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/cav12/token_ring.6.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 14:33:12,892 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 14:33:12,904 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 14:33:12,917 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 14:33:12,917 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 14:33:12,918 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 14:33:12,919 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 14:33:12,924 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 14:33:12,926 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 14:33:12,928 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 14:33:12,929 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 14:33:12,929 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 14:33:12,930 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 14:33:12,931 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 14:33:12,935 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 14:33:12,936 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 14:33:12,938 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 14:33:12,951 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 14:33:12,952 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 14:33:12,953 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 14:33:12,954 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 14:33:12,956 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 14:33:12,957 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 14:33:12,957 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 14:33:12,958 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 14:33:12,958 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 14:33:12,965 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 14:33:12,966 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 14:33:12,967 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 14:33:12,967 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 14:33:12,967 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 14:33:12,968 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 14:33:12,968 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 14:33:12,969 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 14:33:12,969 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 14:33:12,974 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 14:33:12,992 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 14:33:12,993 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 14:33:12,993 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 14:33:12,993 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 14:33:12,994 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 14:33:12,994 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 14:33:12,995 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 14:33:12,995 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 14:33:12,995 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 14:33:12,995 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 14:33:12,995 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 14:33:12,996 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 14:33:12,996 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 14:33:12,996 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 14:33:12,997 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 14:33:12,997 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 14:33:12,997 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 14:33:12,997 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 14:33:12,997 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 14:33:12,998 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 14:33:12,999 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 14:33:13,049 INFO ]: Repository-Root is: /tmp [2018-06-22 14:33:13,064 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 14:33:13,069 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 14:33:13,070 INFO ]: Initializing SmtParser... [2018-06-22 14:33:13,070 INFO ]: SmtParser initialized [2018-06-22 14:33:13,071 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/cav12/token_ring.6.smt2 [2018-06-22 14:33:13,072 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 14:33:13,159 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/token_ring.6.smt2 unknown [2018-06-22 14:33:15,147 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/token_ring.6.smt2 [2018-06-22 14:33:15,217 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 14:33:15,224 INFO ]: Walking toolchain with 4 elements. [2018-06-22 14:33:15,225 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 14:33:15,225 INFO ]: Initializing ChcToBoogie... [2018-06-22 14:33:15,225 INFO ]: ChcToBoogie initialized [2018-06-22 14:33:15,229 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:33:15" (1/1) ... [2018-06-22 14:33:15,329 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:33:15 Unit [2018-06-22 14:33:15,329 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 14:33:15,330 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 14:33:15,330 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 14:33:15,330 INFO ]: Boogie Preprocessor initialized [2018-06-22 14:33:15,355 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:33:15" (1/1) ... [2018-06-22 14:33:15,355 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:33:15" (1/1) ... [2018-06-22 14:33:15,404 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:33:15" (1/1) ... [2018-06-22 14:33:15,404 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:33:15" (1/1) ... [2018-06-22 14:33:15,459 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:33:15" (1/1) ... [2018-06-22 14:33:15,460 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:33:15" (1/1) ... [2018-06-22 14:33:15,474 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:33:15" (1/1) ... [2018-06-22 14:33:15,489 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 14:33:15,489 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 14:33:15,489 INFO ]: Initializing RCFGBuilder... [2018-06-22 14:33:15,489 INFO ]: RCFGBuilder initialized [2018-06-22 14:33:15,495 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:33:15" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 14:33:15,512 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 14:33:15,512 INFO ]: Found specification of procedure False [2018-06-22 14:33:15,512 INFO ]: Found implementation of procedure False [2018-06-22 14:33:15,512 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 14:33:15,512 INFO ]: Found specification of procedure state [2018-06-22 14:33:15,512 INFO ]: Found implementation of procedure state [2018-06-22 14:33:15,512 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 14:33:15,512 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 14:33:15,512 INFO ]: Found implementation of procedure Ultimate.START [2018-06-22 14:33:17,197 INFO ]: Using library mode [2018-06-22 14:33:17,198 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:33:17 BoogieIcfgContainer [2018-06-22 14:33:17,198 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 14:33:17,199 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 14:33:17,199 INFO ]: Initializing TraceAbstraction... [2018-06-22 14:33:17,204 INFO ]: TraceAbstraction initialized [2018-06-22 14:33:17,204 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:33:15" (1/3) ... [2018-06-22 14:33:17,205 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3da6905a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 02:33:17, skipping insertion in model container [2018-06-22 14:33:17,205 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:33:15" (2/3) ... [2018-06-22 14:33:17,205 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3da6905a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 02:33:17, skipping insertion in model container [2018-06-22 14:33:17,205 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:33:17" (3/3) ... [2018-06-22 14:33:17,208 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 14:33:17,218 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 14:33:17,228 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 14:33:17,275 INFO ]: Using default assertion order modulation [2018-06-22 14:33:17,276 INFO ]: Interprodecural is true [2018-06-22 14:33:17,276 INFO ]: Hoare is false [2018-06-22 14:33:17,276 INFO ]: Compute interpolants for FPandBP [2018-06-22 14:33:17,276 INFO ]: Backedges is TWOTRACK [2018-06-22 14:33:17,276 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 14:33:17,276 INFO ]: Difference is false [2018-06-22 14:33:17,276 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 14:33:17,276 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 14:33:17,294 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 14:33:17,308 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 14:33:17,309 INFO ]: Found error trace [2018-06-22 14:33:17,309 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:33:17,310 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:33:17,316 INFO ]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times [2018-06-22 14:33:17,318 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:33:17,319 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:33:17,368 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:33:17,368 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:33:17,368 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:33:17,489 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:33:17,769 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 14:33:17,772 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 14:33:17,772 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 14:33:17,774 INFO ]: Interpolant automaton has 4 states [2018-06-22 14:33:17,790 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 14:33:17,791 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 14:33:17,793 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 14:33:18,051 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:33:18,051 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 14:33:18,053 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 14:33:18,054 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 14:33:18,054 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:33:18,069 INFO ]: With dead ends: 13 [2018-06-22 14:33:18,069 INFO ]: Without dead ends: 13 [2018-06-22 14:33:18,071 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 14:33:18,090 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 14:33:18,126 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 14:33:18,127 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 14:33:18,128 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 14:33:18,129 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 14:33:18,130 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:33:18,130 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 14:33:18,130 INFO ]: Interpolant automaton has 4 states. [2018-06-22 14:33:18,130 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 14:33:18,131 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 14:33:18,131 INFO ]: Found error trace [2018-06-22 14:33:18,131 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:33:18,131 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:33:18,131 INFO ]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times [2018-06-22 14:33:18,131 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:33:18,131 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:33:18,132 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:33:18,132 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:33:18,132 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:33:18,555 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:33:19,249 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:33:19,249 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:33:19,249 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 14:33:19,265 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:33:19,564 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:33:19,596 INFO ]: Computing forward predicates... [2018-06-22 14:33:21,726 WARN ]: Spent 295.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 20 [2018-06-22 14:33:22,078 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:33:22,102 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:33:22,102 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-06-22 14:33:22,103 INFO ]: Interpolant automaton has 9 states [2018-06-22 14:33:22,103 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 14:33:22,103 INFO ]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2018-06-22 14:33:22,103 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 9 states. [2018-06-22 14:33:22,498 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:33:22,498 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 14:33:22,498 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 14:33:22,498 INFO ]: Start accepts. Automaton has 9 states. Word has length 13 [2018-06-22 14:33:22,499 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:33:22,499 INFO ]: With dead ends: 15 [2018-06-22 14:33:22,499 INFO ]: Without dead ends: 15 [2018-06-22 14:33:22,500 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2018-06-22 14:33:22,500 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 14:33:22,502 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 14:33:22,502 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 14:33:22,503 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 14:33:22,503 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 14:33:22,503 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:33:22,503 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 14:33:22,503 INFO ]: Interpolant automaton has 9 states. [2018-06-22 14:33:22,503 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 14:33:22,504 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 14:33:22,504 INFO ]: Found error trace [2018-06-22 14:33:22,504 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:33:22,504 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:33:22,504 INFO ]: Analyzing trace with hash -1649658231, now seen corresponding path program 2 times [2018-06-22 14:33:22,504 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:33:22,504 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:33:22,505 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:33:22,505 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:33:22,505 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:33:23,002 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:33:23,910 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 14:33:23,910 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:33:23,910 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 14:33:23,920 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 14:33:24,267 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 14:33:24,267 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:33:24,303 INFO ]: Computing forward predicates... [2018-06-22 14:33:26,421 WARN ]: Spent 547.