructing interpolant automaton starting with 21 interpolants. [2018-06-18 16:06:16,830 INFO ]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2018-06-18 16:06:16,831 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 21 states. [2018-06-18 16:06:17,291 WARN ]: Spent 315.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 137 [2018-06-18 16:06:17,893 WARN ]: Spent 533.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 151 [2018-06-18 16:06:18,386 WARN ]: Spent 445.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 146 [2018-06-18 16:06:18,999 WARN ]: Spent 522.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 146 [2018-06-18 16:06:19,400 WARN ]: Spent 344.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 125 [2018-06-18 16:06:19,757 WARN ]: Spent 294.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 113 [2018-06-18 16:06:19,832 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 16:06:19,832 INFO ]: Finished difference Result 23 states and 24 transitions. [2018-06-18 16:06:19,832 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-18 16:06:19,832 INFO ]: Start accepts. Automaton has 21 states. Word has length 25 [2018-06-18 16:06:19,833 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 16:06:19,833 INFO ]: With dead ends: 23 [2018-06-18 16:06:19,833 INFO ]: Without dead ends: 23 [2018-06-18 16:06:19,834 INFO ]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=151, Invalid=605, Unknown=0, NotChecked=0, Total=756 [2018-06-18 16:06:19,834 INFO ]: Start minimizeSevpa. Operand 23 states. [2018-06-18 16:06:19,837 INFO ]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-06-18 16:06:19,837 INFO ]: Start removeUnreachable. Operand 23 states. [2018-06-18 16:06:19,838 INFO ]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-06-18 16:06:19,838 INFO ]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 25 [2018-06-18 16:06:19,838 INFO ]: Finished accepts. word is rejected. [2018-06-18 16:06:19,838 INFO ]: Abstraction has 23 states and 24 transitions. [2018-06-18 16:06:19,838 INFO ]: Interpolant automaton has 21 states. [2018-06-18 16:06:19,838 INFO ]: Start isEmpty. Operand 23 states and 24 transitions. [2018-06-18 16:06:19,839 INFO ]: Finished isEmpty. Found accepting run of length 34 [2018-06-18 16:06:19,839 INFO ]: Found error trace [2018-06-18 16:06:19,839 INFO ]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 16:06:19,839 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 16:06:19,839 INFO ]: Analyzing trace with hash -1661294575, now seen corresponding path program 5 times [2018-06-18 16:06:19,839 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 16:06:19,839 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 16:06:19,840 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:06:19,840 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 16:06:19,840 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:06:20,802 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:06:20,803 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown