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/conc/fib_bench_safe_v2.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 14:45:21,827 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 14:45:21,829 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 14:45:21,842 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 14:45:21,843 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 14:45:21,844 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 14:45:21,845 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 14:45:21,847 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 14:45:21,849 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 14:45:21,849 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 14:45:21,850 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 14:45:21,850 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 14:45:21,853 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 14:45:21,854 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 14:45:21,854 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 14:45:21,855 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 14:45:21,856 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 14:45:21,858 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 14:45:21,859 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 14:45:21,860 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 14:45:21,862 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 14:45:21,864 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 14:45:21,864 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 14:45:21,864 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 14:45:21,865 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 14:45:21,866 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 14:45:21,867 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 14:45:21,867 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 14:45:21,869 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 14:45:21,869 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 14:45:21,869 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 14:45:21,870 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 14:45:21,870 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 14:45:21,871 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 14:45:21,872 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 14:45:21,872 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 14:45:21,885 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 14:45:21,885 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 14:45:21,886 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 14:45:21,886 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 14:45:21,887 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 14:45:21,887 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 14:45:21,887 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 14:45:21,888 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 14:45:21,888 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 14:45:21,888 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 14:45:21,888 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 14:45:21,888 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 14:45:21,889 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 14:45:21,889 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 14:45:21,889 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 14:45:21,889 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 14:45:21,889 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 14:45:21,890 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 14:45:21,890 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 14:45:21,891 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 14:45:21,891 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 14:45:21,937 INFO ]: Repository-Root is: /tmp [2018-06-22 14:45:21,955 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 14:45:21,958 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 14:45:21,959 INFO ]: Initializing SmtParser... [2018-06-22 14:45:21,960 INFO ]: SmtParser initialized [2018-06-22 14:45:21,960 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/conc/fib_bench_safe_v2.smt2 [2018-06-22 14:45:21,961 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 14:45:22,054 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/conc/fib_bench_safe_v2.smt2 unknown [2018-06-22 14:45:22,264 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/conc/fib_bench_safe_v2.smt2 [2018-06-22 14:45:22,269 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 14:45:22,276 INFO ]: Walking toolchain with 4 elements. [2018-06-22 14:45:22,277 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 14:45:22,277 INFO ]: Initializing ChcToBoogie... [2018-06-22 14:45:22,277 INFO ]: ChcToBoogie initialized [2018-06-22 14:45:22,280 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:45:22" (1/1) ... [2018-06-22 14:45:22,321 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:45:22 Unit [2018-06-22 14:45:22,321 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 14:45:22,322 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 14:45:22,322 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 14:45:22,322 INFO ]: Boogie Preprocessor initialized [2018-06-22 14:45:22,345 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:45:22" (1/1) ... [2018-06-22 14:45:22,345 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:45:22" (1/1) ... [2018-06-22 14:45:22,353 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:45:22" (1/1) ... [2018-06-22 14:45:22,353 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:45:22" (1/1) ... [2018-06-22 14:45:22,357 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:45:22" (1/1) ... [2018-06-22 14:45:22,358 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:45:22" (1/1) ... [2018-06-22 14:45:22,360 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:45:22" (1/1) ... [2018-06-22 14:45:22,361 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 14:45:22,362 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 14:45:22,362 INFO ]: Initializing RCFGBuilder... [2018-06-22 14:45:22,362 INFO ]: RCFGBuilder initialized [2018-06-22 14:45:22,371 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:45:22" (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 14:45:22,389 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 14:45:22,389 INFO ]: Found specification of procedure False [2018-06-22 14:45:22,389 INFO ]: Found implementation of procedure False [2018-06-22 