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 20 [2018-06-22 14:33:28,880 WARN ]: Spent 1.07 s on a formula simplification. DAG size of input: 49 DAG size of output: 30 [2018-06-22 14:33:28,945 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 14:33:29,020 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:33:29,020 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2018-06-22 14:33:29,020 INFO ]: Interpolant automaton has 12 states [2018-06-22 14:33:29,020 INFO ]: Constructing interpolant automaton starting with 12 interpolants. [2018-06-22 14:33:29,020 INFO ]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2018-06-22 14:33:29,021 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 12 states. [2018-06-22 14:33:29,394 WARN ]: Spent 282.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2018-06-22 14:33:29,794 WARN ]: Spent 303.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2018-06-22 14:33:29,912 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:33:29,912 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 14:33:29,912 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 14:33:29,912 INFO ]: Start accepts. Automaton has 12 states. Word has length 17 [2018-06-22 14:33:29,913 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:33:29,913 INFO ]: With dead ends: 17 [2018-06-22 14:33:29,913 INFO ]: Without dead ends: 17 [2018-06-22 14:33:29,913 INFO ]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2018-06-22 14:33:29,913 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 14:33:29,916 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 14:33:29,916 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 14:33:29,916 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 14:33:29,917 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 14:33:29,917 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:33:29,917 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 14:33:29,917 INFO ]: Interpolant automaton has 12 states. [2018-06-22 14:33:29,917 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 14:33:29,917 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 14:33:29,917 INFO ]: Found error trace [2018-06-22 14:33:29,917 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:33:29,918 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:33:29,918 INFO ]: Analyzing trace with hash 2119922091, now seen corresponding path program 3 times [2018-06-22 14:33:29,918 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:33:29,918 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:33:29,918 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:33:29,918 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:33:29,918 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:33:30,341 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:33:31,441 WARN ]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-06-22 14:33:31,727 WARN ]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-06-22 14:33:32,100 WARN ]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-06-22 14:33:32,358 WARN ]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-06-22 14:33:32,562 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 14:33:32,562 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:33:32,562 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 14:33:32,569 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 14:33:33,126 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 14:33:33,127 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:33:33,166 INFO ]: Computing forward predicates... [2018-06-22 14:33:34,636 WARN ]: Spent 134.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 20 [2018-06-22 14:33:35,887 WARN ]: Spent 320.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 30 [2018-06-22 14:33:37,254 WARN ]: Spent 757.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2018-06-22 14:33:37,355 INFO ]: Checked inductivity of 21 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 14:33:37,381 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:33:37,381 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2018-06-22 14:33:37,381 INFO ]: Interpolant automaton has 15 states [2018-06-22 14:33:37,381 INFO ]: Constructing interpolant automaton starting with 15 interpolants. [2018-06-22 14:33:37,381 INFO ]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2018-06-22 14:33:37,382 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 15 states. [2018-06-22 14:33:37,845 WARN ]: Spent 264.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 25 [2018-06-22 14:33:38,418 WARN ]: Spent 519.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2018-06-22 14:33:38,483 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:33:38,483 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-22 14:33:38,484 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 14:33:38,484 INFO ]: Start accepts. Automaton has 15 states. Word has length 21 [2018-06-22 14:33:38,484 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:33:38,485 INFO ]: With dead ends: 19 [2018-06-22 14:33:38,485 INFO ]: Without dead ends: 19 [2018-06-22 14:33:38,485 INFO ]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2018-06-22 14:33:38,485 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 14:33:38,488 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 14:33:38,488 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 14:33:38,489 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-22 14:33:38,489 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-22 14:33:38,489 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:33:38,489 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-22 14:33:38,489 INFO ]: Interpolant automaton has 15 states. [2018-06-22 14:33:38,489 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-22 14:33:38,490 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 14:33:38,490 INFO ]: Found error trace [2018-06-22 14:33:38,490 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:33:38,490 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:33:38,490 INFO ]: Analyzing trace with hash 1762711629, now seen corresponding path program 4 times [2018-06-22 14:33:38,490 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:33:38,490 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:33:38,491 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:33:38,491 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:33:38,491 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:33:39,014 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:33:39,965 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 14:33:39,965 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:33:40,083 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 14:33:40,089 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown