java -Xss1g -Xmx4000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCHC.xml --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_No_Goto.epf -i /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_2_e3_112.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 19:11:28,770 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 19:11:28,772 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 19:11:28,783 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 19:11:28,783 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 19:11:28,786 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 19:11:28,787 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 19:11:28,791 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 19:11:28,793 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 19:11:28,794 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 19:11:28,794 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 19:11:28,795 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 19:11:28,795 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 19:11:28,797 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 19:11:28,797 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 19:11:28,798 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 19:11:28,806 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 19:11:28,808 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 19:11:28,809 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 19:11:28,810 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 19:11:28,811 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 19:11:28,814 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 19:11:28,814 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 19:11:28,814 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 19:11:28,815 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 19:11:28,816 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 19:11:28,816 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 19:11:28,817 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 19:11:28,818 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 19:11:28,818 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 19:11:28,819 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 19:11:28,819 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 19:11:28,820 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 19:11:28,821 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 19:11:28,822 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 19:11:28,822 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_No_Goto.epf [2018-06-22 19:11:28,840 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 19:11:28,840 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 19:11:28,841 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 19:11:28,841 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 19:11:28,842 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 19:11:28,842 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 19:11:28,842 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 19:11:28,842 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 19:11:28,842 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 19:11:28,843 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 19:11:28,843 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 19:11:28,843 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 19:11:28,843 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 19:11:28,843 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 19:11:28,844 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 19:11:28,844 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 19:11:28,844 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 19:11:28,844 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 19:11:28,844 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 19:11:28,846 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 19:11:28,846 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 19:11:28,881 INFO ]: Repository-Root is: /tmp [2018-06-22 19:11:28,899 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 19:11:28,906 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 19:11:28,908 INFO ]: Initializing SmtParser... [2018-06-22 19:11:28,908 INFO ]: SmtParser initialized [2018-06-22 19:11:28,909 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_2_e3_112.smt2 [2018-06-22 19:11:28,910 INFO ]: Parsing .smt2 file as a set of Horn Clauses No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-06-22 19:11:29,003 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_2_e3_112.smt2 unknown [2018-06-22 19:11:29,412 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_2_e3_112.smt2 [2018-06-22 19:11:29,419 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 19:11:29,434 INFO ]: Walking toolchain with 4 elements. [2018-06-22 19:11:29,435 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 19:11:29,435 INFO ]: Initializing ChcToBoogie... [2018-06-22 19:11:29,435 INFO ]: ChcToBoogie initialized [2018-06-22 19:11:29,438 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 07:11:29" (1/1) ... [2018-06-22 19:11:29,534 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:11:29 Unit [2018-06-22 19:11:29,535 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 19:11:29,535 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 19:11:29,535 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 19:11:29,535 INFO ]: Boogie Preprocessor initialized [2018-06-22 19:11:29,556 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:11:29" (1/1) ... [2018-06-22 19:11:29,556 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:11:29" (1/1) ... [2018-06-22 19:11:29,565 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:11:29" (1/1) ... [2018-06-22 19:11:29,565 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:11:29" (1/1) ... [2018-06-22 19:11:29,571 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:11:29" (1/1) ... [2018-06-22 19:11:29,572 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:11:29" (1/1) ... [2018-06-22 19:11:29,574 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:11:29" (1/1) ... [2018-06-22 19:11:29,577 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 19:11:29,577 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 19:11:29,577 INFO ]: Initializing RCFGBuilder... [2018-06-22 19:11:29,577 INFO ]: RCFGBuilder initialized [2018-06-22 19:11:29,578 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:11:29" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2018-06-22 19:11:29,587 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 19:11:29,587 INFO ]: Found specification of procedure False [2018-06-22 19:11:29,587 INFO ]: Found implementation of procedure False [2018-06-22 19:11:29,587 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 19:11:29,587 INFO ]: Found specification of procedure state [2018-06-22 19:11:29,587 INFO ]: Found implementation of procedure state [2018-06-22 19:11:29,587 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 19:11:29,587 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 19:11:29,587 INFO ]: Found implementation of procedure Ultimate.START Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 19:11:29,995 INFO ]: Using library mode [2018-06-22 19:11:29,996 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 07:11:29 BoogieIcfgContainer [2018-06-22 19:11:29,996 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 19:11:29,997 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 19:11:29,997 INFO ]: Initializing TraceAbstraction... [2018-06-22 19:11:30,003 INFO ]: TraceAbstraction initialized [2018-06-22 19:11:30,003 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 07:11:29" (1/3) ... [2018-06-22 19:11:30,004 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c93268b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 07:11:30, skipping insertion in model container [2018-06-22 19:11:30,004 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:11:29" (2/3) ... [2018-06-22 19:11:30,004 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c93268b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 07:11:30, skipping insertion in model container [2018-06-22 19:11:30,004 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 07:11:29" (3/3) ... [2018-06-22 19:11:30,007 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 19:11:30,016 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 19:11:30,027 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 19:11:30,077 INFO ]: Using default assertion order modulation [2018-06-22 19:11:30,077 INFO ]: Interprodecural is true [2018-06-22 19:11:30,078 INFO ]: Hoare is false [2018-06-22 19:11:30,078 INFO ]: Compute interpolants for FPandBP [2018-06-22 19:11:30,078 INFO ]: Backedges is TWOTRACK [2018-06-22 19:11:30,078 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 19:11:30,078 INFO ]: Difference is false [2018-06-22 19:11:30,078 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 19:11:30,078 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 19:11:30,092 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 19:11:30,103 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 19:11:30,103 INFO ]: Found error trace [2018-06-22 19:11:30,103 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:11:30,104 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:11:30,107 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-22 19:11:30,109 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:11:30,110 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:11:30,158 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:11:30,158 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:11:30,158 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:11:30,265 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:11:30,410 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 19:11:30,412 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 19:11:30,412 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 19:11:30,414 INFO ]: Interpolant automaton has 4 states [2018-06-22 19:11:30,428 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 19:11:30,428 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 19:11:30,430 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 19:11:30,552 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:11:30,552 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 19:11:30,554 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 19:11:30,555 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 19:11:30,555 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:11:30,566 INFO ]: With dead ends: 13 [2018-06-22 19:11:30,566 INFO ]: Without dead ends: 13 [2018-06-22 19:11:30,567 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 19:11:30,581 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 19:11:30,599 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 19:11:30,601 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 19:11:30,601 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 19:11:30,602 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 19:11:30,603 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:11:30,603 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 19:11:30,603 INFO ]: Interpolant automaton has 4 states. [2018-06-22 19:11:30,603 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 19:11:30,604 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 19:11:30,604 INFO ]: Found error trace [2018-06-22 19:11:30,604 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:11:30,604 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:11:30,604 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-22 19:11:30,604 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:11:30,604 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:11:30,605 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:11:30,605 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:11:30,605 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:11:30,706 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:11:31,276 WARN ]: Spent 346.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2018-06-22 19:11:31,305 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 19:11:31,306 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:11:31,306 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 19:11:31,316 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:11:31,441 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:11:31,451 INFO ]: Computing forward predicates... [2018-06-22 19:11:31,796 WARN ]: Spent 140.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 10 [2018-06-22 19:11:31,907 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 19:11:31,943 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:11:31,944 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-06-22 19:11:31,944 INFO ]: Interpolant automaton has 8 states [2018-06-22 19:11:31,944 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 19:11:31,944 INFO ]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-06-22 19:11:31,945 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2018-06-22 19:11:32,389 WARN ]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2018-06-22 19:11:32,915 WARN ]: Spent 191.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 14 [2018-06-22 19:11:33,019 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:11:33,019 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 19:11:33,023 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 19:11:33,023 INFO ]: Start accepts. Automaton has 8 states. Word has length 13 [2018-06-22 19:11:33,023 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:11:33,024 INFO ]: With dead ends: 15 [2018-06-22 19:11:33,024 INFO ]: Without dead ends: 15 [2018-06-22 19:11:33,024 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2018-06-22 19:11:33,025 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 19:11:33,027 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 19:11:33,027 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 19:11:33,027 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 19:11:33,028 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 19:11:33,028 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:11:33,028 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 19:11:33,028 INFO ]: Interpolant automaton has 8 states. [2018-06-22 19:11:33,028 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 19:11:33,028 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 19:11:33,028 INFO ]: Found error trace [2018-06-22 19:11:33,028 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:11:33,028 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:11:33,029 INFO ]: Analyzing trace with hash -1486246934, now seen corresponding path program 2 times [2018-06-22 19:11:33,029 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:11:33,029 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:11:33,034 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:11:33,034 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:11:33,034 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:11:33,124 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:11:33,481 WARN ]: Spent 145.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2018-06-22 19:11:34,040 WARN ]: Spent 423.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2018-06-22 19:11:34,055 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 19:11:34,055 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:11:34,055 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 19:11:34,087 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 19:11:34,205 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 19:11:34,205 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:11:34,211 INFO ]: Computing forward predicates... [2018-06-22 19:11:34,606 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 19:11:34,638 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:11:34,638 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2018-06-22 19:11:34,639 INFO ]: Interpolant automaton has 13 states [2018-06-22 19:11:34,639 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-22 19:11:34,639 INFO ]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2018-06-22 19:11:34,639 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 13 states. [2018-06-22 19:11:34,868 WARN ]: Spent 178.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 80 [2018-06-22 19:11:35,163 WARN ]: Spent 227.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 93 [2018-06-22 19:11:35,325 WARN ]: Spent 115.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 66 [2018-06-22 19:11:35,383 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:11:35,383 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 19:11:35,384 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 19:11:35,384 INFO ]: Start accepts. Automaton has 13 states. Word has length 17 [2018-06-22 19:11:35,384 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:11:35,385 INFO ]: With dead ends: 17 [2018-06-22 19:11:35,385 INFO ]: Without dead ends: 17 [2018-06-22 19:11:35,385 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 [2018-06-22 19:11:35,385 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 19:11:35,388 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 19:11:35,388 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 19:11:35,389 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 19:11:35,389 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 19:11:35,389 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:11:35,389 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 19:11:35,389 INFO ]: Interpolant automaton has 13 states. [2018-06-22 19:11:35,389 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 19:11:35,390 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 19:11:35,390 INFO ]: Found error trace [2018-06-22 19:11:35,390 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:11:35,390 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:11:35,390 INFO ]: Analyzing trace with hash -2056434034, now seen corresponding path program 3 times [2018-06-22 19:11:35,390 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:11:35,390 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:11:35,391 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:11:35,391 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 19:11:35,391 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:11:35,497 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:11:35,971 WARN ]: Spent 160.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 59 [2018-06-22 19:11:36,172 WARN ]: Spent 168.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 48 [2018-06-22 19:11:36,466 WARN ]: Spent 152.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 43 [2018-06-22 19:11:36,480 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 19:11:36,481 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:11:36,481 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 [2018-06-22 19:11:36,488 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 19:11:36,654 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 19:11:36,654 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:11:36,660 INFO ]: Computing forward predicates... [2018-06-22 19:11:37,005 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 19:11:37,025 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:11:37,025 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2018-06-22 19:11:37,026 INFO ]: Interpolant automaton has 17 states [2018-06-22 19:11:37,026 INFO ]: Constructing interpolant automaton starting with 17 interpolants. [2018-06-22 19:11:37,026 INFO ]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2018-06-22 19:11:37,026 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 17 states. [2018-06-22 19:11:37,288 WARN ]: Spent 219.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 129 [2018-06-22 19:11:37,777 WARN ]: Spent 410.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 125 [2018-06-22 19:11:38,060 WARN ]: Spent 245.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 126 [2018-06-22 19:11:38,313 WARN ]: Spent 203.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 105 [2018-06-22 19:11:38,376 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:11:38,376 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-22 19:11:38,377 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 19:11:38,377 INFO ]: Start accepts. Automaton has 17 states. Word has length 21 [2018-06-22 19:11:38,378 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:11:38,378 INFO ]: With dead ends: 19 [2018-06-22 19:11:38,378 INFO ]: Without dead ends: 19 [2018-06-22 19:11:38,379 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 [2018-06-22 19:11:38,379 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 19:11:38,381 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 19:11:38,381 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 19:11:38,382 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-22 19:11:38,382 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-22 19:11:38,382 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:11:38,382 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-22 19:11:38,382 INFO ]: Interpolant automaton has 17 states. [2018-06-22 19:11:38,382 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-22 19:11:38,383 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 19:11:38,383 INFO ]: Found error trace [2018-06-22 19:11:38,383 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:11:38,383 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:11:38,383 INFO ]: Analyzing trace with hash -434924750, now seen corresponding path program 4 times [2018-06-22 19:11:38,383 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:11:38,383 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:11:38,384 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:11:38,384 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 19:11:38,384 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:11:38,596 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:11:39,353 WARN ]: Spent 271.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 22 [2018-06-22 19:11:40,050 WARN ]: Spent 668.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 58 [2018-06-22 19:11:40,973 WARN ]: Spent 892.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 126 [2018-06-22 19:11:41,159 WARN ]: Spent 166.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 63 [2018-06-22 19:11:41,827 WARN ]: Spent 482.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 77 [2018-06-22 19:11:42,549 WARN ]: Spent 627.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 18 [2018-06-22 19:11:42,569 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 19:11:42,569 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:11:42,569 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 19:11:42,576 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 19:11:42,742 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 19:11:42,742 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:11:42,751 INFO ]: Computing forward predicates... [2018-06-22 19:11:43,474 WARN ]: Spent 164.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2018-06-22 19:11:43,664 WARN ]: Spent 131.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2018-06-22 19:11:44,510 WARN ]: Spent 425.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 39 [2018-06-22 19:11:45,039 WARN ]: Spent 317.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 35 [2018-06-22 19:11:45,077 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 19:11:45,098 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:11:45,098 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2018-06-22 19:11:45,098 INFO ]: Interpolant automaton has 21 states [2018-06-22 19:11:45,098 INFO ]: Constructing interpolant automaton starting with 21 interpolants. [2018-06-22 19:11:45,098 INFO ]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2018-06-22 19:11:45,098 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 21 states. [2018-06-22 19:11:46,226 WARN ]: Spent 1.03 s on a formula simplification. DAG size of input: 248 DAG size of output: 186 [2018-06-22 19:11:47,382 WARN ]: Spent 1.02 s on a formula simplification. DAG size of input: 295 DAG size of output: 166 [2018-06-22 19:11:48,679 WARN ]: Spent 1.23 s on a formula simplification. DAG size of input: 295 DAG size of output: 179 [2018-06-22 19:11:50,024 WARN ]: Spent 1.20 s on a formula simplification. DAG size of input: 268 DAG size of output: 178 [2018-06-22 19:11:51,032 WARN ]: Spent 930.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 177 [2018-06-22 19:11:52,056 WARN ]: Spent 941.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 175 [2018-06-22 19:11:52,141 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:11:52,141 INFO ]: Finished difference Result 23 states and 24 transitions. [2018-06-22 19:11:52,142 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 19:11:52,142 INFO ]: Start accepts. Automaton has 21 states. Word has length 25 [2018-06-22 19:11:52,143 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:11:52,143 INFO ]: With dead ends: 23 [2018-06-22 19:11:52,143 INFO ]: Without dead ends: 23 [2018-06-22 19:11:52,144 INFO ]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2018-06-22 19:11:52,144 INFO ]: Start minimizeSevpa. Operand 23 states. [2018-06-22 19:11:52,148 INFO ]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-06-22 19:11:52,148 INFO ]: Start removeUnreachable. Operand 23 states. [2018-06-22 19:11:52,149 INFO ]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-06-22 19:11:52,149 INFO ]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 25 [2018-06-22 19:11:52,149 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:11:52,149 INFO ]: Abstraction has 23 states and 24 transitions. [2018-06-22 19:11:52,149 INFO ]: Interpolant automaton has 21 states. [2018-06-22 19:11:52,149 INFO ]: Start isEmpty. Operand 23 states and 24 transitions. [2018-06-22 19:11:52,150 INFO ]: Finished isEmpty. Found accepting run of length 34 [2018-06-22 19:11:52,150 INFO ]: Found error trace [2018-06-22 19:11:52,150 INFO ]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:11:52,150 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:11:52,150 INFO ]: Analyzing trace with hash 800064122, now seen corresponding path program 5 times [2018-06-22 19:11:52,150 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:11:52,150 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:11:52,151 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:11:52,151 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 19:11:52,151 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:11:52,967 INFO ]: Conjunction of SSA is unsat Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown