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_4_e3_1091_e4_232.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-55b8104 [2018-06-18 16:18:46,005 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-18 16:18:46,008 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-18 16:18:46,022 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-18 16:18:46,023 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-18 16:18:46,024 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-18 16:18:46,025 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-18 16:18:46,029 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-18 16:18:46,031 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-18 16:18:46,031 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-18 16:18:46,033 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-18 16:18:46,034 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-18 16:18:46,034 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-18 16:18:46,035 INFO L177 SettingsManager]: ChcToBoogie provides no preferences, ignoring... [2018-06-18 16:18:46,036 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-18 16:18:46,036 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-18 16:18:46,041 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-18 16:18:46,043 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-18 16:18:46,057 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-18 16:18:46,058 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-18 16:18:46,059 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-18 16:18:46,061 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-18 16:18:46,061 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-18 16:18:46,061 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-18 16:18:46,062 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-18 16:18:46,063 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-18 16:18:46,064 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-18 16:18:46,064 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-18 16:18:46,070 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-18 16:18:46,071 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-18 16:18:46,071 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-18 16:18:46,072 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-18 16:18:46,072 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-18 16:18:46,073 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-18 16:18:46,073 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-18 16:18:46,073 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chccomp2018/chcToBoogie_automizer.epf [2018-06-18 16:18:46,098 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-18 16:18:46,099 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-18 16:18:46,099 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-18 16:18:46,099 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-18 16:18:46,101 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-18 16:18:46,102 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-18 16:18:46,102 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-18 16:18:46,102 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-18 16:18:46,102 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-18 16:18:46,102 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-18 16:18:46,102 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-18 16:18:46,103 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-18 16:18:46,103 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-18 16:18:46,103 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-18 16:18:46,103 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-18 16:18:46,103 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-18 16:18:46,103 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-18 16:18:46,106 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-18 16:18:46,106 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-18 16:18:46,157 INFO ]: Repository-Root is: /tmp [2018-06-18 16:18:46,171 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-18 16:18:46,176 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-18 16:18:46,177 INFO ]: Initializing SmtParser... [2018-06-18 16:18:46,177 INFO ]: SmtParser initialized [2018-06-18 16:18:46,178 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_4_e3_1091_e4_232.smt2 [2018-06-18 16:18:46,179 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 16:18:46,273 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_4_e3_1091_e4_232.smt2 unknown [2018-06-18 16:18:46,753 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_4_e3_1091_e4_232.smt2 [2018-06-18 16:18:46,757 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-18 16:18:46,771 INFO ]: Walking toolchain with 4 elements. [2018-06-18 16:18:46,771 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-18 16:18:46,771 INFO ]: Initializing ChcToBoogie... [2018-06-18 16:18:46,772 INFO ]: ChcToBoogie initialized [2018-06-18 16:18:46,787 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 04:18:46" (1/1) ... [2018-06-18 16:18:46,892 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:18:46 Unit [2018-06-18 16:18:46,892 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-18 16:18:46,892 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-18 16:18:46,892 INFO ]: Initializing Boogie Preprocessor... [2018-06-18 16:18:46,892 INFO ]: Boogie Preprocessor initialized [2018-06-18 16:18:46,914 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:18:46" (1/1) ... [2018-06-18 16:18:46,914 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:18:46" (1/1) ... [2018-06-18 16:18:46,928 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:18:46" (1/1) ... [2018-06-18 16:18:46,928 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:18:46" (1/1) ... [2018-06-18 16:18:46,946 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:18:46" (1/1) ... [2018-06-18 16:18:46,947 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:18:46" (1/1) ... [2018-06-18 16:18:46,949 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:18:46" (1/1) ... [2018-06-18 16:18:46,961 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-18 16:18:46,961 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-18 16:18:46,961 INFO ]: Initializing RCFGBuilder... [2018-06-18 16:18:46,961 INFO ]: RCFGBuilder initialized [2018-06-18 16:18:46,962 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:18:46" (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) [2018-06-18 16:18:46,978 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-18 16:18:46,978 INFO ]: Found specification of procedure False [2018-06-18 16:18:46,978 INFO ]: Found implementation of procedure False [2018-06-18 16:18:46,978 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-18 16:18:46,978 INFO ]: Found specification of procedure state [2018-06-18 16:18:46,978 INFO ]: Found implementation of procedure state [2018-06-18 16:18:46,978 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-18 16:18:46,978 INFO ]: Found specification of procedure Ultimate.START [2018-06-18 16:18:46,978 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 [2018-06-18 16:18:47,314 INFO ]: Using library mode [2018-06-18 16:18:47,315 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 04:18:47 BoogieIcfgContainer [2018-06-18 16:18:47,315 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-18 16:18:47,316 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-18 16:18:47,316 INFO ]: Initializing TraceAbstraction... [2018-06-18 16:18:47,320 INFO ]: TraceAbstraction initialized [2018-06-18 16:18:47,320 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 04:18:46" (1/3) ... [2018-06-18 16:18:47,321 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 04:18:47, skipping insertion in model container [2018-06-18 16:18:47,321 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:18:46" (2/3) ... [2018-06-18 16:18:47,321 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 04:18:47, skipping insertion in model container [2018-06-18 16:18:47,321 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 04:18:47" (3/3) ... [2018-06-18 16:18:47,323 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-18 16:18:47,332 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-18 16:18:47,341 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-18 16:18:47,386 INFO ]: Using default assertion order modulation [2018-06-18 16:18:47,386 INFO ]: Interprodecural is true [2018-06-18 16:18:47,386 INFO ]: Hoare is false [2018-06-18 16:18:47,386 INFO ]: Compute interpolants for FPandBP [2018-06-18 16:18:47,386 INFO ]: Backedges is TWOTRACK [2018-06-18 16:18:47,386 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-18 16:18:47,386 INFO ]: Difference is false [2018-06-18 16:18:47,386 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-18 16:18:47,386 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-18 16:18:47,399 INFO ]: Start isEmpty. Operand 13 states. [2018-06-18 16:18:47,412 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-18 16:18:47,413 INFO ]: Found error trace [2018-06-18 16:18:47,414 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 16:18:47,414 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 16:18:47,420 INFO ]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times [2018-06-18 16:18:47,422 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 16:18:47,422 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 16:18:47,458 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:18:47,458 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 16:18:47,458 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:18:47,555 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:18:47,564 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 16:18:47,688 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-18 16:18:47,691 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-18 16:18:47,691 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-18 16:18:47,693 INFO ]: Interpolant automaton has 4 states [2018-06-18 16:18:47,706 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-18 16:18:47,707 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-18 16:18:47,709 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-18 16:18:47,855 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 16:18:47,855 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-18 16:18:47,856 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-18 16:18:47,857 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-18 16:18:47,857 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 16:18:47,878 INFO ]: With dead ends: 13 [2018-06-18 16:18:47,878 INFO ]: Without dead ends: 13 [2018-06-18 16:18:47,880 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 16:18:47,908 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-18 16:18:47,939 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-18 16:18:47,941 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-18 16:18:47,941 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-18 16:18:47,942 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-18 16:18:47,943 INFO ]: Finished accepts. word is rejected. [2018-06-18 16:18:47,943 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-18 16:18:47,943 INFO ]: Interpolant automaton has 4 states. [2018-06-18 16:18:47,943 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-18 16:18:47,944 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-18 16:18:47,944 INFO ]: Found error trace [2018-06-18 16:18:47,944 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 16:18:47,944 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 16:18:47,945 INFO ]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times [2018-06-18 16:18:47,945 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 16:18:47,945 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 16:18:47,945 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:18:47,945 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 16:18:47,946 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:18:48,026 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:18:48,027 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 16:18:48,385 WARN ]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-06-18 16:18:48,482 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 16:18:48,482 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 16:18:48,482 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 16:18:48,492 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 16:18:48,627 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:18:48,638 INFO ]: Computing forward predicates... [2018-06-18 16:18:48,946 WARN ]: Spent 223.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 7 [2018-06-18 16:18:49,182 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 16:18:49,205 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 16:18:49,205 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-06-18 16:18:49,206 INFO ]: Interpolant automaton has 9 states [2018-06-18 16:18:49,206 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-18 16:18:49,207 INFO ]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-06-18 16:18:49,207 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 9 states. [2018-06-18 16:18:49,524 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 16:18:49,524 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-18 16:18:49,525 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-18 16:18:49,525 INFO ]: Start accepts. Automaton has 9 states. Word has length 13 [2018-06-18 16:18:49,525 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 16:18:49,525 INFO ]: With dead ends: 15 [2018-06-18 16:18:49,525 INFO ]: Without dead ends: 15 [2018-06-18 16:18:49,526 INFO ]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2018-06-18 16:18:49,526 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-18 16:18:49,529 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-18 16:18:49,529 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-18 16:18:49,529 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-18 16:18:49,530 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-18 16:18:49,530 INFO ]: Finished accepts. word is rejected. [2018-06-18 16:18:49,530 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-18 16:18:49,530 INFO ]: Interpolant automaton has 9 states. [2018-06-18 16:18:49,530 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-18 16:18:49,530 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-18 16:18:49,530 INFO ]: Found error trace [2018-06-18 16:18:49,530 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 16:18:49,531 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 16:18:49,531 INFO ]: Analyzing trace with hash -1649658231, now seen corresponding path program 2 times [2018-06-18 16:18:49,531 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 16:18:49,531 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 16:18:49,532 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:18:49,532 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 16:18:49,532 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:18:49,676 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:18:49,677 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 16:18:50,120 WARN ]: Spent 158.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 10 [2018-06-18 16:18:50,304 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-18 16:18:50,304 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 16:18:50,304 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 16:18:50,314 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-18 16:18:50,440 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-18 16:18:50,440 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:18:50,447 INFO ]: Computing forward predicates... [2018-06-18 16:18:50,863 WARN ]: Spent 216.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 7 [2018-06-18 16:18:51,322 WARN ]: Spent 119.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 8 [2018-06-18 16:18:51,462 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-18 16:18:51,483 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 16:18:51,483 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2018-06-18 16:18:51,483 INFO ]: Interpolant automaton has 13 states [2018-06-18 16:18:51,483 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-18 16:18:51,483 INFO ]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2018-06-18 16:18:51,484 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 13 states. [2018-06-18 16:18:51,745 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 16:18:51,745 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-18 16:18:51,746 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-18 16:18:51,746 INFO ]: Start accepts. Automaton has 13 states. Word has length 17 [2018-06-18 16:18:51,746 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 16:18:51,746 INFO ]: With dead ends: 17 [2018-06-18 16:18:51,746 INFO ]: Without dead ends: 17 [2018-06-18 16:18:51,747 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2018-06-18 16:18:51,747 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-18 16:18:51,750 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-18 16:18:51,750 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-18 16:18:51,751 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-18 16:18:51,751 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-18 16:18:51,751 INFO ]: Finished accepts. word is rejected. [2018-06-18 16:18:51,751 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-18 16:18:51,751 INFO ]: Interpolant automaton has 13 states. [2018-06-18 16:18:51,751 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-18 16:18:51,752 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-18 16:18:51,752 INFO ]: Found error trace [2018-06-18 16:18:51,752 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 16:18:51,752 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 16:18:51,752 INFO ]: Analyzing trace with hash 2119922091, now seen corresponding path program 3 times [2018-06-18 16:18:51,752 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 16:18:51,752 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 16:18:51,753 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:18:51,753 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 16:18:51,753 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:18:51,951 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:18:51,954 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 16:18:52,575 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-18 16:18:52,575 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 16:18:52,575 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 16:18:52,592 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-18 16:18:52,742 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-18 16:18:52,742 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:18:52,750 INFO ]: Computing forward predicates... [2018-06-18 16:18:53,011 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-18 16:18:53,037 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 16:18:53,037 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2018-06-18 16:18:53,037 INFO ]: Interpolant automaton has 17 states [2018-06-18 16:18:53,038 INFO ]: Constructing interpolant automaton starting with 17 interpolants. [2018-06-18 16:18:53,038 INFO ]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2018-06-18 16:18:53,038 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 17 states. [2018-06-18 16:18:53,476 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 16:18:53,476 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-18 16:18:53,477 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-18 16:18:53,477 INFO ]: Start accepts. Automaton has 17 states. Word has length 21 [2018-06-18 16:18:53,477 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 16:18:53,478 INFO ]: With dead ends: 19 [2018-06-18 16:18:53,478 INFO ]: Without dead ends: 19 [2018-06-18 16:18:53,478 INFO ]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2018-06-18 16:18:53,478 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-18 16:18:53,481 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-18 16:18:53,481 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-18 16:18:53,482 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-18 16:18:53,482 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-18 16:18:53,482 INFO ]: Finished accepts. word is rejected. [2018-06-18 16:18:53,482 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-18 16:18:53,482 INFO ]: Interpolant automaton has 17 states. [2018-06-18 16:18:53,482 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-18 16:18:53,483 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-18 16:18:53,483 INFO ]: Found error trace [2018-06-18 16:18:53,484 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 16:18:53,484 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 16:18:53,484 INFO ]: Analyzing trace with hash 1762711629, now seen corresponding path program 4 times [2018-06-18 16:18:53,484 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 16:18:53,484 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 16:18:53,485 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:18:53,485 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 16:18:53,485 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:18:53,665 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:18:53,666 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 16:18:54,109 WARN ]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-06-18 16:18:54,532 WARN ]: Spent 343.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 26 [2018-06-18 16:18:54,701 WARN ]: Spent 129.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 27 [2018-06-18 16:18:55,080 WARN ]: Spent 173.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 25 [2018-06-18 16:18:55,354 WARN ]: Spent 255.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 19 [2018-06-18 16:18:55,368 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-18 16:18:55,368 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 16:18:55,368 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 [2018-06-18 16:18:55,374 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-18 16:18:55,542 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-18 16:18:55,542 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:18:55,550 INFO ]: Computing forward predicates... [2018-06-18 16:18:56,148 INFO ]: Checked inductivity of 36 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-06-18 16:18:56,169 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 16:18:56,169 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2018-06-18 16:18:56,169 INFO ]: Interpolant automaton has 20 states [2018-06-18 16:18:56,170 INFO ]: Constructing interpolant automaton starting with 20 interpolants. [2018-06-18 16:18:56,170 INFO ]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2018-06-18 16:18:56,170 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 20 states. [2018-06-18 16:18:56,546 WARN ]: Spent 159.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 78 [2018-06-18 16:18:56,775 WARN ]: Spent 196.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 70 [2018-06-18 16:18:56,935 WARN ]: Spent 114.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2018-06-18 16:18:57,099 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 16:18:57,099 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-18 16:18:57,099 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-18 16:18:57,100 INFO ]: Start accepts. Automaton has 20 states. Word has length 25 [2018-06-18 16:18:57,100 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 16:18:57,100 INFO ]: With dead ends: 21 [2018-06-18 16:18:57,100 INFO ]: Without dead ends: 21 [2018-06-18 16:18:57,101 INFO ]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2018-06-18 16:18:57,101 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-18 16:18:57,104 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-18 16:18:57,104 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-18 16:18:57,105 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-18 16:18:57,105 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 25 [2018-06-18 16:18:57,105 INFO ]: Finished accepts. word is rejected. [2018-06-18 16:18:57,105 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-18 16:18:57,105 INFO ]: Interpolant automaton has 20 states. [2018-06-18 16:18:57,105 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-18 16:18:57,106 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-18 16:18:57,106 INFO ]: Found error trace [2018-06-18 16:18:57,106 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 16:18:57,106 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 16:18:57,106 INFO ]: Analyzing trace with hash 853117551, now seen corresponding path program 5 times [2018-06-18 16:18:57,106 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 16:18:57,106 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 16:18:57,107 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:18:57,107 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 16:18:57,107 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:18:57,399 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:18:57,401 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 16:18:58,878 WARN ]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-06-18 16:18:59,622 WARN ]: Spent 642.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 26 [2018-06-18 16:18:59,824 WARN ]: Spent 174.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 19 [2018-06-18 16:19:00,189 WARN ]: Spent 334.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 34 [2018-06-18 16:19:00,768 WARN ]: Spent 524.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 63 [2018-06-18 16:19:01,269 WARN ]: Spent 349.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 39 [2018-06-18 16:19:01,697 WARN ]: Spent 196.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 13 [2018-06-18 16:19:02,255 WARN ]: Spent 435.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 18 [2018-06-18 16:19:02,801 WARN ]: Spent 401.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 16 [2018-06-18 16:19:02,818 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-18 16:19:02,819 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 16:19:02,819 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 [2018-06-18 16:19:02,828 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-18 16:19:03,104 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-06-18 16:19:03,105 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:19:03,120 INFO ]: Computing forward predicates... [2018-06-18 16:19:03,690 INFO ]: Checked inductivity of 55 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-06-18 16:19:03,713 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 16:19:03,713 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2018-06-18 16:19:03,713 INFO ]: Interpolant automaton has 24 states [2018-06-18 16:19:03,713 INFO ]: Constructing interpolant automaton starting with 24 interpolants. [2018-06-18 16:19:03,713 INFO ]: CoverageRelationStatistics Valid=53, Invalid=499, Unknown=0, NotChecked=0, Total=552 [2018-06-18 16:19:03,713 INFO ]: Start difference. First operand 21 states and 22 transitions. Second operand 24 states. [2018-06-18 16:19:04,025 WARN ]: Spent 215.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 121 [2018-06-18 16:19:04,378 WARN ]: Spent 285.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 131 [2018-06-18 16:19:04,937 WARN ]: Spent 379.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 119 [2018-06-18 16:19:05,228 WARN ]: Spent 252.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 132 [2018-06-18 16:19:05,651 WARN ]: Spent 378.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 132 [2018-06-18 16:19:05,927 WARN ]: Spent 226.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 126 [2018-06-18 16:19:06,192 WARN ]: Spent 213.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 119 [2018-06-18 16:19:06,444 WARN ]: Spent 196.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 111 [2018-06-18 16:19:06,493 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 16:19:06,494 INFO ]: Finished difference Result 27 states and 28 transitions. [2018-06-18 16:19:06,499 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-06-18 16:19:06,499 INFO ]: Start accepts. Automaton has 24 states. Word has length 29 [2018-06-18 16:19:06,499 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 16:19:06,500 INFO ]: With dead ends: 27 [2018-06-18 16:19:06,500 INFO ]: Without dead ends: 27 [2018-06-18 16:19:06,501 INFO ]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=220, Invalid=836, Unknown=0, NotChecked=0, Total=1056 [2018-06-18 16:19:06,501 INFO ]: Start minimizeSevpa. Operand 27 states. [2018-06-18 16:19:06,504 INFO ]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-06-18 16:19:06,504 INFO ]: Start removeUnreachable. Operand 27 states. [2018-06-18 16:19:06,505 INFO ]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-06-18 16:19:06,505 INFO ]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 29 [2018-06-18 16:19:06,505 INFO ]: Finished accepts. word is rejected. [2018-06-18 16:19:06,505 INFO ]: Abstraction has 27 states and 28 transitions. [2018-06-18 16:19:06,505 INFO ]: Interpolant automaton has 24 states. [2018-06-18 16:19:06,505 INFO ]: Start isEmpty. Operand 27 states and 28 transitions. [2018-06-18 16:19:06,506 INFO ]: Finished isEmpty. Found accepting run of length 42 [2018-06-18 16:19:06,506 INFO ]: Found error trace [2018-06-18 16:19:06,506 INFO ]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 16:19:06,506 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 16:19:06,507 INFO ]: Analyzing trace with hash 1618126293, now seen corresponding path program 6 times [2018-06-18 16:19:06,507 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 16:19:06,507 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 16:19:06,507 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:19:06,507 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 16:19:06,507 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:19:09,952 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:19:09,955 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. Received shutdown request... [2018-06-18 16:19:40,315 WARN ]: Unable to check validity of interpolant: cancelled [2018-06-18 16:19:40,596 WARN ]: Unable to check validity of interpolant: cancelled [2018-06-18 16:19:41,645 WARN ]: Unable to check validity of interpolant: cancelled [2018-06-18 16:19:41,912 WARN ]: Unable to check validity of interpolant: cancelled [2018-06-18 16:19:42,404 WARN ]: Unable to check validity of interpolant: cancelled [2018-06-18 16:19:42,978 WARN ]: Unable to check validity of interpolant: cancelled Cannot interrupt operation gracefully because timeout expired. Forcing shutdown