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_e3_112.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-55b8104 [2018-06-18 16:09:27,836 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-18 16:09:27,838 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-18 16:09:27,850 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-18 16:09:27,850 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-18 16:09:27,851 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-18 16:09:27,852 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-18 16:09:27,854 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-18 16:09:27,856 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-18 16:09:27,856 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-18 16:09:27,857 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-18 16:09:27,857 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-18 16:09:27,858 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-18 16:09:27,862 INFO L177 SettingsManager]: ChcToBoogie provides no preferences, ignoring... [2018-06-18 16:09:27,863 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-18 16:09:27,864 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-18 16:09:27,866 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-18 16:09:27,867 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-18 16:09:27,869 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-18 16:09:27,870 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-18 16:09:27,871 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-18 16:09:27,883 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-18 16:09:27,883 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-18 16:09:27,884 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-18 16:09:27,885 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-18 16:09:27,886 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-18 16:09:27,886 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-18 16:09:27,887 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-18 16:09:27,888 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-18 16:09:27,888 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-18 16:09:27,889 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-18 16:09:27,890 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-18 16:09:27,890 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-18 16:09:27,896 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-18 16:09:27,897 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-18 16:09:27,897 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chccomp2018/chcToBoogie_automizer.epf [2018-06-18 16:09:27,919 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-18 16:09:27,920 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-18 16:09:27,921 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-18 16:09:27,921 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-18 16:09:27,922 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-18 16:09:27,922 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-18 16:09:27,923 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-18 16:09:27,923 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-18 16:09:27,923 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-18 16:09:27,923 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-18 16:09:27,923 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-18 16:09:27,924 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-18 16:09:27,924 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-18 16:09:27,924 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-18 16:09:27,925 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-18 16:09:27,925 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-18 16:09:27,925 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-18 16:09:27,926 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-18 16:09:27,927 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-18 16:09:27,976 INFO ]: Repository-Root is: /tmp [2018-06-18 16:09:27,993 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-18 16:09:27,997 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-18 16:09:27,999 INFO ]: Initializing SmtParser... [2018-06-18 16:09:27,999 INFO ]: SmtParser initialized [2018-06-18 16:09:28,000 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_2_e3_112.smt2 [2018-06-18 16:09:28,001 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 16:09:28,086 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_2_e3_112.smt2 unknown [2018-06-18 16:09:28,450 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_2_e3_112.smt2 [2018-06-18 16:09:28,454 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-18 16:09:28,460 INFO ]: Walking toolchain with 4 elements. [2018-06-18 16:09:28,460 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-18 16:09:28,460 INFO ]: Initializing ChcToBoogie... [2018-06-18 16:09:28,460 INFO ]: ChcToBoogie initialized [2018-06-18 16:09:28,467 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 04:09:28" (1/1) ... [2018-06-18 16:09:28,537 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:09:28 Unit [2018-06-18 16:09:28,537 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-18 16:09:28,538 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-18 16:09:28,538 INFO ]: Initializing Boogie Preprocessor... [2018-06-18 16:09:28,538 INFO ]: Boogie Preprocessor initialized [2018-06-18 16:09:28,576 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:09:28" (1/1) ... [2018-06-18 16:09:28,576 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:09:28" (1/1) ... [2018-06-18 16:09:28,587 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:09:28" (1/1) ... [2018-06-18 16:09:28,588 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:09:28" (1/1) ... [2018-06-18 16:09:28,593 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:09:28" (1/1) ... [2018-06-18 16:09:28,595 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:09:28" (1/1) ... [2018-06-18 16:09:28,597 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:09:28" (1/1) ... [2018-06-18 16:09:28,600 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-18 16:09:28,601 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-18 16:09:28,601 INFO ]: Initializing RCFGBuilder... [2018-06-18 16:09:28,601 INFO ]: RCFGBuilder initialized [2018-06-18 16:09:28,601 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:09:28" (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 16:09:28,616 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-18 16:09:28,616 INFO ]: Found specification of procedure False [2018-06-18 16:09:28,616 INFO ]: Found implementation of procedure False [2018-06-18 16:09:28,616 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-18 16:09:28,616 INFO ]: Found specification of procedure state [2018-06-18 16:09:28,616 INFO ]: Found implementation of procedure state [2018-06-18 16:09:28,616 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-18 16:09:28,616 INFO ]: Found specification of procedure Ultimate.START [2018-06-18 16:09:28,616 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 16:09:28,945 INFO ]: Using library mode [2018-06-18 16:09:28,945 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 04:09:28 BoogieIcfgContainer [2018-06-18 16:09:28,945 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-18 16:09:28,947 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-18 16:09:28,947 INFO ]: Initializing TraceAbstraction... [2018-06-18 16:09:28,950 INFO ]: TraceAbstraction initialized [2018-06-18 16:09:28,950 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 04:09:28" (1/3) ... [2018-06-18 16:09:28,951 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4801cbde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 18.06 04:09:28, skipping insertion in model container [2018-06-18 16:09:28,951 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:09:28" (2/3) ... [2018-06-18 16:09:28,952 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4801cbde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.06 04:09:28, skipping insertion in model container [2018-06-18 16:09:28,952 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 04:09:28" (3/3) ... [2018-06-18 16:09:28,953 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-18 16:09:28,963 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-18 16:09:28,972 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-18 16:09:29,013 INFO ]: Using default assertion order modulation [2018-06-18 16:09:29,013 INFO ]: Interprodecural is true [2018-06-18 16:09:29,013 INFO ]: Hoare is false [2018-06-18 16:09:29,013 INFO ]: Compute interpolants for FPandBP [2018-06-18 16:09:29,013 INFO ]: Backedges is TWOTRACK [2018-06-18 16:09:29,013 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-18 16:09:29,013 INFO ]: Difference is false [2018-06-18 16:09:29,013 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-18 16:09:29,013 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-18 16:09:29,026 INFO ]: Start isEmpty. Operand 13 states. [2018-06-18 16:09:29,041 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-18 16:09:29,041 INFO ]: Found error trace [2018-06-18 16:09:29,044 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 16:09:29,045 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 16:09:29,049 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-18 16:09:29,050 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 16:09:29,051 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 16:09:29,084 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:09:29,084 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 16:09:29,084 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:09:29,187 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:09:29,197 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 16:09:29,316 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-18 16:09:29,318 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-18 16:09:29,318 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-18 16:09:29,319 INFO ]: Interpolant automaton has 4 states [2018-06-18 16:09:29,330 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-18 16:09:29,330 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-18 16:09:29,332 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-18 16:09:29,475 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 16:09:29,475 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-18 16:09:29,477 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-18 16:09:29,478 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-18 16:09:29,478 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 16:09:29,493 INFO ]: With dead ends: 13 [2018-06-18 16:09:29,493 INFO ]: Without dead ends: 13 [2018-06-18 16:09:29,495 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 16:09:29,513 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-18 16:09:29,549 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-18 16:09:29,551 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-18 16:09:29,551 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-18 16:09:29,553 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-18 16:09:29,553 INFO ]: Finished accepts. word is rejected. [2018-06-18 16:09:29,553 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-18 16:09:29,553 INFO ]: Interpolant automaton has 4 states. [2018-06-18 16:09:29,553 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-18 16:09:29,554 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-18 16:09:29,554 INFO ]: Found error trace [2018-06-18 16:09:29,554 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 16:09:29,555 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 16:09:29,555 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-18 16:09:29,555 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 16:09:29,555 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 16:09:29,557 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:09:29,557 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 16:09:29,557 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:09:29,658 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:09:29,659 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 16:09:30,322 WARN ]: Spent 454.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2018-06-18 16:09:30,375 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 16:09:30,375 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 16:09:30,375 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 16:09:30,383 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 16:09:30,503 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:09:30,513 INFO ]: Computing forward predicates... [2018-06-18 16:09:30,981 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 16:09:31,015 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 16:09:31,015 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-06-18 16:09:31,016 INFO ]: Interpolant automaton has 8 states [2018-06-18 16:09:31,016 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-18 16:09:31,016 INFO ]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-06-18 16:09:31,017 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2018-06-18 16:09:31,537 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 16:09:31,538 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-18 16:09:31,540 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-18 16:09:31,540 INFO ]: Start accepts. Automaton has 8 states. Word has length 13 [2018-06-18 16:09:31,541 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 16:09:31,541 INFO ]: With dead ends: 15 [2018-06-18 16:09:31,541 INFO ]: Without dead ends: 15 [2018-06-18 16:09:31,542 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2018-06-18 16:09:31,542 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-18 16:09:31,544 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-18 16:09:31,544 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-18 16:09:31,545 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-18 16:09:31,545 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-18 16:09:31,545 INFO ]: Finished accepts. word is rejected. [2018-06-18 16:09:31,545 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-18 16:09:31,545 INFO ]: Interpolant automaton has 8 states. [2018-06-18 16:09:31,545 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-18 16:09:31,548 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-18 16:09:31,548 INFO ]: Found error trace [2018-06-18 16:09:31,549 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 16:09:31,549 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 16:09:31,549 INFO ]: Analyzing trace with hash -1486246934, now seen corresponding path program 2 times [2018-06-18 16:09:31,549 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 16:09:31,549 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 16:09:31,550 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:09:31,550 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 16:09:31,550 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:09:31,676 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:09:31,677 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 16:09:32,653 WARN ]: Spent 471.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2018-06-18 16:09:32,809 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-18 16:09:32,809 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 16:09:32,809 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 16:09:32,841 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-18 16:09:32,953 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-18 16:09:32,953 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:09:32,958 INFO ]: Computing forward predicates... [2018-06-18 16:09:33,146 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-18 16:09:33,168 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 16:09:33,168 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2018-06-18 16:09:33,169 INFO ]: Interpolant automaton has 13 states [2018-06-18 16:09:33,169 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-18 16:09:33,169 INFO ]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2018-06-18 16:09:33,169 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 13 states. [2018-06-18 16:09:33,383 WARN ]: Spent 143.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 78 [2018-06-18 16:09:33,653 WARN ]: Spent 211.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 92 [2018-06-18 16:09:33,827 WARN ]: Spent 129.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 64 [2018-06-18 16:09:33,885 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 16:09:33,885 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-18 16:09:33,886 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-18 16:09:33,886 INFO ]: Start accepts. Automaton has 13 states. Word has length 17 [2018-06-18 16:09:33,886 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 16:09:33,887 INFO ]: With dead ends: 17 [2018-06-18 16:09:33,887 INFO ]: Without dead ends: 17 [2018-06-18 16:09:33,888 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2018-06-18 16:09:33,888 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-18 16:09:33,891 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-18 16:09:33,891 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-18 16:09:33,891 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-18 16:09:33,891 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-18 16:09:33,892 INFO ]: Finished accepts. word is rejected. [2018-06-18 16:09:33,892 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-18 16:09:33,892 INFO ]: Interpolant automaton has 13 states. [2018-06-18 16:09:33,892 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-18 16:09:33,892 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-18 16:09:33,892 INFO ]: Found error trace [2018-06-18 16:09:33,892 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 16:09:33,892 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 16:09:33,892 INFO ]: Analyzing trace with hash -2056434034, now seen corresponding path program 3 times [2018-06-18 16:09:33,892 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 16:09:33,893 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 16:09:33,893 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:09:33,893 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 16:09:33,893 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:09:34,017 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:09:34,018 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 16:09:34,605 WARN ]: Spent 158.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 59 [2018-06-18 16:09:34,808 WARN ]: Spent 161.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 48 [2018-06-18 16:09:35,048 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-18 16:09:35,048 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 16:09:35,048 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 16:09:35,054 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-18 16:09:35,213 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-18 16:09:35,213 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:09:35,220 INFO ]: Computing forward predicates... [2018-06-18 16:09:35,560 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-18 16:09:35,580 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 16:09:35,580 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2018-06-18 16:09:35,580 INFO ]: Interpolant automaton has 17 states [2018-06-18 16:09:35,581 INFO ]: Constructing interpolant automaton starting with 17 interpolants. [2018-06-18 16:09:35,581 INFO ]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2018-06-18 16:09:35,581 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 17 states. [2018-06-18 16:09:35,857 WARN ]: Spent 233.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 129 [2018-06-18 16:09:36,343 WARN ]: Spent 406.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 125 [2018-06-18 16:09:36,636 WARN ]: Spent 241.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 126 [2018-06-18 16:09:36,878 WARN ]: Spent 204.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 105 [2018-06-18 16:09:36,924 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 16:09:36,925 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-18 16:09:36,926 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-18 16:09:36,926 INFO ]: Start accepts. Automaton has 17 states. Word has length 21 [2018-06-18 16:09:36,926 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 16:09:36,927 INFO ]: With dead ends: 19 [2018-06-18 16:09:36,927 INFO ]: Without dead ends: 19 [2018-06-18 16:09:36,927 INFO ]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2018-06-18 16:09:36,927 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-18 16:09:36,931 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-18 16:09:36,931 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-18 16:09:36,931 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-18 16:09:36,931 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-18 16:09:36,931 INFO ]: Finished accepts. word is rejected. [2018-06-18 16:09:36,931 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-18 16:09:36,931 INFO ]: Interpolant automaton has 17 states. [2018-06-18 16:09:36,932 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-18 16:09:36,932 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-18 16:09:36,932 INFO ]: Found error trace [2018-06-18 16:09:36,932 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 16:09:36,932 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 16:09:36,932 INFO ]: Analyzing trace with hash -434924750, now seen corresponding path program 4 times [2018-06-18 16:09:36,933 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 16:09:36,933 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 16:09:36,936 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:09:36,936 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 16:09:36,936 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:09:37,104 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:09:37,105 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 16:09:37,779 WARN ]: Spent 178.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 23 [2018-06-18 16:09:38,511 WARN ]: Spent 702.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 66 [2018-06-18 16:09:39,560 WARN ]: Spent 1.03 s on a formula simplification. DAG size of input: 151 DAG size of output: 85 [2018-06-18 16:09:40,037 WARN ]: Spent 422.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 64 [2018-06-18 16:09:40,924 WARN ]: Spent 729.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 49 [2018-06-18 16:09:41,613 WARN ]: Spent 610.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 59 [2018-06-18 16:09:42,312 WARN ]: Spent 513.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 26 [2018-06-18 16:09:42,342 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-18 16:09:42,342 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 16:09:42,342 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 16:09:42,348 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-18 16:09:42,501 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-18 16:09:42,501 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:09:42,512 INFO ]: Computing forward predicates... [2018-06-18 16:09:43,064 WARN ]: Spent 162.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2018-06-18 16:09:43,262 WARN ]: Spent 150.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2018-06-18 16:09:44,397 WARN ]: Spent 494.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 39 [2018-06-18 16:09:45,264 WARN ]: Spent 332.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 35 [2018-06-18 16:09:45,517 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-18 16:09:45,538 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 16:09:45,538 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2018-06-18 16:09:45,538 INFO ]: Interpolant automaton has 21 states [2018-06-18 16:09:45,538 INFO ]: Constructing interpolant automaton starting with 21 interpolants. [2018-06-18 16:09:45,539 INFO ]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2018-06-18 16:09:45,539 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 21 states. [2018-06-18 16:09:46,602 WARN ]: Spent 988.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 170 [2018-06-18 16:09:47,837 WARN ]: Spent 1.10 s on a formula simplification. DAG size of input: 267 DAG size of output: 173 [2018-06-18 16:09:49,418 WARN ]: Spent 1.43 s on a formula simplification. DAG size of input: 272 DAG size of output: 181 [2018-06-18 16:09:51,002 WARN ]: Spent 1.46 s on a formula simplification. DAG size of input: 254 DAG size of output: 187 [2018-06-18 16:09:52,013 WARN ]: Spent 923.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 149 [2018-06-18 16:09:52,147 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 16:09:52,147 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-18 16:09:52,148 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-18 16:09:52,148 INFO ]: Start accepts. Automaton has 21 states. Word has length 25 [2018-06-18 16:09:52,149 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 16:09:52,149 INFO ]: With dead ends: 21 [2018-06-18 16:09:52,149 INFO ]: Without dead ends: 21 [2018-06-18 16:09:52,150 INFO ]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2018-06-18 16:09:52,150 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-18 16:09:52,153 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-18 16:09:52,153 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-18 16:09:52,154 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-18 16:09:52,154 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 25 [2018-06-18 16:09:52,155 INFO ]: Finished accepts. word is rejected. [2018-06-18 16:09:52,155 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-18 16:09:52,155 INFO ]: Interpolant automaton has 21 states. [2018-06-18 16:09:52,155 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-18 16:09:52,156 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-18 16:09:52,156 INFO ]: Found error trace [2018-06-18 16:09:52,156 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 16:09:52,156 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 16:09:52,156 INFO ]: Analyzing trace with hash 1986427350, now seen corresponding path program 5 times [2018-06-18 16:09:52,156 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 16:09:52,156 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 16:09:52,157 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:09:52,157 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 16:09:52,157 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:09:52,450 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:09:52,452 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 16:09:55,918 WARN ]: Spent 711.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2018-06-18 16:09:56,331 WARN ]: Spent 384.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 49 [2018-06-18 16:09:56,818 WARN ]: Spent 442.00 ms on a formula simplification. DAG size of input: 271 DAG size of output: 73 [2018-06-18 16:09:58,299 WARN ]: Spent 1.31 s on a formula simplification. DAG size of input: 364 DAG size of output: 67 [2018-06-18 16:10:00,933 WARN ]: Spent 2.51 s on a formula simplification. DAG size of input: 385 DAG size of output: 63 [2018-06-18 16:10:02,370 WARN ]: Spent 1.31 s on a formula simplification. DAG size of input: 243 DAG size of output: 43 [2018-06-18 16:10:03,692 WARN ]: Spent 1.17 s on a formula simplification. DAG size of input: 456 DAG size of output: 57 [2018-06-18 16:10:04,752 WARN ]: Spent 891.00 ms on a formula simplification. DAG size of input: 395 DAG size of output: 52 [2018-06-18 16:10:05,439 WARN ]: Spent 519.00 ms on a formula simplification. DAG size of input: 250 DAG size of output: 32 [2018-06-18 16:10:05,462 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-18 16:10:05,462 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 16:10:05,462 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 16:10:05,470 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-18 16:10:05,730 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-06-18 16:10:05,730 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:10:05,741 INFO ]: Computing forward predicates... [2018-06-18 16:10:08,295 WARN ]: Spent 362.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 43 [2018-06-18 16:10:08,837 WARN ]: Spent 322.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 43 [2018-06-18 16:10:09,016 WARN ]: Spent 127.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2018-06-18 16:10:10,067 WARN ]: Spent 512.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 41 [2018-06-18 16:10:11,736 WARN ]: Spent 1.29 s on a formula simplification. DAG size of input: 237 DAG size of output: 39 [2018-06-18 16:10:11,942 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-18 16:10:11,963 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 16:10:11,963 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2018-06-18 16:10:11,963 INFO ]: Interpolant automaton has 24 states [2018-06-18 16:10:11,963 INFO ]: Constructing interpolant automaton starting with 24 interpolants. [2018-06-18 16:10:11,963 INFO ]: CoverageRelationStatistics Valid=53, Invalid=499, Unknown=0, NotChecked=0, Total=552 [2018-06-18 16:10:11,964 INFO ]: Start difference. First operand 21 states and 22 transitions. Second operand 24 states. [2018-06-18 16:10:13,484 WARN ]: Spent 1.43 s on a formula simplification. DAG size of input: 242 DAG size of output: 187 [2018-06-18 16:10:13,796 WARN ]: Spent 271.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 84 [2018-06-18 16:10:15,280 WARN ]: Spent 1.40 s on a formula simplification. DAG size of input: 356 DAG size of output: 166 [2018-06-18 16:10:17,126 WARN ]: Spent 1.76 s on a formula simplification. DAG size of input: 358 DAG size of output: 192 [2018-06-18 16:10:18,779 WARN ]: Spent 1.56 s on a formula simplification. DAG size of input: 307 DAG size of output: 179 [2018-06-18 16:10:20,236 WARN ]: Spent 1.36 s on a formula simplification. DAG size of input: 279 DAG size of output: 190 [2018-06-18 16:10:21,578 WARN ]: Spent 1.24 s on a formula simplification. DAG size of input: 235 DAG size of output: 163 [2018-06-18 16:10:21,739 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 16:10:21,739 INFO ]: Finished difference Result 23 states and 24 transitions. [2018-06-18 16:10:21,741 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-18 16:10:21,741 INFO ]: Start accepts. Automaton has 24 states. Word has length 29 [2018-06-18 16:10:21,741 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 16:10:21,742 INFO ]: With dead ends: 23 [2018-06-18 16:10:21,742 INFO ]: Without dead ends: 23 [2018-06-18 16:10:21,742 INFO ]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 23.0s TimeCoverageRelationStatistics Valid=180, Invalid=750, Unknown=0, NotChecked=0, Total=930 [2018-06-18 16:10:21,742 INFO ]: Start minimizeSevpa. Operand 23 states. [2018-06-18 16:10:21,747 INFO ]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-06-18 16:10:21,747 INFO ]: Start removeUnreachable. Operand 23 states. [2018-06-18 16:10:21,748 INFO ]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-06-18 16:10:21,748 INFO ]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 29 [2018-06-18 16:10:21,748 INFO ]: Finished accepts. word is rejected. [2018-06-18 16:10:21,748 INFO ]: Abstraction has 23 states and 24 transitions. [2018-06-18 16:10:21,748 INFO ]: Interpolant automaton has 24 states. [2018-06-18 16:10:21,748 INFO ]: Start isEmpty. Operand 23 states and 24 transitions. [2018-06-18 16:10:21,749 INFO ]: Finished isEmpty. Found accepting run of length 34 [2018-06-18 16:10:21,749 INFO ]: Found error trace [2018-06-18 16:10:21,749 INFO ]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 16:10:21,749 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 16:10:21,749 INFO ]: Analyzing trace with hash 800064122, now seen corresponding path program 6 times [2018-06-18 16:10:21,749 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 16:10:21,749 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 16:10:21,750 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:10:21,750 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 16:10:21,750 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:10:22,043 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:10:22,044 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