14:45:22,389 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 14:45:22,389 INFO ]: Found specification of procedure state [2018-06-22 14:45:22,389 INFO ]: Found implementation of procedure state [2018-06-22 14:45:22,389 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 14:45:22,389 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 14:45:22,389 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 14:45:22,600 INFO ]: Using library mode [2018-06-22 14:45:22,600 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:45:22 BoogieIcfgContainer [2018-06-22 14:45:22,600 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 14:45:22,602 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 14:45:22,602 INFO ]: Initializing TraceAbstraction... [2018-06-22 14:45:22,612 INFO ]: TraceAbstraction initialized [2018-06-22 14:45:22,612 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:45:22" (1/3) ... [2018-06-22 14:45:22,613 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e96653a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 02:45:22, skipping insertion in model container [2018-06-22 14:45:22,613 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:45:22" (2/3) ... [2018-06-22 14:45:22,613 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e96653a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 02:45:22, skipping insertion in model container [2018-06-22 14:45:22,613 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:45:22" (3/3) ... [2018-06-22 14:45:22,624 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 14:45:22,637 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 14:45:22,657 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 14:45:22,713 INFO ]: Using default assertion order modulation [2018-06-22 14:45:22,714 INFO ]: Interprodecural is true [2018-06-22 14:45:22,714 INFO ]: Hoare is false [2018-06-22 14:45:22,714 INFO ]: Compute interpolants for FPandBP [2018-06-22 14:45:22,714 INFO ]: Backedges is TWOTRACK [2018-06-22 14:45:22,714 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 14:45:22,714 INFO ]: Difference is false [2018-06-22 14:45:22,714 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 14:45:22,714 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 14:45:22,729 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 14:45:22,740 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 14:45:22,740 INFO ]: Found error trace [2018-06-22 14:45:22,740 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:45:22,741 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:45:22,744 INFO ]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times [2018-06-22 14:45:22,746 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:45:22,746 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:45:22,777 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:45:22,778 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:45:22,778 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:45:22,818 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:45:22,936 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 14:45:22,938 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 14:45:22,938 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 14:45:22,940 INFO ]: Interpolant automaton has 4 states [2018-06-22 14:45:22,950 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 14:45:22,950 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 14:45:22,953 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 14:45:23,009 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:45:23,009 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 14:45:23,010 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 14:45:23,011 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 14:45:23,011 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:45:23,022 INFO ]: With dead ends: 13 [2018-06-22 14:45:23,022 INFO ]: Without dead ends: 13 [2018-06-22 14:45:23,024 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 14:45:23,036 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 14:45:23,057 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 14:45:23,058 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 14:45:23,059 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 14:45:23,060 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 14:45:23,060 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:45:23,060 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 14:45:23,060 INFO ]: Interpolant automaton has 4 states. [2018-06-22 14:45:23,060 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 14:45:23,061 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 14:45:23,061 INFO ]: Found error trace [2018-06-22 14:45:23,061 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:45:23,061 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:45:23,061 INFO ]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times [2018-06-22 14:45:23,061 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:45:23,061 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:45:23,062 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:45:23,062 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:45:23,062 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:45:23,092 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:45:23,452 WARN ]: Spent 146.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2018-06-22 14:45:23,671 WARN ]: Spent 145.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 17 [2018-06-22 14:45:23,701 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:45:23,701 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:45:23,701 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 14:45:23,710 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:45:23,745 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:45:23,755 INFO ]: Computing forward predicates... [2018-06-22 14:45:25,711 WARN ]: Spent 999.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 44 [2018-06-22 14:45:25,900 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:45:25,931 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:45:25,931 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-06-22 14:45:25,931 INFO ]: Interpolant automaton has 9 states [2018-06-22 14:45:25,931 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 14:45:25,932 INFO ]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2018-06-22 14:45:25,932 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 9 states. [2018-06-22 14:45:26,226 WARN ]: Spent 221.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2018-06-22 14:45:26,563 WARN ]: Spent 314.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2018-06-22 14:45:26,582 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:45:26,582 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 14:45:26,583 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 14:45:26,583 INFO ]: Start accepts. Automaton has 9 states. Word has length 13 [2018-06-22 14:45:26,583 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:45:26,583 INFO ]: With dead ends: 15 [2018-06-22 14:45:26,583 INFO ]: Without dead ends: 15 [2018-06-22 14:45:26,584 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2018-06-22 14:45:26,584 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 14:45:26,586 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 14:45:26,586 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 14:45:26,586 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 14:45:26,586 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 14:45:26,586 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:45:26,586 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 14:45:26,586 INFO ]: Interpolant automaton has 9 states. [2018-06-22 14:45:26,586 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 14:45:26,589 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 14:45:26,589 INFO ]: Found error trace [2018-06-22 14:45:26,589 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:45:26,589 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:45:26,589 INFO ]: Analyzing trace with hash -1649658231, now seen corresponding path program 2 times [2018-06-22 14:45:26,589 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:45:26,589 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:45:26,590 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:45:26,590 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:45:26,590 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:45:26,635 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:45:27,081 WARN ]: Spent 216.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 38 [2018-06-22 14:45:27,210 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 14:45:27,210 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:45:27,210 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 14:45:27,225 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 14:45:27,264 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 14:45:27,264 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:45:27,268 INFO ]: Computing forward predicates... [2018-06-22 14:45:27,727 WARN ]: Simplifying disjunction of 5704 conjuctions. This might take some time... [2018-06-22 14:45:29,277 INFO ]: Simplified to disjunction of 5704 conjuctions. [2018-06-22 14:45:49,764 WARN ]: Spent 140.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 21 [2018-06-22 14:45:50,250 WARN ]: Spent 407.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 50 [2018-06-22 14:45:50,521 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 14:45:50,544 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:45:50,544 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2018-06-22 14:45:50,544 INFO ]: Interpolant automaton has 13 states [2018-06-22 14:45:50,545 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-22 14:45:50,546 INFO ]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2018-06-22 14:45:50,546 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 13 states. [2018-06-22 14:45:51,041 WARN ]: Spent 440.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 71 [2018-06-22 14:45:51,544 WARN ]: Spent 474.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 69 [2018-06-22 14:45:51,940 WARN ]: Spent 329.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 82 [2018-06-22 14:45:51,978 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:45:51,978 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 14:45:51,979 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 14:45:51,979 INFO ]: Start accepts. Automaton has 13 states. Word has length 17 [2018-06-22 14:45:51,979 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:45:51,979 INFO ]: With dead ends: 17 [2018-06-22 14:45:51,979 INFO ]: Without dead ends: 17 [2018-06-22 14:45:51,980 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2018-06-22 14:45:51,980 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 14:45:51,983 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 14:45:51,983 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 14:45:51,983 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 14:45:51,983 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 14:45:51,983 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:45:51,983 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 14:45:51,983 INFO ]: Interpolant automaton has 13 states. [2018-06-22 14:45:51,983 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 14:45:51,984 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 14:45:51,984 INFO ]: Found error trace [2018-06-22 14:45:51,984 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:45:51,984 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:45:51,984 INFO ]: Analyzing trace with hash 2119922091, now seen corresponding path program 3 times [2018-06-22 14:45:51,984 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:45:51,984 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:45:51,985 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:45:51,985 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:45:51,985 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:45:52,026 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:45:52,435 WARN ]: Spent 176.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2018-06-22 14:45:52,731 WARN ]: Spent 151.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 25 [2018-06-22 14:45:52,847 WARN ]: Spent 103.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 27 [2018-06-22 14:45:52,877 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 14:45:52,877 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:45:52,877 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 14:45:52,883 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 14:45:52,912 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 14:45:52,912 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:45:52,916 INFO ]: Computing forward predicates... [2018-06-22 14:45:53,099 WARN ]: Simplifying disjunction of 13320 conjuctions. This might take some time... [2018-06-22 14:46:02,315 INFO ]: Simplified to disjunction of 13320 conjuctions. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown